SemaStmt.cpp revision 534986f2b21e6050bf00163cd6423fd92155a6ed
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" 2284fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor#include "clang/AST/ExprCXX.h" 23419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner#include "clang/AST/ExprObjC.h" 2416f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtObjC.h" 2516f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtCXX.h" 26209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall#include "clang/AST/TypeLoc.h" 2784fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor#include "clang/Lex/Preprocessor.h" 286fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson#include "clang/Basic/TargetInfo.h" 29ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner#include "llvm/ADT/ArrayRef.h" 30c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/STLExtras.h" 31c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/SmallVector.h" 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 33781472fe99a120098c631b0cbe33c89f8cef5e70John McCallusing namespace sema; 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::ActOnExprStmt(FullExprArg expr) { 369ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E = expr.get(); 37bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor if (!E) // FIXME: FullExprArg has no error state? 38bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor return StmtError(); 39bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor 40834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // C99 6.8.3p2: The expression in an expression statement is evaluated as a 41834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // void expression for its side effects. Conversion to void allows any 42834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // operand, even incomplete types. 43a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 44834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // Same thing in for stmt first clause (when expr) and third clause. 45a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(static_cast<Stmt*>(E)); 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 49b7d98d35ea723624345f06e5895ddce2e0388ef0Argyrios KyrtzidisStmtResult Sema::ActOnNullStmt(SourceLocation SemiLoc, 50e2ca828119b8bff4a5c25c6db8ee4fec558451e7Argyrios Kyrtzidis bool HasLeadingEmptyMacro) { 51e2ca828119b8bff4a5c25c6db8ee4fec558451e7Argyrios Kyrtzidis return Owned(new (Context) NullStmt(SemiLoc, HasLeadingEmptyMacro)); 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 54337e550218128e7d922c09bb354fbc71de90c568Chris LattnerStmtResult Sema::ActOnDeclStmt(DeclGroupPtrTy dg, SourceLocation StartLoc, 55337e550218128e7d922c09bb354fbc71de90c568Chris Lattner SourceLocation EndLoc) { 5620401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 58682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // If we have an invalid decl, just return an error. 5920401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner if (DG.isNull()) return StmtError(); 601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6124e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return Owned(new (Context) DeclStmt(DG, StartLoc, EndLoc)); 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 64a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanianvoid Sema::ActOnForEachDeclStmt(DeclGroupPtrTy dg) { 65a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 66dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 67a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian // If we have an invalid decl, just return. 68a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian if (DG.isNull() || !DG.isSingleDecl()) return; 69f85e193739c953358c865005855253af4f68a497John McCall VarDecl *var = cast<VarDecl>(DG.getSingleDecl()); 70f85e193739c953358c865005855253af4f68a497John McCall 71a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian // suppress any potential 'unused variable' warning. 72f85e193739c953358c865005855253af4f68a497John McCall var->setUsed(); 73f85e193739c953358c865005855253af4f68a497John McCall 747acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // foreach variables are never actually initialized in the way that 757acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // the parser came up with. 767acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall var->setInit(0); 777acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall 787acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // In ARC, we don't need to retain the iteration variable of a fast 797acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // enumeration loop. Rather than actually trying to catch that 807acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // during declaration processing, we remove the consequences here. 814e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().ObjCAutoRefCount) { 827acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall QualType type = var->getType(); 837acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall 847acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // Only do this if we inferred the lifetime. Inferred lifetime 857acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // will show up as a local qualifier because explicit lifetime 867acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // should have shown up as an AttributedType instead. 877acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall if (type.getLocalQualifiers().getObjCLifetime() == Qualifiers::OCL_Strong) { 887acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall // Add 'const' and mark the variable as pseudo-strong. 897acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall var->setType(type.withConst()); 907acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall var->setARCPseudoStrong(true); 91f85e193739c953358c865005855253af4f68a497John McCall } 92f85e193739c953358c865005855253af4f68a497John McCall } 93a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian} 94a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian 95ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth/// \brief Diagnose unused '==' and '!=' as likely typos for '=' or '|='. 969d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth/// 979d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth/// Adding a cast to void (or other expression wrappers) will prevent the 989d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth/// warning from firing. 99ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruthstatic bool DiagnoseUnusedComparison(Sema &S, const Expr *E) { 1009d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth SourceLocation Loc; 10150bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth bool IsNotEqual, CanAssign; 1029d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 1039d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth if (const BinaryOperator *Op = dyn_cast<BinaryOperator>(E)) { 1049d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth if (Op->getOpcode() != BO_EQ && Op->getOpcode() != BO_NE) 105ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return false; 1069d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 1079d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth Loc = Op->getOperatorLoc(); 10850bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth IsNotEqual = Op->getOpcode() == BO_NE; 10950bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth CanAssign = Op->getLHS()->IgnoreParenImpCasts()->isLValue(); 1109d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth } else if (const CXXOperatorCallExpr *Op = dyn_cast<CXXOperatorCallExpr>(E)) { 1119d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth if (Op->getOperator() != OO_EqualEqual && 1129d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth Op->getOperator() != OO_ExclaimEqual) 113ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return false; 1149d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 1159d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth Loc = Op->getOperatorLoc(); 11650bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth IsNotEqual = Op->getOperator() == OO_ExclaimEqual; 11750bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth CanAssign = Op->getArg(0)->IgnoreParenImpCasts()->isLValue(); 1189d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth } else { 1199d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth // Not a typo-prone comparison. 120ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return false; 1219d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth } 1229d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 1239d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth // Suppress warnings when the operator, suspicious as it may be, comes from 1249d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth // a macro expansion. 1259d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth if (Loc.isMacroID()) 126ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return false; 1279d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 128ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth S.Diag(Loc, diag::warn_unused_comparison) 1299d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth << (unsigned)IsNotEqual << E->getSourceRange(); 1309d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 13150bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth // If the LHS is a plausible entity to assign to, provide a fixit hint to 13250bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth // correct common typos. 13350bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth if (CanAssign) { 13450bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth if (IsNotEqual) 13550bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth S.Diag(Loc, diag::note_inequality_comparison_to_or_assign) 13650bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth << FixItHint::CreateReplacement(Loc, "|="); 13750bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth else 13850bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth S.Diag(Loc, diag::note_equality_comparison_to_assign) 13950bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth << FixItHint::CreateReplacement(Loc, "="); 14050bf68fc9698742e36c311fc37e6e4b7de235c4bChandler Carruth } 141ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth 142ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return true; 1439d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth} 1449d8eb3b2a892697aed332f6c318a8554fc2623ceChandler Carruth 145636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlssonvoid Sema::DiagnoseUnusedExprResult(const Stmt *S) { 146d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis if (const LabelStmt *Label = dyn_cast_or_null<LabelStmt>(S)) 147d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis return DiagnoseUnusedExprResult(Label->getSubStmt()); 148d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis 149754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson const Expr *E = dyn_cast_or_null<Expr>(S); 150636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (!E) 151636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 152636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 153636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceLocation Loc; 154636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceRange R1, R2; 155d87a0cd2b3e1c9e9f01212875f4cbe5b7bb7ab57Matt Beaumont-Gay if (SourceMgr.isInSystemMacro(E->getExprLoc()) || 156d87a0cd2b3e1c9e9f01212875f4cbe5b7bb7ab57Matt Beaumont-Gay !E->isUnusedResultAWarning(Loc, R1, R2, Context)) 157636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 1581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 159419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // Okay, we have an unused result. Depending on what the base expression is, 160419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // we might want to make a more specific diagnostic. Check for one of these 161419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // cases now. 162419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner unsigned DiagID = diag::warn_unused_expr; 1634765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall if (const ExprWithCleanups *Temps = dyn_cast<ExprWithCleanups>(E)) 1644dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor E = Temps->getSubExpr(); 16534d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth if (const CXXBindTemporaryExpr *TempExpr = dyn_cast<CXXBindTemporaryExpr>(E)) 16634d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth E = TempExpr->getSubExpr(); 16712f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall 168ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth if (DiagnoseUnusedComparison(*this, E)) 169ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return; 170ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth 171f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall E = E->IgnoreParenImpCasts(); 172bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { 1730faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall if (E->getType()->isVoidType()) 1740faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall return; 1750faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall 176bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // If the callee has attribute pure, const, or warn_unused_result, warn with 177bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // a more specific message to make it clear what is happening. 178d20254f2875d0004c57ee766f258dbcee29f4841Nuno Lopes if (const Decl *FD = CE->getCalleeDecl()) { 179bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<WarnUnusedResultAttr>()) { 18042d7b2d25b6f90dc397886d05502b10ab5a8b51bMatt Beaumont-Gay Diag(Loc, diag::warn_unused_result) << R1 << R2; 181bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 182bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 183bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<PureAttr>()) { 184bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "pure"; 185bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 186bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 187bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<ConstAttr>()) { 188bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "const"; 189bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 190bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 191dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 19212f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (const ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(E)) { 1934e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().ObjCAutoRefCount && ME->isDelegateInitCall()) { 194f85e193739c953358c865005855253af4f68a497John McCall Diag(Loc, diag::err_arc_unused_init_message) << R1; 195f85e193739c953358c865005855253af4f68a497John McCall return; 196f85e193739c953358c865005855253af4f68a497John McCall } 197f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian const ObjCMethodDecl *MD = ME->getMethodDecl(); 198f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian if (MD && MD->getAttr<WarnUnusedResultAttr>()) { 19942d7b2d25b6f90dc397886d05502b10ab5a8b51bMatt Beaumont-Gay Diag(Loc, diag::warn_unused_result) << R1 << R2; 200f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian return; 201f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 202ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek } else if (const PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(E)) { 203ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek const Expr *Source = POE->getSyntacticForm(); 204ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek if (isa<ObjCSubscriptRefExpr>(Source)) 205ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek DiagID = diag::warn_unused_container_subscript_expr; 206ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek else 207ebcb57a8d298862c65043e88b2429591ab3c58d3Ted Kremenek DiagID = diag::warn_unused_property_expr; 208d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor } else if (const CXXFunctionalCastExpr *FC 209d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor = dyn_cast<CXXFunctionalCastExpr>(E)) { 210d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor if (isa<CXXConstructExpr>(FC->getSubExpr()) || 211d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor isa<CXXTemporaryObjectExpr>(FC->getSubExpr())) 212d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor return; 213f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 214209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // Diagnose "(void*) blah" as a typo for "(void) blah". 215209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall else if (const CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(E)) { 216209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall TypeSourceInfo *TI = CE->getTypeInfoAsWritten(); 217209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall QualType T = TI->getType(); 218209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 219209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // We really do want to use the non-canonical type here. 220209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall if (T == Context.VoidPtrTy) { 221209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall PointerTypeLoc TL = cast<PointerTypeLoc>(TI->getTypeLoc()); 222209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 223209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall Diag(Loc, diag::warn_unused_voidptr) 224209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall << FixItHint::CreateRemoval(TL.getStarLoc()); 225209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall return; 226209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 227209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 228209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 229351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek DiagRuntimeBehavior(Loc, 0, PDiag(DiagID) << R1 << R2); 230636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson} 231636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 232625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenkovoid Sema::ActOnStartOfCompoundStmt() { 233625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko PushCompoundScope(); 234625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko} 235625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 236625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenkovoid Sema::ActOnFinishOfCompoundStmt() { 237625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko PopCompoundScope(); 238625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko} 239625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 240625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenkosema::CompoundScopeInfo &Sema::getCurCompoundScope() const { 241625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko return getCurFunction()->CompoundScopes.back(); 242625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko} 243625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 24460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2451b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 246a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 247a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 248a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 249c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 250c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 2514e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().C99 && !getLangOpts().CPlusPlus) { 252c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 253c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 254c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 255c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 256c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 257c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 258c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 259c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 260c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 2611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 262c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 2634afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 264c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 265c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 266c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 26798414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 26898414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 269636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson // Ignore statements that are last in a statement expression. 270636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (isStmtExpr && i == NumElts - 1) 27198414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 2721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 273636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson DiagnoseUnusedExprResult(Elts[i]); 27498414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 275a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 276625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko // Check for suspicious empty body (null statement) in `for' and `while' 277625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko // statements. Don't do anything for template instantiations, this just adds 278625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko // noise. 279625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko if (NumElts != 0 && !CurrentInstantiationScope && 280625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko getCurCompoundScope().HasEmptyLoopBodies) { 281625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko for (unsigned i = 0; i != NumElts - 1; ++i) 282625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko DiagnoseEmptyLoopBody(Elts[i], Elts[i + 1]); 283625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko } 284625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 2858189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 28860d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2899ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2909ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation DotDotDotLoc, Expr *RHSVal, 29124e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 2929ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert((LHSVal != 0) && "missing expression in case statement"); 293117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 2948ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith if (getCurFunction()->SwitchStack.empty()) { 2958ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Diag(CaseLoc, diag::err_case_not_in_switch); 29624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 2978ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2994e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().CPlusPlus0x) { 3008ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // C99 6.8.4.2p3: The expression shall be an integer constant. 3018ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // However, GCC allows any evaluatable integer expression. 302282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith if (!LHSVal->isTypeDependent() && !LHSVal->isValueDependent()) { 303282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith LHSVal = VerifyIntegerConstantExpression(LHSVal).take(); 304282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith if (!LHSVal) 305282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith return StmtError(); 306282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith } 307117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 3088ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // GCC extension: The expression shall be an integer constant. 309117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 310282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith if (RHSVal && !RHSVal->isTypeDependent() && !RHSVal->isValueDependent()) { 311282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith RHSVal = VerifyIntegerConstantExpression(RHSVal).take(); 312282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith // Recover from an error by just forgetting about it. 3138ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 3148a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 316dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc, DotDotDotLoc, 317dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ColonLoc); 318781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(CS); 319117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 32224e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 3239ae2f076ca5ab1feb3ba95629099ec2319833701John McCallvoid Sema::ActOnCaseStmtBody(Stmt *caseStmt, Stmt *SubStmt) { 3245440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth DiagnoseUnusedExprResult(SubStmt); 3255440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth 32624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 32724e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 32824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 32924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 33060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 3311eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 3329ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SubStmt, Scope *CurScope) { 3335440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth DiagnoseUnusedExprResult(SubStmt); 3345440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth 335781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 3360fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 337117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 3380fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 339117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 340dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, ColonLoc, SubStmt); 341781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(DS); 342117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 3435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 34560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 34657ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerSema::ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 34757ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation ColonLoc, Stmt *SubStmt) { 348ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // If the label was multiply defined, reject it now. 349ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner if (TheDecl->getStmt()) { 350ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << TheDecl->getDeclName(); 351ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(TheDecl->getLocation(), diag::note_previous_definition); 352de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 3535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 354de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 355ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // Otherwise, things are good. Fill in the declaration and return it. 356ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner LabelStmt *LS = new (Context) LabelStmt(IdentLoc, TheDecl, SubStmt); 357ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setStmt(LS); 358203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara if (!TheDecl->isGnuLocal()) 359203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara TheDecl->setLocation(IdentLoc); 360ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(LS); 3615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 363534986f2b21e6050bf00163cd6423fd92155a6edRichard SmithStmtResult Sema::ActOnAttributedStmt(SourceLocation AttrLoc, 364534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith const AttrVec &Attrs, 365534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith Stmt *SubStmt) { 366534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith // Fill in the declaration and return it. Variable length will require to 367534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith // change this to AttributedStmt::Create(Context, ....); 368534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith // and probably using ArrayRef 369534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith AttributedStmt *LS = new (Context) AttributedStmt(AttrLoc, Attrs, SubStmt); 370534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith return Owned(LS); 371534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith} 372534986f2b21e6050bf00163cd6423fd92155a6edRichard Smith 37360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 374d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, Decl *CondVar, 37544aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *thenStmt, SourceLocation ElseLoc, 37644aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *elseStmt) { 37760d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(CondVal.release()); 3781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3798cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor VarDecl *ConditionVar = 0; 380d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 381d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 382586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, IfLoc, true); 38399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 38499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 3858cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor } 38699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 38799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 38899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 389dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 390754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(thenStmt); 3915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3929ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!elseStmt) { 393625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko DiagnoseEmptyStmtBody(ConditionExpr->getLocEnd(), thenStmt, 394625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko diag::warn_empty_if_body); 3952d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 3962d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 397754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(elseStmt); 3981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 399dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) IfStmt(Context, IfLoc, ConditionVar, ConditionExpr, 40044aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis thenStmt, ElseLoc, elseStmt)); 4015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 403f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 404f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 405f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 406f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 407f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 4081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, 409f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 410f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 411f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 412f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 4139f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(NewWidth); 414f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 415f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor 416f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // If the input was signed and negative and the output is 417f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // unsigned, don't bother to warn: this is implementation-defined 418f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // behavior. 419f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 420f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 421f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 422f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 4239f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.trunc(NewWidth); 424b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 4259f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.extend(Val.getBitWidth()); 426b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 427f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 428d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 4291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 430f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 431f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 4329f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(NewWidth); 433b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 434f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 435f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 436f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 437dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // We don't diagnose this overflow, because it is implementation-defined 4382853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // behavior. 4392853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 440f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 441f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 442f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 443f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 444f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 4450471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 4460471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 4470471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 4480471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 4490471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 4500471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 4510e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 4520e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 4530e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 4540e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 4550471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 4560471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 4570471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 4580471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 4590471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 4600471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 4610471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 462764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 463764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 464764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 465764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 466764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 467764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 468764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 469764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 470764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 471764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 472764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 473764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 474764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 475764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 476ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// CmpEnumVals - Comparison predicate for sorting enumeration values. 477ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 478ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool CmpEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 479ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 480ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 481ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first < rhs.first; 482ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 483ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 484ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// EqEnumVals - Comparison preficate for uniqing enumeration values. 485ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 486ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool EqEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 487ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 488ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 489ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first == rhs.first; 490ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 491ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 4925f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// GetTypeBeforeIntegralPromotion - Returns the pre-promotion type of 4935f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// potentially integral-promoted expression @p expr. 494a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCallstatic QualType GetTypeBeforeIntegralPromotion(Expr *&expr) { 495a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(expr)) 496a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall expr = cleanups->getSubExpr(); 497a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall while (ImplicitCastExpr *impcast = dyn_cast<ImplicitCastExpr>(expr)) { 498a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (impcast->getCastKind() != CK_IntegralCast) break; 499a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall expr = impcast->getSubExpr(); 5005f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 5015f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return expr->getType(); 5025f04881eb025f61396d0555d8173730fe2759e0aChris Lattner} 5035f04881eb025f61396d0555d8173730fe2759e0aChris Lattner 50460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 505dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, Expr *Cond, 506d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall Decl *CondVar) { 50760d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult; 5089ae2f076ca5ab1feb3ba95629099ec2319833701John McCall 509586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor VarDecl *ConditionVar = 0; 510d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 511d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 5129ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult = CheckConditionVariable(ConditionVar, SourceLocation(), false); 5139ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 514586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 515dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 5169ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.release(); 517586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 518dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 5199ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Cond) 520586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 521dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 5229ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult 523ceccab908bd7824751b1def127272ec04dd4732bEli Friedman = ConvertToIntegralOrEnumerationType(SwitchLoc, Cond, 524c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_typecheck_statement_requires_integer), 525c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_incomplete_class_type) 5269ae2f076ca5ab1feb3ba95629099ec2319833701John McCall << Cond->getSourceRange(), 527c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_explicit_conversion), 528c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::note_switch_conversion), 529c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_multiple_conversions), 5306bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(diag::note_switch_conversion), 531f39aec17b89f8f0dd78e78c50ad2fa08f12272e3Richard Smith PDiag(0), 532f39aec17b89f8f0dd78e78c50ad2fa08f12272e3Richard Smith /*AllowScopedEnumerations*/ true); 5339ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) return StmtError(); 5349ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 535dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 536a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 537a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall CondResult = UsualUnaryConversions(Cond); 538a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (CondResult.isInvalid()) return StmtError(); 539a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall Cond = CondResult.take(); 540a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall 541d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (!CondVar) { 542b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, SwitchLoc); 5434765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall CondResult = MaybeCreateExprWithCleanups(Cond); 5449ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 545586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 5469ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 547586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 548b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 549781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchIntoScope(); 550dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 5519ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = new (Context) SwitchStmt(Context, ConditionVar, Cond); 552781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.push_back(SS); 553586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return Owned(SS); 5547e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner} 5557e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner 55628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greifstatic void AdjustAPSInt(llvm::APSInt &Val, unsigned BitWidth, bool IsSigned) { 55728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif if (Val.getBitWidth() < BitWidth) 5589f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(BitWidth); 55928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif else if (Val.getBitWidth() > BitWidth) 5609f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(BitWidth); 56128164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Val.setIsSigned(IsSigned); 56228164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif} 56328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif 56460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 5659ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, Stmt *Switch, 5669ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *BodyStmt) { 5679ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = cast<SwitchStmt>(Switch); 568781472fe99a120098c631b0cbe33c89f8cef5e70John McCall assert(SS == getCurFunction()->SwitchStack.back() && 569781472fe99a120098c631b0cbe33c89f8cef5e70John McCall "switch stack missing push/pop!"); 570de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 5719dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 572781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.pop_back(); 573c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 574f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 575a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (!CondExpr) return StmtError(); 576de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 577a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor QualType CondType = CondExpr->getType(); 578a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall 579a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall Expr *CondExprBeforePromotion = CondExpr; 580a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall QualType CondTypeBeforePromotion = 581a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall GetTypeBeforeIntegralPromotion(CondExprBeforePromotion); 58284fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor 5835f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // C++ 6.4.2.p2: 5845f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // Integral promotions are performed (on the switch condition). 5855f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // 5865f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // A case value unrepresentable by the original switch condition 5875f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // type (before the promotion) doesn't make sense, even when it can 5885f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // be represented by the promoted type. Therefore we need to find 5895f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // the pre-promotion type of the switch condition. 59012356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondExpr->isTypeDependent()) { 591acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // We have already converted the expression to an integral or enumeration 592dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // type, when we started the switch statement. If we don't have an 593acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // appropriate type now, just return an error. 594acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor if (!CondType->isIntegralOrEnumerationType()) 59512356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan return StmtError(); 59612356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan 5972b334bb3126a67895813e49e6228dad4aec0b4d6Chris Lattner if (CondExpr->isKnownToHaveBooleanValue()) { 59812356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(bool_expr) {...} is often a programmer error, e.g. 59912356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(n && mask) { ... } // Doh - should be "n & mask". 60012356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // One can always use an if statement instead of switch(bool_expr). 60112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::warn_bool_switch_condition) 60212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondExpr->getSourceRange(); 60312356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 604c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 605de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 606f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 607f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 6081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HasDependentValue 609dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 6101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned CondWidth 6111d6ab7af99a1fc059a6aa5da083640c1d94b07f7Chris Lattner = HasDependentValue ? 0 : Context.getIntWidth(CondTypeBeforePromotion); 612575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool CondIsSigned 613575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor = CondTypeBeforePromotion->isSignedIntegerOrEnumerationType(); 6141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 615f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 616f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 617f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 6185f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner typedef SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 6190471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 6201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 621f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 622ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRangesTy; 623ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy CaseRanges; 6241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 625f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 6261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 627b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 6281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 629dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 630c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 6311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 632c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 633f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 634f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 6355f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 636de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 637f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 638390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 639390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 640390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 641b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 642c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 643f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 6441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 645f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 646f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 6471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6481e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 649dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 650dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 651dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 652dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 653dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6558ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith llvm::APSInt LoVal; 6561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6574e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().CPlusPlus0x) { 6588ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // C++11 [stmt.switch]p2: the constant-expression shall be a converted 6598ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // constant expression of the promoted type of the switch condition. 6608ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith ExprResult ConvLo = 6618ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith CheckConvertedConstantExpression(Lo, CondType, LoVal, CCEK_CaseValue); 6628ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith if (ConvLo.isInvalid()) { 6638ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith CaseListIsErroneous = true; 6648ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith continue; 6658ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 6668ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Lo = ConvLo.take(); 6678ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } else { 6688ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // We already verified that the expression has a i-c-e value (C99 6698ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // 6.8.4.2p3) - get that value now. 6708ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith LoVal = Lo->EvaluateKnownConstInt(Context); 6718ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith 6728ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // If the LHS is not the same type as the condition, insert an implicit 6738ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // cast. 6748ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Lo = DefaultLvalueConversion(Lo).take(); 6758ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Lo = ImpCastExprToType(Lo, CondType, CK_IntegralCast).take(); 6768ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 6778ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith 6788ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // Convert the value to the same width/sign as the condition had prior to 6798ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // integral promotions. 6808ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // 6818ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // FIXME: This causes us to reject valid code: 6828ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // switch ((char)c) { case 256: case 0: return 0; } 6838ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // Here we claim there is a duplicated condition value, but there is not. 684f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 68528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Lo->getLocStart(), 686f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 6876c36be5b383875b490684bcf439d6d427298c1afChris Lattner 6881e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 6891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 690b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 691dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 6921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CS->getRHS()->isTypeDependent() || 693dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 694dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 695dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 696dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 697f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 6981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 699b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 700f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 701f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 702b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 703dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 7040fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // If we don't have a default statement, check whether the 7050fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // condition is constant. 7060fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt ConstantCondValue; 7070fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool HasConstantCond = false; 7080fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!HasDependentValue && !TheDefaultStmt) { 70951f4708c00110940ca3f337961915f2ca1668375Richard Smith HasConstantCond 71080d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith = CondExprBeforePromotion->EvaluateAsInt(ConstantCondValue, Context, 71180d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith Expr::SE_AllowSideEffects); 71280d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith assert(!HasConstantCond || 71380d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith (ConstantCondValue.getBitWidth() == CondWidth && 71480d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith ConstantCondValue.isSigned() == CondIsSigned)); 7150fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 71680d4b55db94db2172a04617d1a80feca6bbcea5cRichard Smith bool ShouldCheckConstantCond = HasConstantCond; 7170fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 718dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 719dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 720dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 721dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 7220fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (unsigned i = 0, e = CaseVals.size(); i != e; ++i) { 7230fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 7240fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CaseVals[i].first == ConstantCondValue) 7250fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 7260fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7270fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (i != 0 && CaseVals[i].first == CaseVals[i-1].first) { 728dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 7291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(CaseVals[i].second->getLHS()->getLocStart(), 7300fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall diag::err_duplicate_case) << CaseVals[i].first.toString(10); 7310fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CaseVals[i-1].second->getLHS()->getLocStart(), 732dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 733390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 734390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 735dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 736dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7376efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 738b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 7391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 740dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 741dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 742dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 743dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 744dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 745dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 7461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 747dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 748dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 749dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 7500fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt &LoVal = CaseRanges[i].first; 751dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 752dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 7538ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith llvm::APSInt HiVal; 7548ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith 7554e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().CPlusPlus0x) { 7568ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // C++11 [stmt.switch]p2: the constant-expression shall be a converted 7578ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // constant expression of the promoted type of the switch condition. 7588ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith ExprResult ConvHi = 7598ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith CheckConvertedConstantExpression(Hi, CondType, HiVal, 7608ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith CCEK_CaseValue); 7618ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith if (ConvHi.isInvalid()) { 7628ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith CaseListIsErroneous = true; 7638ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith continue; 7648ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 7658ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Hi = ConvHi.take(); 7668ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } else { 7678ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith HiVal = Hi->EvaluateKnownConstInt(Context); 7688ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith 7698ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // If the RHS is not the same type as the condition, insert an 7708ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith // implicit cast. 7718ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Hi = DefaultLvalueConversion(Hi).take(); 7728ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith Hi = ImpCastExprToType(Hi, CondType, CK_IntegralCast).take(); 7738ef7b203332b0c8d65876a1f5e6d1db4e6f40e4bRichard Smith } 7741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 775dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 776dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 77728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocStart(), 778dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 7791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 780dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 7811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 782dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 7830fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (LoVal > HiVal) { 784dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 785dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 78628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocEnd()); 787dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 788dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 789dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 790dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7910fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7920fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 7930fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall LoVal <= ConstantCondValue && 7940fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue <= HiVal) 7950fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 7960fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 797dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 7980471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 7991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 800dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 801dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 802dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 803dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 804dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 805dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 806dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 8071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 808dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 809dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 810dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 811dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 8121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 813dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 814dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 815dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 816dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 817dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 818dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 819dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 820dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 821dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 8221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 823dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 824dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 825dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 826dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 827dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 828dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 8291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 830dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 831dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 832dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 833dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 834dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 835dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 8361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 837dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 838dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 839dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 840dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 8411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(OverlapStmt->getLHS()->getLocStart(), 842dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 843390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 844390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 845dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 846dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 8470471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 848b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 849ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 8500fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Complain if we have a constant condition and we didn't find a match. 8510fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!CaseListIsErroneous && ShouldCheckConstantCond) { 8520fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // TODO: it would be nice if we printed enums as enums, chars as 8530fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // chars, etc. 8540fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CondExpr->getExprLoc(), diag::warn_missing_case_for_condition) 8550fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ConstantCondValue.toString(10) 8560fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << CondExpr->getSourceRange(); 8570fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 8580fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 8590fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Check to see if switch is over an Enum and handles all of its 860559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // values. We only issue a warning if there is not 'default:', but 861559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // we still do the analysis to preserve this information in the AST 862559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // (which can be used by flow-based analyes). 8630fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // 864ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner const EnumType *ET = CondTypeBeforePromotion->getAs<EnumType>(); 865559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 866ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // If switch has default case, then ignore it. 867559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!CaseListIsErroneous && !HasConstantCond && ET) { 868ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const EnumDecl *ED = ET->getDecl(); 8695f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner typedef SmallVector<std::pair<llvm::APSInt, EnumConstantDecl*>, 64> 87058f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet EnumValsTy; 871ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy EnumVals; 872ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 8730fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Gather all enum values, set their type and sort them, 8740fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // allowing easier comparison with CaseVals. 8750fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (EnumDecl::enumerator_iterator EDI = ED->enumerator_begin(); 87628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EDI != ED->enumerator_end(); ++EDI) { 87728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif llvm::APSInt Val = EDI->getInitVal(); 87828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Val, CondWidth, CondIsSigned); 87928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EnumVals.push_back(std::make_pair(Val, *EDI)); 880ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 881ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor std::stable_sort(EnumVals.begin(), EnumVals.end(), CmpEnumVals); 8820fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall EnumValsTy::iterator EIend = 8830fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall std::unique(EnumVals.begin(), EnumVals.end(), EqEnumVals); 884559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 885559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // See which case values aren't in enum. 8869366750a5a97c8aeae1df4898ea849b087865195David Blaikie EnumValsTy::const_iterator EI = EnumVals.begin(); 8879366750a5a97c8aeae1df4898ea849b087865195David Blaikie for (CaseValsTy::const_iterator CI = CaseVals.begin(); 8889366750a5a97c8aeae1df4898ea849b087865195David Blaikie CI != CaseVals.end(); CI++) { 8899366750a5a97c8aeae1df4898ea849b087865195David Blaikie while (EI != EIend && EI->first < CI->first) 8909366750a5a97c8aeae1df4898ea849b087865195David Blaikie EI++; 8919366750a5a97c8aeae1df4898ea849b087865195David Blaikie if (EI == EIend || EI->first > CI->first) 8929366750a5a97c8aeae1df4898ea849b087865195David Blaikie Diag(CI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 89354faba4f7f3f0e8f1376da1c459312596ad5486dFariborz Jahanian << CondTypeBeforePromotion; 8949366750a5a97c8aeae1df4898ea849b087865195David Blaikie } 8959366750a5a97c8aeae1df4898ea849b087865195David Blaikie // See which of case ranges aren't in enum 8969366750a5a97c8aeae1df4898ea849b087865195David Blaikie EI = EnumVals.begin(); 8979366750a5a97c8aeae1df4898ea849b087865195David Blaikie for (CaseRangesTy::const_iterator RI = CaseRanges.begin(); 8989366750a5a97c8aeae1df4898ea849b087865195David Blaikie RI != CaseRanges.end() && EI != EIend; RI++) { 8999366750a5a97c8aeae1df4898ea849b087865195David Blaikie while (EI != EIend && EI->first < RI->first) 9009366750a5a97c8aeae1df4898ea849b087865195David Blaikie EI++; 9019366750a5a97c8aeae1df4898ea849b087865195David Blaikie 9029366750a5a97c8aeae1df4898ea849b087865195David Blaikie if (EI == EIend || EI->first != RI->first) { 9039366750a5a97c8aeae1df4898ea849b087865195David Blaikie Diag(RI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 90454faba4f7f3f0e8f1376da1c459312596ad5486dFariborz Jahanian << CondTypeBeforePromotion; 90547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 906e0ba9d1beeba01a96808c2fc61f9ca89acec313bTed Kremenek 9079366750a5a97c8aeae1df4898ea849b087865195David Blaikie llvm::APSInt Hi = 9089366750a5a97c8aeae1df4898ea849b087865195David Blaikie RI->second->getRHS()->EvaluateKnownConstInt(Context); 9099366750a5a97c8aeae1df4898ea849b087865195David Blaikie AdjustAPSInt(Hi, CondWidth, CondIsSigned); 9109366750a5a97c8aeae1df4898ea849b087865195David Blaikie while (EI != EIend && EI->first < Hi) 9119366750a5a97c8aeae1df4898ea849b087865195David Blaikie EI++; 9129366750a5a97c8aeae1df4898ea849b087865195David Blaikie if (EI == EIend || EI->first != Hi) 9139366750a5a97c8aeae1df4898ea849b087865195David Blaikie Diag(RI->second->getRHS()->getExprLoc(), diag::warn_not_in_enum) 91454faba4f7f3f0e8f1376da1c459312596ad5486dFariborz Jahanian << CondTypeBeforePromotion; 915ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 916dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 917559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Check which enum vals aren't in switch 918ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseValsTy::const_iterator CI = CaseVals.begin(); 919ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy::const_iterator RI = CaseRanges.begin(); 920559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek bool hasCasesNotInSwitch = false; 921559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 9225f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeclarationName,8> UnhandledNames; 923dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9249366750a5a97c8aeae1df4898ea849b087865195David Blaikie for (EI = EnumVals.begin(); EI != EIend; EI++){ 925ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Drop unneeded case values 926ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt CIVal; 927ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (CI != CaseVals.end() && CI->first < EI->first) 928ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CI++; 929dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 930ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (CI != CaseVals.end() && CI->first == EI->first) 931ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor continue; 932ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 933559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Drop unneeded case ranges 934ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (; RI != CaseRanges.end(); RI++) { 935a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith llvm::APSInt Hi = 936a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith RI->second->getRHS()->EvaluateKnownConstInt(Context); 93728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 938ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI->first <= Hi) 939ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor break; 940ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 941ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 942559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (RI == CaseRanges.end() || EI->first < RI->first) { 94347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek hasCasesNotInSwitch = true; 94431ceb61172bca7ebc3fb90e9125864c7a29c55c0David Blaikie UnhandledNames.push_back(EI->second->getDeclName()); 94547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 946ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 947dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 948585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie if (TheDefaultStmt && UnhandledNames.empty()) 949585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie Diag(TheDefaultStmt->getDefaultLoc(), diag::warn_unreachable_default); 95031ceb61172bca7ebc3fb90e9125864c7a29c55c0David Blaikie 951ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Produce a nice diagnostic if multiple values aren't handled. 952ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner switch (UnhandledNames.size()) { 953ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 0: break; 954ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 1: 955585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie Diag(CondExpr->getExprLoc(), TheDefaultStmt 956585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie ? diag::warn_def_missing_case1 : diag::warn_missing_case1) 957ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0]; 958ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 959ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 2: 960585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie Diag(CondExpr->getExprLoc(), TheDefaultStmt 961585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie ? diag::warn_def_missing_case2 : diag::warn_missing_case2) 962ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1]; 963ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 964ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 3: 965585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie Diag(CondExpr->getExprLoc(), TheDefaultStmt 966585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie ? diag::warn_def_missing_case3 : diag::warn_missing_case3) 967ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 968ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 969ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner default: 970585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie Diag(CondExpr->getExprLoc(), TheDefaultStmt 971585d7795c2dddaa510b3bb1b3b18633bfcfdf643David Blaikie ? diag::warn_def_missing_cases : diag::warn_missing_cases) 972ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << (unsigned)UnhandledNames.size() 973ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 974ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 975ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner } 976559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 977559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!hasCasesNotInSwitch) 97847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek SS->setAllEnumCasesCovered(); 979ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 980b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 981dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 982625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko DiagnoseEmptyStmtBody(CondExpr->getLocEnd(), BodyStmt, 983625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko diag::warn_empty_switch_body); 984625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 985390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 986390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 987b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 988de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 989de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 990de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 9915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 99360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 994dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, 9959ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Decl *CondVar, Stmt *Body) { 99660d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(Cond.release()); 997dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9985656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor VarDecl *ConditionVar = 0; 999d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 1000d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 1001586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, WhileLoc, true); 100299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 100399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 10045656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor } 10059ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *ConditionExpr = CondResult.take(); 100699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 100799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 1008dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 10099ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 10101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1011625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko if (isa<NullStmt>(Body)) 1012625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko getCurCompoundScope().setHasEmptyLoopBodies(); 1013625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 101443dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor return Owned(new (Context) WhileStmt(Context, ConditionVar, ConditionExpr, 10159ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Body, WhileLoc)); 10165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 101860d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 10199ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1020989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 10219ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Cond, SourceLocation CondRParen) { 10229ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert(Cond && "ActOnDoStmt(): missing expression"); 1023f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 1024429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult CondResult = CheckBooleanCondition(Cond, DoLoc); 1025429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (CondResult.isInvalid() || CondResult.isInvalid()) 10265a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 1027429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Cond = CondResult.take(); 10285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1029b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, DoLoc); 1030429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CondResult = MaybeCreateExprWithCleanups(Cond); 10319ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 1032586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 10339ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 1034dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 10359ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 1036754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 10379ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) DoStmt(Body, Cond, DoLoc, WhileLoc, CondRParen)); 10385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 104060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1041f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 10429ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, FullExprArg second, Decl *secondVar, 104399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor FullExprArg third, 10449ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 10454e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().CPlusPlus) { 10465921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 1047f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 1048f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 1049f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 10505921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 10515921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 10525921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 1053b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD && VD->isLocalVarDecl() && !VD->hasLocalStorage()) 10545921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 10555921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 10565921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 10575921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 10585921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 1059ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 10605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 106199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 106260d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult SecondResult(second.release()); 106399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor VarDecl *ConditionVar = 0; 1064d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (secondVar) { 1065d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(secondVar); 1066586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor SecondResult = CheckConditionVariable(ConditionVar, ForLoc, true); 106799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (SecondResult.isInvalid()) 106899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 106999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor } 1070dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 107199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Third = third.release().takeAs<Expr>(); 1072dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 10733af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(First); 10743af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(Third); 1075754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(Body); 1076754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 1077625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko if (isa<NullStmt>(Body)) 1078625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko getCurCompoundScope().setHasEmptyLoopBodies(); 1079625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 1080dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) ForStmt(Context, First, 1081dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi SecondResult.take(), ConditionVar, 1082dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Third, Body, ForLoc, LParenLoc, 108343dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor RParenLoc)); 10845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1086f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// In an Objective C collection iteration statement: 1087f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// for (x in y) 1088f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// x can be an arbitrary l-value expression. Bind it up as a 1089f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// full-expression. 1090f6a1648197562e0b133440d612d9af297d0a86ccJohn McCallStmtResult Sema::ActOnForEachLValueExpr(Expr *E) { 109129bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall // Reduce placeholder expressions here. Note that this rejects the 109229bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall // use of pseudo-object l-values in this position. 109329bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall ExprResult result = CheckPlaceholderExpr(E); 109429bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall if (result.isInvalid()) return StmtError(); 109529bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall E = result.take(); 109629bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall 1097f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall CheckImplicitConversions(E); 109829bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall 109929bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall result = MaybeCreateExprWithCleanups(E); 110029bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall if (result.isInvalid()) return StmtError(); 110129bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall 110229bbd1a33edfd3c81c35d5076530c2867a05bddcJohn McCall return Owned(static_cast<Stmt*>(result.take())); 1103f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall} 1104f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall 1105990567cb60e8530ba01b41d4e056e32b44b95ec0John McCallExprResult 1106990567cb60e8530ba01b41d4e056e32b44b95ec0John McCallSema::ActOnObjCForCollectionOperand(SourceLocation forLoc, Expr *collection) { 1107990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall assert(collection); 1108990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1109990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Bail out early if we've got a type-dependent expression. 1110990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (collection->isTypeDependent()) return Owned(collection); 1111990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1112990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Perform normal l-value conversion. 1113990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ExprResult result = DefaultFunctionArrayLvalueConversion(collection); 1114990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (result.isInvalid()) 1115990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return ExprError(); 1116990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall collection = result.take(); 1117990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1118990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // The operand needs to have object-pointer type. 1119990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // TODO: should we do a contextual conversion? 1120990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall const ObjCObjectPointerType *pointerType = 1121990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall collection->getType()->getAs<ObjCObjectPointerType>(); 1122990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!pointerType) 1123990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return Diag(forLoc, diag::err_collection_expr_type) 1124990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall << collection->getType() << collection->getSourceRange(); 1125990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1126990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Check that the operand provides 1127990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // - countByEnumeratingWithState:objects:count: 1128990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall const ObjCObjectType *objectType = pointerType->getObjectType(); 1129990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ObjCInterfaceDecl *iface = objectType->getInterface(); 1130990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1131990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If we have a forward-declared type, we can't do this check. 1132b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor // Under ARC, it is an error not to have a forward-declared class. 1133b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor if (iface && 1134b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor RequireCompleteType(forLoc, QualType(objectType, 0), 11354e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie getLangOpts().ObjCAutoRefCount 1136b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor ? PDiag(diag::err_arc_collection_forward) 1137b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor << collection->getSourceRange() 1138b3029960632ca8a3248e74770eda64d6c16f7246Douglas Gregor : PDiag(0))) { 1139990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Otherwise, if we have any useful type information, check that 1140990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // the type declares the appropriate method. 1141990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } else if (iface || !objectType->qual_empty()) { 1142990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall IdentifierInfo *selectorIdents[] = { 1143990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("countByEnumeratingWithState"), 1144990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("objects"), 1145990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("count") 1146990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall }; 1147990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Selector selector = Context.Selectors.getSelector(3, &selectorIdents[0]); 1148990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1149990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ObjCMethodDecl *method = 0; 1150990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1151990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If there's an interface, look in both the public and private APIs. 1152990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (iface) { 1153990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall method = iface->lookupInstanceMethod(selector); 1154990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) method = LookupPrivateInstanceMethod(selector, iface); 1155990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1156990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1157990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Also check protocol qualifiers. 1158990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) 1159990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall method = LookupMethodInQualifiedType(selector, pointerType, 1160990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall /*instance*/ true); 1161990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1162990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If we didn't find it anywhere, give up. 1163990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) { 1164990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Diag(forLoc, diag::warn_collection_expr_type) 1165990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall << collection->getType() << selector << collection->getSourceRange(); 1166990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1167990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1168990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // TODO: check for an incompatible signature? 1169990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1170990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1171990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Wrap up any cleanups in the expression. 1172990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return Owned(MaybeCreateExprWithCleanups(collection)); 1173990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall} 1174990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 117560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1176f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 1177f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 11789ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, Expr *Second, 11799ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 118020552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 118120552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 118220552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 11837e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 1184f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 1185f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 1186f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 1187f85e193739c953358c865005855253af4f68a497John McCall VarDecl *D = cast<VarDecl>(DS->getSingleDecl()); 1188f85e193739c953358c865005855253af4f68a497John McCall FirstType = D->getType(); 1189f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 1190f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 1191f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 1192f85e193739c953358c865005855253af4f68a497John McCall if (!D->hasLocalStorage()) 1193f85e193739c953358c865005855253af4f68a497John McCall return StmtError(Diag(D->getLocation(), 1194f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 11951fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 1196c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor Expr *FirstE = cast<Expr>(First); 11977eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (!FirstE->isTypeDependent() && !FirstE->isLValue()) 1198f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 1199f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 1200f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 12011fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 12021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FirstType = static_cast<Expr*>(First)->getType(); 12031fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 1204c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (!FirstType->isDependentType() && 1205c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor !FirstType->isObjCObjectPointerType() && 1206a5e42a82ce055f29f3733f3a1f10da6cb9877deeFariborz Jahanian !FirstType->isBlockPointerType()) 1207dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 1208d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 12093ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 1210990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 12118189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 12128189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 12133ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 12145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1215ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithnamespace { 1216ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1217ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithenum BeginEndFunction { 1218ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_begin, 1219ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_end 1220ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith}; 1221ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1222ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Build a variable declaration for a for-range statement. 1223ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic VarDecl *BuildForRangeVarDecl(Sema &SemaRef, SourceLocation Loc, 1224ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType Type, const char *Name) { 1225ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclContext *DC = SemaRef.CurContext; 1226ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IdentifierInfo *II = &SemaRef.PP.getIdentifierTable().get(Name); 1227ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TypeSourceInfo *TInfo = SemaRef.Context.getTrivialTypeSourceInfo(Type, Loc); 1228ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *Decl = VarDecl::Create(SemaRef.Context, DC, Loc, Loc, II, Type, 1229ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TInfo, SC_Auto, SC_None); 1230b403d6d746239095a2c7bac958c924d92434e2b4Richard Smith Decl->setImplicit(); 1231ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return Decl; 1232ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1233ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1234ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Finish building a variable declaration for a for-range statement. 1235ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// \return true if an error occurs. 1236ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic bool FinishForRangeVarDecl(Sema &SemaRef, VarDecl *Decl, Expr *Init, 1237ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc, int diag) { 1238ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Deduce the type for the iterator variable now rather than leaving it to 1239ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // AddInitializerToDecl, so we can produce a more suitable diagnostic. 1240ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TypeSourceInfo *InitTSI = 0; 124162b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl if ((!isa<InitListExpr>(Init) && Init->getType()->isVoidType()) || 1242b832f6dea893f25b40500a04781286236281cb20Sebastian Redl SemaRef.DeduceAutoType(Decl->getTypeSourceInfo(), Init, InitTSI) == 1243b832f6dea893f25b40500a04781286236281cb20Sebastian Redl Sema::DAR_Failed) 1244ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Loc, diag) << Init->getType(); 1245ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!InitTSI) { 1246ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setInvalidDecl(); 1247ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return true; 1248ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1249ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setTypeSourceInfo(InitTSI); 1250ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setType(InitTSI->getType()); 1251ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1252f85e193739c953358c865005855253af4f68a497John McCall // In ARC, infer lifetime. 1253f85e193739c953358c865005855253af4f68a497John McCall // FIXME: ARC may want to turn this into 'const __unsafe_unretained' if 1254f85e193739c953358c865005855253af4f68a497John McCall // we're doing the equivalent of fast iteration. 12554e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (SemaRef.getLangOpts().ObjCAutoRefCount && 1256f85e193739c953358c865005855253af4f68a497John McCall SemaRef.inferObjCARCLifetime(Decl)) 1257f85e193739c953358c865005855253af4f68a497John McCall Decl->setInvalidDecl(); 1258f85e193739c953358c865005855253af4f68a497John McCall 1259ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.AddInitializerToDecl(Decl, Init, /*DirectInit=*/false, 1260ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TypeMayContainAuto=*/false); 1261ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.FinalizeDeclaration(Decl); 1262b403d6d746239095a2c7bac958c924d92434e2b4Richard Smith SemaRef.CurContext->addHiddenDecl(Decl); 1263ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return false; 1264ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1265ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1266ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Produce a note indicating which begin/end function was implicitly called 1267ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// by a C++0x for-range statement. This is often not obvious from the code, 1268ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// nor from the diagnostics produced when analysing the implicit expressions 1269ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// required in a for-range statement. 1270ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithvoid NoteForRangeBeginEndFunction(Sema &SemaRef, Expr *E, 1271ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndFunction BEF) { 1272ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr *CE = dyn_cast<CallExpr>(E); 1273ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!CE) 1274ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return; 1275ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FunctionDecl *D = dyn_cast<FunctionDecl>(CE->getCalleeDecl()); 1276ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!D) 1277ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return; 1278ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc = D->getLocation(); 1279ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1280ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith std::string Description; 1281ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith bool IsTemplate = false; 1282ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FunctionTemplateDecl *FunTmpl = D->getPrimaryTemplate()) { 1283ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Description = SemaRef.getTemplateArgumentBindingsText( 1284ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FunTmpl->getTemplateParameters(), *D->getTemplateSpecializationArgs()); 1285ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IsTemplate = true; 1286ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1287ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1288ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Loc, diag::note_for_range_begin_end) 1289ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << BEF << IsTemplate << Description << E->getType(); 1290ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1291ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1292ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Build a call to 'begin' or 'end' for a C++0x for-range statement. If the 1293ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// given LookupResult is non-empty, it is assumed to describe a member which 1294ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// will be invoked. Otherwise, the function will be found via argument 1295ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// dependent lookup. 1296ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic ExprResult BuildForRangeBeginEndCall(Sema &SemaRef, Scope *S, 1297ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc, 1298ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *Decl, 1299ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndFunction BEF, 1300ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith const DeclarationNameInfo &NameInfo, 1301ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult &MemberLookup, 1302ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Range) { 1303ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult CallExpr; 1304ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!MemberLookup.empty()) { 1305ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult MemberRef = 1306ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.BuildMemberReferenceExpr(Range, Range->getType(), Loc, 1307ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*IsPtr=*/false, CXXScopeSpec(), 1308e4b92761b43ced611c417ae478568610f1ad7b1eAbramo Bagnara /*TemplateKWLoc=*/SourceLocation(), 1309e4b92761b43ced611c417ae478568610f1ad7b1eAbramo Bagnara /*FirstQualifierInScope=*/0, 1310e4b92761b43ced611c417ae478568610f1ad7b1eAbramo Bagnara MemberLookup, 1311ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TemplateArgs=*/0); 1312ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (MemberRef.isInvalid()) 1313ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1314ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr = SemaRef.ActOnCallExpr(S, MemberRef.get(), Loc, MultiExprArg(), 1315ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Loc, 0); 1316ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CallExpr.isInvalid()) 1317ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1318ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1319ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedSet<0> FoundNames; 1320ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // C++0x [stmt.ranged]p1: For the purposes of this name lookup, namespace 1321ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // std is an associated namespace. 1322ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedLookupExpr *Fn = 1323ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedLookupExpr::Create(SemaRef.Context, /*NamingClass=*/0, 1324ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NestedNameSpecifierLoc(), NameInfo, 1325ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*NeedsADL=*/true, /*Overloaded=*/false, 1326ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FoundNames.begin(), FoundNames.end(), 1327ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*LookInStdNamespace=*/true); 1328ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr = SemaRef.BuildOverloadedCallExpr(S, Fn, Fn, Loc, &Range, 1, Loc, 13293943b1c0215da2a4171dd6c696cb75d19e5a04a9Kaelyn Uhrain 0, /*AllowTypoCorrection=*/false); 1330ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CallExpr.isInvalid()) { 1331ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Range->getLocStart(), diag::note_for_range_type) 1332ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << Range->getType(); 1333ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1334ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1335ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1336ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(SemaRef, Decl, CallExpr.get(), Loc, 1337ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1338ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(SemaRef, CallExpr.get(), BEF); 1339ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1340ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1341ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return CallExpr; 1342ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1343ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1344ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1345ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1346ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// ActOnCXXForRangeStmt - Check and build a C++0x for-range statement. 1347ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1348ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// C++0x [stmt.ranged]: 1349ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// A range-based for statement is equivalent to 1350ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1351ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// { 1352ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// auto && __range = range-init; 1353ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// for ( auto __begin = begin-expr, 1354ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// __end = end-expr; 1355ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// __begin != __end; 1356ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// ++__begin ) { 1357ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// for-range-declaration = *__begin; 1358ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// statement 1359ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// } 1360ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// } 1361ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1362ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// The body of the loop is not available yet, since it cannot be analysed until 1363ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// we have determined the type of the for-range-declaration. 1364ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult 1365ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithSema::ActOnCXXForRangeStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 1366ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Stmt *First, SourceLocation ColonLoc, Expr *Range, 1367ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RParenLoc) { 1368ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!First || !Range) 1369ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1370ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1371ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *DS = dyn_cast<DeclStmt>(First); 1372ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith assert(DS && "first part of for range not a decl stmt"); 1373ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1374ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!DS->isSingleDecl()) { 1375ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(DS->getStartLoc(), diag::err_type_defined_in_for_range); 1376ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1377ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1378ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DS->getSingleDecl()->isInvalidDecl()) 1379ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1380ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1381ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DiagnoseUnexpandedParameterPack(Range, UPPC_Expression)) 1382ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1383ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1384ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build auto && __range = range-init 1385ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RangeLoc = Range->getLocStart(); 1386ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *RangeVar = BuildForRangeVarDecl(*this, RangeLoc, 1387ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Context.getAutoRRefDeductType(), 1388ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__range"); 1389ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, RangeVar, Range, RangeLoc, 1390ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_deduction_failure)) 1391ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1392ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1393ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Claim the type doesn't contain auto: we've already done the checking. 1394ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclGroupPtrTy RangeGroup = 1395ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BuildDeclaratorGroup((Decl**)&RangeVar, 1, /*TypeMayContainAuto=*/false); 1396ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith StmtResult RangeDecl = ActOnDeclStmt(RangeGroup, RangeLoc, RangeLoc); 1397ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RangeDecl.isInvalid()) 1398ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1399ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1400ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return BuildCXXForRangeStmt(ForLoc, ColonLoc, RangeDecl.get(), 1401ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*BeginEndDecl=*/0, /*Cond=*/0, /*Inc=*/0, DS, 1402ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith RParenLoc); 1403ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1404ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1405ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// BuildCXXForRangeStmt - Build or instantiate a C++0x for-range statement. 1406ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult 1407ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithSema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc, 1408ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Stmt *RangeDecl, Stmt *BeginEnd, Expr *Cond, 1409ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Inc, Stmt *LoopVarDecl, 1410ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RParenLoc) { 1411ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Scope *S = getCurScope(); 1412ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1413ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *RangeDS = cast<DeclStmt>(RangeDecl); 1414ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *RangeVar = cast<VarDecl>(RangeDS->getSingleDecl()); 1415ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType RangeVarType = RangeVar->getType(); 1416ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1417ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *LoopVarDS = cast<DeclStmt>(LoopVarDecl); 1418ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *LoopVar = cast<VarDecl>(LoopVarDS->getSingleDecl()); 1419ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1420ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith StmtResult BeginEndDecl = BeginEnd; 1421ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult NotEqExpr = Cond, IncrExpr = Inc; 1422ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1423ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!BeginEndDecl.get() && !RangeVarType->isDependentType()) { 1424ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RangeLoc = RangeVar->getLocation(); 1425ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1426e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek const QualType RangeVarNonRefType = RangeVarType.getNonReferenceType(); 1427e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1428e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek ExprResult BeginRangeRef = BuildDeclRefExpr(RangeVar, RangeVarNonRefType, 1429e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1430e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRangeRef.isInvalid()) 1431e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1432e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1433e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek ExprResult EndRangeRef = BuildDeclRefExpr(RangeVar, RangeVarNonRefType, 1434e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1435e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (EndRangeRef.isInvalid()) 1436ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1437ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1438ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType AutoType = Context.getAutoDeductType(); 1439ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Range = RangeVar->getInit(); 1440ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Range) 1441ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1442ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType RangeType = Range->getType(); 1443ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1444ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RequireCompleteType(RangeLoc, RangeType, 1445ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith PDiag(diag::err_for_range_incomplete_type))) 1446ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1447ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1448ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build auto __begin = begin-expr, __end = end-expr. 1449ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *BeginVar = BuildForRangeVarDecl(*this, ColonLoc, AutoType, 1450ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__begin"); 1451ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *EndVar = BuildForRangeVarDecl(*this, ColonLoc, AutoType, 1452ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__end"); 1453ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1454ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build begin-expr and end-expr and attach to __begin and __end variables. 1455ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BeginExpr, EndExpr; 1456ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (const ArrayType *UnqAT = RangeType->getAsArrayTypeUnsafe()) { 1457ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - if _RangeT is an array type, begin-expr and end-expr are __range and 1458ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // __range + __bound, respectively, where __bound is the array bound. If 1459ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // _RangeT is an array of unknown size or an array of incomplete type, 1460ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // the program is ill-formed; 1461ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1462ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // begin-expr is __range. 1463e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginExpr = BeginRangeRef; 1464e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (FinishForRangeVarDecl(*this, BeginVar, BeginRangeRef.get(), ColonLoc, 1465ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1466ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1467ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1468ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1469ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1470ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Find the array bound. 1471ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BoundExpr; 1472ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(UnqAT)) 1473ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr = Owned(IntegerLiteral::Create(Context, CAT->getSize(), 14741dd986dff9ddfbec687975700770bb377988e9edRichard Trieu Context.getPointerDiffType(), 14751dd986dff9ddfbec687975700770bb377988e9edRichard Trieu RangeLoc)); 1476ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith else if (const VariableArrayType *VAT = 1477ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith dyn_cast<VariableArrayType>(UnqAT)) 1478ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr = VAT->getSizeExpr(); 1479ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith else { 1480ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Can't be a DependentSizedArrayType or an IncompleteArrayType since 1481ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // UnqAT is not incomplete and Range is not type-dependent. 1482b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Unexpected array type in for-range"); 1483ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1484ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1485ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // end-expr is __range + __bound. 1486e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek EndExpr = ActOnBinOp(S, ColonLoc, tok::plus, EndRangeRef.get(), 1487ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr.get()); 1488ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (EndExpr.isInvalid()) 1489ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1490ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, EndVar, EndExpr.get(), ColonLoc, 1491ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1492ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1493ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1494ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1495ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1496ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclarationNameInfo BeginNameInfo(&PP.getIdentifierTable().get("begin"), 1497ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc); 1498ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclarationNameInfo EndNameInfo(&PP.getIdentifierTable().get("end"), 1499ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc); 1500ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1501ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult BeginMemberLookup(*this, BeginNameInfo, LookupMemberName); 1502ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult EndMemberLookup(*this, EndNameInfo, LookupMemberName); 1503ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1504ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CXXRecordDecl *D = RangeType->getAsCXXRecordDecl()) { 1505ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - if _RangeT is a class type, the unqualified-ids begin and end are 1506ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // looked up in the scope of class _RangeT as if by class member access 1507ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // lookup (3.4.5), and if either (or both) finds at least one 1508ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // declaration, begin-expr and end-expr are __range.begin() and 1509ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // __range.end(), respectively; 1510ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupQualifiedName(BeginMemberLookup, D); 1511ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupQualifiedName(EndMemberLookup, D); 1512ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1513ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (BeginMemberLookup.empty() != EndMemberLookup.empty()) { 1514ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(ColonLoc, diag::err_for_range_member_begin_end_mismatch) 1515ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << RangeType << BeginMemberLookup.empty(); 1516ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1517ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1518ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1519ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - otherwise, begin-expr and end-expr are begin(__range) and 1520ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // end(__range), respectively, where begin and end are looked up with 1521ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // argument-dependent lookup (3.4.2). For the purposes of this name 1522ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // lookup, namespace std is an associated namespace. 1523ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1524ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1525ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, BeginVar, 1526ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_begin, BeginNameInfo, 1527e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginMemberLookup, 1528e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginRangeRef.get()); 1529ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (BeginExpr.isInvalid()) 1530ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1531ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1532ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith EndExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, EndVar, 1533ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_end, EndNameInfo, 1534e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek EndMemberLookup, EndRangeRef.get()); 1535ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (EndExpr.isInvalid()) 1536ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1537ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1538ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1539ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // C++0x [decl.spec.auto]p6: BeginType and EndType must be the same. 1540ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType BeginType = BeginVar->getType(), EndType = EndVar->getType(); 1541ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Context.hasSameType(BeginType, EndType)) { 1542ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(RangeLoc, diag::err_for_range_begin_end_types_differ) 1543ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << BeginType << EndType; 1544ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1545ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1546ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1547ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1548ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl *BeginEndDecls[] = { BeginVar, EndVar }; 1549ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Claim the type doesn't contain auto: we've already done the checking. 1550ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclGroupPtrTy BeginEndGroup = 1551ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BuildDeclaratorGroup(BeginEndDecls, 2, /*TypeMayContainAuto=*/false); 1552ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndDecl = ActOnDeclStmt(BeginEndGroup, ColonLoc, ColonLoc); 1553ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1554e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek const QualType BeginRefNonRefType = BeginType.getNonReferenceType(); 1555e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek ExprResult BeginRef = BuildDeclRefExpr(BeginVar, BeginRefNonRefType, 1556ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1557e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRef.isInvalid()) 1558e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1559e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1560ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult EndRef = BuildDeclRefExpr(EndVar, EndType.getNonReferenceType(), 1561ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1562e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (EndRef.isInvalid()) 1563e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1564ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1565ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check __begin != __end expression. 1566ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnBinOp(S, ColonLoc, tok::exclaimequal, 1567ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginRef.get(), EndRef.get()); 1568ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnBooleanCondition(S, ColonLoc, NotEqExpr.get()); 1569ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnFinishFullExpr(NotEqExpr.get()); 1570ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (NotEqExpr.isInvalid()) { 1571ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1572ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Context.hasSameType(BeginType, EndType)) 1573ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1574ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1575ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1576ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1577ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check ++__begin expression. 1578e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginRef = BuildDeclRefExpr(BeginVar, BeginRefNonRefType, 1579e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1580e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRef.isInvalid()) 1581e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1582e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1583ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IncrExpr = ActOnUnaryOp(S, ColonLoc, tok::plusplus, BeginRef.get()); 1584ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IncrExpr = ActOnFinishFullExpr(IncrExpr.get()); 1585ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (IncrExpr.isInvalid()) { 1586ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1587ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1588ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1589ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1590ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check *__begin expression. 1591e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginRef = BuildDeclRefExpr(BeginVar, BeginRefNonRefType, 1592e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1593e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRef.isInvalid()) 1594e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1595e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1596ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult DerefExpr = ActOnUnaryOp(S, ColonLoc, tok::star, BeginRef.get()); 1597ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DerefExpr.isInvalid()) { 1598ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1599ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1600ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1601ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1602ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Attach *__begin as initializer for VD. 1603ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!LoopVar->isInvalidDecl()) { 1604ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith AddInitializerToDecl(LoopVar, DerefExpr.get(), /*DirectInit=*/false, 1605ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TypeMayContainAuto=*/true); 1606ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (LoopVar->isInvalidDecl()) 1607ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1608ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1609cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith } else { 1610cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith // The range is implicitly used as a placeholder when it is dependent. 1611cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith RangeVar->setUsed(); 1612ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1613ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1614ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return Owned(new (Context) CXXForRangeStmt(RangeDS, 1615ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith cast_or_null<DeclStmt>(BeginEndDecl.get()), 1616ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr.take(), IncrExpr.take(), 1617ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LoopVarDS, /*Body=*/0, ForLoc, 1618ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc, RParenLoc)); 1619ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1620ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1621ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// FinishCXXForRangeStmt - Attach the body to a C++0x for-range statement. 1622ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// This is a separate step from ActOnCXXForRangeStmt because analysis of the 1623ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// body cannot be performed until after the type of the range variable is 1624ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// determined. 1625ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult Sema::FinishCXXForRangeStmt(Stmt *S, Stmt *B) { 1626ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!S || !B) 1627ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1628ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1629625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko CXXForRangeStmt *ForStmt = cast<CXXForRangeStmt>(S); 1630625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko ForStmt->setBody(B); 1631625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 1632625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko DiagnoseEmptyStmtBody(ForStmt->getRParenLoc(), B, 1633625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko diag::warn_empty_range_based_for_body); 1634625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 1635ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return S; 1636ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1637ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 163857ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerStmtResult Sema::ActOnGotoStmt(SourceLocation GotoLoc, 163957ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation LabelLoc, 164057ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner LabelDecl *TheDecl) { 164157ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner getCurFunction()->setHasBranchIntoScope(); 1642ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setUsed(); 1643ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(new (Context) GotoStmt(TheDecl, GotoLoc, LabelLoc)); 16445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 16455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 164660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1647ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 16489ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E) { 1649bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 16505f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 16515f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 16522877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth QualType DestTy = Context.getPointerType(Context.VoidTy.withConst()); 1653429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult ExprRes = Owned(E); 16545f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 1655429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CheckSingleAssignmentConstraints(DestTy, ExprRes); 1656429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (ExprRes.isInvalid()) 1657429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1658429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley E = ExprRes.take(); 16592877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth if (DiagnoseAssignmentResult(ConvTy, StarLoc, DestTy, ETy, E, AA_Passing)) 16605f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 1661d29975fd08713eb9d1777e60536addaa62df8995Eli Friedman E = MaybeCreateExprWithCleanups(E); 16625f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 1663b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 1664781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasIndirectGoto(); 1665b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 16665f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 16675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 16685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 166960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 16701b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 16715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 16725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 16735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 16744cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 16755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 16764cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 16778189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 16785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 16795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 168060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 16811b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 16825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 16835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 16845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 16854cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 16865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 16874cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 16888189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 16895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 16905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1691dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \brief Determine whether the given expression is a candidate for 1692f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// copy elision in either a return statement or a throw expression. 16935077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1694f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param ReturnType If we're determining the copy elision candidate for 1695f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// a return statement, this is the return type of the function. If we're 1696f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// determining the copy elision candidate for a throw expression, this will 1697f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// be a NULL type. 16985077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1699f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param E The expression being returned from the function or block, or 1700f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// being thrown. 17015077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 17024926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// \param AllowFunctionParameter Whether we allow function parameters to 17034926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// be considered NRVO candidates. C++ prohibits this for NRVO itself, but 17044926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// we re-use this logic to determine whether we should try to move as part of 17054926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// a return or throw (which does allow function parameters). 17065077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 17075077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \returns The NRVO candidate variable, if the return statement may use the 17085077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// NRVO, or NULL if there is no such candidate. 1709f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregorconst VarDecl *Sema::getCopyElisionCandidate(QualType ReturnType, 1710f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor Expr *E, 1711f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor bool AllowFunctionParameter) { 1712f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor QualType ExprType = E->getType(); 17133c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // - in a return statement in a function with ... 17143c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // ... a class return type ... 1715f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType.isNull()) { 1716f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType->isRecordType()) 1717f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1718f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // ... the same cv-unqualified type as the function return type ... 1719f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!Context.hasSameUnqualifiedType(ReturnType, ExprType)) 1720f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1721f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor } 1722dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1723dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // ... the expression is the name of a non-volatile automatic object 1724f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // (other than a function or catch-clause parameter)) ... 1725f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(E->IgnoreParens()); 17263c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!DR) 17275077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 17283c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 17293c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!VD) 17305077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 1731dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17321cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // ...object (other than a function or catch-clause parameter)... 17331cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->getKind() != Decl::Var && 17341cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall !(AllowFunctionParameter && VD->getKind() == Decl::ParmVar)) 17351cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall return 0; 17361cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->isExceptionVariable()) return 0; 17371cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall 17381cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // ...automatic... 17391cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (!VD->hasLocalStorage()) return 0; 17401cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall 17411cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // ...non-volatile... 17421cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->getType().isVolatileQualified()) return 0; 17431cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->getType()->isReferenceType()) return 0; 17441cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall 17451cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // __block variables can't be allocated in a way that permits NRVO. 17461cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->hasAttr<BlocksAttr>()) return 0; 17471cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall 17481cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // Variables with higher required alignment than their type's ABI 17491cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall // alignment cannot use NRVO. 17501cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall if (VD->hasAttr<AlignedAttr>() && 17511cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall Context.getDeclAlign(VD) > Context.getTypeAlignInChars(VD->getType())) 17521cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall return 0; 1753dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17541cd76e8ca8f890a4defadcae3372c025ebe7607cJohn McCall return VD; 17553c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor} 17563c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor 175707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// \brief Perform the initialization of a potentially-movable value, which 175807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// is the result of return value. 1759cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// 1760cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// This routine implements C++0x [class.copy]p33, which attempts to treat 1761cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// returned lvalues as rvalues in certain cases (to prefer move construction), 1762cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// then falls back to treating them as lvalues if that failed. 1763dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiExprResult 176407f402cff25354c5f06f307f19b0c57c09d964bdDouglas GregorSema::PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 176507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor const VarDecl *NRVOCandidate, 176607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor QualType ResultType, 1767bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor Expr *Value, 1768bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor bool AllowNRVO) { 1769cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // C++0x [class.copy]p33: 1770dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // When the criteria for elision of a copy operation are met or would 1771dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // be met save for the fact that the source object is a function 1772dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // parameter, and the object to be copied is designated by an lvalue, 1773cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // overload resolution to select the constructor for the copy is first 1774cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // performed as if the object were designated by an rvalue. 1775cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor ExprResult Res = ExprError(); 1776bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor if (AllowNRVO && 1777bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor (NRVOCandidate || getCopyElisionCandidate(ResultType, Value, true))) { 1778dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ImplicitCastExpr AsRvalue(ImplicitCastExpr::OnStack, 177907f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getType(), CK_LValueToRValue, 178007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value, VK_XValue); 1781dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1782cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Expr *InitExpr = &AsRvalue; 1783dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializationKind Kind 178407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = InitializationKind::CreateCopy(Value->getLocStart(), 178507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getLocStart()); 178607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor InitializationSequence Seq(*this, Entity, Kind, &InitExpr, 1); 1787dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1788dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // [...] If overload resolution fails, or if the type of the first 1789cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // parameter of the selected constructor is not an rvalue reference 17900099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // to the object's type (possibly cv-qualified), overload resolution 1791cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // is performed again, considering the object as an lvalue. 1792383616cd2e61131a534afd9364ef53f643e1f834Sebastian Redl if (Seq) { 1793cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor for (InitializationSequence::step_iterator Step = Seq.step_begin(), 1794cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor StepEnd = Seq.step_end(); 1795cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Step != StepEnd; ++Step) { 1796383616cd2e61131a534afd9364ef53f643e1f834Sebastian Redl if (Step->Kind != InitializationSequence::SK_ConstructorInitialization) 1797cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor continue; 1798dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1799dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CXXConstructorDecl *Constructor 1800cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor = cast<CXXConstructorDecl>(Step->Function.Function); 1801dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1802cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor const RValueReferenceType *RRefType 180307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = Constructor->getParamDecl(0)->getType() 180407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor ->getAs<RValueReferenceType>(); 1805dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1806cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // If we don't meet the criteria, break out now. 1807dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!RRefType || 180807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor !Context.hasSameUnqualifiedType(RRefType->getPointeeType(), 180907f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Context.getTypeDeclType(Constructor->getParent()))) 1810cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor break; 1811dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1812cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Promote "AsRvalue" to the heap, since we now need this 1813cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // expression node to persist. 181407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value = ImplicitCastExpr::Create(Context, Value->getType(), 1815dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CK_LValueToRValue, Value, 0, 181607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor VK_XValue); 1817dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1818cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Complete type-checking the initialization of the return type 1819cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // using the constructor we found. 182007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = Seq.Perform(*this, Entity, Kind, MultiExprArg(&Value, 1)); 1821cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1822cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1823cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1824dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1825cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Either we didn't meet the criteria for treating an lvalue as an rvalue, 1826dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // above, or overload resolution failed. Either way, we need to try 1827cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // (again) now with the return value expression as written. 1828cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor if (Res.isInvalid()) 182907f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = PerformCopyInitialization(Entity, SourceLocation(), Value); 1830dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1831cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor return Res; 1832cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor} 1833cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor 183484b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman/// ActOnCapScopeReturnStmt - Utility routine to type-check return statements 183584b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman/// for capturing scopes. 18364eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 183760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 183884b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli FriedmanSema::ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 183984b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman // If this is the first return we've seen, infer the return type. 184084b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman // [expr.prim.lambda]p4 in C++11; block literals follow a superset of those 184184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman // rules which allows multiple return statements. 184284b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman CapturingScopeInfo *CurCap = cast<CapturingScopeInfo>(getCurFunction()); 184384b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman if (CurCap->HasImplicitReturnType) { 184484b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman QualType ReturnT; 1845a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor if (RetValExp && !isa<InitListExpr>(RetValExp)) { 1846429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(RetValExp); 1847429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1848429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1849429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley RetValExp = Result.take(); 18506a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor 185184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman if (!RetValExp->isTypeDependent()) 185284b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman ReturnT = RetValExp->getType(); 185384b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman else 185484b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman ReturnT = Context.DependentTy; 1855a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor } else { 1856a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor if (RetValExp) { 1857a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor // C++11 [expr.lambda.prim]p4 bans inferring the result from an 1858a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor // initializer list, because it is not an expression (even 1859a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor // though we represent it as one). We still deduce 'void'. 1860a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor Diag(ReturnLoc, diag::err_lambda_return_init_list) 1861a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor << RetValExp->getSourceRange(); 1862a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor } 1863a0c2b21e0d84ad289781e08e14148da6b8b8b76dDouglas Gregor 186484b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman ReturnT = Context.VoidTy; 186584b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman } 186684b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman // We require the return types to strictly match here. 186784b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman if (!CurCap->ReturnType.isNull() && 186884b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman !CurCap->ReturnType->isDependentType() && 186984b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman !ReturnT->isDependentType() && 187084b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman !Context.hasSameType(ReturnT, CurCap->ReturnType)) { 187184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman Diag(ReturnLoc, diag::err_typecheck_missing_return_type_incompatible) 18724e88df72e690498aeba2dc3d5089388b27be66faDouglas Gregor << ReturnT << CurCap->ReturnType 18730bcc3d87223d7796946bfa6dd6174af900d8eba4Douglas Gregor << (getCurLambda() != 0); 187484b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman return StmtError(); 1875649657e7d6c150136cae5ab22e39b9794cff80ccFariborz Jahanian } 187684b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman CurCap->ReturnType = ReturnT; 18774eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 187884b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman QualType FnRetType = CurCap->ReturnType; 187984b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman assert(!FnRetType.isNull()); 18804cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1881793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor if (BlockScopeInfo *CurBlock = dyn_cast<BlockScopeInfo>(CurCap)) { 188284b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman if (CurBlock->FunctionType->getAs<FunctionType>()->getNoReturnAttr()) { 188384b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr); 188484b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman return StmtError(); 188584b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman } 1886793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor } else { 1887793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor LambdaScopeInfo *LSI = cast<LambdaScopeInfo>(CurCap); 1888793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor if (LSI->CallOperator->getType()->getAs<FunctionType>()->getNoReturnAttr()){ 1889793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor Diag(ReturnLoc, diag::err_noreturn_lambda_has_return_expr); 1890793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor return StmtError(); 1891793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor } 1892793cd1c4cdfaafc52e2c2ad9dae959befe4bb166Douglas Gregor } 18936c92fa75e62937f9738696840efcb258560f4568Mike Stump 18944eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 18954eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 18964eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 1897d963c37eb912342c8325048749e449861cf0a6e3John McCall const VarDecl *NRVOCandidate = 0; 18980a7efe1142d241678c91bf93ee6adb51289863a4John McCall if (FnRetType->isDependentType()) { 18990a7efe1142d241678c91bf93ee6adb51289863a4John McCall // Delay processing for now. TODO: there are lots of dependent 19000a7efe1142d241678c91bf93ee6adb51289863a4John McCall // types we can conclusively prove aren't void. 19010a7efe1142d241678c91bf93ee6adb51289863a4John McCall } else if (FnRetType->isVoidType()) { 19025b38a0f98e4420dae1bd3e13959bc207c97a9e98Sebastian Redl if (RetValExp && !isa<InitListExpr>(RetValExp) && 19034e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie !(getLangOpts().CPlusPlus && 19040a7efe1142d241678c91bf93ee6adb51289863a4John McCall (RetValExp->isTypeDependent() || 19050a7efe1142d241678c91bf93ee6adb51289863a4John McCall RetValExp->getType()->isVoidType()))) { 19064e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian if (!getLangOpts().CPlusPlus && 19074e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian RetValExp->getType()->isVoidType()) 19089354f6aaa70e1543d122644fee0c3f834324d2fcFariborz Jahanian Diag(ReturnLoc, diag::ext_return_has_void_expr) << "literal" << 2; 19094e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian else { 19104e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian Diag(ReturnLoc, diag::err_return_block_has_expr); 19114e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian RetValExp = 0; 19124e648e4770d85febaf15ad8b7bad458bd7338ae2Fariborz Jahanian } 19134eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 19145077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp) { 19150a7efe1142d241678c91bf93ee6adb51289863a4John McCall return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 19160a7efe1142d241678c91bf93ee6adb51289863a4John McCall } else if (!RetValExp->isTypeDependent()) { 19170a7efe1142d241678c91bf93ee6adb51289863a4John McCall // we have a non-void block with an expression, continue checking 19180a7efe1142d241678c91bf93ee6adb51289863a4John McCall 19190a7efe1142d241678c91bf93ee6adb51289863a4John McCall // C99 6.8.6.4p3(136): The return statement is not an assignment. The 19200a7efe1142d241678c91bf93ee6adb51289863a4John McCall // overlap restriction of subclause 6.5.16.1 does not apply to the case of 19210a7efe1142d241678c91bf93ee6adb51289863a4John McCall // function return. 19220a7efe1142d241678c91bf93ee6adb51289863a4John McCall 19230a7efe1142d241678c91bf93ee6adb51289863a4John McCall // In C++ the return statement is handled via a copy initialization. 19240a7efe1142d241678c91bf93ee6adb51289863a4John McCall // the C version of which boils down to CheckSingleAssignmentConstraints. 19250a7efe1142d241678c91bf93ee6adb51289863a4John McCall NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 19260a7efe1142d241678c91bf93ee6adb51289863a4John McCall InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 19270a7efe1142d241678c91bf93ee6adb51289863a4John McCall FnRetType, 19280586520acb2f368c874943353a222be7f00c3068Fariborz Jahanian NRVOCandidate != 0); 19290a7efe1142d241678c91bf93ee6adb51289863a4John McCall ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 19300a7efe1142d241678c91bf93ee6adb51289863a4John McCall FnRetType, RetValExp); 19310a7efe1142d241678c91bf93ee6adb51289863a4John McCall if (Res.isInvalid()) { 19320a7efe1142d241678c91bf93ee6adb51289863a4John McCall // FIXME: Cleanup temporaries here, anyway? 19330a7efe1142d241678c91bf93ee6adb51289863a4John McCall return StmtError(); 1934c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson } 19350a7efe1142d241678c91bf93ee6adb51289863a4John McCall RetValExp = Res.take(); 19360a7efe1142d241678c91bf93ee6adb51289863a4John McCall CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 1937d963c37eb912342c8325048749e449861cf0a6e3John McCall } 1938dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1939d963c37eb912342c8325048749e449861cf0a6e3John McCall if (RetValExp) { 1940d963c37eb912342c8325048749e449861cf0a6e3John McCall CheckImplicitConversions(RetValExp, ReturnLoc); 1941d963c37eb912342c8325048749e449861cf0a6e3John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 194298eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 19430a7efe1142d241678c91bf93ee6adb51289863a4John McCall ReturnStmt *Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 19440a7efe1142d241678c91bf93ee6adb51289863a4John McCall NRVOCandidate); 19454cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1946dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 19475077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 19484e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().CPlusPlus && FnRetType->isRecordType() && 19495077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 19505077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1951dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 19525077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 19534eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 19545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 195560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 19569ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 1957fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor // Check for unexpanded parameter packs. 1958fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor if (RetValExp && DiagnoseUnexpandedParameterPack(RetValExp)) 1959fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor return StmtError(); 1960fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor 196184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman if (isa<CapturingScopeInfo>(getCurFunction())) 196284b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman return ActOnCapScopeReturnStmt(ReturnLoc, RetValExp); 19634cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1964371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 196538ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman QualType RelatedRetType; 1966f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 1967371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 196804a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall if (FD->hasAttr<NoReturnAttr>() || 196904a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall FD->getType()->getAs<FunctionType>()->getNoReturnAttr()) 19708662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 197179430e9983f5e67a378fc1f50cd6278f2cea8259Eli Friedman << FD->getDeclName(); 1972926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else if (ObjCMethodDecl *MD = getCurMethodDecl()) { 197338ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman FnRetType = MD->getResultType(); 1974926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor if (MD->hasRelatedResultType() && MD->getClassInterface()) { 1975926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // In the implementation of a method with a related return type, the 1976926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // type used to type-check the validity of return statements within the 1977926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // method body is a pointer to the type of the class being implemented. 197838ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman RelatedRetType = Context.getObjCInterfaceType(MD->getClassInterface()); 197938ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman RelatedRetType = Context.getObjCObjectPointerType(RelatedRetType); 1980926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } 1981926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else // If we don't have a function/method context, bail. 1982c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 19831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19845077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 19855cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 19868d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (RetValExp) { 198733deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl if (isa<InitListExpr>(RetValExp)) { 198833deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl // We simply never allow init lists as the return value of void 198933deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl // functions. This is compatible because this was never allowed before, 199033deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl // so there's no legacy code to deal with. 199133deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 199233deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl int FunctionKind = 0; 199333deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl if (isa<ObjCMethodDecl>(CurDecl)) 199433deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl FunctionKind = 1; 199533deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl else if (isa<CXXConstructorDecl>(CurDecl)) 199633deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl FunctionKind = 2; 199733deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl else if (isa<CXXDestructorDecl>(CurDecl)) 199833deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl FunctionKind = 3; 199933deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl 200033deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl Diag(ReturnLoc, diag::err_return_init_list) 200133deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl << CurDecl->getDeclName() << FunctionKind 200233deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl << RetValExp->getSourceRange(); 200333deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl 200433deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl // Drop the expression. 200533deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl RetValExp = 0; 200633deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl } else if (!RetValExp->isTypeDependent()) { 20078d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky // C99 6.8.6.4p1 (ext_ since GCC warns) 20088d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky unsigned D = diag::ext_return_has_expr; 20098d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (RetValExp->getType()->isVoidType()) 20108d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky D = diag::ext_return_has_void_expr; 20118d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky else { 20128d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky ExprResult Result = Owned(RetValExp); 20138d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Result = IgnoredValueConversions(Result.take()); 20148d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (Result.isInvalid()) 20158d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky return StmtError(); 20168d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky RetValExp = Result.take(); 20178d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky RetValExp = ImpCastExprToType(RetValExp, 20188d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Context.VoidTy, CK_ToVoid).take(); 20198d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky } 20204cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 20218d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky // return (some void expression); is legal in C++. 20228d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (D != diag::ext_return_has_void_expr || 20234e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie !getLangOpts().CPlusPlus) { 20248d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 2025ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth 2026ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth int FunctionKind = 0; 2027ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth if (isa<ObjCMethodDecl>(CurDecl)) 2028ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 1; 2029ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth else if (isa<CXXConstructorDecl>(CurDecl)) 2030ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 2; 2031ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth else if (isa<CXXDestructorDecl>(CurDecl)) 2032ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 3; 2033ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth 20348d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Diag(ReturnLoc, D) 2035ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth << CurDecl->getDeclName() << FunctionKind 20368d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky << RetValExp->getSourceRange(); 20378d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky } 2038e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 20391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 204033deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl if (RetValExp) { 204133deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl CheckImplicitConversions(RetValExp, ReturnLoc); 204233deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl RetValExp = MaybeCreateExprWithCleanups(RetValExp); 204333deb35535aebe81bed0eaf5c14f3032276a086eSebastian Redl } 20445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2045dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 20465077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 20475077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp && !FnRetType->isDependentType()) { 20483c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 20493c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 20504e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().C99) DiagID = diag::ext_return_missing_expr; 20513c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 20523c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 205308631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 20543c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 205508631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 20565077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc); 20575077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 20585077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 20595077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 20605077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void function with an expression, continue checking 20615077c3876beeaed32280af88244e8050078619a8Douglas Gregor 206238ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman if (!RelatedRetType.isNull()) { 206338ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman // If we have a related result type, perform an extra conversion here. 206438ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman // FIXME: The diagnostics here don't really describe what is happening. 206538ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman InitializedEntity Entity = 206638ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman InitializedEntity::InitializeTemporary(RelatedRetType); 206738ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman 206838ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman ExprResult Res = PerformCopyInitialization(Entity, SourceLocation(), 206938ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman RetValExp); 207038ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman if (Res.isInvalid()) { 207138ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman // FIXME: Cleanup temporaries here, anyway? 207238ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman return StmtError(); 207338ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman } 207438ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman RetValExp = Res.takeAs<Expr>(); 207538ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman } 207638ac243e300798e8cd9fe05888cd97beabfb94e6Eli Friedman 20775077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 20785077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 20795077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 20805077c3876beeaed32280af88244e8050078619a8Douglas Gregor 2081856d3798af7c2f7251e4a295f3da7a09ce4c62abJohn McCall // In C++ the return statement is handled via a copy initialization, 20825077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 2083f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 2084dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 208507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 208658f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet NRVOCandidate != 0); 2087dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 208807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 20895077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 20905077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 20915077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 20925077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 20934cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 20945077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 2095dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 20965077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 209766724ea67d7d598b937d86fa66f03f09a1c758f3Douglas Gregor } 2098dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2099b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 2100b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 21014765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 2102b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 21035077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 2104898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 2105dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2106dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 21075077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 21084e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getLangOpts().CPlusPlus && FnRetType->isRecordType() && 21095077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 21105077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 2111f85e193739c953358c865005855253af4f68a497John McCall 21125077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 21135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 21145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2115810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 2116810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 2117810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 2118810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 2119810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 2120810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 2121810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 2122810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 2123703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson // Type dependent expressions will be checked during instantiation. 2124703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson if (E->isTypeDependent()) 2125703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson return false; 2126dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 21277eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E->isLValue()) 2128810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 2129810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 2130810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 2131810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 2132810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 21337eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E != E2 && E2->isLValue()) { 21344e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!S.getLangOpts().HeinousExtensions) 2135810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 2136810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 2137810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 2138810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 2139810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 2140810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 2141810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 2142810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 2143810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 2144810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 2145810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 2146810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 2147810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 2148ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// isOperandMentioned - Return true if the specified operand # is mentioned 2149ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// anywhere in the decomposed asm string. 2150ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattnerstatic bool isOperandMentioned(unsigned OpNo, 21512d3ba4f5a923a90c3fc290ddfba5e36c2d0a9b46Chris Lattner ArrayRef<AsmStmt::AsmStringPiece> AsmStrPieces) { 2152ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner for (unsigned p = 0, e = AsmStrPieces.size(); p != e; ++p) { 2153ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner const AsmStmt::AsmStringPiece &Piece = AsmStrPieces[p]; 2154ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (!Piece.isOperand()) continue; 2155ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 2156ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 2157ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 2158ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (Piece.getOperandNo() == OpNo) 2159ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return true; 2160ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 2161ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 2162ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return false; 2163ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner} 2164810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 2165ca57b4b7658a031b74cda5ac504311998be8e343Chris LattnerStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, bool IsSimple, 2166ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner bool IsVolatile, unsigned NumOutputs, 2167ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner unsigned NumInputs, IdentifierInfo **Names, 2168ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner MultiExprArg constraints, MultiExprArg exprs, 2169ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner Expr *asmString, MultiExprArg clobbers, 2170ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner SourceLocation RParenLoc, bool MSAsm) { 21713037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 21723037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 21733037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 21749ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr **Exprs = exprs.get(); 21759ae2f076ca5ab1feb3ba95629099ec2319833701John McCall StringLiteral *AsmString = cast<StringLiteral>(asmString); 21763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 21773037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 21785f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 21791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21801708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 21815cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!AsmString->isAscii()) 21823037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 21833037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 21843037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 21851708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 21861708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 21875cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 21883037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 21893037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 21903037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 21915f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef OutputName; 2192ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 2193ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson OutputName = Names[i]->getName(); 2194ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 2195ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 2196bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (!Context.getTargetInfo().validateOutputConstraint(Info)) 21973037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 2198432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 2199432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 22003037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2201d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 220272056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 2203810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 220472056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 2205dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 220672056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 220704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 22081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 220944def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 221004728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 22113037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 22125f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 2213806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 221404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 22151708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 22165cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 22173037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 22183037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 22193037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 22205f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef InputName; 2221ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 2222ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson InputName = Names[i]->getName(); 2223ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 2224ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 2225bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (!Context.getTargetInfo().validateInputConstraint(OutputConstraintInfos.data(), 22262819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 22273037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 2228432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 2229432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 2230d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 22313037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 223272056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 22333037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2234d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 223544def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 2236810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 223772056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 2238d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 2239432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 224072056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 224104728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 22423037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 224344def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 2244d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 224572056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 2246d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 22471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump << InputExpr->getType() << Info.getConstraintStr() 224872056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 2249d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 2250d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 22511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2252429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(Exprs[i]); 2253429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2254429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 22551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2256429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Exprs[i] = Result.take(); 2257806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 225804728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 22593037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 22606fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 22611708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 22621708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 22635cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 22643037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 22653037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 22663037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 22675f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Clobber = Literal->getString(); 22683037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2269bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (!Context.getTargetInfo().isValidClobber(Clobber)) 22703037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 22717765934ad7e157b5fcf925792a38e01b1edbcf8aDaniel Dunbar diag::err_asm_unknown_register_name) << Clobber); 22726fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 22733037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2274fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 2275dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm, 2276dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NumOutputs, NumInputs, Names, Constraints, Exprs, 2277966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson AsmString, NumClobbers, Clobbers, RParenLoc); 2278fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 2279fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 22805f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 2281fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 2282fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 22832ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 22842ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 2285fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 2286fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 22871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2288806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 2289806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 2290806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 22911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2292806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 2293806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 2294806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 2295806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 22961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2297806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 2298935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner unsigned InputOpNo = i+NumOutputs; 2299f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 2300935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Expr *InputExpr = Exprs[InputOpNo]; 2301f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman 2302f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman if (OutputExpr->isTypeDependent() || InputExpr->isTypeDependent()) 2303f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman continue; 2304f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman 23057adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 23067adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 23077adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 2308806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 23091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2310aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // Decide if the input and output are in the same domain (integer/ptr or 2311aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // floating point. 2312aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner enum AsmDomain { 2313aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner AD_Int, AD_FP, AD_Other 2314aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner } InputDomain, OutputDomain; 2315dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2316aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (InTy->isIntegerType() || InTy->isPointerType()) 2317aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Int; 23180c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (InTy->isRealFloatingType()) 2319aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_FP; 2320aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 2321aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Other; 23223351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 2323aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutTy->isIntegerType() || OutTy->isPointerType()) 2324aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Int; 23250c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (OutTy->isRealFloatingType()) 2326aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_FP; 2327aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 2328aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Other; 2329dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2330aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // They are ok if they are the same size and in the same domain. This 2331aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // allows tying things like: 2332aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int* 2333aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int if they are the same size. 2334aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // double to long double if they are the same size. 2335dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // 2336aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 2337aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 2338aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutSize == InSize && InputDomain == OutputDomain && 2339aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain != AD_Other) 2340aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 2341dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2342aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 2343f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // then we can promote the smaller one to a larger input and the asm string 2344f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // won't notice. 2345aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner bool SmallerValueMentioned = false; 2346ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 2347ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 2348ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 2349935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (isOperandMentioned(InputOpNo, Pieces)) { 2350ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // This is a use in the asm string of the smaller operand. Since we 2351ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // codegen this by promoting to a wider value, the asm will get printed 2352ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // "wrong". 2353f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= InSize < OutSize; 2354ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 2355f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner if (isOperandMentioned(TiedTo, Pieces)) { 2356ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the output, and if the output is the larger 2357ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // value, then it's ok because we'll promote the input to the larger type. 2358f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= OutSize < InSize; 2359806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 23601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2361aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 2362aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // output was a register, just extend the shorter one to the size of the 2363aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // larger one. 2364aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (!SmallerValueMentioned && InputDomain != AD_Other && 2365aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 2366aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 2367f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner 2368935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // Either both of the operands were mentioned or the smaller one was 2369935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // mentioned. One more special case that we'll allow: if the tied input is 2370935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // integer, unmentioned, and is a constant, then we'll allow truncating it 2371935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // down to the size of the destination. 2372935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (InputDomain == AD_Int && OutputDomain == AD_Int && 2373935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner !isOperandMentioned(InputOpNo, Pieces) && 2374935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner InputExpr->isEvaluatable(Context)) { 23754da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall CastKind castKind = 23764da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall (OutTy->isBooleanType() ? CK_IntegralToBoolean : CK_IntegralCast); 23774da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall InputExpr = ImpCastExprToType(InputExpr, OutTy, castKind).take(); 2378935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Exprs[InputOpNo] = InputExpr; 2379935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner NS->setInputExpr(i, InputExpr); 2380935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner continue; 2381935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner } 2382935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner 2383c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 2384806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 23857adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 2386806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 2387806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 2388806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 23891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2390fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 2391fe795956194141c91ae555985c9b930595bff43fChris Lattner} 23923b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 239360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2394431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 2395d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall SourceLocation RParen, Decl *Parm, 23969ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *Body) { 2397d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall VarDecl *Var = cast_or_null<VarDecl>(Parm); 2398160b5630aa781ac348303e1ae088d27016637778Douglas Gregor if (Var && Var->isInvalidDecl()) 2399160b5630aa781ac348303e1ae088d27016637778Douglas Gregor return StmtError(); 2400dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 24019ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtCatchStmt(AtLoc, RParen, Var, Body)); 24023b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 24033b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 240460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 24059ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body) { 24069ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, Body)); 2407161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 2408bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 240960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2410dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 24119ae2f076ca5ab1feb3ba95629099ec2319833701John McCall MultiStmtArg CatchStmts, Stmt *Finally) { 24124e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().ObjCExceptions) 2413da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@try"; 2414da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 2415781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 24168f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor unsigned NumCatchStmts = CatchStmts.size(); 24179ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(ObjCAtTryStmt::Create(Context, AtLoc, Try, 24189ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CatchStmts.release(), 24198f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor NumCatchStmts, 24209ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Finally)); 2421bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 2422bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 242360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::BuildObjCAtThrowStmt(SourceLocation AtLoc, 24249ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Throw) { 2425d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (Throw) { 2426f2dd68fb37a62571a4985c8dd05310ac90d07ef0Fariborz Jahanian Throw = MaybeCreateExprWithCleanups(Throw); 2427429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultLvalueConversion(Throw); 2428429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2429429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 24305e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 2431429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Throw = Result.take(); 2432d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor QualType ThrowType = Throw->getType(); 2433d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor // Make sure the expression type is an ObjC pointer or "void *". 2434d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!ThrowType->isDependentType() && 2435d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor !ThrowType->isObjCObjectPointerType()) { 2436d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor const PointerType *PT = ThrowType->getAs<PointerType>(); 2437d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!PT || !PT->getPointeeType()->isVoidType()) 2438d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 2439d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor << Throw->getType() << Throw->getSourceRange()); 2440d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 2441d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 2442dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 24439ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtThrowStmt(AtLoc, Throw)); 2444d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor} 2445d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor 244660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2447dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2448d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor Scope *CurScope) { 24494e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().ObjCExceptions) 2450da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@throw"; 2451da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 24529ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Throw) { 2453e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 2454e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 2455e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 2456e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 2457e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 2458e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 24594ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 2460dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 2461f2dd68fb37a62571a4985c8dd05310ac90d07ef0Fariborz Jahanian 24629ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return BuildObjCAtThrowStmt(AtLoc, Throw); 246339f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 2464bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 246507524039dce5c820f111a1b3f772b4261f004b4aJohn McCallExprResult 246607524039dce5c820f111a1b3f772b4261f004b4aJohn McCallSema::ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, Expr *operand) { 246707524039dce5c820f111a1b3f772b4261f004b4aJohn McCall ExprResult result = DefaultLvalueConversion(operand); 246807524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (result.isInvalid()) 246907524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return ExprError(); 247007524039dce5c820f111a1b3f772b4261f004b4aJohn McCall operand = result.take(); 24715e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 2472a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 247307524039dce5c820f111a1b3f772b4261f004b4aJohn McCall QualType type = operand->getType(); 247407524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (!type->isDependentType() && 247507524039dce5c820f111a1b3f772b4261f004b4aJohn McCall !type->isObjCObjectPointerType()) { 247607524039dce5c820f111a1b3f772b4261f004b4aJohn McCall const PointerType *pointerType = type->getAs<PointerType>(); 247707524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (!pointerType || !pointerType->getPointeeType()->isVoidType()) 247807524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return Diag(atLoc, diag::error_objc_synchronized_expects_object) 247907524039dce5c820f111a1b3f772b4261f004b4aJohn McCall << type << operand->getSourceRange(); 2480a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 24811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 248207524039dce5c820f111a1b3f772b4261f004b4aJohn McCall // The operand to @synchronized is a full-expression. 248307524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return MaybeCreateExprWithCleanups(operand); 248407524039dce5c820f111a1b3f772b4261f004b4aJohn McCall} 248507524039dce5c820f111a1b3f772b4261f004b4aJohn McCall 248607524039dce5c820f111a1b3f772b4261f004b4aJohn McCallStmtResult 248707524039dce5c820f111a1b3f772b4261f004b4aJohn McCallSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, Expr *SyncExpr, 248807524039dce5c820f111a1b3f772b4261f004b4aJohn McCall Stmt *SyncBody) { 248907524039dce5c820f111a1b3f772b4261f004b4aJohn McCall // We can't jump into or indirect-jump out of a @synchronized block. 249007524039dce5c820f111a1b3f772b4261f004b4aJohn McCall getCurFunction()->setHasBranchProtectedScope(); 24919ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, SyncExpr, SyncBody)); 2492fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 24934b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 24944b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 24954b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 249660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2497d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, Decl *ExDecl, 24989ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *HandlerBlock) { 24994b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 25008189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 2501d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall cast_or_null<VarDecl>(ExDecl), 25029ae2f076ca5ab1feb3ba95629099ec2319833701John McCall HandlerBlock)); 25034b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 25048351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 2505f85e193739c953358c865005855253af4f68a497John McCallStmtResult 2506f85e193739c953358c865005855253af4f68a497John McCallSema::ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body) { 2507f85e193739c953358c865005855253af4f68a497John McCall getCurFunction()->setHasBranchProtectedScope(); 2508f85e193739c953358c865005855253af4f68a497John McCall return Owned(new (Context) ObjCAutoreleasePoolStmt(AtLoc, Body)); 2509f85e193739c953358c865005855253af4f68a497John McCall} 2510f85e193739c953358c865005855253af4f68a497John McCall 25113c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 25123c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 2513c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlclass TypeWithHandler { 2514c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType t; 2515c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *stmt; 2516c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlpublic: 2517c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler(const QualType &type, CXXCatchStmt *statement) 2518c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl : t(type), stmt(statement) {} 2519c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 25200953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // An arbitrary order is fine as long as it places identical 25210953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // types next to each other. 2522c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator<(const TypeWithHandler &y) const { 25230953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() < y.t.getAsOpaquePtr()) 2524c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return true; 25250953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() > y.t.getAsOpaquePtr()) 2526c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return false; 2527c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl else 2528c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return getTypeSpecStartLoc() < y.getTypeSpecStartLoc(); 2529c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 25301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2531c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator==(const TypeWithHandler& other) const { 25320953e767ff7817f97b3ab20896b229891eeff45bJohn McCall return t == other.t; 2533c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 25341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2535c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *getCatchStmt() const { return stmt; } 2536c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl SourceLocation getTypeSpecStartLoc() const { 2537c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return stmt->getExceptionDecl()->getTypeSpecStartLoc(); 2538c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 2539c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl}; 2540c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 25413c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 25423c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 25438351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 25448351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 254560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 25469ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 25478351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 2548729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson // Don't report an error if 'try' is used in system headers. 25494e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!getLangOpts().CXXExceptions && 2550729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson !getSourceManager().isInSystemHeader(TryLoc)) 2551729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson Diag(TryLoc, diag::err_exceptions_disabled) << "try"; 25527f11d9cf5df1f8ce82af46eabc4ec5cec7d580b0Anders Carlsson 25538351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 25548351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 25558351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 25569ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt **Handlers = RawHandlers.get(); 25578351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 25585f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TypeWithHandler, 8> TypesWithHandlers; 25591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (unsigned i = 0; i < NumHandlers; ++i) { 25615f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner CXXCatchStmt *Handler = cast<CXXCatchStmt>(Handlers[i]); 2562c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (!Handler->getExceptionDecl()) { 2563c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (i < NumHandlers - 1) 2564c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return StmtError(Diag(Handler->getLocStart(), 2565c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::err_early_catch_all)); 25661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2567c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl continue; 2568c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 25691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2570c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CaughtType = Handler->getCaughtType(); 2571c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CanonicalCaughtType = Context.getCanonicalType(CaughtType); 2572c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypesWithHandlers.push_back(TypeWithHandler(CanonicalCaughtType, Handler)); 2573c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 2574c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 2575c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl // Detect handlers for the same type as an earlier one. 2576c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (NumHandlers > 1) { 2577c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::array_pod_sort(TypesWithHandlers.begin(), TypesWithHandlers.end()); 25781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2579c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler prev = TypesWithHandlers[0]; 2580c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl for (unsigned i = 1; i < TypesWithHandlers.size(); ++i) { 2581c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler curr = TypesWithHandlers[i]; 25821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2583c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (curr == prev) { 2584c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(curr.getTypeSpecStartLoc(), 2585c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::warn_exception_caught_by_earlier_handler) 2586c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << curr.getCatchStmt()->getCaughtType().getAsString(); 2587c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(prev.getTypeSpecStartLoc(), 2588c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::note_previous_exception_handler) 2589c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << prev.getCatchStmt()->getCaughtType().getAsString(); 2590c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 25911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2592c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl prev = curr; 2593c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 25948351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 25951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2596781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 2597b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 25988351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 25998351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 26008351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 26018351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 26028351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 26038351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 26049ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(CXXTryStmt::Create(Context, TryLoc, TryBlock, 2605a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig Handlers, NumHandlers)); 26068351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 260728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 260828bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 260928bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHTryBlock(bool IsCXXTry, 261028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley SourceLocation TryLoc, 261128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *TryBlock, 261228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Handler) { 261328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(TryBlock && Handler); 261428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 261528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley getCurFunction()->setHasBranchProtectedScope(); 261628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 261728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHTryStmt::Create(Context,IsCXXTry,TryLoc,TryBlock,Handler)); 261828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 261928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 262028bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 262128bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHExceptBlock(SourceLocation Loc, 262228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Expr *FilterExpr, 262328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Block) { 262428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(FilterExpr && Block); 262528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 262628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley if(!FilterExpr->getType()->isIntegerType()) { 262758f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet return StmtError(Diag(FilterExpr->getExprLoc(), 262858f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet diag::err_filter_expression_integral) 262958f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet << FilterExpr->getType()); 263028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley } 263128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 263228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHExceptStmt::Create(Context,Loc,FilterExpr,Block)); 263328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 263428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 263528bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 263628bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHFinallyBlock(SourceLocation Loc, 263728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Block) { 263828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(Block); 263928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHFinallyStmt::Create(Context,Loc,Block)); 264028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 2641ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor 2642ba0513de93d2fab6db5ab30b6927209fcc883078Douglas GregorStmtResult Sema::BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2643ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor bool IsIfExists, 2644ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor NestedNameSpecifierLoc QualifierLoc, 2645ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor DeclarationNameInfo NameInfo, 2646ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor Stmt *Nested) 2647ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor{ 2648ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor return new (Context) MSDependentExistsStmt(KeywordLoc, IsIfExists, 2649ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor QualifierLoc, NameInfo, 2650ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor cast<CompoundStmt>(Nested)); 2651ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor} 2652ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor 2653ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor 2654ba0513de93d2fab6db5ab30b6927209fcc883078Douglas GregorStmtResult Sema::ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2655ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor bool IsIfExists, 2656ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor CXXScopeSpec &SS, 2657ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor UnqualifiedId &Name, 2658ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor Stmt *Nested) { 2659ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor return BuildMSDependentExistsStmt(KeywordLoc, IsIfExists, 2660ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor SS.getWithLocInContext(Context), 2661ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor GetNameFromUnqualifiedId(Name), 2662ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor Nested); 2663ba0513de93d2fab6db5ab30b6927209fcc883078Douglas Gregor} 2664