SemaStmt.cpp revision 9087599e5ee64ecd30194b3d89f8748ac95c62f7
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- SemaStmt.cpp - Semantic Analysis for Statements ------------------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements semantic analysis for statements. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 142d88708cbe4e4ec5e04e4acb6bd7f5be68557379John McCall#include "clang/Sema/SemaInternal.h" 155f1e0942a32657b625702aa52f82430d0120f424John McCall#include "clang/Sema/Scope.h" 16781472fe99a120098c631b0cbe33c89f8cef5e70John McCall#include "clang/Sema/ScopeInfo.h" 17e737f5041a36d0befb39ffeed8d50ba15916d3daDouglas Gregor#include "clang/Sema/Initialization.h" 18ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith#include "clang/Sema/Lookup.h" 19f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner#include "clang/AST/ASTContext.h" 201cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall#include "clang/AST/CharUnits.h" 21c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 22694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu#include "clang/AST/EvaluatedExprVisitor.h" 2384fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor#include "clang/AST/ExprCXX.h" 24419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner#include "clang/AST/ExprObjC.h" 2516f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtObjC.h" 2616f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtCXX.h" 27209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall#include "clang/AST/TypeLoc.h" 2884fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor#include "clang/Lex/Preprocessor.h" 296fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson#include "clang/Basic/TargetInfo.h" 30ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner#include "llvm/ADT/ArrayRef.h" 31c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/STLExtras.h" 32694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu#include "llvm/ADT/SmallPtrSet.h" 33c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/SmallVector.h" 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 35781472fe99a120098c631b0cbe33c89f8cef5e70John McCallusing namespace sema; 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::ActOnExprStmt(FullExprArg expr) { 389ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E = expr.get(); 39bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor if (!E) // FIXME: FullExprArg has no error state? 40bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor return StmtError(); 41bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor 42834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // C99 6.8.3p2: The expression in an expression statement is evaluated as a 43834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // void expression for its side effects. Conversion to void allows any 44834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // operand, even incomplete types. 45a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 46834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // Same thing in for stmt first clause (when expr) and third clause. 47a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(static_cast<Stmt*>(E)); 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 51b7d98d35ea723624345f06e5895ddce2e0388ef0Argyrios KyrtzidisStmtResult Sema::ActOnNullStmt(SourceLocation SemiLoc, 52e2ca828119b8bff4a5c25c6db8ee4fec558451e7Argyrios Kyrtzidis bool HasLeadingEmptyMacro) { 53e2ca828119b8bff4a5c25c6db8ee4fec558451e7Argyrios Kyrtzidis return Owned(new (Context) NullStmt(SemiLoc, HasLeadingEmptyMacro)); 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 56337e550218128e7d922c09bb354fbc71de90c568Chris LattnerStmtResult Sema::ActOnDeclStmt(DeclGroupPtrTy dg, SourceLocation StartLoc, 57337e550218128e7d922c09bb354fbc71de90c568Chris Lattner SourceLocation EndLoc) { 5820401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 60682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // If we have an invalid decl, just return an error. 6120401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner if (DG.isNull()) return StmtError(); 621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return Owned(new (Context) DeclStmt(DG, StartLoc, EndLoc)); 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 66a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanianvoid Sema::ActOnForEachDeclStmt(DeclGroupPtrTy dg) { 67a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 68dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 69a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian // If we have an invalid decl, just return. 70a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian if (DG.isNull() || !DG.isSingleDecl()) return; 71f85e193739c953358c865005855253af4f68a497John McCall VarDecl *var = cast<VarDecl>(DG.getSingleDecl()); 72f85e193739c953358c865005855253af4f68a497John McCall 73a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian // suppress any potential 'unused variable' warning. 74f85e193739c953358c865005855253af4f68a497John McCall var->setUsed(); 75f85e193739c953358c865005855253af4f68a497John McCall 767acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // foreach variables are never actually initialized in the way that 777acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // the parser came up with. 787acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall var->setInit(0); 797acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall 807acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // In ARC, we don't need to retain the iteration variable of a fast 817acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // enumeration loop. Rather than actually trying to catch that 827acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // during declaration processing, we remove the consequences here. 834e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().ObjCAutoRefCount) { 847acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall QualType type = var->getType(); 857acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall 867acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // Only do this if we inferred the lifetime. Inferred lifetime 877acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // will show up as a local qualifier because explicit lifetime 887acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // should have shown up as an AttributedType instead. 897acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall if (type.getLocalQualifiers().getObjCLifetime() == Qualifiers::OCL_Strong) { 907acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // Add 'const' and mark the variable as pseudo-strong. 917acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall var->setType(type.withConst()); 927acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall var->setARCPseudoStrong(true); 93f85e193739c953358c865005855253af4f68a497John McCall } 94f85e193739c953358c865005855253af4f68a497John McCall } 95a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian} 96a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian 97ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth/// \brief Diagnose unused '==' and '!=' as likely typos for '=' or '|='. 989d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth/// 999d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth/// Adding a cast to void (or other expression wrappers) will prevent the 1009d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth/// warning from firing. 101ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruthstatic bool DiagnoseUnusedComparison(Sema &S, const Expr *E) { 1029d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth SourceLocation Loc; 10350bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth bool IsNotEqual, CanAssign; 1049d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 1059d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth if (const BinaryOperator *Op = dyn_cast<BinaryOperator>(E)) { 1069d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth if (Op->getOpcode() != BO_EQ && Op->getOpcode() != BO_NE) 107ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return false; 1089d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 1099d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth Loc = Op->getOperatorLoc(); 11050bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth IsNotEqual = Op->getOpcode() == BO_NE; 11150bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth CanAssign = Op->getLHS()->IgnoreParenImpCasts()->isLValue(); 1129d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth } else if (const CXXOperatorCallExpr *Op = dyn_cast<CXXOperatorCallExpr>(E)) { 1139d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth if (Op->getOperator() != OO_EqualEqual && 1149d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth Op->getOperator() != OO_ExclaimEqual) 115ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return false; 1169d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 1179d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth Loc = Op->getOperatorLoc(); 11850bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth IsNotEqual = Op->getOperator() == OO_ExclaimEqual; 11950bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth CanAssign = Op->getArg(0)->IgnoreParenImpCasts()->isLValue(); 1209d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth } else { 1219d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth // Not a typo-prone comparison. 122ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return false; 1239d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth } 1249d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 1259d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth // Suppress warnings when the operator, suspicious as it may be, comes from 1269d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth // a macro expansion. 1279d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth if (Loc.isMacroID()) 128ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return false; 1299d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 130ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth S.Diag(Loc, diag::warn_unused_comparison) 1319d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth << (unsigned)IsNotEqual << E->getSourceRange(); 1329d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 13350bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth // If the LHS is a plausible entity to assign to, provide a fixit hint to 13450bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth // correct common typos. 13550bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth if (CanAssign) { 13650bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth if (IsNotEqual) 13750bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth S.Diag(Loc, diag::note_inequality_comparison_to_or_assign) 13850bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth << FixItHint::CreateReplacement(Loc, "|="); 13950bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth else 14050bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth S.Diag(Loc, diag::note_equality_comparison_to_assign) 14150bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth << FixItHint::CreateReplacement(Loc, "="); 14250bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth } 143ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth 144ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return true; 1459d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth} 1469d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 147636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlssonvoid Sema::DiagnoseUnusedExprResult(const Stmt *S) { 148d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis if (const LabelStmt *Label = dyn_cast_or_null<LabelStmt>(S)) 149d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis return DiagnoseUnusedExprResult(Label->getSubStmt()); 150d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis 151754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson const Expr *E = dyn_cast_or_null<Expr>(S); 152636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (!E) 153636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 154636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 155636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceLocation Loc; 156636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceRange R1, R2; 157d87a0cd2b3e1c9e9f01212875f4cbe5b7bb7ab57Matt Beaumont-Gay if (SourceMgr.isInSystemMacro(E->getExprLoc()) || 158d87a0cd2b3e1c9e9f01212875f4cbe5b7bb7ab57Matt Beaumont-Gay !E->isUnusedResultAWarning(Loc, R1, R2, Context)) 159636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 1601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 161419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // Okay, we have an unused result. Depending on what the base expression is, 162419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // we might want to make a more specific diagnostic. Check for one of these 163419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // cases now. 164419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner unsigned DiagID = diag::warn_unused_expr; 1654765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall if (const ExprWithCleanups *Temps = dyn_cast<ExprWithCleanups>(E)) 1664dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor E = Temps->getSubExpr(); 16734d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth if (const CXXBindTemporaryExpr *TempExpr = dyn_cast<CXXBindTemporaryExpr>(E)) 16834d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth E = TempExpr->getSubExpr(); 16912f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall 170ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth if (DiagnoseUnusedComparison(*this, E)) 171ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return; 172ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth 173f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall E = E->IgnoreParenImpCasts(); 174bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { 1750faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall if (E->getType()->isVoidType()) 1760faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall return; 1770faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall 178bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // If the callee has attribute pure, const, or warn_unused_result, warn with 179bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // a more specific message to make it clear what is happening. 180d20254f2875d0004c57ee766f258dbcee29f4841Nuno Lopes if (const Decl *FD = CE->getCalleeDecl()) { 181bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<WarnUnusedResultAttr>()) { 18242d7b2d25b6f90dc397886d05502b10ab5a8b51bMatt Beaumont-Gay Diag(Loc, diag::warn_unused_result) << R1 << R2; 183bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 184bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 185bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<PureAttr>()) { 186bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "pure"; 187bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 188bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 189bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<ConstAttr>()) { 190bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "const"; 191bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 192bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 193dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 19412f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (const ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(E)) { 1954e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().ObjCAutoRefCount && ME->isDelegateInitCall()) { 196f85e193739c953358c865005855253af4f68a497John McCall Diag(Loc, diag::err_arc_unused_init_message) << R1; 197f85e193739c953358c865005855253af4f68a497John McCall return; 198f85e193739c953358c865005855253af4f68a497John McCall } 199f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian const ObjCMethodDecl *MD = ME->getMethodDecl(); 200f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian if (MD && MD->getAttr<WarnUnusedResultAttr>()) { 20142d7b2d25b6f90dc397886d05502b10ab5a8b51bMatt Beaumont-Gay Diag(Loc, diag::warn_unused_result) << R1 << R2; 202f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian return; 203f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 204ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek } else if (const PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(E)) { 205ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek const Expr *Source = POE->getSyntacticForm(); 206ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek if (isa<ObjCSubscriptRefExpr>(Source)) 207ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek DiagID = diag::warn_unused_container_subscript_expr; 208ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek else 209ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek DiagID = diag::warn_unused_property_expr; 210d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor } else if (const CXXFunctionalCastExpr *FC 211d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor = dyn_cast<CXXFunctionalCastExpr>(E)) { 212d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor if (isa<CXXConstructExpr>(FC->getSubExpr()) || 213d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor isa<CXXTemporaryObjectExpr>(FC->getSubExpr())) 214d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor return; 215f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 216209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // Diagnose "(void*) blah" as a typo for "(void) blah". 217209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall else if (const CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(E)) { 218209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall TypeSourceInfo *TI = CE->getTypeInfoAsWritten(); 219209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall QualType T = TI->getType(); 220209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 221209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // We really do want to use the non-canonical type here. 222209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall if (T == Context.VoidPtrTy) { 223209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall PointerTypeLoc TL = cast<PointerTypeLoc>(TI->getTypeLoc()); 224209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 225209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall Diag(Loc, diag::warn_unused_voidptr) 226209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall << FixItHint::CreateRemoval(TL.getStarLoc()); 227209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall return; 228209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 229209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 230209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 231351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek DiagRuntimeBehavior(Loc, 0, PDiag(DiagID) << R1 << R2); 232636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson} 233636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 234625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenkovoid Sema::ActOnStartOfCompoundStmt() { 235625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko PushCompoundScope(); 236625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko} 237625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 238625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenkovoid Sema::ActOnFinishOfCompoundStmt() { 239625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko PopCompoundScope(); 240625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko} 241625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 242625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenkosema::CompoundScopeInfo &Sema::getCurCompoundScope() const { 243625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko return getCurFunction()->CompoundScopes.back(); 244625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko} 245625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 24660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2471b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 248a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 249a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 250a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 251c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 252c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 2534e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().C99 && !getLangOpts().CPlusPlus) { 254c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 255c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 256c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 257c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 258c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 259c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 260c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 261c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 262c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 2631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 264c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 2654afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 266c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 267c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 268c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 26998414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 27098414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 271636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson // Ignore statements that are last in a statement expression. 272636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (isStmtExpr && i == NumElts - 1) 27398414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 2741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 275636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson DiagnoseUnusedExprResult(Elts[i]); 27698414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 277a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 278625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko // Check for suspicious empty body (null statement) in `for' and `while' 279625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko // statements. Don't do anything for template instantiations, this just adds 280625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko // noise. 281625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko if (NumElts != 0 && !CurrentInstantiationScope && 282625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko getCurCompoundScope().HasEmptyLoopBodies) { 283625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko for (unsigned i = 0; i != NumElts - 1; ++i) 284625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko DiagnoseEmptyLoopBody(Elts[i], Elts[i + 1]); 285625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko } 286625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 2878189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 29060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2919ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2929ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation DotDotDotLoc, Expr *RHSVal, 29324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 2949ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert((LHSVal != 0) && "missing expression in case statement"); 295117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 2968ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith if (getCurFunction()->SwitchStack.empty()) { 2978ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Diag(CaseLoc, diag::err_case_not_in_switch); 29824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 2998ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3014e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().CPlusPlus0x) { 3028ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // C99 6.8.4.2p3: The expression shall be an integer constant. 3038ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // However, GCC allows any evaluatable integer expression. 304282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith if (!LHSVal->isTypeDependent() && !LHSVal->isValueDependent()) { 305282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith LHSVal = VerifyIntegerConstantExpression(LHSVal).take(); 306282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith if (!LHSVal) 307282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith return StmtError(); 308282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith } 309117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 3108ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // GCC extension: The expression shall be an integer constant. 311117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 312282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith if (RHSVal && !RHSVal->isTypeDependent() && !RHSVal->isValueDependent()) { 313282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith RHSVal = VerifyIntegerConstantExpression(RHSVal).take(); 314282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith // Recover from an error by just forgetting about it. 3158ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 3168a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 318dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc, DotDotDotLoc, 319dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ColonLoc); 320781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(CS); 321117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 32424e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 3259ae2f076ca5ab1feb3ba95629099ec2319833701John McCallvoid Sema::ActOnCaseStmtBody(Stmt *caseStmt, Stmt *SubStmt) { 3265440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth DiagnoseUnusedExprResult(SubStmt); 3275440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth 32824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 32924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 33024e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 33124e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 33260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 3331eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 3349ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SubStmt, Scope *CurScope) { 3355440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth DiagnoseUnusedExprResult(SubStmt); 3365440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth 337781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 3380fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 339117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 3400fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 341117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 342dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, ColonLoc, SubStmt); 343781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(DS); 344117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 3455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 34760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 34857ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerSema::ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 34957ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation ColonLoc, Stmt *SubStmt) { 350ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // If the label was multiply defined, reject it now. 351ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner if (TheDecl->getStmt()) { 352ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << TheDecl->getDeclName(); 353ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(TheDecl->getLocation(), diag::note_previous_definition); 354de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 3555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 356de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 357ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // Otherwise, things are good. Fill in the declaration and return it. 358ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner LabelStmt *LS = new (Context) LabelStmt(IdentLoc, TheDecl, SubStmt); 359ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setStmt(LS); 360203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara if (!TheDecl->isGnuLocal()) 361203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara TheDecl->setLocation(IdentLoc); 362ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(LS); 3635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 365534986f2b21e6050bf00163cd6423fd92155a6edRichard SmithStmtResult Sema::ActOnAttributedStmt(SourceLocation AttrLoc, 366534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith const AttrVec &Attrs, 367534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith Stmt *SubStmt) { 368534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith // Fill in the declaration and return it. Variable length will require to 369534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith // change this to AttributedStmt::Create(Context, ....); 370534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith // and probably using ArrayRef 371534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith AttributedStmt *LS = new (Context) AttributedStmt(AttrLoc, Attrs, SubStmt); 372534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith return Owned(LS); 373534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith} 374534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith 37560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 376d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, Decl *CondVar, 37744aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *thenStmt, SourceLocation ElseLoc, 37844aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *elseStmt) { 37960d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(CondVal.release()); 3801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3818cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor VarDecl *ConditionVar = 0; 382d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 383d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 384586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, IfLoc, true); 38599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 38699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 3878cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor } 38899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 38999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 39099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 391dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 392754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(thenStmt); 3935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3949ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!elseStmt) { 395625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko DiagnoseEmptyStmtBody(ConditionExpr->getLocEnd(), thenStmt, 396625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko diag::warn_empty_if_body); 3972d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 3982d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 399754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(elseStmt); 4001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 401dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) IfStmt(Context, IfLoc, ConditionVar, ConditionExpr, 40244aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis thenStmt, ElseLoc, elseStmt)); 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 405f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 406f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 407f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 408f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 409f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, 411f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 412f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 413f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 414f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 4159f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(NewWidth); 416f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 417f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor 418f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // If the input was signed and negative and the output is 419f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // unsigned, don't bother to warn: this is implementation-defined 420f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // behavior. 421f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 422f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 423f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 424f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 4259f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.trunc(NewWidth); 426b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 4279f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.extend(Val.getBitWidth()); 428b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 429f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 430d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 4311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 432f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 433f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 4349f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(NewWidth); 435b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 436f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 437f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 438f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 439dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // We don't diagnose this overflow, because it is implementation-defined 4402853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // behavior. 4412853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 442f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 443f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 444f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 445f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 446f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 4470471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 4480471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 4490471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 4500471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 4510471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 4520471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 4530e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 4540e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 4550e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 4560e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 4570471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 4580471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 4590471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 4600471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 4610471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 4620471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 4630471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 464764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 465764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 466764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 467764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 468764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 469764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 470764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 471764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 472764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 473764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 474764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 475764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 476764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 477764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 478ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// CmpEnumVals - Comparison predicate for sorting enumeration values. 479ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 480ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool CmpEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 481ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 482ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 483ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first < rhs.first; 484ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 485ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 486ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// EqEnumVals - Comparison preficate for uniqing enumeration values. 487ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 488ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool EqEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 489ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 490ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 491ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first == rhs.first; 492ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 493ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 4945f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// GetTypeBeforeIntegralPromotion - Returns the pre-promotion type of 4955f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// potentially integral-promoted expression @p expr. 496a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCallstatic QualType GetTypeBeforeIntegralPromotion(Expr *&expr) { 497a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(expr)) 498a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall expr = cleanups->getSubExpr(); 499a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall while (ImplicitCastExpr *impcast = dyn_cast<ImplicitCastExpr>(expr)) { 500a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (impcast->getCastKind() != CK_IntegralCast) break; 501a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall expr = impcast->getSubExpr(); 5025f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 5035f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return expr->getType(); 5045f04881eb025f61396d0555d8173730fe2759e0aChris Lattner} 5055f04881eb025f61396d0555d8173730fe2759e0aChris Lattner 50660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 507dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, Expr *Cond, 508d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall Decl *CondVar) { 50960d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult; 5109ae2f076ca5ab1feb3ba95629099ec2319833701John McCall 511586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor VarDecl *ConditionVar = 0; 512d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 513d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 5149ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult = CheckConditionVariable(ConditionVar, SourceLocation(), false); 5159ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 516586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 517dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 5189ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.release(); 519586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 520dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 5219ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Cond) 522586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 523dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 5249ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult 525ceccab908bd7824751b1def127272ec04dd4732bEli Friedman = ConvertToIntegralOrEnumerationType(SwitchLoc, Cond, 526c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_typecheck_statement_requires_integer), 527c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_incomplete_class_type) 5289ae2f076ca5ab1feb3ba95629099ec2319833701John McCall << Cond->getSourceRange(), 529c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_explicit_conversion), 530c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::note_switch_conversion), 531c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_multiple_conversions), 5326bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(diag::note_switch_conversion), 533f39aec17b89f8f0dd78e78c50ad2fa08f12272e3Richard Smith PDiag(0), 534f39aec17b89f8f0dd78e78c50ad2fa08f12272e3Richard Smith /*AllowScopedEnumerations*/ true); 5359ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) return StmtError(); 5369ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 537dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 538a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 539a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall CondResult = UsualUnaryConversions(Cond); 540a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (CondResult.isInvalid()) return StmtError(); 541a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall Cond = CondResult.take(); 542a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall 543d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (!CondVar) { 544b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, SwitchLoc); 5454765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall CondResult = MaybeCreateExprWithCleanups(Cond); 5469ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 547586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 5489ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 549586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 550b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 551781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchIntoScope(); 552dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 5539ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = new (Context) SwitchStmt(Context, ConditionVar, Cond); 554781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.push_back(SS); 555586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return Owned(SS); 5567e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner} 5577e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner 55828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greifstatic void AdjustAPSInt(llvm::APSInt &Val, unsigned BitWidth, bool IsSigned) { 55928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif if (Val.getBitWidth() < BitWidth) 5609f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(BitWidth); 56128164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif else if (Val.getBitWidth() > BitWidth) 5629f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(BitWidth); 56328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Val.setIsSigned(IsSigned); 56428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif} 56528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif 56660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 5679ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, Stmt *Switch, 5689ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *BodyStmt) { 5699ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = cast<SwitchStmt>(Switch); 570781472fe99a120098c631b0cbe33c89f8cef5e70John McCall assert(SS == getCurFunction()->SwitchStack.back() && 571781472fe99a120098c631b0cbe33c89f8cef5e70John McCall "switch stack missing push/pop!"); 572de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 5739dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 574781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.pop_back(); 575c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 576f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 577a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (!CondExpr) return StmtError(); 578de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 579a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor QualType CondType = CondExpr->getType(); 580a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall 581a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall Expr *CondExprBeforePromotion = CondExpr; 582a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall QualType CondTypeBeforePromotion = 583a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall GetTypeBeforeIntegralPromotion(CondExprBeforePromotion); 58484fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor 5855f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // C++ 6.4.2.p2: 5865f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // Integral promotions are performed (on the switch condition). 5875f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // 5885f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // A case value unrepresentable by the original switch condition 5895f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // type (before the promotion) doesn't make sense, even when it can 5905f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // be represented by the promoted type. Therefore we need to find 5915f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // the pre-promotion type of the switch condition. 59212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondExpr->isTypeDependent()) { 593acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // We have already converted the expression to an integral or enumeration 594dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // type, when we started the switch statement. If we don't have an 595acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // appropriate type now, just return an error. 596acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor if (!CondType->isIntegralOrEnumerationType()) 59712356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan return StmtError(); 59812356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan 5992b334bb3126a67895813e49e6228dad4aec0b4d6Chris Lattner if (CondExpr->isKnownToHaveBooleanValue()) { 60012356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(bool_expr) {...} is often a programmer error, e.g. 60112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(n && mask) { ... } // Doh - should be "n & mask". 60212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // One can always use an if statement instead of switch(bool_expr). 60312356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::warn_bool_switch_condition) 60412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondExpr->getSourceRange(); 60512356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 606c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 607de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 608f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 609f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 6101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HasDependentValue 611dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 6121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned CondWidth 6131d6ab7af99a1fc059a6aa5da083640c1d94b07f7Chris Lattner = HasDependentValue ? 0 : Context.getIntWidth(CondTypeBeforePromotion); 614575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool CondIsSigned 615575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor = CondTypeBeforePromotion->isSignedIntegerOrEnumerationType(); 6161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 617f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 618f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 619f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 6205f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner typedef SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 6210471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 6221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 623f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 624ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRangesTy; 625ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy CaseRanges; 6261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 627f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 6281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 629b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 6301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 631dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 632c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 6331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 634c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 635f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 636f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 6375f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 638de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 639f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 640390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 641390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 642390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 643b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 644c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 645f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 6461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 647f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 648f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 6491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6501e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 651dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 652dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 653dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 654dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 655dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6578ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith llvm::APSInt LoVal; 6581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6594e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().CPlusPlus0x) { 6608ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // C++11 [stmt.switch]p2: the constant-expression shall be a converted 6618ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // constant expression of the promoted type of the switch condition. 6628ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith ExprResult ConvLo = 6638ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith CheckConvertedConstantExpression(Lo, CondType, LoVal, CCEK_CaseValue); 6648ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith if (ConvLo.isInvalid()) { 6658ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith CaseListIsErroneous = true; 6668ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith continue; 6678ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 6688ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Lo = ConvLo.take(); 6698ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } else { 6708ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // We already verified that the expression has a i-c-e value (C99 6718ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // 6.8.4.2p3) - get that value now. 6728ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith LoVal = Lo->EvaluateKnownConstInt(Context); 6738ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith 6748ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // If the LHS is not the same type as the condition, insert an implicit 6758ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // cast. 6768ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Lo = DefaultLvalueConversion(Lo).take(); 6778ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Lo = ImpCastExprToType(Lo, CondType, CK_IntegralCast).take(); 6788ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 6798ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith 6808ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // Convert the value to the same width/sign as the condition had prior to 6818ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // integral promotions. 6828ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // 6838ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // FIXME: This causes us to reject valid code: 6848ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // switch ((char)c) { case 256: case 0: return 0; } 6858ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // Here we claim there is a duplicated condition value, but there is not. 686f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 68728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Lo->getLocStart(), 688f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 6896c36be5b383875b490684bcf439d6d427298c1afChris Lattner 6901e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 6911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 692b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 693dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 6941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CS->getRHS()->isTypeDependent() || 695dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 696dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 697dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 698dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 699f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 7001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 701b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 702f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 703f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 704b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 705dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 7060fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // If we don't have a default statement, check whether the 7070fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // condition is constant. 7080fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt ConstantCondValue; 7090fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool HasConstantCond = false; 7100fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!HasDependentValue && !TheDefaultStmt) { 71151f4708c00110940ca3f337961915f2ca1668375Richard Smith HasConstantCond 71280d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith = CondExprBeforePromotion->EvaluateAsInt(ConstantCondValue, Context, 71380d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith Expr::SE_AllowSideEffects); 71480d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith assert(!HasConstantCond || 71580d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith (ConstantCondValue.getBitWidth() == CondWidth && 71680d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith ConstantCondValue.isSigned() == CondIsSigned)); 7170fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 71880d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith bool ShouldCheckConstantCond = HasConstantCond; 7190fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 720dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 721dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 722dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 723dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 7240fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (unsigned i = 0, e = CaseVals.size(); i != e; ++i) { 7250fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 7260fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CaseVals[i].first == ConstantCondValue) 7270fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 7280fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7290fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (i != 0 && CaseVals[i].first == CaseVals[i-1].first) { 730dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 7311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(CaseVals[i].second->getLHS()->getLocStart(), 7320fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall diag::err_duplicate_case) << CaseVals[i].first.toString(10); 7330fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CaseVals[i-1].second->getLHS()->getLocStart(), 734dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 735390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 736390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 737dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 738dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7396efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 740b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 7411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 742dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 743dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 744dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 745dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 746dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 747dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 7481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 749dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 750dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 751dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 7520fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt &LoVal = CaseRanges[i].first; 753dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 754dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 7558ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith llvm::APSInt HiVal; 7568ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith 7574e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().CPlusPlus0x) { 7588ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // C++11 [stmt.switch]p2: the constant-expression shall be a converted 7598ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // constant expression of the promoted type of the switch condition. 7608ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith ExprResult ConvHi = 7618ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith CheckConvertedConstantExpression(Hi, CondType, HiVal, 7628ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith CCEK_CaseValue); 7638ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith if (ConvHi.isInvalid()) { 7648ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith CaseListIsErroneous = true; 7658ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith continue; 7668ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 7678ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Hi = ConvHi.take(); 7688ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } else { 7698ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith HiVal = Hi->EvaluateKnownConstInt(Context); 7708ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith 7718ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // If the RHS is not the same type as the condition, insert an 7728ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // implicit cast. 7738ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Hi = DefaultLvalueConversion(Hi).take(); 7748ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Hi = ImpCastExprToType(Hi, CondType, CK_IntegralCast).take(); 7758ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 7761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 777dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 778dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 77928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocStart(), 780dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 7811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 782dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 7831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 784dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 7850fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (LoVal > HiVal) { 786dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 787dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 78828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocEnd()); 789dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 790dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 791dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 792dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7930fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7940fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 7950fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall LoVal <= ConstantCondValue && 7960fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue <= HiVal) 7970fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 7980fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 799dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 8000471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 8011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 802dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 803dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 804dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 805dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 806dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 807dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 808dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 8091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 810dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 811dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 812dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 813dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 8141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 815dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 816dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 817dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 818dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 819dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 820dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 821dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 822dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 823dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 8241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 825dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 826dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 827dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 828dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 829dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 830dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 8311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 832dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 833dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 834dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 835dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 836dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 837dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 8381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 839dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 840dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 841dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 842dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 8431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(OverlapStmt->getLHS()->getLocStart(), 844dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 845390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 846390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 847dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 848dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 8490471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 850b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 851ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 8520fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Complain if we have a constant condition and we didn't find a match. 8530fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!CaseListIsErroneous && ShouldCheckConstantCond) { 8540fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // TODO: it would be nice if we printed enums as enums, chars as 8550fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // chars, etc. 8560fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CondExpr->getExprLoc(), diag::warn_missing_case_for_condition) 8570fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ConstantCondValue.toString(10) 8580fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << CondExpr->getSourceRange(); 8590fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 8600fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 8610fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Check to see if switch is over an Enum and handles all of its 862559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // values. We only issue a warning if there is not 'default:', but 863559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // we still do the analysis to preserve this information in the AST 864559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // (which can be used by flow-based analyes). 8650fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // 866ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner const EnumType *ET = CondTypeBeforePromotion->getAs<EnumType>(); 867559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 868ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // If switch has default case, then ignore it. 869559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!CaseListIsErroneous && !HasConstantCond && ET) { 870ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const EnumDecl *ED = ET->getDecl(); 8715f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner typedef SmallVector<std::pair<llvm::APSInt, EnumConstantDecl*>, 64> 87258f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet EnumValsTy; 873ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy EnumVals; 874ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 8750fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Gather all enum values, set their type and sort them, 8760fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // allowing easier comparison with CaseVals. 8770fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (EnumDecl::enumerator_iterator EDI = ED->enumerator_begin(); 87828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EDI != ED->enumerator_end(); ++EDI) { 87928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif llvm::APSInt Val = EDI->getInitVal(); 88028164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Val, CondWidth, CondIsSigned); 881262bc18e32500558af7cb0afa205b34bd37bafedDavid Blaikie EnumVals.push_back(std::make_pair(Val, &*EDI)); 882ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 883ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor std::stable_sort(EnumVals.begin(), EnumVals.end(), CmpEnumVals); 8840fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall EnumValsTy::iterator EIend = 8850fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall std::unique(EnumVals.begin(), EnumVals.end(), EqEnumVals); 886559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 887559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // See which case values aren't in enum. 8889366750a5a97c8aeae1df4898ea849b087865195David Blaikie EnumValsTy::const_iterator EI = EnumVals.begin(); 8899366750a5a97c8aeae1df4898ea849b087865195David Blaikie for (CaseValsTy::const_iterator CI = CaseVals.begin(); 8909366750a5a97c8aeae1df4898ea849b087865195David Blaikie CI != CaseVals.end(); CI++) { 8919366750a5a97c8aeae1df4898ea849b087865195David Blaikie while (EI != EIend && EI->first < CI->first) 8929366750a5a97c8aeae1df4898ea849b087865195David Blaikie EI++; 8939366750a5a97c8aeae1df4898ea849b087865195David Blaikie if (EI == EIend || EI->first > CI->first) 8949366750a5a97c8aeae1df4898ea849b087865195David Blaikie Diag(CI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 89554faba4f7f3f0e8f1376da1c459312596ad5486dFariborz Jahanian << CondTypeBeforePromotion; 8969366750a5a97c8aeae1df4898ea849b087865195David Blaikie } 8979366750a5a97c8aeae1df4898ea849b087865195David Blaikie // See which of case ranges aren't in enum 8989366750a5a97c8aeae1df4898ea849b087865195David Blaikie EI = EnumVals.begin(); 8999366750a5a97c8aeae1df4898ea849b087865195David Blaikie for (CaseRangesTy::const_iterator RI = CaseRanges.begin(); 9009366750a5a97c8aeae1df4898ea849b087865195David Blaikie RI != CaseRanges.end() && EI != EIend; RI++) { 9019366750a5a97c8aeae1df4898ea849b087865195David Blaikie while (EI != EIend && EI->first < RI->first) 9029366750a5a97c8aeae1df4898ea849b087865195David Blaikie EI++; 9039366750a5a97c8aeae1df4898ea849b087865195David Blaikie 9049366750a5a97c8aeae1df4898ea849b087865195David Blaikie if (EI == EIend || EI->first != RI->first) { 9059366750a5a97c8aeae1df4898ea849b087865195David Blaikie Diag(RI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 90654faba4f7f3f0e8f1376da1c459312596ad5486dFariborz Jahanian << CondTypeBeforePromotion; 90747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 908e0ba9d1beeba01a96808c2fc61f9ca89acec313bTed Kremenek 9099366750a5a97c8aeae1df4898ea849b087865195David Blaikie llvm::APSInt Hi = 9109366750a5a97c8aeae1df4898ea849b087865195David Blaikie RI->second->getRHS()->EvaluateKnownConstInt(Context); 9119366750a5a97c8aeae1df4898ea849b087865195David Blaikie AdjustAPSInt(Hi, CondWidth, CondIsSigned); 9129366750a5a97c8aeae1df4898ea849b087865195David Blaikie while (EI != EIend && EI->first < Hi) 9139366750a5a97c8aeae1df4898ea849b087865195David Blaikie EI++; 9149366750a5a97c8aeae1df4898ea849b087865195David Blaikie if (EI == EIend || EI->first != Hi) 9159366750a5a97c8aeae1df4898ea849b087865195David Blaikie Diag(RI->second->getRHS()->getExprLoc(), diag::warn_not_in_enum) 91654faba4f7f3f0e8f1376da1c459312596ad5486dFariborz Jahanian << CondTypeBeforePromotion; 917ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 918dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 919559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Check which enum vals aren't in switch 920ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseValsTy::const_iterator CI = CaseVals.begin(); 921ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy::const_iterator RI = CaseRanges.begin(); 922559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek bool hasCasesNotInSwitch = false; 923559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 9245f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeclarationName,8> UnhandledNames; 925dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9269366750a5a97c8aeae1df4898ea849b087865195David Blaikie for (EI = EnumVals.begin(); EI != EIend; EI++){ 927ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Drop unneeded case values 928ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt CIVal; 929ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (CI != CaseVals.end() && CI->first < EI->first) 930ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CI++; 931dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 932ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (CI != CaseVals.end() && CI->first == EI->first) 933ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor continue; 934ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 935559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Drop unneeded case ranges 936ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (; RI != CaseRanges.end(); RI++) { 937a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith llvm::APSInt Hi = 938a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith RI->second->getRHS()->EvaluateKnownConstInt(Context); 93928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 940ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI->first <= Hi) 941ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor break; 942ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 943ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 944559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (RI == CaseRanges.end() || EI->first < RI->first) { 94547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek hasCasesNotInSwitch = true; 94631ceb61172bca7ebc3fb90e9125864c7a29c55c0David Blaikie UnhandledNames.push_back(EI->second->getDeclName()); 94747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 948ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 949dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 950585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie if (TheDefaultStmt && UnhandledNames.empty()) 951585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie Diag(TheDefaultStmt->getDefaultLoc(), diag::warn_unreachable_default); 95231ceb61172bca7ebc3fb90e9125864c7a29c55c0David Blaikie 953ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Produce a nice diagnostic if multiple values aren't handled. 954ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner switch (UnhandledNames.size()) { 955ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 0: break; 956ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 1: 957585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie Diag(CondExpr->getExprLoc(), TheDefaultStmt 958585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie ? diag::warn_def_missing_case1 : diag::warn_missing_case1) 959ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0]; 960ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 961ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 2: 962585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie Diag(CondExpr->getExprLoc(), TheDefaultStmt 963585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie ? diag::warn_def_missing_case2 : diag::warn_missing_case2) 964ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1]; 965ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 966ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 3: 967585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie Diag(CondExpr->getExprLoc(), TheDefaultStmt 968585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie ? diag::warn_def_missing_case3 : diag::warn_missing_case3) 969ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 970ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 971ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner default: 972585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie Diag(CondExpr->getExprLoc(), TheDefaultStmt 973585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie ? diag::warn_def_missing_cases : diag::warn_missing_cases) 974ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << (unsigned)UnhandledNames.size() 975ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 976ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 977ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner } 978559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 979559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!hasCasesNotInSwitch) 98047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek SS->setAllEnumCasesCovered(); 981ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 982b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 983dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 984625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko DiagnoseEmptyStmtBody(CondExpr->getLocEnd(), BodyStmt, 985625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko diag::warn_empty_switch_body); 986625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 987390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 988390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 989b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 990de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 991de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 992de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 9935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 99560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 996dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, 9979ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Decl *CondVar, Stmt *Body) { 99860d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(Cond.release()); 999dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 10005656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor VarDecl *ConditionVar = 0; 1001d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 1002d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 1003586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, WhileLoc, true); 100499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 100599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 10065656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor } 10079ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *ConditionExpr = CondResult.take(); 100899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 100999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 1010dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 10119ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 10121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1013625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko if (isa<NullStmt>(Body)) 1014625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko getCurCompoundScope().setHasEmptyLoopBodies(); 1015625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 101643dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor return Owned(new (Context) WhileStmt(Context, ConditionVar, ConditionExpr, 10179ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Body, WhileLoc)); 10185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 102060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 10219ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1022989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 10239ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Cond, SourceLocation CondRParen) { 10249ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert(Cond && "ActOnDoStmt(): missing expression"); 1025f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 1026429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult CondResult = CheckBooleanCondition(Cond, DoLoc); 1027429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (CondResult.isInvalid() || CondResult.isInvalid()) 10285a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 1029429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Cond = CondResult.take(); 10305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1031b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, DoLoc); 1032429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CondResult = MaybeCreateExprWithCleanups(Cond); 10339ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 1034586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 10359ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 1036dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 10379ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 1038754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 10399ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) DoStmt(Body, Cond, DoLoc, WhileLoc, CondRParen)); 10405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1042694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieunamespace { 1043694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // This visitor will traverse a conditional statement and store all 1044694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // the evaluated decls into a vector. Simple is set to true if none 1045694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // of the excluded constructs are used. 1046694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu class DeclExtractor : public EvaluatedExprVisitor<DeclExtractor> { 1047694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu llvm::SmallPtrSet<VarDecl*, 8> &Decls; 1048694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu llvm::SmallVector<SourceRange, 10> &Ranges; 1049694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu bool Simple; 1050694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu PartialDiagnostic &PDiag; 1051694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieupublic: 1052694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu typedef EvaluatedExprVisitor<DeclExtractor> Inherited; 1053694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1054694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu DeclExtractor(Sema &S, llvm::SmallPtrSet<VarDecl*, 8> &Decls, 1055694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu llvm::SmallVector<SourceRange, 10> &Ranges, 1056694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu PartialDiagnostic &PDiag) : 1057694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Inherited(S.Context), 1058694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Decls(Decls), 1059694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Ranges(Ranges), 1060694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Simple(true), 1061694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu PDiag(PDiag) {} 1062694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1063694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu bool isSimple() { return Simple; } 1064694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1065694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // Replaces the method in EvaluatedExprVisitor. 1066694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitMemberExpr(MemberExpr* E) { 1067694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Simple = false; 1068694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1069694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1070694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // Any Stmt not whitelisted will cause the condition to be marked complex. 1071694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitStmt(Stmt *S) { 1072694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Simple = false; 1073694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1074694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1075694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitBinaryOperator(BinaryOperator *E) { 1076694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getLHS()); 1077694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getRHS()); 1078694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1079694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1080694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitCastExpr(CastExpr *E) { 1081694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getSubExpr()); 1082694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1083694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1084694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitUnaryOperator(UnaryOperator *E) { 1085694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // Skip checking conditionals with derefernces. 1086694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (E->getOpcode() == UO_Deref) 1087694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Simple = false; 1088694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu else 1089694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getSubExpr()); 1090694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1091694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1092694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitConditionalOperator(ConditionalOperator *E) { 1093694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getCond()); 1094694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getTrueExpr()); 1095694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getFalseExpr()); 1096694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1097694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1098694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitParenExpr(ParenExpr *E) { 1099694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getSubExpr()); 1100694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1101694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1102694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitBinaryConditionalOperator(BinaryConditionalOperator *E) { 1103694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getOpaqueValue()->getSourceExpr()); 1104694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getFalseExpr()); 1105694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1106694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1107694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitIntegerLiteral(IntegerLiteral *E) { } 1108694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitFloatingLiteral(FloatingLiteral *E) { } 1109694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *E) { } 1110694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitCharacterLiteral(CharacterLiteral *E) { } 1111694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitGNUNullExpr(GNUNullExpr *E) { } 1112694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitImaginaryLiteral(ImaginaryLiteral *E) { } 1113694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1114694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitDeclRefExpr(DeclRefExpr *E) { 1115694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu VarDecl *VD = dyn_cast<VarDecl>(E->getDecl()); 1116694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (!VD) return; 1117694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1118694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Ranges.push_back(E->getSourceRange()); 1119694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1120694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Decls.insert(VD); 1121694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1122694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1123694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu }; // end class DeclExtractor 1124694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1125694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // DeclMatcher checks to see if the decls are used in a non-evauluated 1126694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // context. 1127694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu class DeclMatcher : public EvaluatedExprVisitor<DeclMatcher> { 1128694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu llvm::SmallPtrSet<VarDecl*, 8> &Decls; 1129694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu bool FoundDecl; 1130694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu //bool EvalDecl; 1131694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1132694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieupublic: 1133694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu typedef EvaluatedExprVisitor<DeclMatcher> Inherited; 1134694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1135694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu DeclMatcher(Sema &S, llvm::SmallPtrSet<VarDecl*, 8> &Decls, Stmt *Statement) : 1136694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Inherited(S.Context), Decls(Decls), FoundDecl(false) { 1137694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (!Statement) return; 1138694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1139694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(Statement); 1140694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1141694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1142694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitReturnStmt(ReturnStmt *S) { 1143694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu FoundDecl = true; 1144694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1145694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1146694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitBreakStmt(BreakStmt *S) { 1147694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu FoundDecl = true; 1148694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1149694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1150694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitGotoStmt(GotoStmt *S) { 1151694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu FoundDecl = true; 1152694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1153694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1154694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitCastExpr(CastExpr *E) { 1155694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (E->getCastKind() == CK_LValueToRValue) 1156694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu CheckLValueToRValueCast(E->getSubExpr()); 1157694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu else 1158694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E->getSubExpr()); 1159694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1160694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1161694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void CheckLValueToRValueCast(Expr *E) { 1162694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu E = E->IgnoreParenImpCasts(); 1163694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1164694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (isa<DeclRefExpr>(E)) { 1165694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu return; 1166694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1167694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1168694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) { 1169694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(CO->getCond()); 1170694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu CheckLValueToRValueCast(CO->getTrueExpr()); 1171694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu CheckLValueToRValueCast(CO->getFalseExpr()); 1172694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu return; 1173694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1174694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1175694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (BinaryConditionalOperator *BCO = 1176694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu dyn_cast<BinaryConditionalOperator>(E)) { 1177694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu CheckLValueToRValueCast(BCO->getOpaqueValue()->getSourceExpr()); 1178694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu CheckLValueToRValueCast(BCO->getFalseExpr()); 1179694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu return; 1180694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1181694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1182694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Visit(E); 1183694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1184694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1185694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void VisitDeclRefExpr(DeclRefExpr *E) { 1186694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (VarDecl *VD = dyn_cast<VarDecl>(E->getDecl())) 1187694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (Decls.count(VD)) 1188694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu FoundDecl = true; 1189694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1190694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1191694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu bool FoundDeclInUse() { return FoundDecl; } 1192694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1193694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu }; // end class DeclMatcher 1194694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1195694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu void CheckForLoopConditionalStatement(Sema &S, Expr *Second, 1196694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Expr *Third, Stmt *Body) { 1197694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // Condition is empty 1198694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (!Second) return; 1199694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1200694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (S.Diags.getDiagnosticLevel(diag::warn_variables_not_in_loop_body, 1201694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu Second->getLocStart()) 1202694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu == DiagnosticsEngine::Ignored) 1203694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu return; 1204694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1205694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu PartialDiagnostic PDiag = S.PDiag(diag::warn_variables_not_in_loop_body); 1206694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu llvm::SmallPtrSet<VarDecl*, 8> Decls; 1207694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu llvm::SmallVector<SourceRange, 10> Ranges; 1208694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu DeclExtractor DE(S, Decls, Ranges, PDiag); 1209694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu DE.Visit(Second); 1210694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1211694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // Don't analyze complex conditionals. 1212694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (!DE.isSimple()) return; 1213694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1214694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // No decls found. 1215694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (Decls.size() == 0) return; 1216694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 12179087599e5ee64ecd30194b3d89f8748ac95c62f7Richard Trieu // Don't warn on volatile, static, or global variables. 1218694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu for (llvm::SmallPtrSet<VarDecl*, 8>::iterator I = Decls.begin(), 1219694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu E = Decls.end(); 1220694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu I != E; ++I) 12219087599e5ee64ecd30194b3d89f8748ac95c62f7Richard Trieu if ((*I)->getType().isVolatileQualified() || 12229087599e5ee64ecd30194b3d89f8748ac95c62f7Richard Trieu (*I)->hasGlobalStorage()) return; 1223694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1224694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (DeclMatcher(S, Decls, Second).FoundDeclInUse() || 1225694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu DeclMatcher(S, Decls, Third).FoundDeclInUse() || 1226694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu DeclMatcher(S, Decls, Body).FoundDeclInUse()) 1227694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu return; 1228694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1229694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // Load decl names into diagnostic. 1230694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (Decls.size() > 4) 1231694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu PDiag << 0; 1232694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu else { 1233694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu PDiag << Decls.size(); 1234694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu for (llvm::SmallPtrSet<VarDecl*, 8>::iterator I = Decls.begin(), 1235694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu E = Decls.end(); 1236694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu I != E; ++I) 1237694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu PDiag << (*I)->getDeclName(); 1238694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1239694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1240694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // Load SourceRanges into diagnostic if there is room. 1241694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu // Otherwise, load the SourceRange of the conditional expression. 1242694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu if (Ranges.size() <= PartialDiagnostic::MaxArguments) 1243694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu for (llvm::SmallVector<SourceRange, 10>::iterator I = Ranges.begin(), 1244694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu E = Ranges.end(); 1245694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu I != E; ++I) 1246694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu PDiag << *I; 1247694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu else 1248694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu PDiag << Second->getSourceRange(); 1249694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1250694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu S.Diag(Ranges.begin()->getBegin(), PDiag); 1251694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu } 1252694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 1253694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu} // end namespace 1254694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 125560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1256f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 12579ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, FullExprArg second, Decl *secondVar, 125899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor FullExprArg third, 12599ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 12604e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().CPlusPlus) { 12615921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 1262f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 1263f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 1264f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 12655921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 12665921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 12675921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 1268b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD && VD->isLocalVarDecl() && !VD->hasLocalStorage()) 12695921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 12705921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 12715921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 12725921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 12735921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 1274ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 12755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 127699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 1277694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu CheckForLoopConditionalStatement(*this, second.get(), third.get(), Body); 1278694e796f462748ab4dc7ecdf4be5da44dd2c8c94Richard Trieu 127960d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult SecondResult(second.release()); 128099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor VarDecl *ConditionVar = 0; 1281d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (secondVar) { 1282d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(secondVar); 1283586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor SecondResult = CheckConditionVariable(ConditionVar, ForLoc, true); 128499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (SecondResult.isInvalid()) 128599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 128699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor } 1287dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 128899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Third = third.release().takeAs<Expr>(); 1289dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 12903af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(First); 12913af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(Third); 1292754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(Body); 1293754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 1294625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko if (isa<NullStmt>(Body)) 1295625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko getCurCompoundScope().setHasEmptyLoopBodies(); 1296625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 1297dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) ForStmt(Context, First, 1298dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi SecondResult.take(), ConditionVar, 1299dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Third, Body, ForLoc, LParenLoc, 130043dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor RParenLoc)); 13015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 13025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1303f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// In an Objective C collection iteration statement: 1304f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// for (x in y) 1305f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// x can be an arbitrary l-value expression. Bind it up as a 1306f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// full-expression. 1307f6a1648197562e0b133440d612d9af297d0a86ccJohn McCallStmtResult Sema::ActOnForEachLValueExpr(Expr *E) { 130829bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall // Reduce placeholder expressions here. Note that this rejects the 130929bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall // use of pseudo-object l-values in this position. 131029bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall ExprResult result = CheckPlaceholderExpr(E); 131129bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall if (result.isInvalid()) return StmtError(); 131229bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall E = result.take(); 131329bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall 1314f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall CheckImplicitConversions(E); 131529bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall 131629bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall result = MaybeCreateExprWithCleanups(E); 131729bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall if (result.isInvalid()) return StmtError(); 131829bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall 131929bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall return Owned(static_cast<Stmt*>(result.take())); 1320f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall} 1321f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall 1322990567cb60e8530ba01b41d4e056e32b44b95ec0John McCallExprResult 1323990567cb60e8530ba01b41d4e056e32b44b95ec0John McCallSema::ActOnObjCForCollectionOperand(SourceLocation forLoc, Expr *collection) { 1324990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall assert(collection); 1325990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1326990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Bail out early if we've got a type-dependent expression. 1327990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (collection->isTypeDependent()) return Owned(collection); 1328990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1329990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Perform normal l-value conversion. 1330990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ExprResult result = DefaultFunctionArrayLvalueConversion(collection); 1331990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (result.isInvalid()) 1332990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return ExprError(); 1333990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall collection = result.take(); 1334990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1335990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // The operand needs to have object-pointer type. 1336990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // TODO: should we do a contextual conversion? 1337990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall const ObjCObjectPointerType *pointerType = 1338990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall collection->getType()->getAs<ObjCObjectPointerType>(); 1339990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!pointerType) 1340990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return Diag(forLoc, diag::err_collection_expr_type) 1341990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall << collection->getType() << collection->getSourceRange(); 1342990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1343990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Check that the operand provides 1344990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // - countByEnumeratingWithState:objects:count: 1345990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall const ObjCObjectType *objectType = pointerType->getObjectType(); 1346990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ObjCInterfaceDecl *iface = objectType->getInterface(); 1347990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1348990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If we have a forward-declared type, we can't do this check. 1349b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor // Under ARC, it is an error not to have a forward-declared class. 1350b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor if (iface && 1351b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor RequireCompleteType(forLoc, QualType(objectType, 0), 13524e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie getLangOpts().ObjCAutoRefCount 1353b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor ? PDiag(diag::err_arc_collection_forward) 1354b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor << collection->getSourceRange() 1355b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor : PDiag(0))) { 1356990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Otherwise, if we have any useful type information, check that 1357990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // the type declares the appropriate method. 1358990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } else if (iface || !objectType->qual_empty()) { 1359990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall IdentifierInfo *selectorIdents[] = { 1360990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("countByEnumeratingWithState"), 1361990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("objects"), 1362990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("count") 1363990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall }; 1364990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Selector selector = Context.Selectors.getSelector(3, &selectorIdents[0]); 1365990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1366990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ObjCMethodDecl *method = 0; 1367990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1368990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If there's an interface, look in both the public and private APIs. 1369990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (iface) { 1370990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall method = iface->lookupInstanceMethod(selector); 1371990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) method = LookupPrivateInstanceMethod(selector, iface); 1372990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1373990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1374990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Also check protocol qualifiers. 1375990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) 1376990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall method = LookupMethodInQualifiedType(selector, pointerType, 1377990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall /*instance*/ true); 1378990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1379990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If we didn't find it anywhere, give up. 1380990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) { 1381990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Diag(forLoc, diag::warn_collection_expr_type) 1382990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall << collection->getType() << selector << collection->getSourceRange(); 1383990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1384990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1385990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // TODO: check for an incompatible signature? 1386990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1387990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1388990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Wrap up any cleanups in the expression. 1389990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return Owned(MaybeCreateExprWithCleanups(collection)); 1390990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall} 1391990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 139260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1393f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 1394f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 13959ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, Expr *Second, 13969ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 139720552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 139820552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 139920552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 14007e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 1401f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 1402f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 1403f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 1404f85e193739c953358c865005855253af4f68a497John McCall VarDecl *D = cast<VarDecl>(DS->getSingleDecl()); 1405f85e193739c953358c865005855253af4f68a497John McCall FirstType = D->getType(); 1406f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 1407f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 1408f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 1409f85e193739c953358c865005855253af4f68a497John McCall if (!D->hasLocalStorage()) 1410f85e193739c953358c865005855253af4f68a497John McCall return StmtError(Diag(D->getLocation(), 1411f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 14121fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 1413c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor Expr *FirstE = cast<Expr>(First); 14147eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (!FirstE->isTypeDependent() && !FirstE->isLValue()) 1415f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 1416f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 1417f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 14181fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 14191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FirstType = static_cast<Expr*>(First)->getType(); 14201fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 1421c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (!FirstType->isDependentType() && 1422c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor !FirstType->isObjCObjectPointerType() && 1423a5e42a82ce055f29f3733f3a1f10da6cb9877deeFariborz Jahanian !FirstType->isBlockPointerType()) 1424dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 1425d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 14263ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 1427990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 14288189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 14298189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 14303ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 14315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1432ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithnamespace { 1433ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1434ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithenum BeginEndFunction { 1435ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_begin, 1436ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_end 1437ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith}; 1438ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1439ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Build a variable declaration for a for-range statement. 1440ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic VarDecl *BuildForRangeVarDecl(Sema &SemaRef, SourceLocation Loc, 1441ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType Type, const char *Name) { 1442ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclContext *DC = SemaRef.CurContext; 1443ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IdentifierInfo *II = &SemaRef.PP.getIdentifierTable().get(Name); 1444ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TypeSourceInfo *TInfo = SemaRef.Context.getTrivialTypeSourceInfo(Type, Loc); 1445ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *Decl = VarDecl::Create(SemaRef.Context, DC, Loc, Loc, II, Type, 1446ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TInfo, SC_Auto, SC_None); 1447b403d6d746239095a2c7bac958c924d92434e2b4Richard Smith Decl->setImplicit(); 1448ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return Decl; 1449ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1450ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1451ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Finish building a variable declaration for a for-range statement. 1452ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// \return true if an error occurs. 1453ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic bool FinishForRangeVarDecl(Sema &SemaRef, VarDecl *Decl, Expr *Init, 1454ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc, int diag) { 1455ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Deduce the type for the iterator variable now rather than leaving it to 1456ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // AddInitializerToDecl, so we can produce a more suitable diagnostic. 1457ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TypeSourceInfo *InitTSI = 0; 145862b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl if ((!isa<InitListExpr>(Init) && Init->getType()->isVoidType()) || 1459b832f6dea893f25b40500a04781286236281cb20Sebastian Redl SemaRef.DeduceAutoType(Decl->getTypeSourceInfo(), Init, InitTSI) == 1460b832f6dea893f25b40500a04781286236281cb20Sebastian Redl Sema::DAR_Failed) 1461ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Loc, diag) << Init->getType(); 1462ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!InitTSI) { 1463ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setInvalidDecl(); 1464ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return true; 1465ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1466ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setTypeSourceInfo(InitTSI); 1467ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setType(InitTSI->getType()); 1468ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1469f85e193739c953358c865005855253af4f68a497John McCall // In ARC, infer lifetime. 1470f85e193739c953358c865005855253af4f68a497John McCall // FIXME: ARC may want to turn this into 'const __unsafe_unretained' if 1471f85e193739c953358c865005855253af4f68a497John McCall // we're doing the equivalent of fast iteration. 14724e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (SemaRef.getLangOpts().ObjCAutoRefCount && 1473f85e193739c953358c865005855253af4f68a497John McCall SemaRef.inferObjCARCLifetime(Decl)) 1474f85e193739c953358c865005855253af4f68a497John McCall Decl->setInvalidDecl(); 1475f85e193739c953358c865005855253af4f68a497John McCall 1476ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.AddInitializerToDecl(Decl, Init, /*DirectInit=*/false, 1477ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TypeMayContainAuto=*/false); 1478ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.FinalizeDeclaration(Decl); 1479b403d6d746239095a2c7bac958c924d92434e2b4Richard Smith SemaRef.CurContext->addHiddenDecl(Decl); 1480ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return false; 1481ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1482ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1483ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Produce a note indicating which begin/end function was implicitly called 1484ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// by a C++0x for-range statement. This is often not obvious from the code, 1485ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// nor from the diagnostics produced when analysing the implicit expressions 1486ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// required in a for-range statement. 1487ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithvoid NoteForRangeBeginEndFunction(Sema &SemaRef, Expr *E, 1488ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndFunction BEF) { 1489ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr *CE = dyn_cast<CallExpr>(E); 1490ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!CE) 1491ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return; 1492ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FunctionDecl *D = dyn_cast<FunctionDecl>(CE->getCalleeDecl()); 1493ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!D) 1494ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return; 1495ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc = D->getLocation(); 1496ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1497ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith std::string Description; 1498ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith bool IsTemplate = false; 1499ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FunctionTemplateDecl *FunTmpl = D->getPrimaryTemplate()) { 1500ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Description = SemaRef.getTemplateArgumentBindingsText( 1501ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FunTmpl->getTemplateParameters(), *D->getTemplateSpecializationArgs()); 1502ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IsTemplate = true; 1503ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1504ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1505ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Loc, diag::note_for_range_begin_end) 1506ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << BEF << IsTemplate << Description << E->getType(); 1507ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1508ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1509ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Build a call to 'begin' or 'end' for a C++0x for-range statement. If the 1510ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// given LookupResult is non-empty, it is assumed to describe a member which 1511ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// will be invoked. Otherwise, the function will be found via argument 1512ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// dependent lookup. 1513ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic ExprResult BuildForRangeBeginEndCall(Sema &SemaRef, Scope *S, 1514ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc, 1515ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *Decl, 1516ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndFunction BEF, 1517ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith const DeclarationNameInfo &NameInfo, 1518ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult &MemberLookup, 1519ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Range) { 1520ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult CallExpr; 1521ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!MemberLookup.empty()) { 1522ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult MemberRef = 1523ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.BuildMemberReferenceExpr(Range, Range->getType(), Loc, 1524ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*IsPtr=*/false, CXXScopeSpec(), 1525e4b92761b43ced611c417ae478568610f1ad7b1eAbramo Bagnara /*TemplateKWLoc=*/SourceLocation(), 1526e4b92761b43ced611c417ae478568610f1ad7b1eAbramo Bagnara /*FirstQualifierInScope=*/0, 1527e4b92761b43ced611c417ae478568610f1ad7b1eAbramo Bagnara MemberLookup, 1528ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TemplateArgs=*/0); 1529ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (MemberRef.isInvalid()) 1530ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1531ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr = SemaRef.ActOnCallExpr(S, MemberRef.get(), Loc, MultiExprArg(), 1532ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Loc, 0); 1533ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CallExpr.isInvalid()) 1534ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1535ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1536ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedSet<0> FoundNames; 1537ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // C++0x [stmt.ranged]p1: For the purposes of this name lookup, namespace 1538ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // std is an associated namespace. 1539ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedLookupExpr *Fn = 1540ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedLookupExpr::Create(SemaRef.Context, /*NamingClass=*/0, 1541ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NestedNameSpecifierLoc(), NameInfo, 1542ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*NeedsADL=*/true, /*Overloaded=*/false, 1543ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FoundNames.begin(), FoundNames.end(), 1544ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*LookInStdNamespace=*/true); 1545ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr = SemaRef.BuildOverloadedCallExpr(S, Fn, Fn, Loc, &Range, 1, Loc, 15463943b1c0215da2a4171dd6c696cb75d19e5a04a9Kaelyn Uhrain 0, /*AllowTypoCorrection=*/false); 1547ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CallExpr.isInvalid()) { 1548ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Range->getLocStart(), diag::note_for_range_type) 1549ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << Range->getType(); 1550ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1551ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1552ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1553ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(SemaRef, Decl, CallExpr.get(), Loc, 1554ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1555ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(SemaRef, CallExpr.get(), BEF); 1556ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1557ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1558ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return CallExpr; 1559ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1560ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1561ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1562ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1563ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// ActOnCXXForRangeStmt - Check and build a C++0x for-range statement. 1564ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1565ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// C++0x [stmt.ranged]: 1566ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// A range-based for statement is equivalent to 1567ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1568ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// { 1569ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// auto && __range = range-init; 1570ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// for ( auto __begin = begin-expr, 1571ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// __end = end-expr; 1572ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// __begin != __end; 1573ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// ++__begin ) { 1574ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// for-range-declaration = *__begin; 1575ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// statement 1576ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// } 1577ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// } 1578ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1579ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// The body of the loop is not available yet, since it cannot be analysed until 1580ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// we have determined the type of the for-range-declaration. 1581ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult 1582ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithSema::ActOnCXXForRangeStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 1583ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Stmt *First, SourceLocation ColonLoc, Expr *Range, 1584ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RParenLoc) { 1585ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!First || !Range) 1586ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1587ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1588ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *DS = dyn_cast<DeclStmt>(First); 1589ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith assert(DS && "first part of for range not a decl stmt"); 1590ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1591ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!DS->isSingleDecl()) { 1592ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(DS->getStartLoc(), diag::err_type_defined_in_for_range); 1593ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1594ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1595ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DS->getSingleDecl()->isInvalidDecl()) 1596ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1597ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1598ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DiagnoseUnexpandedParameterPack(Range, UPPC_Expression)) 1599ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1600ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1601ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build auto && __range = range-init 1602ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RangeLoc = Range->getLocStart(); 1603ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *RangeVar = BuildForRangeVarDecl(*this, RangeLoc, 1604ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Context.getAutoRRefDeductType(), 1605ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__range"); 1606ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, RangeVar, Range, RangeLoc, 1607ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_deduction_failure)) 1608ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1609ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1610ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Claim the type doesn't contain auto: we've already done the checking. 1611ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclGroupPtrTy RangeGroup = 1612ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BuildDeclaratorGroup((Decl**)&RangeVar, 1, /*TypeMayContainAuto=*/false); 1613ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith StmtResult RangeDecl = ActOnDeclStmt(RangeGroup, RangeLoc, RangeLoc); 1614ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RangeDecl.isInvalid()) 1615ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1616ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1617ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return BuildCXXForRangeStmt(ForLoc, ColonLoc, RangeDecl.get(), 1618ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*BeginEndDecl=*/0, /*Cond=*/0, /*Inc=*/0, DS, 1619ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith RParenLoc); 1620ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1621ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1622ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// BuildCXXForRangeStmt - Build or instantiate a C++0x for-range statement. 1623ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult 1624ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithSema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc, 1625ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Stmt *RangeDecl, Stmt *BeginEnd, Expr *Cond, 1626ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Inc, Stmt *LoopVarDecl, 1627ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RParenLoc) { 1628ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Scope *S = getCurScope(); 1629ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1630ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *RangeDS = cast<DeclStmt>(RangeDecl); 1631ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *RangeVar = cast<VarDecl>(RangeDS->getSingleDecl()); 1632ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType RangeVarType = RangeVar->getType(); 1633ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1634ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *LoopVarDS = cast<DeclStmt>(LoopVarDecl); 1635ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *LoopVar = cast<VarDecl>(LoopVarDS->getSingleDecl()); 1636ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1637ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith StmtResult BeginEndDecl = BeginEnd; 1638ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult NotEqExpr = Cond, IncrExpr = Inc; 1639ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1640ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!BeginEndDecl.get() && !RangeVarType->isDependentType()) { 1641ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RangeLoc = RangeVar->getLocation(); 1642ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1643e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek const QualType RangeVarNonRefType = RangeVarType.getNonReferenceType(); 1644e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1645e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek ExprResult BeginRangeRef = BuildDeclRefExpr(RangeVar, RangeVarNonRefType, 1646e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1647e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRangeRef.isInvalid()) 1648e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1649e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1650e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek ExprResult EndRangeRef = BuildDeclRefExpr(RangeVar, RangeVarNonRefType, 1651e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1652e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (EndRangeRef.isInvalid()) 1653ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1654ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1655ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType AutoType = Context.getAutoDeductType(); 1656ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Range = RangeVar->getInit(); 1657ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Range) 1658ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1659ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType RangeType = Range->getType(); 1660ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1661ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RequireCompleteType(RangeLoc, RangeType, 1662ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith PDiag(diag::err_for_range_incomplete_type))) 1663ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1664ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1665ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build auto __begin = begin-expr, __end = end-expr. 1666ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *BeginVar = BuildForRangeVarDecl(*this, ColonLoc, AutoType, 1667ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__begin"); 1668ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *EndVar = BuildForRangeVarDecl(*this, ColonLoc, AutoType, 1669ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__end"); 1670ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1671ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build begin-expr and end-expr and attach to __begin and __end variables. 1672ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BeginExpr, EndExpr; 1673ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (const ArrayType *UnqAT = RangeType->getAsArrayTypeUnsafe()) { 1674ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - if _RangeT is an array type, begin-expr and end-expr are __range and 1675ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // __range + __bound, respectively, where __bound is the array bound. If 1676ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // _RangeT is an array of unknown size or an array of incomplete type, 1677ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // the program is ill-formed; 1678ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1679ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // begin-expr is __range. 1680e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginExpr = BeginRangeRef; 1681e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (FinishForRangeVarDecl(*this, BeginVar, BeginRangeRef.get(), ColonLoc, 1682ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1683ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1684ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1685ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1686ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1687ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Find the array bound. 1688ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BoundExpr; 1689ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(UnqAT)) 1690ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr = Owned(IntegerLiteral::Create(Context, CAT->getSize(), 16911dd986dff9ddfbec687975700770bb377988e9edRichard Trieu Context.getPointerDiffType(), 16921dd986dff9ddfbec687975700770bb377988e9edRichard Trieu RangeLoc)); 1693ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith else if (const VariableArrayType *VAT = 1694ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith dyn_cast<VariableArrayType>(UnqAT)) 1695ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr = VAT->getSizeExpr(); 1696ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith else { 1697ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Can't be a DependentSizedArrayType or an IncompleteArrayType since 1698ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // UnqAT is not incomplete and Range is not type-dependent. 1699b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Unexpected array type in for-range"); 1700ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1701ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1702ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // end-expr is __range + __bound. 1703e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek EndExpr = ActOnBinOp(S, ColonLoc, tok::plus, EndRangeRef.get(), 1704ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr.get()); 1705ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (EndExpr.isInvalid()) 1706ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1707ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, EndVar, EndExpr.get(), ColonLoc, 1708ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1709ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1710ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1711ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1712ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1713ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclarationNameInfo BeginNameInfo(&PP.getIdentifierTable().get("begin"), 1714ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc); 1715ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclarationNameInfo EndNameInfo(&PP.getIdentifierTable().get("end"), 1716ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc); 1717ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1718ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult BeginMemberLookup(*this, BeginNameInfo, LookupMemberName); 1719ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult EndMemberLookup(*this, EndNameInfo, LookupMemberName); 1720ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1721ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CXXRecordDecl *D = RangeType->getAsCXXRecordDecl()) { 1722ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - if _RangeT is a class type, the unqualified-ids begin and end are 1723ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // looked up in the scope of class _RangeT as if by class member access 1724ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // lookup (3.4.5), and if either (or both) finds at least one 1725ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // declaration, begin-expr and end-expr are __range.begin() and 1726ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // __range.end(), respectively; 1727ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupQualifiedName(BeginMemberLookup, D); 1728ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupQualifiedName(EndMemberLookup, D); 1729ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1730ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (BeginMemberLookup.empty() != EndMemberLookup.empty()) { 1731ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(ColonLoc, diag::err_for_range_member_begin_end_mismatch) 1732ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << RangeType << BeginMemberLookup.empty(); 1733ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1734ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1735ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1736ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - otherwise, begin-expr and end-expr are begin(__range) and 1737ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // end(__range), respectively, where begin and end are looked up with 1738ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // argument-dependent lookup (3.4.2). For the purposes of this name 1739ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // lookup, namespace std is an associated namespace. 1740ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1741ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1742ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, BeginVar, 1743ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_begin, BeginNameInfo, 1744e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginMemberLookup, 1745e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginRangeRef.get()); 1746ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (BeginExpr.isInvalid()) 1747ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1748ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1749ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith EndExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, EndVar, 1750ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_end, EndNameInfo, 1751e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek EndMemberLookup, EndRangeRef.get()); 1752ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (EndExpr.isInvalid()) 1753ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1754ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1755ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1756ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // C++0x [decl.spec.auto]p6: BeginType and EndType must be the same. 1757ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType BeginType = BeginVar->getType(), EndType = EndVar->getType(); 1758ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Context.hasSameType(BeginType, EndType)) { 1759ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(RangeLoc, diag::err_for_range_begin_end_types_differ) 1760ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << BeginType << EndType; 1761ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1762ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1763ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1764ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1765ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl *BeginEndDecls[] = { BeginVar, EndVar }; 1766ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Claim the type doesn't contain auto: we've already done the checking. 1767ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclGroupPtrTy BeginEndGroup = 1768ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BuildDeclaratorGroup(BeginEndDecls, 2, /*TypeMayContainAuto=*/false); 1769ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndDecl = ActOnDeclStmt(BeginEndGroup, ColonLoc, ColonLoc); 1770ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1771e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek const QualType BeginRefNonRefType = BeginType.getNonReferenceType(); 1772e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek ExprResult BeginRef = BuildDeclRefExpr(BeginVar, BeginRefNonRefType, 1773ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1774e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRef.isInvalid()) 1775e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1776e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1777ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult EndRef = BuildDeclRefExpr(EndVar, EndType.getNonReferenceType(), 1778ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1779e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (EndRef.isInvalid()) 1780e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1781ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1782ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check __begin != __end expression. 1783ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnBinOp(S, ColonLoc, tok::exclaimequal, 1784ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginRef.get(), EndRef.get()); 1785ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnBooleanCondition(S, ColonLoc, NotEqExpr.get()); 1786ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnFinishFullExpr(NotEqExpr.get()); 1787ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (NotEqExpr.isInvalid()) { 1788ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1789ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Context.hasSameType(BeginType, EndType)) 1790ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1791ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1792ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1793ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1794ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check ++__begin expression. 1795e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginRef = BuildDeclRefExpr(BeginVar, BeginRefNonRefType, 1796e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1797e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRef.isInvalid()) 1798e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1799e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1800ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IncrExpr = ActOnUnaryOp(S, ColonLoc, tok::plusplus, BeginRef.get()); 1801ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IncrExpr = ActOnFinishFullExpr(IncrExpr.get()); 1802ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (IncrExpr.isInvalid()) { 1803ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1804ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1805ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1806ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1807ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check *__begin expression. 1808e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginRef = BuildDeclRefExpr(BeginVar, BeginRefNonRefType, 1809e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1810e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRef.isInvalid()) 1811e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1812e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1813ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult DerefExpr = ActOnUnaryOp(S, ColonLoc, tok::star, BeginRef.get()); 1814ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DerefExpr.isInvalid()) { 1815ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1816ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1817ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1818ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1819ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Attach *__begin as initializer for VD. 1820ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!LoopVar->isInvalidDecl()) { 1821ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith AddInitializerToDecl(LoopVar, DerefExpr.get(), /*DirectInit=*/false, 1822ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TypeMayContainAuto=*/true); 1823ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (LoopVar->isInvalidDecl()) 1824ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1825ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1826cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith } else { 1827cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith // The range is implicitly used as a placeholder when it is dependent. 1828cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith RangeVar->setUsed(); 1829ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1830ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1831ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return Owned(new (Context) CXXForRangeStmt(RangeDS, 1832ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith cast_or_null<DeclStmt>(BeginEndDecl.get()), 1833ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr.take(), IncrExpr.take(), 1834ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LoopVarDS, /*Body=*/0, ForLoc, 1835ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc, RParenLoc)); 1836ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1837ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1838ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// FinishCXXForRangeStmt - Attach the body to a C++0x for-range statement. 1839ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// This is a separate step from ActOnCXXForRangeStmt because analysis of the 1840ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// body cannot be performed until after the type of the range variable is 1841ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// determined. 1842ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult Sema::FinishCXXForRangeStmt(Stmt *S, Stmt *B) { 1843ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!S || !B) 1844ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1845ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1846625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko CXXForRangeStmt *ForStmt = cast<CXXForRangeStmt>(S); 1847625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko ForStmt->setBody(B); 1848625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 1849625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko DiagnoseEmptyStmtBody(ForStmt->getRParenLoc(), B, 1850625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko diag::warn_empty_range_based_for_body); 1851625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 1852ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return S; 1853ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1854ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 185557ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerStmtResult Sema::ActOnGotoStmt(SourceLocation GotoLoc, 185657ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation LabelLoc, 185757ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner LabelDecl *TheDecl) { 185857ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner getCurFunction()->setHasBranchIntoScope(); 1859ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setUsed(); 1860ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(new (Context) GotoStmt(TheDecl, GotoLoc, LabelLoc)); 18615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 18625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 186360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1864ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 18659ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E) { 1866bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 18675f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 18685f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 18692877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth QualType DestTy = Context.getPointerType(Context.VoidTy.withConst()); 1870429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult ExprRes = Owned(E); 18715f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 1872429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CheckSingleAssignmentConstraints(DestTy, ExprRes); 1873429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (ExprRes.isInvalid()) 1874429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1875429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley E = ExprRes.take(); 18762877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth if (DiagnoseAssignmentResult(ConvTy, StarLoc, DestTy, ETy, E, AA_Passing)) 18775f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 1878d29975fd08713eb9d1777e60536addaa62df8995Eli Friedman E = MaybeCreateExprWithCleanups(E); 18795f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 1880b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 1881781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasIndirectGoto(); 1882b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 18835f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 18845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 18855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 188660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 18871b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 18885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 18895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 18905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 18914cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 18925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 18934cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 18948189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 18955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 18965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 189760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 18981b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 18995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 19005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 19015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 19024cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 19035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 19044cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 19058189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 19065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 19075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1908dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \brief Determine whether the given expression is a candidate for 1909f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// copy elision in either a return statement or a throw expression. 19105077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1911f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param ReturnType If we're determining the copy elision candidate for 1912f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// a return statement, this is the return type of the function. If we're 1913f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// determining the copy elision candidate for a throw expression, this will 1914f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// be a NULL type. 19155077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1916f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param E The expression being returned from the function or block, or 1917f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// being thrown. 19185077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 19194926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// \param AllowFunctionParameter Whether we allow function parameters to 19204926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// be considered NRVO candidates. C++ prohibits this for NRVO itself, but 19214926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// we re-use this logic to determine whether we should try to move as part of 19224926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// a return or throw (which does allow function parameters). 19235077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 19245077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \returns The NRVO candidate variable, if the return statement may use the 19255077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// NRVO, or NULL if there is no such candidate. 1926f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregorconst VarDecl *Sema::getCopyElisionCandidate(QualType ReturnType, 1927f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor Expr *E, 1928f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor bool AllowFunctionParameter) { 1929f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor QualType ExprType = E->getType(); 19303c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // - in a return statement in a function with ... 19313c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // ... a class return type ... 1932f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType.isNull()) { 1933f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType->isRecordType()) 1934f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1935f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // ... the same cv-unqualified type as the function return type ... 1936f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!Context.hasSameUnqualifiedType(ReturnType, ExprType)) 1937f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1938f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor } 1939dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1940dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // ... the expression is the name of a non-volatile automatic object 1941f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // (other than a function or catch-clause parameter)) ... 1942f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(E->IgnoreParens()); 19433c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!DR) 19445077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 19453c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 19463c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!VD) 19475077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 1948dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 19491cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // ...object (other than a function or catch-clause parameter)... 19501cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->getKind() != Decl::Var && 19511cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall !(AllowFunctionParameter && VD->getKind() == Decl::ParmVar)) 19521cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall return 0; 19531cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->isExceptionVariable()) return 0; 19541cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall 19551cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // ...automatic... 19561cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (!VD->hasLocalStorage()) return 0; 19571cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall 19581cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // ...non-volatile... 19591cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->getType().isVolatileQualified()) return 0; 19601cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->getType()->isReferenceType()) return 0; 19611cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall 19621cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // __block variables can't be allocated in a way that permits NRVO. 19631cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->hasAttr<BlocksAttr>()) return 0; 19641cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall 19651cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // Variables with higher required alignment than their type's ABI 19661cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // alignment cannot use NRVO. 19671cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->hasAttr<AlignedAttr>() && 19681cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall Context.getDeclAlign(VD) > Context.getTypeAlignInChars(VD->getType())) 19691cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall return 0; 1970dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 19711cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall return VD; 19723c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor} 19733c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor 197407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// \brief Perform the initialization of a potentially-movable value, which 197507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// is the result of return value. 1976cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// 1977cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// This routine implements C++0x [class.copy]p33, which attempts to treat 1978cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// returned lvalues as rvalues in certain cases (to prefer move construction), 1979cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// then falls back to treating them as lvalues if that failed. 1980dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiExprResult 198107f402cff25354c5f06f307f19b0c57c09d964bdDouglas GregorSema::PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 198207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor const VarDecl *NRVOCandidate, 198307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor QualType ResultType, 1984bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor Expr *Value, 1985bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor bool AllowNRVO) { 1986cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // C++0x [class.copy]p33: 1987dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // When the criteria for elision of a copy operation are met or would 1988dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // be met save for the fact that the source object is a function 1989dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // parameter, and the object to be copied is designated by an lvalue, 1990cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // overload resolution to select the constructor for the copy is first 1991cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // performed as if the object were designated by an rvalue. 1992cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor ExprResult Res = ExprError(); 1993bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor if (AllowNRVO && 1994bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor (NRVOCandidate || getCopyElisionCandidate(ResultType, Value, true))) { 1995dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ImplicitCastExpr AsRvalue(ImplicitCastExpr::OnStack, 199607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getType(), CK_LValueToRValue, 199707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value, VK_XValue); 1998dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1999cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Expr *InitExpr = &AsRvalue; 2000dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializationKind Kind 200107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = InitializationKind::CreateCopy(Value->getLocStart(), 200207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getLocStart()); 200307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor InitializationSequence Seq(*this, Entity, Kind, &InitExpr, 1); 2004dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2005dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // [...] If overload resolution fails, or if the type of the first 2006cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // parameter of the selected constructor is not an rvalue reference 20070099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // to the object's type (possibly cv-qualified), overload resolution 2008cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // is performed again, considering the object as an lvalue. 2009383616cd2e61131a534afd9364ef53f643e1f834Sebastian Redl if (Seq) { 2010cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor for (InitializationSequence::step_iterator Step = Seq.step_begin(), 2011cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor StepEnd = Seq.step_end(); 2012cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Step != StepEnd; ++Step) { 2013383616cd2e61131a534afd9364ef53f643e1f834Sebastian Redl if (Step->Kind != InitializationSequence::SK_ConstructorInitialization) 2014cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor continue; 2015dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2016dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CXXConstructorDecl *Constructor 2017cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor = cast<CXXConstructorDecl>(Step->Function.Function); 2018dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2019cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor const RValueReferenceType *RRefType 202007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = Constructor->getParamDecl(0)->getType() 202107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor ->getAs<RValueReferenceType>(); 2022dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2023cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // If we don't meet the criteria, break out now. 2024dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!RRefType || 202507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor !Context.hasSameUnqualifiedType(RRefType->getPointeeType(), 202607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Context.getTypeDeclType(Constructor->getParent()))) 2027cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor break; 2028dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2029cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Promote "AsRvalue" to the heap, since we now need this 2030cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // expression node to persist. 203107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value = ImplicitCastExpr::Create(Context, Value->getType(), 2032dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CK_LValueToRValue, Value, 0, 203307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor VK_XValue); 2034dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2035cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Complete type-checking the initialization of the return type 2036cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // using the constructor we found. 203707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = Seq.Perform(*this, Entity, Kind, MultiExprArg(&Value, 1)); 2038cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 2039cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 2040cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 2041dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2042cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Either we didn't meet the criteria for treating an lvalue as an rvalue, 2043dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // above, or overload resolution failed. Either way, we need to try 2044cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // (again) now with the return value expression as written. 2045cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor if (Res.isInvalid()) 204607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = PerformCopyInitialization(Entity, SourceLocation(), Value); 2047dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2048cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor return Res; 2049cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor} 2050cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor 205184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman/// ActOnCapScopeReturnStmt - Utility routine to type-check return statements 205284b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman/// for capturing scopes. 20534eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 205460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 205584b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli FriedmanSema::ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 205684b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman // If this is the first return we've seen, infer the return type. 205784b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman // [expr.prim.lambda]p4 in C++11; block literals follow a superset of those 205884b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman // rules which allows multiple return statements. 205984b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman CapturingScopeInfo *CurCap = cast<CapturingScopeInfo>(getCurFunction()); 206084b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman if (CurCap->HasImplicitReturnType) { 206184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman QualType ReturnT; 2062a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor if (RetValExp && !isa<InitListExpr>(RetValExp)) { 2063429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(RetValExp); 2064429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2065429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 2066429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley RetValExp = Result.take(); 20676a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor 206884b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman if (!RetValExp->isTypeDependent()) 206984b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman ReturnT = RetValExp->getType(); 207084b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman else 207184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman ReturnT = Context.DependentTy; 2072a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor } else { 2073a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor if (RetValExp) { 2074a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor // C++11 [expr.lambda.prim]p4 bans inferring the result from an 2075a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor // initializer list, because it is not an expression (even 2076a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor // though we represent it as one). We still deduce 'void'. 2077a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor Diag(ReturnLoc, diag::err_lambda_return_init_list) 2078a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor << RetValExp->getSourceRange(); 2079a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor } 2080a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor 208184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman ReturnT = Context.VoidTy; 208284b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman } 208384b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman // We require the return types to strictly match here. 208484b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman if (!CurCap->ReturnType.isNull() && 208584b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman !CurCap->ReturnType->isDependentType() && 208684b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman !ReturnT->isDependentType() && 208784b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman !Context.hasSameType(ReturnT, CurCap->ReturnType)) { 208884b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman Diag(ReturnLoc, diag::err_typecheck_missing_return_type_incompatible) 20894e88df72e690498aeba2dc3d5089388b27be66faDouglas Gregor << ReturnT << CurCap->ReturnType 20900bcc3d87223d7796946bfa6dd6174af900d8eba4Douglas Gregor << (getCurLambda() != 0); 209184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman return StmtError(); 2092649657e7d6c150136cae5ab22e39b9794cff80ccFariborz Jahanian } 209384b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman CurCap->ReturnType = ReturnT; 20944eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 209584b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman QualType FnRetType = CurCap->ReturnType; 209684b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman assert(!FnRetType.isNull()); 20974cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 2098793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor if (BlockScopeInfo *CurBlock = dyn_cast<BlockScopeInfo>(CurCap)) { 209984b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman if (CurBlock->FunctionType->getAs<FunctionType>()->getNoReturnAttr()) { 210084b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr); 210184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman return StmtError(); 210284b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman } 2103793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor } else { 2104793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor LambdaScopeInfo *LSI = cast<LambdaScopeInfo>(CurCap); 2105793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor if (LSI->CallOperator->getType()->getAs<FunctionType>()->getNoReturnAttr()){ 2106793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor Diag(ReturnLoc, diag::err_noreturn_lambda_has_return_expr); 2107793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor return StmtError(); 2108793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor } 2109793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor } 21106c92fa75e62937f9738696840efcb258560f4568Mike Stump 21114eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 21124eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 21134eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 2114d963c37eb912342c8325048749e449861cf0a6e3John McCall const VarDecl *NRVOCandidate = 0; 21150a7efe1142d241678c91bf93ee6adb51289863a4John McCall if (FnRetType->isDependentType()) { 21160a7efe1142d241678c91bf93ee6adb51289863a4John McCall // Delay processing for now. TODO: there are lots of dependent 21170a7efe1142d241678c91bf93ee6adb51289863a4John McCall // types we can conclusively prove aren't void. 21180a7efe1142d241678c91bf93ee6adb51289863a4John McCall } else if (FnRetType->isVoidType()) { 21195b38a0f98e4420dae1bd3e13959bc207c97a9e98Sebastian Redl if (RetValExp && !isa<InitListExpr>(RetValExp) && 21204e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie !(getLangOpts().CPlusPlus && 21210a7efe1142d241678c91bf93ee6adb51289863a4John McCall (RetValExp->isTypeDependent() || 21220a7efe1142d241678c91bf93ee6adb51289863a4John McCall RetValExp->getType()->isVoidType()))) { 21234e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian if (!getLangOpts().CPlusPlus && 21244e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian RetValExp->getType()->isVoidType()) 21259354f6aaa70e1543d122644fee0c3f834324d2fcFariborz Jahanian Diag(ReturnLoc, diag::ext_return_has_void_expr) << "literal" << 2; 21264e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian else { 21274e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian Diag(ReturnLoc, diag::err_return_block_has_expr); 21284e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian RetValExp = 0; 21294e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian } 21304eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 21315077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp) { 21320a7efe1142d241678c91bf93ee6adb51289863a4John McCall return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 21330a7efe1142d241678c91bf93ee6adb51289863a4John McCall } else if (!RetValExp->isTypeDependent()) { 21340a7efe1142d241678c91bf93ee6adb51289863a4John McCall // we have a non-void block with an expression, continue checking 21350a7efe1142d241678c91bf93ee6adb51289863a4John McCall 21360a7efe1142d241678c91bf93ee6adb51289863a4John McCall // C99 6.8.6.4p3(136): The return statement is not an assignment. The 21370a7efe1142d241678c91bf93ee6adb51289863a4John McCall // overlap restriction of subclause 6.5.16.1 does not apply to the case of 21380a7efe1142d241678c91bf93ee6adb51289863a4John McCall // function return. 21390a7efe1142d241678c91bf93ee6adb51289863a4John McCall 21400a7efe1142d241678c91bf93ee6adb51289863a4John McCall // In C++ the return statement is handled via a copy initialization. 21410a7efe1142d241678c91bf93ee6adb51289863a4John McCall // the C version of which boils down to CheckSingleAssignmentConstraints. 21420a7efe1142d241678c91bf93ee6adb51289863a4John McCall NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 21430a7efe1142d241678c91bf93ee6adb51289863a4John McCall InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 21440a7efe1142d241678c91bf93ee6adb51289863a4John McCall FnRetType, 21450586520acb2f368c874943353a222be7f00c3068Fariborz Jahanian NRVOCandidate != 0); 21460a7efe1142d241678c91bf93ee6adb51289863a4John McCall ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 21470a7efe1142d241678c91bf93ee6adb51289863a4John McCall FnRetType, RetValExp); 21480a7efe1142d241678c91bf93ee6adb51289863a4John McCall if (Res.isInvalid()) { 21490a7efe1142d241678c91bf93ee6adb51289863a4John McCall // FIXME: Cleanup temporaries here, anyway? 21500a7efe1142d241678c91bf93ee6adb51289863a4John McCall return StmtError(); 2151c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson } 21520a7efe1142d241678c91bf93ee6adb51289863a4John McCall RetValExp = Res.take(); 21530a7efe1142d241678c91bf93ee6adb51289863a4John McCall CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 2154d963c37eb912342c8325048749e449861cf0a6e3John McCall } 2155dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2156d963c37eb912342c8325048749e449861cf0a6e3John McCall if (RetValExp) { 2157d963c37eb912342c8325048749e449861cf0a6e3John McCall CheckImplicitConversions(RetValExp, ReturnLoc); 2158d963c37eb912342c8325048749e449861cf0a6e3John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 215998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 21600a7efe1142d241678c91bf93ee6adb51289863a4John McCall ReturnStmt *Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 21610a7efe1142d241678c91bf93ee6adb51289863a4John McCall NRVOCandidate); 21624cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 2163dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 21645077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 21654e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().CPlusPlus && FnRetType->isRecordType() && 21665077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 21675077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 2168dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 21695077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 21704eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 21715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 217260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 21739ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 2174fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor // Check for unexpanded parameter packs. 2175fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor if (RetValExp && DiagnoseUnexpandedParameterPack(RetValExp)) 2176fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor return StmtError(); 2177fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor 217884b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman if (isa<CapturingScopeInfo>(getCurFunction())) 217984b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman return ActOnCapScopeReturnStmt(ReturnLoc, RetValExp); 21804cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 2181371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 218238ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman QualType RelatedRetType; 2183f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 2184371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 218504a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall if (FD->hasAttr<NoReturnAttr>() || 218604a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall FD->getType()->getAs<FunctionType>()->getNoReturnAttr()) 21878662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 218879430e9983f5e67a378fc1f50cd6278f2cea8259Eli Friedman << FD->getDeclName(); 2189926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else if (ObjCMethodDecl *MD = getCurMethodDecl()) { 219038ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman FnRetType = MD->getResultType(); 2191926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor if (MD->hasRelatedResultType() && MD->getClassInterface()) { 2192926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // In the implementation of a method with a related return type, the 2193926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // type used to type-check the validity of return statements within the 2194926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // method body is a pointer to the type of the class being implemented. 219538ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman RelatedRetType = Context.getObjCInterfaceType(MD->getClassInterface()); 219638ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman RelatedRetType = Context.getObjCObjectPointerType(RelatedRetType); 2197926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } 2198926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else // If we don't have a function/method context, bail. 2199c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 22001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22015077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 22025cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 22038d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (RetValExp) { 220433deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl if (isa<InitListExpr>(RetValExp)) { 220533deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl // We simply never allow init lists as the return value of void 220633deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl // functions. This is compatible because this was never allowed before, 220733deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl // so there's no legacy code to deal with. 220833deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 220933deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl int FunctionKind = 0; 221033deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl if (isa<ObjCMethodDecl>(CurDecl)) 221133deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl FunctionKind = 1; 221233deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl else if (isa<CXXConstructorDecl>(CurDecl)) 221333deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl FunctionKind = 2; 221433deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl else if (isa<CXXDestructorDecl>(CurDecl)) 221533deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl FunctionKind = 3; 221633deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl 221733deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl Diag(ReturnLoc, diag::err_return_init_list) 221833deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl << CurDecl->getDeclName() << FunctionKind 221933deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl << RetValExp->getSourceRange(); 222033deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl 222133deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl // Drop the expression. 222233deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl RetValExp = 0; 222333deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl } else if (!RetValExp->isTypeDependent()) { 22248d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky // C99 6.8.6.4p1 (ext_ since GCC warns) 22258d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky unsigned D = diag::ext_return_has_expr; 22268d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (RetValExp->getType()->isVoidType()) 22278d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky D = diag::ext_return_has_void_expr; 22288d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky else { 22298d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky ExprResult Result = Owned(RetValExp); 22308d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Result = IgnoredValueConversions(Result.take()); 22318d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (Result.isInvalid()) 22328d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky return StmtError(); 22338d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky RetValExp = Result.take(); 22348d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky RetValExp = ImpCastExprToType(RetValExp, 22358d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Context.VoidTy, CK_ToVoid).take(); 22368d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky } 22374cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 22388d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky // return (some void expression); is legal in C++. 22398d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (D != diag::ext_return_has_void_expr || 22404e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie !getLangOpts().CPlusPlus) { 22418d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 2242ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth 2243ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth int FunctionKind = 0; 2244ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth if (isa<ObjCMethodDecl>(CurDecl)) 2245ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 1; 2246ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth else if (isa<CXXConstructorDecl>(CurDecl)) 2247ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 2; 2248ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth else if (isa<CXXDestructorDecl>(CurDecl)) 2249ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 3; 2250ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth 22518d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Diag(ReturnLoc, D) 2252ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth << CurDecl->getDeclName() << FunctionKind 22538d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky << RetValExp->getSourceRange(); 22548d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky } 2255e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 22561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 225733deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl if (RetValExp) { 225833deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl CheckImplicitConversions(RetValExp, ReturnLoc); 225933deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl RetValExp = MaybeCreateExprWithCleanups(RetValExp); 226033deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl } 22615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2262dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 22635077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 22645077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp && !FnRetType->isDependentType()) { 22653c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 22663c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 22674e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().C99) DiagID = diag::ext_return_missing_expr; 22683c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 22693c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 227008631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 22713c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 227208631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 22735077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc); 22745077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 22755077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 22765077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 22775077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void function with an expression, continue checking 22785077c3876beeaed32280af88244e8050078619a8Douglas Gregor 227938ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman if (!RelatedRetType.isNull()) { 228038ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman // If we have a related result type, perform an extra conversion here. 228138ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman // FIXME: The diagnostics here don't really describe what is happening. 228238ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman InitializedEntity Entity = 228338ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman InitializedEntity::InitializeTemporary(RelatedRetType); 228438ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman 228538ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman ExprResult Res = PerformCopyInitialization(Entity, SourceLocation(), 228638ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman RetValExp); 228738ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman if (Res.isInvalid()) { 228838ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman // FIXME: Cleanup temporaries here, anyway? 228938ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman return StmtError(); 229038ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman } 229138ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman RetValExp = Res.takeAs<Expr>(); 229238ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman } 229338ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman 22945077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 22955077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 22965077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 22975077c3876beeaed32280af88244e8050078619a8Douglas Gregor 2298856d3798af7c2f7251e4a295f3da7a09ce4c62abJohn McCall // In C++ the return statement is handled via a copy initialization, 22995077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 2300f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 2301dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 230207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 230358f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet NRVOCandidate != 0); 2304dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 230507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 23065077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 23075077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 23085077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 23095077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 23104cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 23115077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 2312dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 23135077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 231466724ea67d7d598b937d86fa66f03f09a1c758f3Douglas Gregor } 2315dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2316b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 2317b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 23184765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 2319b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 23205077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 2321898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 2322dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2323dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 23245077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 23254e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().CPlusPlus && FnRetType->isRecordType() && 23265077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 23275077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 2328f85e193739c953358c865005855253af4f68a497John McCall 23295077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 23305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 23315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2332810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 2333810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 2334810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 2335810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 2336810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 2337810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 2338810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 2339810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 2340703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson // Type dependent expressions will be checked during instantiation. 2341703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson if (E->isTypeDependent()) 2342703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson return false; 2343dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 23447eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E->isLValue()) 2345810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 2346810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 2347810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 2348810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 2349810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 23507eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E != E2 && E2->isLValue()) { 23514e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!S.getLangOpts().HeinousExtensions) 2352810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 2353810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 2354810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 2355810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 2356810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 2357810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 2358810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 2359810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 2360810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 2361810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 2362810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 2363810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 2364810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 2365ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// isOperandMentioned - Return true if the specified operand # is mentioned 2366ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// anywhere in the decomposed asm string. 2367ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattnerstatic bool isOperandMentioned(unsigned OpNo, 23682d3ba4f5a923a90c3fc290ddfba5e36c2d0a9b46Chris Lattner ArrayRef<AsmStmt::AsmStringPiece> AsmStrPieces) { 2369ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner for (unsigned p = 0, e = AsmStrPieces.size(); p != e; ++p) { 2370ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner const AsmStmt::AsmStringPiece &Piece = AsmStrPieces[p]; 2371ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (!Piece.isOperand()) continue; 2372ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 2373ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 2374ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 2375ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (Piece.getOperandNo() == OpNo) 2376ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return true; 2377ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 2378ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 2379ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return false; 2380ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner} 2381810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 2382ca57b4b7658a031b74cda5ac504311998be8e343Chris LattnerStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, bool IsSimple, 2383ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner bool IsVolatile, unsigned NumOutputs, 2384ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner unsigned NumInputs, IdentifierInfo **Names, 2385ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner MultiExprArg constraints, MultiExprArg exprs, 2386ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner Expr *asmString, MultiExprArg clobbers, 2387ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner SourceLocation RParenLoc, bool MSAsm) { 23883037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 23893037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 23903037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 23919ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr **Exprs = exprs.get(); 23929ae2f076ca5ab1feb3ba95629099ec2319833701John McCall StringLiteral *AsmString = cast<StringLiteral>(asmString); 23933037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 23943037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 23955f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 23961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23971708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 23985cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!AsmString->isAscii()) 23993037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 24003037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 24013037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 24021708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 24031708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 24045cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 24053037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 24063037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 24073037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 24085f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef OutputName; 2409ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 2410ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson OutputName = Names[i]->getName(); 2411ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 2412ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 2413bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (!Context.getTargetInfo().validateOutputConstraint(Info)) 24143037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 2415432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 2416432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 24173037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2418d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 241972056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 2420810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 242172056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 2422dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 242372056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 242404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 24251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 242644def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 242704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 24283037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 24295f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 2430806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 243104728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 24321708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 24335cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 24343037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 24353037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 24363037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 24375f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef InputName; 2438ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 2439ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson InputName = Names[i]->getName(); 2440ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 2441ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 2442bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (!Context.getTargetInfo().validateInputConstraint(OutputConstraintInfos.data(), 24432819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 24443037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 2445432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 2446432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 2447d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 24483037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 244972056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 24503037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2451d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 245244def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 2453810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 245472056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 2455d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 2456432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 245772056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 245804728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 24593037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 246044def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 2461d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 246272056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 2463d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 24641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump << InputExpr->getType() << Info.getConstraintStr() 246572056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 2466d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 2467d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 24681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2469429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(Exprs[i]); 2470429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2471429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 24721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2473429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Exprs[i] = Result.take(); 2474806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 247504728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 24763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 24776fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 24781708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 24791708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 24805cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 24813037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 24823037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 24833037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 24845f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Clobber = Literal->getString(); 24853037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2486bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (!Context.getTargetInfo().isValidClobber(Clobber)) 24873037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 24887765934ad7e157b5fcf925792a38e01b1edbcf8aDaniel Dunbar diag::err_asm_unknown_register_name) << Clobber); 24896fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 24903037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2491fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 2492dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm, 2493dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NumOutputs, NumInputs, Names, Constraints, Exprs, 2494966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson AsmString, NumClobbers, Clobbers, RParenLoc); 2495fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 2496fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 24975f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 2498fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 2499fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 25002ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 25012ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 2502fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 2503fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 25041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2505806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 2506806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 2507806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 25081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2509806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 2510806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 2511806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 2512806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 25131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2514806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 2515935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner unsigned InputOpNo = i+NumOutputs; 2516f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 2517935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Expr *InputExpr = Exprs[InputOpNo]; 2518f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman 2519f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman if (OutputExpr->isTypeDependent() || InputExpr->isTypeDependent()) 2520f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman continue; 2521f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman 25227adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 25237adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 25247adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 2525806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 25261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2527aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // Decide if the input and output are in the same domain (integer/ptr or 2528aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // floating point. 2529aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner enum AsmDomain { 2530aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner AD_Int, AD_FP, AD_Other 2531aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner } InputDomain, OutputDomain; 2532dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2533aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (InTy->isIntegerType() || InTy->isPointerType()) 2534aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Int; 25350c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (InTy->isRealFloatingType()) 2536aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_FP; 2537aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 2538aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Other; 25393351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 2540aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutTy->isIntegerType() || OutTy->isPointerType()) 2541aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Int; 25420c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (OutTy->isRealFloatingType()) 2543aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_FP; 2544aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 2545aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Other; 2546dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2547aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // They are ok if they are the same size and in the same domain. This 2548aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // allows tying things like: 2549aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int* 2550aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int if they are the same size. 2551aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // double to long double if they are the same size. 2552dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // 2553aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 2554aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 2555aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutSize == InSize && InputDomain == OutputDomain && 2556aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain != AD_Other) 2557aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 2558dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2559aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 2560f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // then we can promote the smaller one to a larger input and the asm string 2561f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // won't notice. 2562aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner bool SmallerValueMentioned = false; 2563ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 2564ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 2565ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 2566935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (isOperandMentioned(InputOpNo, Pieces)) { 2567ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // This is a use in the asm string of the smaller operand. Since we 2568ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // codegen this by promoting to a wider value, the asm will get printed 2569ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // "wrong". 2570f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= InSize < OutSize; 2571ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 2572f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner if (isOperandMentioned(TiedTo, Pieces)) { 2573ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the output, and if the output is the larger 2574ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // value, then it's ok because we'll promote the input to the larger type. 2575f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= OutSize < InSize; 2576806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 25771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2578aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 2579aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // output was a register, just extend the shorter one to the size of the 2580aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // larger one. 2581aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (!SmallerValueMentioned && InputDomain != AD_Other && 2582aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 2583aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 2584f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner 2585935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // Either both of the operands were mentioned or the smaller one was 2586935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // mentioned. One more special case that we'll allow: if the tied input is 2587935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // integer, unmentioned, and is a constant, then we'll allow truncating it 2588935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // down to the size of the destination. 2589935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (InputDomain == AD_Int && OutputDomain == AD_Int && 2590935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner !isOperandMentioned(InputOpNo, Pieces) && 2591935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner InputExpr->isEvaluatable(Context)) { 25924da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall CastKind castKind = 25934da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall (OutTy->isBooleanType() ? CK_IntegralToBoolean : CK_IntegralCast); 25944da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall InputExpr = ImpCastExprToType(InputExpr, OutTy, castKind).take(); 2595935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Exprs[InputOpNo] = InputExpr; 2596935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner NS->setInputExpr(i, InputExpr); 2597935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner continue; 2598935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner } 2599935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner 2600c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 2601806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 26027adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 2603806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 2604806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 2605806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 26061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2607fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 2608fe795956194141c91ae555985c9b930595bff43fChris Lattner} 26093b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 261060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2611431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 2612d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall SourceLocation RParen, Decl *Parm, 26139ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *Body) { 2614d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall VarDecl *Var = cast_or_null<VarDecl>(Parm); 2615160b5630aa781ac348303e1ae088d27016637778Douglas Gregor if (Var && Var->isInvalidDecl()) 2616160b5630aa781ac348303e1ae088d27016637778Douglas Gregor return StmtError(); 2617dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 26189ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtCatchStmt(AtLoc, RParen, Var, Body)); 26193b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 26203b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 262160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 26229ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body) { 26239ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, Body)); 2624161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 2625bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 262660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2627dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 26289ae2f076ca5ab1feb3ba95629099ec2319833701John McCall MultiStmtArg CatchStmts, Stmt *Finally) { 26294e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().ObjCExceptions) 2630da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@try"; 2631da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 2632781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 26338f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor unsigned NumCatchStmts = CatchStmts.size(); 26349ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(ObjCAtTryStmt::Create(Context, AtLoc, Try, 26359ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CatchStmts.release(), 26368f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor NumCatchStmts, 26379ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Finally)); 2638bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 2639bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 264060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::BuildObjCAtThrowStmt(SourceLocation AtLoc, 26419ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Throw) { 2642d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (Throw) { 2643f2dd68fb37a62571a4985c8dd05310ac90d07ef0Fariborz Jahanian Throw = MaybeCreateExprWithCleanups(Throw); 2644429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultLvalueConversion(Throw); 2645429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2646429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 26475e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 2648429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Throw = Result.take(); 2649d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor QualType ThrowType = Throw->getType(); 2650d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor // Make sure the expression type is an ObjC pointer or "void *". 2651d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!ThrowType->isDependentType() && 2652d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor !ThrowType->isObjCObjectPointerType()) { 2653d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor const PointerType *PT = ThrowType->getAs<PointerType>(); 2654d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!PT || !PT->getPointeeType()->isVoidType()) 2655d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 2656d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor << Throw->getType() << Throw->getSourceRange()); 2657d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 2658d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 2659dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 26609ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtThrowStmt(AtLoc, Throw)); 2661d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor} 2662d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor 266360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2664dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2665d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor Scope *CurScope) { 26664e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().ObjCExceptions) 2667da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@throw"; 2668da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 26699ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Throw) { 2670e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 2671e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 2672e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 2673e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 2674e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 2675e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 26764ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 2677dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 2678f2dd68fb37a62571a4985c8dd05310ac90d07ef0Fariborz Jahanian 26799ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return BuildObjCAtThrowStmt(AtLoc, Throw); 268039f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 2681bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 268207524039dce5c820f111a1b3f772b4261f004b4aJohn McCallExprResult 268307524039dce5c820f111a1b3f772b4261f004b4aJohn McCallSema::ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, Expr *operand) { 268407524039dce5c820f111a1b3f772b4261f004b4aJohn McCall ExprResult result = DefaultLvalueConversion(operand); 268507524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (result.isInvalid()) 268607524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return ExprError(); 268707524039dce5c820f111a1b3f772b4261f004b4aJohn McCall operand = result.take(); 26885e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 2689a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 269007524039dce5c820f111a1b3f772b4261f004b4aJohn McCall QualType type = operand->getType(); 269107524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (!type->isDependentType() && 269207524039dce5c820f111a1b3f772b4261f004b4aJohn McCall !type->isObjCObjectPointerType()) { 269307524039dce5c820f111a1b3f772b4261f004b4aJohn McCall const PointerType *pointerType = type->getAs<PointerType>(); 269407524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (!pointerType || !pointerType->getPointeeType()->isVoidType()) 269507524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return Diag(atLoc, diag::error_objc_synchronized_expects_object) 269607524039dce5c820f111a1b3f772b4261f004b4aJohn McCall << type << operand->getSourceRange(); 2697a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 26981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 269907524039dce5c820f111a1b3f772b4261f004b4aJohn McCall // The operand to @synchronized is a full-expression. 270007524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return MaybeCreateExprWithCleanups(operand); 270107524039dce5c820f111a1b3f772b4261f004b4aJohn McCall} 270207524039dce5c820f111a1b3f772b4261f004b4aJohn McCall 270307524039dce5c820f111a1b3f772b4261f004b4aJohn McCallStmtResult 270407524039dce5c820f111a1b3f772b4261f004b4aJohn McCallSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, Expr *SyncExpr, 270507524039dce5c820f111a1b3f772b4261f004b4aJohn McCall Stmt *SyncBody) { 270607524039dce5c820f111a1b3f772b4261f004b4aJohn McCall // We can't jump into or indirect-jump out of a @synchronized block. 270707524039dce5c820f111a1b3f772b4261f004b4aJohn McCall getCurFunction()->setHasBranchProtectedScope(); 27089ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, SyncExpr, SyncBody)); 2709fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 27104b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 27114b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 27124b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 271360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2714d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, Decl *ExDecl, 27159ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *HandlerBlock) { 27164b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 27178189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 2718d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall cast_or_null<VarDecl>(ExDecl), 27199ae2f076ca5ab1feb3ba95629099ec2319833701John McCall HandlerBlock)); 27204b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 27218351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 2722f85e193739c953358c865005855253af4f68a497John McCallStmtResult 2723f85e193739c953358c865005855253af4f68a497John McCallSema::ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body) { 2724f85e193739c953358c865005855253af4f68a497John McCall getCurFunction()->setHasBranchProtectedScope(); 2725f85e193739c953358c865005855253af4f68a497John McCall return Owned(new (Context) ObjCAutoreleasePoolStmt(AtLoc, Body)); 2726f85e193739c953358c865005855253af4f68a497John McCall} 2727f85e193739c953358c865005855253af4f68a497John McCall 27283c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 27293c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 2730c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlclass TypeWithHandler { 2731c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType t; 2732c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *stmt; 2733c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlpublic: 2734c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler(const QualType &type, CXXCatchStmt *statement) 2735c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl : t(type), stmt(statement) {} 2736c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 27370953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // An arbitrary order is fine as long as it places identical 27380953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // types next to each other. 2739c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator<(const TypeWithHandler &y) const { 27400953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() < y.t.getAsOpaquePtr()) 2741c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return true; 27420953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() > y.t.getAsOpaquePtr()) 2743c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return false; 2744c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl else 2745c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return getTypeSpecStartLoc() < y.getTypeSpecStartLoc(); 2746c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 27471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2748c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator==(const TypeWithHandler& other) const { 27490953e767ff7817f97b3ab20896b229891eeff45bJohn McCall return t == other.t; 2750c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 27511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2752c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *getCatchStmt() const { return stmt; } 2753c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl SourceLocation getTypeSpecStartLoc() const { 2754c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return stmt->getExceptionDecl()->getTypeSpecStartLoc(); 2755c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 2756c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl}; 2757c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 27583c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 27593c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 27608351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 27618351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 276260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 27639ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 27648351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 2765729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson // Don't report an error if 'try' is used in system headers. 27664e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().CXXExceptions && 2767729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson !getSourceManager().isInSystemHeader(TryLoc)) 2768729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson Diag(TryLoc, diag::err_exceptions_disabled) << "try"; 27697f11d9cf5df1f8ce82af46eabc4ec5cec7d580b0Anders Carlsson 27708351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 27718351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 27728351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 27739ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt **Handlers = RawHandlers.get(); 27748351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 27755f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TypeWithHandler, 8> TypesWithHandlers; 27761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 27771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (unsigned i = 0; i < NumHandlers; ++i) { 27785f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner CXXCatchStmt *Handler = cast<CXXCatchStmt>(Handlers[i]); 2779c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (!Handler->getExceptionDecl()) { 2780c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (i < NumHandlers - 1) 2781c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return StmtError(Diag(Handler->getLocStart(), 2782c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::err_early_catch_all)); 27831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2784c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl continue; 2785c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 27861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2787c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CaughtType = Handler->getCaughtType(); 2788c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CanonicalCaughtType = Context.getCanonicalType(CaughtType); 2789c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypesWithHandlers.push_back(TypeWithHandler(CanonicalCaughtType, Handler)); 2790c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 2791c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 2792c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl // Detect handlers for the same type as an earlier one. 2793c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (NumHandlers > 1) { 2794c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::array_pod_sort(TypesWithHandlers.begin(), TypesWithHandlers.end()); 27951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2796c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler prev = TypesWithHandlers[0]; 2797c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl for (unsigned i = 1; i < TypesWithHandlers.size(); ++i) { 2798c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler curr = TypesWithHandlers[i]; 27991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2800c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (curr == prev) { 2801c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(curr.getTypeSpecStartLoc(), 2802c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::warn_exception_caught_by_earlier_handler) 2803c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << curr.getCatchStmt()->getCaughtType().getAsString(); 2804c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(prev.getTypeSpecStartLoc(), 2805c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::note_previous_exception_handler) 2806c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << prev.getCatchStmt()->getCaughtType().getAsString(); 2807c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 28081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2809c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl prev = curr; 2810c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 28118351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 28121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2813781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 2814b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 28158351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 28168351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 28178351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 28188351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 28198351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 28208351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 28219ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(CXXTryStmt::Create(Context, TryLoc, TryBlock, 2822a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig Handlers, NumHandlers)); 28238351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 282428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 282528bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 282628bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHTryBlock(bool IsCXXTry, 282728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley SourceLocation TryLoc, 282828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *TryBlock, 282928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Handler) { 283028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(TryBlock && Handler); 283128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 283228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley getCurFunction()->setHasBranchProtectedScope(); 283328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 283428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHTryStmt::Create(Context,IsCXXTry,TryLoc,TryBlock,Handler)); 283528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 283628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 283728bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 283828bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHExceptBlock(SourceLocation Loc, 283928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Expr *FilterExpr, 284028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Block) { 284128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(FilterExpr && Block); 284228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 284328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley if(!FilterExpr->getType()->isIntegerType()) { 284458f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet return StmtError(Diag(FilterExpr->getExprLoc(), 284558f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet diag::err_filter_expression_integral) 284658f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet << FilterExpr->getType()); 284728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley } 284828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 284928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHExceptStmt::Create(Context,Loc,FilterExpr,Block)); 285028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 285128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 285228bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 285328bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHFinallyBlock(SourceLocation Loc, 285428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Block) { 285528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(Block); 285628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHFinallyStmt::Create(Context,Loc,Block)); 285728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 2858ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor 2859ba0513de93d2fab6db5ab30b6927209fcc883078Douglas GregorStmtResult Sema::BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2860ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor bool IsIfExists, 2861ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor NestedNameSpecifierLoc QualifierLoc, 2862ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor DeclarationNameInfo NameInfo, 2863ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor Stmt *Nested) 2864ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor{ 2865ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor return new (Context) MSDependentExistsStmt(KeywordLoc, IsIfExists, 2866ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor QualifierLoc, NameInfo, 2867ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor cast<CompoundStmt>(Nested)); 2868ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor} 2869ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor 2870ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor 2871ba0513de93d2fab6db5ab30b6927209fcc883078Douglas GregorStmtResult Sema::ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2872ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor bool IsIfExists, 2873ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor CXXScopeSpec &SS, 2874ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor UnqualifiedId &Name, 2875ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor Stmt *Nested) { 2876ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor return BuildMSDependentExistsStmt(KeywordLoc, IsIfExists, 2877ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor SS.getWithLocInContext(Context), 2878ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor GetNameFromUnqualifiedId(Name), 2879ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor Nested); 2880ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor} 2881