SemaStmt.cpp revision e50b01531afcb4afc40d27720afa09613ddcdfa2
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" 1951fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson#include "clang/AST/APValue.h" 20f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner#include "clang/AST/ASTContext.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. 81f85e193739c953358c865005855253af4f68a497John McCall if (getLangOptions().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; 155df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (!E->isUnusedResultAWarning(Loc, R1, R2, Context)) 156636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 1571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 158419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // Okay, we have an unused result. Depending on what the base expression is, 159419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // we might want to make a more specific diagnostic. Check for one of these 160419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // cases now. 161419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner unsigned DiagID = diag::warn_unused_expr; 1624765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall if (const ExprWithCleanups *Temps = dyn_cast<ExprWithCleanups>(E)) 1634dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor E = Temps->getSubExpr(); 16434d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth if (const CXXBindTemporaryExpr *TempExpr = dyn_cast<CXXBindTemporaryExpr>(E)) 16534d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth E = TempExpr->getSubExpr(); 16612f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall 167ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth if (DiagnoseUnusedComparison(*this, E)) 168ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth return; 169ec8058f64bbcd79bd47748f4cf8628123dd3bae6Chandler Carruth 170f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall E = E->IgnoreParenImpCasts(); 171bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { 1720faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall if (E->getType()->isVoidType()) 1730faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall return; 1740faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall 175bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // If the callee has attribute pure, const, or warn_unused_result, warn with 176bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // a more specific message to make it clear what is happening. 177d20254f2875d0004c57ee766f258dbcee29f4841Nuno Lopes if (const Decl *FD = CE->getCalleeDecl()) { 178bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<WarnUnusedResultAttr>()) { 17942d7b2d25b6f90dc397886d05502b10ab5a8b51bMatt Beaumont-Gay Diag(Loc, diag::warn_unused_result) << R1 << R2; 180bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 181bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 182bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<PureAttr>()) { 183bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "pure"; 184bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 185bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 186bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<ConstAttr>()) { 187bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "const"; 188bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 189bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 190dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 19112f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (const ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(E)) { 192f85e193739c953358c865005855253af4f68a497John McCall if (getLangOptions().ObjCAutoRefCount && ME->isDelegateInitCall()) { 193f85e193739c953358c865005855253af4f68a497John McCall Diag(Loc, diag::err_arc_unused_init_message) << R1; 194f85e193739c953358c865005855253af4f68a497John McCall return; 195f85e193739c953358c865005855253af4f68a497John McCall } 196f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian const ObjCMethodDecl *MD = ME->getMethodDecl(); 197f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian if (MD && MD->getAttr<WarnUnusedResultAttr>()) { 19842d7b2d25b6f90dc397886d05502b10ab5a8b51bMatt Beaumont-Gay Diag(Loc, diag::warn_unused_result) << R1 << R2; 199f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian return; 200f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 20112f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (isa<ObjCPropertyRefExpr>(E)) { 20212f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall DiagID = diag::warn_unused_property_expr; 203d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor } else if (const CXXFunctionalCastExpr *FC 204d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor = dyn_cast<CXXFunctionalCastExpr>(E)) { 205d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor if (isa<CXXConstructExpr>(FC->getSubExpr()) || 206d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor isa<CXXTemporaryObjectExpr>(FC->getSubExpr())) 207d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor return; 208f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 209209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // Diagnose "(void*) blah" as a typo for "(void) blah". 210209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall else if (const CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(E)) { 211209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall TypeSourceInfo *TI = CE->getTypeInfoAsWritten(); 212209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall QualType T = TI->getType(); 213209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 214209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // We really do want to use the non-canonical type here. 215209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall if (T == Context.VoidPtrTy) { 216209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall PointerTypeLoc TL = cast<PointerTypeLoc>(TI->getTypeLoc()); 217209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 218209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall Diag(Loc, diag::warn_unused_voidptr) 219209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall << FixItHint::CreateRemoval(TL.getStarLoc()); 220209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall return; 221209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 222209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 223209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 224351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek DiagRuntimeBehavior(Loc, 0, PDiag(DiagID) << R1 << R2); 225636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson} 226636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 22760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2281b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 229a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 230a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 231a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 232c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 233c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 234c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus) { 235c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 236c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 237c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 238c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 239c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 240c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 241c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 242c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 243c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 2441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 245c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 2464afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 247c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 248c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 249c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 25098414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 25198414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 252636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson // Ignore statements that are last in a statement expression. 253636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (isStmtExpr && i == NumElts - 1) 25498414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 2551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 256636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson DiagnoseUnusedExprResult(Elts[i]); 25798414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 258a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 2598189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 26260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2639ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2649ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation DotDotDotLoc, Expr *RHSVal, 26524e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 2669ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert((LHSVal != 0) && "missing expression in case statement"); 267117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.4.2p3: The expression shall be an integer constant. 2691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // However, GCC allows any evaluatable integer expression. 2701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!LHSVal->isTypeDependent() && !LHSVal->isValueDependent() && 271dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(LHSVal)) 27224e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2746c36be5b383875b490684bcf439d6d427298c1afChris Lattner // GCC extension: The expression shall be an integer constant. 275117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 276dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (RHSVal && !RHSVal->isTypeDependent() && !RHSVal->isValueDependent() && 277dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(RHSVal)) { 278f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner RHSVal = 0; // Recover by just forgetting about it. 279117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl } 280117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 281781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 2828a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner Diag(CaseLoc, diag::err_case_not_in_switch); 28324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 2848a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 286dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc, DotDotDotLoc, 287dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ColonLoc); 288781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(CS); 289117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 29224e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 2939ae2f076ca5ab1feb3ba95629099ec2319833701John McCallvoid Sema::ActOnCaseStmtBody(Stmt *caseStmt, Stmt *SubStmt) { 2945440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth DiagnoseUnusedExprResult(SubStmt); 2955440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth 29624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 29724e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 29824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 29924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 30060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 3011eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 3029ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SubStmt, Scope *CurScope) { 3035440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth DiagnoseUnusedExprResult(SubStmt); 3045440bfaff6aec058b60bc6da75bb4f13b7a76491Chandler Carruth 305781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 3060fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 307117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 3080fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 309117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 310dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, ColonLoc, SubStmt); 311781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(DS); 312117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 31560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 31657ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerSema::ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 31757ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation ColonLoc, Stmt *SubStmt) { 31857ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner 319ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // If the label was multiply defined, reject it now. 320ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner if (TheDecl->getStmt()) { 321ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << TheDecl->getDeclName(); 322ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(TheDecl->getLocation(), diag::note_previous_definition); 323de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 3245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 325de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 326ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // Otherwise, things are good. Fill in the declaration and return it. 327ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner LabelStmt *LS = new (Context) LabelStmt(IdentLoc, TheDecl, SubStmt); 328ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setStmt(LS); 329203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara if (!TheDecl->isGnuLocal()) 330203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara TheDecl->setLocation(IdentLoc); 331ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(LS); 3325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 33460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 335d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, Decl *CondVar, 33644aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *thenStmt, SourceLocation ElseLoc, 33744aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *elseStmt) { 33860d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(CondVal.release()); 3391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3408cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor VarDecl *ConditionVar = 0; 341d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 342d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 343586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, IfLoc, true); 34499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 34599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 3468cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor } 34799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 34899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 34999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 350dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 351754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(thenStmt); 3525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3532d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 3542d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 3552d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 3562d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 357b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek // 3589ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!elseStmt) { 3592d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 360a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // But do not warn if the body is a macro that expands to nothing, e.g: 361a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 362a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // #define CALL(x) 363a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // if (condition) 364a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // CALL(0); 365a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 36644aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis if (!stmt->hasLeadingEmptyMacro()) 367b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 3682d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 3692d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 370754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(elseStmt); 3711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 372dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) IfStmt(Context, IfLoc, ConditionVar, ConditionExpr, 37344aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis thenStmt, ElseLoc, elseStmt)); 3745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 376f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 377f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 378f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 379f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 380f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 3811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, 382f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 383f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 384f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 385f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 3869f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(NewWidth); 387f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 388f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor 389f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // If the input was signed and negative and the output is 390f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // unsigned, don't bother to warn: this is implementation-defined 391f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // behavior. 392f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 393f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 394f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 395f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 3969f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.trunc(NewWidth); 397b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 3989f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.extend(Val.getBitWidth()); 399b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 400f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 401d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 4021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 403f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 404f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 4059f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(NewWidth); 406b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 407f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 408f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 409f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 410dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // We don't diagnose this overflow, because it is implementation-defined 4112853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // behavior. 4122853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 413f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 414f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 415f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 416f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 417f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 4180471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 4190471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 4200471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 4210471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 4220471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 4230471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 4240e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 4250e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 4260e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 4270e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 4280471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 4290471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 4300471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 4310471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 4320471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 4330471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 4340471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 435764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 436764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 437764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 438764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 439764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 440764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 441764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 442764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 443764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 444764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 445764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 446764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 447764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 448764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 449ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// CmpEnumVals - Comparison predicate for sorting enumeration values. 450ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 451ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool CmpEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 452ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 453ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 454ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first < rhs.first; 455ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 456ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 457ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// EqEnumVals - Comparison preficate for uniqing enumeration values. 458ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 459ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool EqEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 460ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 461ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 462ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first == rhs.first; 463ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 464ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 4655f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// GetTypeBeforeIntegralPromotion - Returns the pre-promotion type of 4665f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// potentially integral-promoted expression @p expr. 467a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCallstatic QualType GetTypeBeforeIntegralPromotion(Expr *&expr) { 468a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(expr)) 469a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall expr = cleanups->getSubExpr(); 470a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall while (ImplicitCastExpr *impcast = dyn_cast<ImplicitCastExpr>(expr)) { 471a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (impcast->getCastKind() != CK_IntegralCast) break; 472a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall expr = impcast->getSubExpr(); 4735f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 4745f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return expr->getType(); 4755f04881eb025f61396d0555d8173730fe2759e0aChris Lattner} 4765f04881eb025f61396d0555d8173730fe2759e0aChris Lattner 47760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 478dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, Expr *Cond, 479d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall Decl *CondVar) { 48060d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult; 4819ae2f076ca5ab1feb3ba95629099ec2319833701John McCall 482586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor VarDecl *ConditionVar = 0; 483d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 484d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 4859ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult = CheckConditionVariable(ConditionVar, SourceLocation(), false); 4869ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 487586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 488dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4899ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.release(); 490586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 491dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4929ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Cond) 493586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 494dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4959ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult 496dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = ConvertToIntegralOrEnumerationType(SwitchLoc, Cond, 497c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_typecheck_statement_requires_integer), 498c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_incomplete_class_type) 4999ae2f076ca5ab1feb3ba95629099ec2319833701John McCall << Cond->getSourceRange(), 500c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_explicit_conversion), 501c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::note_switch_conversion), 502c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_multiple_conversions), 5036bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(diag::note_switch_conversion), 5046bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(0)); 5059ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) return StmtError(); 5069ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 507dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 508a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 509a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall CondResult = UsualUnaryConversions(Cond); 510a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (CondResult.isInvalid()) return StmtError(); 511a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall Cond = CondResult.take(); 512a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall 513d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (!CondVar) { 514b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, SwitchLoc); 5154765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall CondResult = MaybeCreateExprWithCleanups(Cond); 5169ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 517586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 5189ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 519586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 520b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 521781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchIntoScope(); 522dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 5239ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = new (Context) SwitchStmt(Context, ConditionVar, Cond); 524781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.push_back(SS); 525586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return Owned(SS); 5267e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner} 5277e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner 52828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greifstatic void AdjustAPSInt(llvm::APSInt &Val, unsigned BitWidth, bool IsSigned) { 52928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif if (Val.getBitWidth() < BitWidth) 5309f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(BitWidth); 53128164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif else if (Val.getBitWidth() > BitWidth) 5329f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(BitWidth); 53328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Val.setIsSigned(IsSigned); 53428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif} 53528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif 53660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 5379ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, Stmt *Switch, 5389ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *BodyStmt) { 5399ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = cast<SwitchStmt>(Switch); 540781472fe99a120098c631b0cbe33c89f8cef5e70John McCall assert(SS == getCurFunction()->SwitchStack.back() && 541781472fe99a120098c631b0cbe33c89f8cef5e70John McCall "switch stack missing push/pop!"); 542de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 5439dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 544781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.pop_back(); 545c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 546f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 547a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall if (!CondExpr) return StmtError(); 548de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 549a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor QualType CondType = CondExpr->getType(); 550a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall 551a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall Expr *CondExprBeforePromotion = CondExpr; 552a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall QualType CondTypeBeforePromotion = 553a8e0cd8cdecc7e0ba1792e46773b884c6eed4829John McCall GetTypeBeforeIntegralPromotion(CondExprBeforePromotion); 55484fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor 5555f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // C++ 6.4.2.p2: 5565f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // Integral promotions are performed (on the switch condition). 5575f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // 5585f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // A case value unrepresentable by the original switch condition 5595f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // type (before the promotion) doesn't make sense, even when it can 5605f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // be represented by the promoted type. Therefore we need to find 5615f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // the pre-promotion type of the switch condition. 56212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondExpr->isTypeDependent()) { 563acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // We have already converted the expression to an integral or enumeration 564dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // type, when we started the switch statement. If we don't have an 565acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // appropriate type now, just return an error. 566acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor if (!CondType->isIntegralOrEnumerationType()) 56712356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan return StmtError(); 56812356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan 5692b334bb3126a67895813e49e6228dad4aec0b4d6Chris Lattner if (CondExpr->isKnownToHaveBooleanValue()) { 57012356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(bool_expr) {...} is often a programmer error, e.g. 57112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(n && mask) { ... } // Doh - should be "n & mask". 57212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // One can always use an if statement instead of switch(bool_expr). 57312356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::warn_bool_switch_condition) 57412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondExpr->getSourceRange(); 57512356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 576c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 577de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 578f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 579f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 5801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HasDependentValue 581dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 5821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned CondWidth 5831d6ab7af99a1fc059a6aa5da083640c1d94b07f7Chris Lattner = HasDependentValue ? 0 : Context.getIntWidth(CondTypeBeforePromotion); 584575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool CondIsSigned 585575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor = CondTypeBeforePromotion->isSignedIntegerOrEnumerationType(); 5861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 587f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 588f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 589f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 5905f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner typedef SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 5910471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 5921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 593f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 594ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRangesTy; 595ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy CaseRanges; 5961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 597f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 5981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 599b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 6001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 601dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 602c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 6031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 604c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 605f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 606f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 6075f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 608de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 609f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 610390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 611390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 612390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 613b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 614c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 615f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 6161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 617f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 618f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 6191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 620f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 621f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 6221e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 623dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 624dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 625dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 626dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 627dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 629a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith llvm::APSInt LoVal = Lo->EvaluateKnownConstInt(Context); 6301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 631f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 632f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 63328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Lo->getLocStart(), 634f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 6356c36be5b383875b490684bcf439d6d427298c1afChris Lattner 6361e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 6371e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 638429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Lo = ImpCastExprToType(Lo, CondType, CK_IntegralCast).take(); 6391e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 6401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 641b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 642dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 6431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CS->getRHS()->isTypeDependent() || 644dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 645dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 646dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 647dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 648f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 6491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 650b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 651f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 652f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 653b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 654dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 6550fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // If we don't have a default statement, check whether the 6560fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // condition is constant. 6570fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt ConstantCondValue; 6580fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool HasConstantCond = false; 6590fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool ShouldCheckConstantCond = false; 6600fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!HasDependentValue && !TheDefaultStmt) { 6610fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr::EvalResult Result; 6620fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall HasConstantCond = CondExprBeforePromotion->Evaluate(Result, Context); 6630fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (HasConstantCond) { 6640fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(Result.Val.isInt() && "switch condition evaluated to non-int"); 6650fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue = Result.Val.getInt(); 6660fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = true; 6670fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6680fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(ConstantCondValue.getBitWidth() == CondWidth && 6690fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue.isSigned() == CondIsSigned); 6700fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 6710fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 6720fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 673dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 674dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 675dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 676dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 6770fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (unsigned i = 0, e = CaseVals.size(); i != e; ++i) { 6780fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 6790fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CaseVals[i].first == ConstantCondValue) 6800fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6810fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6820fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (i != 0 && CaseVals[i].first == CaseVals[i-1].first) { 683dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 6841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(CaseVals[i].second->getLHS()->getLocStart(), 6850fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall diag::err_duplicate_case) << CaseVals[i].first.toString(10); 6860fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CaseVals[i-1].second->getLHS()->getLocStart(), 687dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 688390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 689390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 690dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 691dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6926efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 693b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 6941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 695dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 696dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 697dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 698dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 699dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 700dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 7011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 702dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 703dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 704dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 7050fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt &LoVal = CaseRanges[i].first; 706dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 707dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 708a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith llvm::APSInt HiVal = Hi->EvaluateKnownConstInt(Context); 7091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 710dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 711dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 71228164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocStart(), 713dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 7141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 715dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the LHS is not the same type as the condition, insert an implicit 716dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // cast. 717429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Hi = ImpCastExprToType(Hi, CondType, CK_IntegralCast).take(); 718dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 7191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 720dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 7210fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (LoVal > HiVal) { 722dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 723dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 72428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocEnd()); 725dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 726dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 727dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 728dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7290fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7300fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 7310fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall LoVal <= ConstantCondValue && 7320fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue <= HiVal) 7330fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 7340fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 735dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 7360471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 7371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 738dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 739dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 740dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 741dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 742dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 743dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 744dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 7451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 746dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 747dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 748dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 749dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 7501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 751dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 752dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 753dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 754dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 755dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 756dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 757dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 758dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 759dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 761dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 762dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 763dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 764dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 765dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 766dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 768dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 769dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 770dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 771dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 772dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 773dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 775dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 776dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 777dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 778dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 7791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(OverlapStmt->getLHS()->getLocStart(), 780dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 781390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 782390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 783dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 784dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7850471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 786b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 787ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7880fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Complain if we have a constant condition and we didn't find a match. 7890fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!CaseListIsErroneous && ShouldCheckConstantCond) { 7900fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // TODO: it would be nice if we printed enums as enums, chars as 7910fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // chars, etc. 7920fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CondExpr->getExprLoc(), diag::warn_missing_case_for_condition) 7930fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ConstantCondValue.toString(10) 7940fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << CondExpr->getSourceRange(); 7950fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 7960fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7970fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Check to see if switch is over an Enum and handles all of its 798559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // values. We only issue a warning if there is not 'default:', but 799559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // we still do the analysis to preserve this information in the AST 800559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // (which can be used by flow-based analyes). 8010fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // 802ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner const EnumType *ET = CondTypeBeforePromotion->getAs<EnumType>(); 803559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 804ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // If switch has default case, then ignore it. 805559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!CaseListIsErroneous && !HasConstantCond && ET) { 806ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const EnumDecl *ED = ET->getDecl(); 8075f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner typedef SmallVector<std::pair<llvm::APSInt, EnumConstantDecl*>, 64> 80858f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet EnumValsTy; 809ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy EnumVals; 810ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 8110fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Gather all enum values, set their type and sort them, 8120fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // allowing easier comparison with CaseVals. 8130fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (EnumDecl::enumerator_iterator EDI = ED->enumerator_begin(); 81428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EDI != ED->enumerator_end(); ++EDI) { 81528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif llvm::APSInt Val = EDI->getInitVal(); 81628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Val, CondWidth, CondIsSigned); 81728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EnumVals.push_back(std::make_pair(Val, *EDI)); 818ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 819ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor std::stable_sort(EnumVals.begin(), EnumVals.end(), CmpEnumVals); 8200fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall EnumValsTy::iterator EIend = 8210fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall std::unique(EnumVals.begin(), EnumVals.end(), EqEnumVals); 822559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 823559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // See which case values aren't in enum. 824559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // TODO: we might want to check whether case values are out of the 825559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // enum even if we don't want to check whether all cases are handled. 826559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!TheDefaultStmt) { 82747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EnumValsTy::const_iterator EI = EnumVals.begin(); 82847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseValsTy::const_iterator CI = CaseVals.begin(); 8290fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CI != CaseVals.end(); CI++) { 83047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < CI->first) 83147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 83247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first > CI->first) 8330fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 8340fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ED->getDeclName(); 83547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 83647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek // See which of case ranges aren't in enum 83747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI = EnumVals.begin(); 83847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseRangesTy::const_iterator RI = CaseRanges.begin(); 8390fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall RI != CaseRanges.end() && EI != EIend; RI++) { 84047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < RI->first) 84147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 842dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 84347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != RI->first) { 84447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 84547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 84647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 847e0ba9d1beeba01a96808c2fc61f9ca89acec313bTed Kremenek 848a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith llvm::APSInt Hi = 849a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith RI->second->getRHS()->EvaluateKnownConstInt(Context); 85028164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 85147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < Hi) 85247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 85347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != Hi) 85447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getRHS()->getExprLoc(), diag::warn_not_in_enum) 85547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 85647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 857ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 858dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 859559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Check which enum vals aren't in switch 860ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseValsTy::const_iterator CI = CaseVals.begin(); 861ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy::const_iterator RI = CaseRanges.begin(); 862559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek bool hasCasesNotInSwitch = false; 863559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 8645f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeclarationName,8> UnhandledNames; 865dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 866559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek for (EnumValsTy::const_iterator EI = EnumVals.begin(); EI != EIend; EI++){ 867ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Drop unneeded case values 868ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt CIVal; 869ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (CI != CaseVals.end() && CI->first < EI->first) 870ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CI++; 871dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 872ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (CI != CaseVals.end() && CI->first == EI->first) 873ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor continue; 874ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 875559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Drop unneeded case ranges 876ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (; RI != CaseRanges.end(); RI++) { 877a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith llvm::APSInt Hi = 878a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith RI->second->getRHS()->EvaluateKnownConstInt(Context); 87928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 880ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI->first <= Hi) 881ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor break; 882ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 883ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 884559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (RI == CaseRanges.end() || EI->first < RI->first) { 88547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek hasCasesNotInSwitch = true; 88647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (!TheDefaultStmt) 887ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner UnhandledNames.push_back(EI->second->getDeclName()); 88847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 889ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 890dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 891ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Produce a nice diagnostic if multiple values aren't handled. 892ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner switch (UnhandledNames.size()) { 893ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 0: break; 894ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 1: 895ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case1) 896ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0]; 897ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 898ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 2: 899ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case2) 900ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1]; 901ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 902ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 3: 903ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case3) 904ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 905ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 906ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner default: 907ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_cases) 908ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << (unsigned)UnhandledNames.size() 909ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 910ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 911ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner } 912559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 913559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!hasCasesNotInSwitch) 91447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek SS->setAllEnumCasesCovered(); 915ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 916b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 917dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 918390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 919390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 920b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 921de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 922de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 923de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 9245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 92660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 927dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, 9289ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Decl *CondVar, Stmt *Body) { 92960d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(Cond.release()); 930dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9315656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor VarDecl *ConditionVar = 0; 932d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 933d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 934586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, WhileLoc, true); 93599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 93699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 9375656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor } 9389ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *ConditionExpr = CondResult.take(); 93999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 94099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 941dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9429ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 9431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 94443dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor return Owned(new (Context) WhileStmt(Context, ConditionVar, ConditionExpr, 9459ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Body, WhileLoc)); 9465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 94860d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 9499ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 950989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 9519ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Cond, SourceLocation CondRParen) { 9529ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert(Cond && "ActOnDoStmt(): missing expression"); 953f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 954429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult CondResult = CheckBooleanCondition(Cond, DoLoc); 955429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (CondResult.isInvalid() || CondResult.isInvalid()) 9565a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 957429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Cond = CondResult.take(); 9585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 959b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, DoLoc); 960429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CondResult = MaybeCreateExprWithCleanups(Cond); 9619ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 962586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 9639ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 964dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9659ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 966754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 9679ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) DoStmt(Body, Cond, DoLoc, WhileLoc, CondRParen)); 9685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 97060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 971f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 9729ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, FullExprArg second, Decl *secondVar, 97399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor FullExprArg third, 9749ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 9755921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 9765921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 977f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 978f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 979f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 9805921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 9815921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 9825921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 983b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD && VD->isLocalVarDecl() && !VD->hasLocalStorage()) 9845921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 9855921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 9865921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 9875921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 9885921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 989ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 9905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 99199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 99260d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult SecondResult(second.release()); 99399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor VarDecl *ConditionVar = 0; 994d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (secondVar) { 995d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(secondVar); 996586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor SecondResult = CheckConditionVariable(ConditionVar, ForLoc, true); 99799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (SecondResult.isInvalid()) 99899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 99999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor } 1000dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 100199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Third = third.release().takeAs<Expr>(); 1002dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 10033af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(First); 10043af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(Third); 1005754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(Body); 1006754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 1007dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) ForStmt(Context, First, 1008dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi SecondResult.take(), ConditionVar, 1009dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Third, Body, ForLoc, LParenLoc, 101043dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor RParenLoc)); 10115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1013f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// In an Objective C collection iteration statement: 1014f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// for (x in y) 1015f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// x can be an arbitrary l-value expression. Bind it up as a 1016f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// full-expression. 1017f6a1648197562e0b133440d612d9af297d0a86ccJohn McCallStmtResult Sema::ActOnForEachLValueExpr(Expr *E) { 1018f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall CheckImplicitConversions(E); 10194765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall ExprResult Result = MaybeCreateExprWithCleanups(E); 1020f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall if (Result.isInvalid()) return StmtError(); 1021f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall return Owned(static_cast<Stmt*>(Result.get())); 1022f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall} 1023f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall 1024990567cb60e8530ba01b41d4e056e32b44b95ec0John McCallExprResult 1025990567cb60e8530ba01b41d4e056e32b44b95ec0John McCallSema::ActOnObjCForCollectionOperand(SourceLocation forLoc, Expr *collection) { 1026990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall assert(collection); 1027990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1028990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Bail out early if we've got a type-dependent expression. 1029990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (collection->isTypeDependent()) return Owned(collection); 1030990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1031990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Perform normal l-value conversion. 1032990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ExprResult result = DefaultFunctionArrayLvalueConversion(collection); 1033990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (result.isInvalid()) 1034990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return ExprError(); 1035990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall collection = result.take(); 1036990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1037990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // The operand needs to have object-pointer type. 1038990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // TODO: should we do a contextual conversion? 1039990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall const ObjCObjectPointerType *pointerType = 1040990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall collection->getType()->getAs<ObjCObjectPointerType>(); 1041990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!pointerType) 1042990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return Diag(forLoc, diag::err_collection_expr_type) 1043990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall << collection->getType() << collection->getSourceRange(); 1044990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1045990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Check that the operand provides 1046990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // - countByEnumeratingWithState:objects:count: 1047990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall const ObjCObjectType *objectType = pointerType->getObjectType(); 1048990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ObjCInterfaceDecl *iface = objectType->getInterface(); 1049990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1050990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If we have a forward-declared type, we can't do this check. 1051990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (iface && iface->isForwardDecl()) { 1052990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // This is ill-formed under ARC. 1053990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (getLangOptions().ObjCAutoRefCount) { 1054990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Diag(forLoc, diag::err_arc_collection_forward) 1055990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall << pointerType->getPointeeType() << collection->getSourceRange(); 1056990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1057990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1058990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Otherwise, if we have any useful type information, check that 1059990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // the type declares the appropriate method. 1060990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } else if (iface || !objectType->qual_empty()) { 1061990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall IdentifierInfo *selectorIdents[] = { 1062990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("countByEnumeratingWithState"), 1063990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("objects"), 1064990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("count") 1065990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall }; 1066990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Selector selector = Context.Selectors.getSelector(3, &selectorIdents[0]); 1067990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1068990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ObjCMethodDecl *method = 0; 1069990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1070990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If there's an interface, look in both the public and private APIs. 1071990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (iface) { 1072990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall method = iface->lookupInstanceMethod(selector); 1073990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) method = LookupPrivateInstanceMethod(selector, iface); 1074990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1075990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1076990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Also check protocol qualifiers. 1077990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) 1078990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall method = LookupMethodInQualifiedType(selector, pointerType, 1079990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall /*instance*/ true); 1080990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1081990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If we didn't find it anywhere, give up. 1082990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) { 1083990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Diag(forLoc, diag::warn_collection_expr_type) 1084990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall << collection->getType() << selector << collection->getSourceRange(); 1085990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1086990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1087990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // TODO: check for an incompatible signature? 1088990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1089990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1090990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Wrap up any cleanups in the expression. 1091990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return Owned(MaybeCreateExprWithCleanups(collection)); 1092990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall} 1093990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 109460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1095f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 1096f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 10979ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, Expr *Second, 10989ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 109920552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 110020552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 110120552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 11027e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 1103f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 1104f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 1105f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 1106f85e193739c953358c865005855253af4f68a497John McCall VarDecl *D = cast<VarDecl>(DS->getSingleDecl()); 1107f85e193739c953358c865005855253af4f68a497John McCall FirstType = D->getType(); 1108f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 1109f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 1110f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 1111f85e193739c953358c865005855253af4f68a497John McCall if (!D->hasLocalStorage()) 1112f85e193739c953358c865005855253af4f68a497John McCall return StmtError(Diag(D->getLocation(), 1113f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 11141fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 1115c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor Expr *FirstE = cast<Expr>(First); 11167eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (!FirstE->isTypeDependent() && !FirstE->isLValue()) 1117f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 1118f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 1119f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 11201fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 11211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FirstType = static_cast<Expr*>(First)->getType(); 11221fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 1123c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (!FirstType->isDependentType() && 1124c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor !FirstType->isObjCObjectPointerType() && 1125a5e42a82ce055f29f3733f3a1f10da6cb9877deeFariborz Jahanian !FirstType->isBlockPointerType()) 1126dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 1127d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 11283ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 1129990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 11308189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 11318189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 11323ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 11335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1134ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithnamespace { 1135ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1136ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithenum BeginEndFunction { 1137ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_begin, 1138ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_end 1139ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith}; 1140ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1141ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Build a variable declaration for a for-range statement. 1142ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic VarDecl *BuildForRangeVarDecl(Sema &SemaRef, SourceLocation Loc, 1143ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType Type, const char *Name) { 1144ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclContext *DC = SemaRef.CurContext; 1145ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IdentifierInfo *II = &SemaRef.PP.getIdentifierTable().get(Name); 1146ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TypeSourceInfo *TInfo = SemaRef.Context.getTrivialTypeSourceInfo(Type, Loc); 1147ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *Decl = VarDecl::Create(SemaRef.Context, DC, Loc, Loc, II, Type, 1148ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TInfo, SC_Auto, SC_None); 1149b403d6d746239095a2c7bac958c924d92434e2b4Richard Smith Decl->setImplicit(); 1150ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return Decl; 1151ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1152ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1153ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Finish building a variable declaration for a for-range statement. 1154ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// \return true if an error occurs. 1155ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic bool FinishForRangeVarDecl(Sema &SemaRef, VarDecl *Decl, Expr *Init, 1156ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc, int diag) { 1157ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Deduce the type for the iterator variable now rather than leaving it to 1158ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // AddInitializerToDecl, so we can produce a more suitable diagnostic. 1159ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TypeSourceInfo *InitTSI = 0; 1160ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (Init->getType()->isVoidType() || 1161ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith !SemaRef.DeduceAutoType(Decl->getTypeSourceInfo(), Init, InitTSI)) 1162ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Loc, diag) << Init->getType(); 1163ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!InitTSI) { 1164ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setInvalidDecl(); 1165ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return true; 1166ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1167ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setTypeSourceInfo(InitTSI); 1168ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setType(InitTSI->getType()); 1169ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1170f85e193739c953358c865005855253af4f68a497John McCall // In ARC, infer lifetime. 1171f85e193739c953358c865005855253af4f68a497John McCall // FIXME: ARC may want to turn this into 'const __unsafe_unretained' if 1172f85e193739c953358c865005855253af4f68a497John McCall // we're doing the equivalent of fast iteration. 1173f85e193739c953358c865005855253af4f68a497John McCall if (SemaRef.getLangOptions().ObjCAutoRefCount && 1174f85e193739c953358c865005855253af4f68a497John McCall SemaRef.inferObjCARCLifetime(Decl)) 1175f85e193739c953358c865005855253af4f68a497John McCall Decl->setInvalidDecl(); 1176f85e193739c953358c865005855253af4f68a497John McCall 1177ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.AddInitializerToDecl(Decl, Init, /*DirectInit=*/false, 1178ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TypeMayContainAuto=*/false); 1179ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.FinalizeDeclaration(Decl); 1180b403d6d746239095a2c7bac958c924d92434e2b4Richard Smith SemaRef.CurContext->addHiddenDecl(Decl); 1181ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return false; 1182ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1183ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1184ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Produce a note indicating which begin/end function was implicitly called 1185ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// by a C++0x for-range statement. This is often not obvious from the code, 1186ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// nor from the diagnostics produced when analysing the implicit expressions 1187ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// required in a for-range statement. 1188ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithvoid NoteForRangeBeginEndFunction(Sema &SemaRef, Expr *E, 1189ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndFunction BEF) { 1190ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr *CE = dyn_cast<CallExpr>(E); 1191ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!CE) 1192ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return; 1193ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FunctionDecl *D = dyn_cast<FunctionDecl>(CE->getCalleeDecl()); 1194ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!D) 1195ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return; 1196ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc = D->getLocation(); 1197ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1198ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith std::string Description; 1199ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith bool IsTemplate = false; 1200ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FunctionTemplateDecl *FunTmpl = D->getPrimaryTemplate()) { 1201ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Description = SemaRef.getTemplateArgumentBindingsText( 1202ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FunTmpl->getTemplateParameters(), *D->getTemplateSpecializationArgs()); 1203ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IsTemplate = true; 1204ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1205ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1206ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Loc, diag::note_for_range_begin_end) 1207ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << BEF << IsTemplate << Description << E->getType(); 1208ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1209ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1210ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Build a call to 'begin' or 'end' for a C++0x for-range statement. If the 1211ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// given LookupResult is non-empty, it is assumed to describe a member which 1212ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// will be invoked. Otherwise, the function will be found via argument 1213ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// dependent lookup. 1214ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic ExprResult BuildForRangeBeginEndCall(Sema &SemaRef, Scope *S, 1215ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc, 1216ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *Decl, 1217ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndFunction BEF, 1218ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith const DeclarationNameInfo &NameInfo, 1219ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult &MemberLookup, 1220ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Range) { 1221ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult CallExpr; 1222ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!MemberLookup.empty()) { 1223ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult MemberRef = 1224ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.BuildMemberReferenceExpr(Range, Range->getType(), Loc, 1225ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*IsPtr=*/false, CXXScopeSpec(), 1226ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*Qualifier=*/0, MemberLookup, 1227ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TemplateArgs=*/0); 1228ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (MemberRef.isInvalid()) 1229ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1230ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr = SemaRef.ActOnCallExpr(S, MemberRef.get(), Loc, MultiExprArg(), 1231ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Loc, 0); 1232ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CallExpr.isInvalid()) 1233ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1234ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1235ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedSet<0> FoundNames; 1236ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // C++0x [stmt.ranged]p1: For the purposes of this name lookup, namespace 1237ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // std is an associated namespace. 1238ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedLookupExpr *Fn = 1239ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedLookupExpr::Create(SemaRef.Context, /*NamingClass=*/0, 1240ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NestedNameSpecifierLoc(), NameInfo, 1241ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*NeedsADL=*/true, /*Overloaded=*/false, 1242ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FoundNames.begin(), FoundNames.end(), 1243ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*LookInStdNamespace=*/true); 1244ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr = SemaRef.BuildOverloadedCallExpr(S, Fn, Fn, Loc, &Range, 1, Loc, 1245ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 0); 1246ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CallExpr.isInvalid()) { 1247ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Range->getLocStart(), diag::note_for_range_type) 1248ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << Range->getType(); 1249ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1250ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1251ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1252ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(SemaRef, Decl, CallExpr.get(), Loc, 1253ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1254ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(SemaRef, CallExpr.get(), BEF); 1255ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1256ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1257ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return CallExpr; 1258ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1259ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1260ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1261ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1262ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// ActOnCXXForRangeStmt - Check and build a C++0x for-range statement. 1263ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1264ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// C++0x [stmt.ranged]: 1265ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// A range-based for statement is equivalent to 1266ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1267ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// { 1268ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// auto && __range = range-init; 1269ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// for ( auto __begin = begin-expr, 1270ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// __end = end-expr; 1271ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// __begin != __end; 1272ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// ++__begin ) { 1273ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// for-range-declaration = *__begin; 1274ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// statement 1275ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// } 1276ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// } 1277ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1278ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// The body of the loop is not available yet, since it cannot be analysed until 1279ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// we have determined the type of the for-range-declaration. 1280ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult 1281ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithSema::ActOnCXXForRangeStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 1282ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Stmt *First, SourceLocation ColonLoc, Expr *Range, 1283ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RParenLoc) { 1284ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!First || !Range) 1285ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1286ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1287ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *DS = dyn_cast<DeclStmt>(First); 1288ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith assert(DS && "first part of for range not a decl stmt"); 1289ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1290ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!DS->isSingleDecl()) { 1291ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(DS->getStartLoc(), diag::err_type_defined_in_for_range); 1292ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1293ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1294ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DS->getSingleDecl()->isInvalidDecl()) 1295ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1296ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1297ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DiagnoseUnexpandedParameterPack(Range, UPPC_Expression)) 1298ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1299ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1300ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build auto && __range = range-init 1301ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RangeLoc = Range->getLocStart(); 1302ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *RangeVar = BuildForRangeVarDecl(*this, RangeLoc, 1303ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Context.getAutoRRefDeductType(), 1304ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__range"); 1305ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, RangeVar, Range, RangeLoc, 1306ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_deduction_failure)) 1307ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1308ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1309ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Claim the type doesn't contain auto: we've already done the checking. 1310ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclGroupPtrTy RangeGroup = 1311ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BuildDeclaratorGroup((Decl**)&RangeVar, 1, /*TypeMayContainAuto=*/false); 1312ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith StmtResult RangeDecl = ActOnDeclStmt(RangeGroup, RangeLoc, RangeLoc); 1313ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RangeDecl.isInvalid()) 1314ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1315ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1316ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return BuildCXXForRangeStmt(ForLoc, ColonLoc, RangeDecl.get(), 1317ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*BeginEndDecl=*/0, /*Cond=*/0, /*Inc=*/0, DS, 1318ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith RParenLoc); 1319ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1320ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1321ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// BuildCXXForRangeStmt - Build or instantiate a C++0x for-range statement. 1322ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult 1323ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithSema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc, 1324ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Stmt *RangeDecl, Stmt *BeginEnd, Expr *Cond, 1325ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Inc, Stmt *LoopVarDecl, 1326ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RParenLoc) { 1327ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Scope *S = getCurScope(); 1328ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1329ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *RangeDS = cast<DeclStmt>(RangeDecl); 1330ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *RangeVar = cast<VarDecl>(RangeDS->getSingleDecl()); 1331ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType RangeVarType = RangeVar->getType(); 1332ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1333ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *LoopVarDS = cast<DeclStmt>(LoopVarDecl); 1334ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *LoopVar = cast<VarDecl>(LoopVarDS->getSingleDecl()); 1335ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1336ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith StmtResult BeginEndDecl = BeginEnd; 1337ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult NotEqExpr = Cond, IncrExpr = Inc; 1338ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1339ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!BeginEndDecl.get() && !RangeVarType->isDependentType()) { 1340ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RangeLoc = RangeVar->getLocation(); 1341ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1342e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek const QualType RangeVarNonRefType = RangeVarType.getNonReferenceType(); 1343e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1344e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek ExprResult BeginRangeRef = BuildDeclRefExpr(RangeVar, RangeVarNonRefType, 1345e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1346e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRangeRef.isInvalid()) 1347e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1348e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1349e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek ExprResult EndRangeRef = BuildDeclRefExpr(RangeVar, RangeVarNonRefType, 1350e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1351e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (EndRangeRef.isInvalid()) 1352ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1353ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1354ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType AutoType = Context.getAutoDeductType(); 1355ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Range = RangeVar->getInit(); 1356ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Range) 1357ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1358ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType RangeType = Range->getType(); 1359ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1360ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RequireCompleteType(RangeLoc, RangeType, 1361ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith PDiag(diag::err_for_range_incomplete_type))) 1362ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1363ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1364ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build auto __begin = begin-expr, __end = end-expr. 1365ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *BeginVar = BuildForRangeVarDecl(*this, ColonLoc, AutoType, 1366ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__begin"); 1367ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *EndVar = BuildForRangeVarDecl(*this, ColonLoc, AutoType, 1368ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__end"); 1369ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1370ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build begin-expr and end-expr and attach to __begin and __end variables. 1371ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BeginExpr, EndExpr; 1372ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (const ArrayType *UnqAT = RangeType->getAsArrayTypeUnsafe()) { 1373ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - if _RangeT is an array type, begin-expr and end-expr are __range and 1374ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // __range + __bound, respectively, where __bound is the array bound. If 1375ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // _RangeT is an array of unknown size or an array of incomplete type, 1376ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // the program is ill-formed; 1377ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1378ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // begin-expr is __range. 1379e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginExpr = BeginRangeRef; 1380e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (FinishForRangeVarDecl(*this, BeginVar, BeginRangeRef.get(), ColonLoc, 1381ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1382ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1383ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1384ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1385ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1386ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Find the array bound. 1387ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BoundExpr; 1388ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(UnqAT)) 1389ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr = Owned(IntegerLiteral::Create(Context, CAT->getSize(), 13901dd986dff9ddfbec687975700770bb377988e9edRichard Trieu Context.getPointerDiffType(), 13911dd986dff9ddfbec687975700770bb377988e9edRichard Trieu RangeLoc)); 1392ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith else if (const VariableArrayType *VAT = 1393ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith dyn_cast<VariableArrayType>(UnqAT)) 1394ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr = VAT->getSizeExpr(); 1395ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith else { 1396ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Can't be a DependentSizedArrayType or an IncompleteArrayType since 1397ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // UnqAT is not incomplete and Range is not type-dependent. 1398b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Unexpected array type in for-range"); 1399ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1400ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1401ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // end-expr is __range + __bound. 1402e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek EndExpr = ActOnBinOp(S, ColonLoc, tok::plus, EndRangeRef.get(), 1403ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr.get()); 1404ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (EndExpr.isInvalid()) 1405ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1406ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, EndVar, EndExpr.get(), ColonLoc, 1407ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1408ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1409ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1410ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1411ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1412ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclarationNameInfo BeginNameInfo(&PP.getIdentifierTable().get("begin"), 1413ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc); 1414ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclarationNameInfo EndNameInfo(&PP.getIdentifierTable().get("end"), 1415ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc); 1416ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1417ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult BeginMemberLookup(*this, BeginNameInfo, LookupMemberName); 1418ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult EndMemberLookup(*this, EndNameInfo, LookupMemberName); 1419ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1420ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CXXRecordDecl *D = RangeType->getAsCXXRecordDecl()) { 1421ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - if _RangeT is a class type, the unqualified-ids begin and end are 1422ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // looked up in the scope of class _RangeT as if by class member access 1423ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // lookup (3.4.5), and if either (or both) finds at least one 1424ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // declaration, begin-expr and end-expr are __range.begin() and 1425ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // __range.end(), respectively; 1426ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupQualifiedName(BeginMemberLookup, D); 1427ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupQualifiedName(EndMemberLookup, D); 1428ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1429ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (BeginMemberLookup.empty() != EndMemberLookup.empty()) { 1430ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(ColonLoc, diag::err_for_range_member_begin_end_mismatch) 1431ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << RangeType << BeginMemberLookup.empty(); 1432ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1433ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1434ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1435ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - otherwise, begin-expr and end-expr are begin(__range) and 1436ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // end(__range), respectively, where begin and end are looked up with 1437ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // argument-dependent lookup (3.4.2). For the purposes of this name 1438ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // lookup, namespace std is an associated namespace. 1439ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1440ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1441ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, BeginVar, 1442ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_begin, BeginNameInfo, 1443e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginMemberLookup, 1444e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginRangeRef.get()); 1445ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (BeginExpr.isInvalid()) 1446ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1447ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1448ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith EndExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, EndVar, 1449ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_end, EndNameInfo, 1450e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek EndMemberLookup, EndRangeRef.get()); 1451ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (EndExpr.isInvalid()) 1452ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1453ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1454ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1455ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // C++0x [decl.spec.auto]p6: BeginType and EndType must be the same. 1456ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType BeginType = BeginVar->getType(), EndType = EndVar->getType(); 1457ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Context.hasSameType(BeginType, EndType)) { 1458ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(RangeLoc, diag::err_for_range_begin_end_types_differ) 1459ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << BeginType << EndType; 1460ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1461ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1462ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1463ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1464ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl *BeginEndDecls[] = { BeginVar, EndVar }; 1465ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Claim the type doesn't contain auto: we've already done the checking. 1466ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclGroupPtrTy BeginEndGroup = 1467ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BuildDeclaratorGroup(BeginEndDecls, 2, /*TypeMayContainAuto=*/false); 1468ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndDecl = ActOnDeclStmt(BeginEndGroup, ColonLoc, ColonLoc); 1469ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1470e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek const QualType BeginRefNonRefType = BeginType.getNonReferenceType(); 1471e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek ExprResult BeginRef = BuildDeclRefExpr(BeginVar, BeginRefNonRefType, 1472ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1473e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRef.isInvalid()) 1474e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1475e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1476ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult EndRef = BuildDeclRefExpr(EndVar, EndType.getNonReferenceType(), 1477ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1478e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (EndRef.isInvalid()) 1479e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1480ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1481ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check __begin != __end expression. 1482ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnBinOp(S, ColonLoc, tok::exclaimequal, 1483ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginRef.get(), EndRef.get()); 1484ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnBooleanCondition(S, ColonLoc, NotEqExpr.get()); 1485ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnFinishFullExpr(NotEqExpr.get()); 1486ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (NotEqExpr.isInvalid()) { 1487ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1488ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Context.hasSameType(BeginType, EndType)) 1489ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1490ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1491ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1492ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1493ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check ++__begin expression. 1494e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginRef = BuildDeclRefExpr(BeginVar, BeginRefNonRefType, 1495e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1496e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRef.isInvalid()) 1497e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1498e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1499ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IncrExpr = ActOnUnaryOp(S, ColonLoc, tok::plusplus, BeginRef.get()); 1500ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IncrExpr = ActOnFinishFullExpr(IncrExpr.get()); 1501ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (IncrExpr.isInvalid()) { 1502ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1503ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1504ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1505ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1506ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check *__begin expression. 1507e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek BeginRef = BuildDeclRefExpr(BeginVar, BeginRefNonRefType, 1508e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek VK_LValue, ColonLoc); 1509e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek if (BeginRef.isInvalid()) 1510e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek return StmtError(); 1511e50b01531afcb4afc40d27720afa09613ddcdfa2Ted Kremenek 1512ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult DerefExpr = ActOnUnaryOp(S, ColonLoc, tok::star, BeginRef.get()); 1513ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DerefExpr.isInvalid()) { 1514ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1515ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1516ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1517ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1518ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Attach *__begin as initializer for VD. 1519ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!LoopVar->isInvalidDecl()) { 1520ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith AddInitializerToDecl(LoopVar, DerefExpr.get(), /*DirectInit=*/false, 1521ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TypeMayContainAuto=*/true); 1522ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (LoopVar->isInvalidDecl()) 1523ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1524ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1525cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith } else { 1526cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith // The range is implicitly used as a placeholder when it is dependent. 1527cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith RangeVar->setUsed(); 1528ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1529ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1530ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return Owned(new (Context) CXXForRangeStmt(RangeDS, 1531ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith cast_or_null<DeclStmt>(BeginEndDecl.get()), 1532ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr.take(), IncrExpr.take(), 1533ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LoopVarDS, /*Body=*/0, ForLoc, 1534ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc, RParenLoc)); 1535ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1536ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1537ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// FinishCXXForRangeStmt - Attach the body to a C++0x for-range statement. 1538ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// This is a separate step from ActOnCXXForRangeStmt because analysis of the 1539ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// body cannot be performed until after the type of the range variable is 1540ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// determined. 1541ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult Sema::FinishCXXForRangeStmt(Stmt *S, Stmt *B) { 1542ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!S || !B) 1543ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1544ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1545ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith cast<CXXForRangeStmt>(S)->setBody(B); 1546ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return S; 1547ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1548ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 154957ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerStmtResult Sema::ActOnGotoStmt(SourceLocation GotoLoc, 155057ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation LabelLoc, 155157ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner LabelDecl *TheDecl) { 155257ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner getCurFunction()->setHasBranchIntoScope(); 1553ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setUsed(); 1554ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(new (Context) GotoStmt(TheDecl, GotoLoc, LabelLoc)); 15555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 15565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 155760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1558ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 15599ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E) { 1560bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 15615f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 15625f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 15632877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth QualType DestTy = Context.getPointerType(Context.VoidTy.withConst()); 1564429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult ExprRes = Owned(E); 15655f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 1566429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CheckSingleAssignmentConstraints(DestTy, ExprRes); 1567429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (ExprRes.isInvalid()) 1568429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1569429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley E = ExprRes.take(); 15702877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth if (DiagnoseAssignmentResult(ConvTy, StarLoc, DestTy, ETy, E, AA_Passing)) 15715f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 15725f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 1573b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 1574781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasIndirectGoto(); 1575b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 15765f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 15775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 15785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 157960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 15801b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 15815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 15825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 15835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 15844cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 15855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 15864cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 15878189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 15885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 15895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 159060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 15911b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 15925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 15935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 15945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 15954cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 15965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 15974cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 15988189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 15995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 16005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1601dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \brief Determine whether the given expression is a candidate for 1602f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// copy elision in either a return statement or a throw expression. 16035077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1604f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param ReturnType If we're determining the copy elision candidate for 1605f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// a return statement, this is the return type of the function. If we're 1606f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// determining the copy elision candidate for a throw expression, this will 1607f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// be a NULL type. 16085077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1609f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param E The expression being returned from the function or block, or 1610f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// being thrown. 16115077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 16124926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// \param AllowFunctionParameter Whether we allow function parameters to 16134926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// be considered NRVO candidates. C++ prohibits this for NRVO itself, but 16144926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// we re-use this logic to determine whether we should try to move as part of 16154926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// a return or throw (which does allow function parameters). 16165077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 16175077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \returns The NRVO candidate variable, if the return statement may use the 16185077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// NRVO, or NULL if there is no such candidate. 1619f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregorconst VarDecl *Sema::getCopyElisionCandidate(QualType ReturnType, 1620f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor Expr *E, 1621f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor bool AllowFunctionParameter) { 1622f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor QualType ExprType = E->getType(); 16233c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // - in a return statement in a function with ... 16243c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // ... a class return type ... 1625f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType.isNull()) { 1626f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType->isRecordType()) 1627f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1628f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // ... the same cv-unqualified type as the function return type ... 1629f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!Context.hasSameUnqualifiedType(ReturnType, ExprType)) 1630f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1631f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor } 1632dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1633dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // ... the expression is the name of a non-volatile automatic object 1634f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // (other than a function or catch-clause parameter)) ... 1635f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(E->IgnoreParens()); 16363c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!DR) 16375077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 16383c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 16393c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!VD) 16405077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 1641dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1642f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (VD->hasLocalStorage() && !VD->isExceptionVariable() && 1643d86c477fb5d3fc34864afecbbb5443da9355e8fbDouglas Gregor !VD->getType()->isReferenceType() && !VD->hasAttr<BlocksAttr>() && 1644f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor !VD->getType().isVolatileQualified() && 16454a46c77813af1241139b81a086b539e4d734cb86Douglas Gregor ((VD->getKind() == Decl::Var) || 16464a46c77813af1241139b81a086b539e4d734cb86Douglas Gregor (AllowFunctionParameter && VD->getKind() == Decl::ParmVar))) 16475077c3876beeaed32280af88244e8050078619a8Douglas Gregor return VD; 1648dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 16495077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 16503c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor} 16513c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor 165207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// \brief Perform the initialization of a potentially-movable value, which 165307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// is the result of return value. 1654cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// 1655cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// This routine implements C++0x [class.copy]p33, which attempts to treat 1656cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// returned lvalues as rvalues in certain cases (to prefer move construction), 1657cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// then falls back to treating them as lvalues if that failed. 1658dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiExprResult 165907f402cff25354c5f06f307f19b0c57c09d964bdDouglas GregorSema::PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 166007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor const VarDecl *NRVOCandidate, 166107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor QualType ResultType, 1662bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor Expr *Value, 1663bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor bool AllowNRVO) { 1664cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // C++0x [class.copy]p33: 1665dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // When the criteria for elision of a copy operation are met or would 1666dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // be met save for the fact that the source object is a function 1667dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // parameter, and the object to be copied is designated by an lvalue, 1668cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // overload resolution to select the constructor for the copy is first 1669cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // performed as if the object were designated by an rvalue. 1670cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor ExprResult Res = ExprError(); 1671bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor if (AllowNRVO && 1672bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor (NRVOCandidate || getCopyElisionCandidate(ResultType, Value, true))) { 1673dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ImplicitCastExpr AsRvalue(ImplicitCastExpr::OnStack, 167407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getType(), CK_LValueToRValue, 167507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value, VK_XValue); 1676dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1677cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Expr *InitExpr = &AsRvalue; 1678dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializationKind Kind 167907f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = InitializationKind::CreateCopy(Value->getLocStart(), 168007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getLocStart()); 168107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor InitializationSequence Seq(*this, Entity, Kind, &InitExpr, 1); 1682dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1683dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // [...] If overload resolution fails, or if the type of the first 1684cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // parameter of the selected constructor is not an rvalue reference 16850099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // to the object's type (possibly cv-qualified), overload resolution 1686cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // is performed again, considering the object as an lvalue. 1687383616cd2e61131a534afd9364ef53f643e1f834Sebastian Redl if (Seq) { 1688cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor for (InitializationSequence::step_iterator Step = Seq.step_begin(), 1689cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor StepEnd = Seq.step_end(); 1690cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Step != StepEnd; ++Step) { 1691383616cd2e61131a534afd9364ef53f643e1f834Sebastian Redl if (Step->Kind != InitializationSequence::SK_ConstructorInitialization) 1692cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor continue; 1693dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1694dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CXXConstructorDecl *Constructor 1695cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor = cast<CXXConstructorDecl>(Step->Function.Function); 1696dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1697cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor const RValueReferenceType *RRefType 169807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = Constructor->getParamDecl(0)->getType() 169907f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor ->getAs<RValueReferenceType>(); 1700dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1701cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // If we don't meet the criteria, break out now. 1702dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!RRefType || 170307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor !Context.hasSameUnqualifiedType(RRefType->getPointeeType(), 170407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Context.getTypeDeclType(Constructor->getParent()))) 1705cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor break; 1706dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1707cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Promote "AsRvalue" to the heap, since we now need this 1708cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // expression node to persist. 170907f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value = ImplicitCastExpr::Create(Context, Value->getType(), 1710dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CK_LValueToRValue, Value, 0, 171107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor VK_XValue); 1712dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1713cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Complete type-checking the initialization of the return type 1714cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // using the constructor we found. 171507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = Seq.Perform(*this, Entity, Kind, MultiExprArg(&Value, 1)); 1716cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1717cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1718cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1719dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1720cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Either we didn't meet the criteria for treating an lvalue as an rvalue, 1721dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // above, or overload resolution failed. Either way, we need to try 1722cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // (again) now with the return value expression as written. 1723cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor if (Res.isInvalid()) 172407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = PerformCopyInitialization(Entity, SourceLocation(), Value); 1725dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1726cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor return Res; 1727cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor} 1728cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor 172927c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 17304eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 173160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 17324eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 17334eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 17344eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 17359ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor BlockScopeInfo *CurBlock = getCurBlock(); 17367d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CurBlock->ReturnType.isNull()) { 1737c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 173816564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 173916564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 1740429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(RetValExp); 1741429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1742429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1743429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley RetValExp = Result.take(); 17446a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor 17456a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor if (!RetValExp->isTypeDependent()) { 17466a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor CurBlock->ReturnType = RetValExp->getType(); 17476a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(RetValExp)) { 17486a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor // We have to remove a 'const' added to copied-in variable which was 17496a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor // part of the implementation spec. and not the actual qualifier for 17506a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor // the variable. 17516a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor if (CDRE->isConstQualAdded()) 17526a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor CurBlock->ReturnType.removeLocalConst(); // FIXME: local??? 17536a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor } 17546a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor } else 17556a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor CurBlock->ReturnType = Context.DependentTy; 1756c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 17577d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = Context.VoidTy; 17584eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 17597d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian QualType FnRetType = CurBlock->ReturnType; 17604cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1761711c52bb20d0c69063b52a99826fb7d2835501f1John McCall if (CurBlock->FunctionType->getAs<FunctionType>()->getNoReturnAttr()) { 17626c92fa75e62937f9738696840efcb258560f4568Mike Stump Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr) 17636c92fa75e62937f9738696840efcb258560f4568Mike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 17646c92fa75e62937f9738696840efcb258560f4568Mike Stump return StmtError(); 17656c92fa75e62937f9738696840efcb258560f4568Mike Stump } 17666c92fa75e62937f9738696840efcb258560f4568Mike Stump 17674eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 17684eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 17694eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 1770d963c37eb912342c8325048749e449861cf0a6e3John McCall const VarDecl *NRVOCandidate = 0; 17710a7efe1142d241678c91bf93ee6adb51289863a4John McCall if (FnRetType->isDependentType()) { 17720a7efe1142d241678c91bf93ee6adb51289863a4John McCall // Delay processing for now. TODO: there are lots of dependent 17730a7efe1142d241678c91bf93ee6adb51289863a4John McCall // types we can conclusively prove aren't void. 17740a7efe1142d241678c91bf93ee6adb51289863a4John McCall } else if (FnRetType->isVoidType()) { 17750a7efe1142d241678c91bf93ee6adb51289863a4John McCall if (RetValExp && 17760a7efe1142d241678c91bf93ee6adb51289863a4John McCall !(getLangOptions().CPlusPlus && 17770a7efe1142d241678c91bf93ee6adb51289863a4John McCall (RetValExp->isTypeDependent() || 17780a7efe1142d241678c91bf93ee6adb51289863a4John McCall RetValExp->getType()->isVoidType()))) { 17794eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 17804eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 17814eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 17825077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp) { 17830a7efe1142d241678c91bf93ee6adb51289863a4John McCall return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 17840a7efe1142d241678c91bf93ee6adb51289863a4John McCall } else if (!RetValExp->isTypeDependent()) { 17850a7efe1142d241678c91bf93ee6adb51289863a4John McCall // we have a non-void block with an expression, continue checking 17860a7efe1142d241678c91bf93ee6adb51289863a4John McCall 17870a7efe1142d241678c91bf93ee6adb51289863a4John McCall // C99 6.8.6.4p3(136): The return statement is not an assignment. The 17880a7efe1142d241678c91bf93ee6adb51289863a4John McCall // overlap restriction of subclause 6.5.16.1 does not apply to the case of 17890a7efe1142d241678c91bf93ee6adb51289863a4John McCall // function return. 17900a7efe1142d241678c91bf93ee6adb51289863a4John McCall 17910a7efe1142d241678c91bf93ee6adb51289863a4John McCall // In C++ the return statement is handled via a copy initialization. 17920a7efe1142d241678c91bf93ee6adb51289863a4John McCall // the C version of which boils down to CheckSingleAssignmentConstraints. 17930a7efe1142d241678c91bf93ee6adb51289863a4John McCall NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 17940a7efe1142d241678c91bf93ee6adb51289863a4John McCall InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 17950a7efe1142d241678c91bf93ee6adb51289863a4John McCall FnRetType, 179607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor NRVOCandidate != 0); 17970a7efe1142d241678c91bf93ee6adb51289863a4John McCall ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 17980a7efe1142d241678c91bf93ee6adb51289863a4John McCall FnRetType, RetValExp); 17990a7efe1142d241678c91bf93ee6adb51289863a4John McCall if (Res.isInvalid()) { 18000a7efe1142d241678c91bf93ee6adb51289863a4John McCall // FIXME: Cleanup temporaries here, anyway? 18010a7efe1142d241678c91bf93ee6adb51289863a4John McCall return StmtError(); 1802c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson } 18030a7efe1142d241678c91bf93ee6adb51289863a4John McCall RetValExp = Res.take(); 18040a7efe1142d241678c91bf93ee6adb51289863a4John McCall CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 1805d963c37eb912342c8325048749e449861cf0a6e3John McCall } 1806dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1807d963c37eb912342c8325048749e449861cf0a6e3John McCall if (RetValExp) { 1808d963c37eb912342c8325048749e449861cf0a6e3John McCall CheckImplicitConversions(RetValExp, ReturnLoc); 1809d963c37eb912342c8325048749e449861cf0a6e3John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 181098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 18110a7efe1142d241678c91bf93ee6adb51289863a4John McCall ReturnStmt *Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 18120a7efe1142d241678c91bf93ee6adb51289863a4John McCall NRVOCandidate); 18134cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1814dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 18155077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 18166a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 18175077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 18185077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1819dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 18205077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 18214eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 18225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 182360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 18249ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 1825fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor // Check for unexpanded parameter packs. 1826fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor if (RetValExp && DiagnoseUnexpandedParameterPack(RetValExp)) 1827fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor return StmtError(); 1828fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor 18299ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor if (getCurBlock()) 18304eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 18314cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1832371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 1833926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor QualType DeclaredRetType; 1834f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 1835371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 1836926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor DeclaredRetType = FnRetType; 183704a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall if (FD->hasAttr<NoReturnAttr>() || 183804a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall FD->getType()->getAs<FunctionType>()->getNoReturnAttr()) 18398662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 1840f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 1841926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else if (ObjCMethodDecl *MD = getCurMethodDecl()) { 1842926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor DeclaredRetType = MD->getResultType(); 1843926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor if (MD->hasRelatedResultType() && MD->getClassInterface()) { 1844926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // In the implementation of a method with a related return type, the 1845926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // type used to type-check the validity of return statements within the 1846926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // method body is a pointer to the type of the class being implemented. 1847926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor FnRetType = Context.getObjCInterfaceType(MD->getClassInterface()); 1848926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor FnRetType = Context.getObjCObjectPointerType(FnRetType); 1849926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else { 1850926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor FnRetType = DeclaredRetType; 1851926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } 1852926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else // If we don't have a function/method context, bail. 1853c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 18541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18555077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 18565cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 18578d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (RetValExp) { 18588d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (!RetValExp->isTypeDependent()) { 18598d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky // C99 6.8.6.4p1 (ext_ since GCC warns) 18608d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky unsigned D = diag::ext_return_has_expr; 18618d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (RetValExp->getType()->isVoidType()) 18628d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky D = diag::ext_return_has_void_expr; 18638d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky else { 18648d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky ExprResult Result = Owned(RetValExp); 18658d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Result = IgnoredValueConversions(Result.take()); 18668d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (Result.isInvalid()) 18678d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky return StmtError(); 18688d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky RetValExp = Result.take(); 18698d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky RetValExp = ImpCastExprToType(RetValExp, 18708d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Context.VoidTy, CK_ToVoid).take(); 18718d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky } 18724cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 18738d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky // return (some void expression); is legal in C++. 18748d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (D != diag::ext_return_has_void_expr || 18758d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky !getLangOptions().CPlusPlus) { 18768d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 1877ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth 1878ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth int FunctionKind = 0; 1879ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth if (isa<ObjCMethodDecl>(CurDecl)) 1880ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 1; 1881ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth else if (isa<CXXConstructorDecl>(CurDecl)) 1882ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 2; 1883ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth else if (isa<CXXDestructorDecl>(CurDecl)) 1884ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 3; 1885ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth 18868d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Diag(ReturnLoc, D) 1887ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth << CurDecl->getDeclName() << FunctionKind 18888d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky << RetValExp->getSourceRange(); 18898d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky } 1890e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 18911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1892b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 18934765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 18945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1895dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 18965077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 18975077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp && !FnRetType->isDependentType()) { 18983c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 18993c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 19003c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 19013c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 19023c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 190308631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 19043c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 190508631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 19065077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc); 19075077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 19085077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 19095077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 19105077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void function with an expression, continue checking 19115077c3876beeaed32280af88244e8050078619a8Douglas Gregor 19125077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 19135077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 19145077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 19155077c3876beeaed32280af88244e8050078619a8Douglas Gregor 1916856d3798af7c2f7251e4a295f3da7a09ce4c62abJohn McCall // In C++ the return statement is handled via a copy initialization, 19175077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 1918f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 1919dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 192007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 192158f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet NRVOCandidate != 0); 1922dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 192307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 19245077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 19255077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 19265077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 19275077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 19284cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 19295077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 1930dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 19315077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 193266724ea67d7d598b937d86fa66f03f09a1c758f3Douglas Gregor } 1933dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1934b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1935926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // If we type-checked an Objective-C method's return type based 1936926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // on a related return type, we may need to adjust the return 1937926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // type again. Do so now. 1938926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor if (DeclaredRetType != FnRetType) { 1939926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor ExprResult result = PerformImplicitConversion(RetValExp, 1940926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor DeclaredRetType, 1941926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor AA_Returning); 1942926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor if (result.isInvalid()) return StmtError(); 1943926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor RetValExp = result.take(); 1944926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } 1945926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor 1946b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 19474765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1948b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 19495077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 1950898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 1951dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1952dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 19535077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 19545077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 19555077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 19565077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1957f85e193739c953358c865005855253af4f68a497John McCall 19585077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 19595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 19605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1961810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 1962810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 1963810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 1964810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 1965810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 1966810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 1967810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 1968810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 1969703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson // Type dependent expressions will be checked during instantiation. 1970703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson if (E->isTypeDependent()) 1971703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson return false; 1972dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 19737eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E->isLValue()) 1974810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 1975810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1976810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 1977810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 1978810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 19797eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E != E2 && E2->isLValue()) { 1980810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (!S.getLangOptions().HeinousExtensions) 1981810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 1982810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1983810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 1984810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 1985810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1986810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 1987810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 1988810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 1989810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1990810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 1991810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 1992810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 1993810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1994ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// isOperandMentioned - Return true if the specified operand # is mentioned 1995ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// anywhere in the decomposed asm string. 1996ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattnerstatic bool isOperandMentioned(unsigned OpNo, 19972d3ba4f5a923a90c3fc290ddfba5e36c2d0a9b46Chris Lattner ArrayRef<AsmStmt::AsmStringPiece> AsmStrPieces) { 1998ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner for (unsigned p = 0, e = AsmStrPieces.size(); p != e; ++p) { 1999ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner const AsmStmt::AsmStringPiece &Piece = AsmStrPieces[p]; 2000ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (!Piece.isOperand()) continue; 2001ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 2002ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 2003ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 2004ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (Piece.getOperandNo() == OpNo) 2005ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return true; 2006ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 2007ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 2008ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return false; 2009ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner} 2010810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 2011ca57b4b7658a031b74cda5ac504311998be8e343Chris LattnerStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, bool IsSimple, 2012ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner bool IsVolatile, unsigned NumOutputs, 2013ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner unsigned NumInputs, IdentifierInfo **Names, 2014ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner MultiExprArg constraints, MultiExprArg exprs, 2015ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner Expr *asmString, MultiExprArg clobbers, 2016ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner SourceLocation RParenLoc, bool MSAsm) { 20173037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 20183037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 20193037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 20209ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr **Exprs = exprs.get(); 20219ae2f076ca5ab1feb3ba95629099ec2319833701John McCall StringLiteral *AsmString = cast<StringLiteral>(asmString); 20223037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 20233037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 20245f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 20251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20261708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 20275cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!AsmString->isAscii()) 20283037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 20293037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 20303037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 20311708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 20321708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 20335cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 20343037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 20353037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 20363037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 20375f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef OutputName; 2038ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 2039ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson OutputName = Names[i]->getName(); 2040ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 2041ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 2042bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (!Context.getTargetInfo().validateOutputConstraint(Info)) 20433037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 2044432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 2045432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 20463037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2047d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 204872056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 2049810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 205072056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 2051dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 205272056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 205304728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 20541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 205544def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 205604728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 20573037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 20585f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 2059806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 206004728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 20611708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 20625cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 20633037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 20643037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 20653037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 20665f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef InputName; 2067ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 2068ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson InputName = Names[i]->getName(); 2069ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 2070ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 2071bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (!Context.getTargetInfo().validateInputConstraint(OutputConstraintInfos.data(), 20722819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 20733037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 2074432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 2075432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 2076d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 20773037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 207872056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 20793037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2080d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 208144def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 2082810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 208372056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 2084d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 2085432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 208672056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 208704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 20883037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 208944def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 2090d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 209172056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 2092d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 20931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump << InputExpr->getType() << Info.getConstraintStr() 209472056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 2095d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 2096d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 20971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2098429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(Exprs[i]); 2099429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2100429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 21011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2102429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Exprs[i] = Result.take(); 2103806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 210404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 21053037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 21066fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 21071708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 21081708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 21095cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 21103037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 21113037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 21123037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 21135f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Clobber = Literal->getString(); 21143037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2115bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor if (!Context.getTargetInfo().isValidClobber(Clobber)) 21163037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 21177765934ad7e157b5fcf925792a38e01b1edbcf8aDaniel Dunbar diag::err_asm_unknown_register_name) << Clobber); 21186fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 21193037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2120fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 2121dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm, 2122dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NumOutputs, NumInputs, Names, Constraints, Exprs, 2123966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson AsmString, NumClobbers, Clobbers, RParenLoc); 2124fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 2125fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 21265f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 2127fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 2128fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 21292ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 21302ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 2131fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 2132fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 21331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2134806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 2135806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 2136806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 21371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2138806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 2139806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 2140806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 2141806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 21421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2143806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 2144935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner unsigned InputOpNo = i+NumOutputs; 2145f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 2146935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Expr *InputExpr = Exprs[InputOpNo]; 2147f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman 2148f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman if (OutputExpr->isTypeDependent() || InputExpr->isTypeDependent()) 2149f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman continue; 2150f45b357c0d0df99e160a6320e279ef788dd91ba6Eli Friedman 21517adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 21527adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 21537adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 2154806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 21551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2156aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // Decide if the input and output are in the same domain (integer/ptr or 2157aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // floating point. 2158aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner enum AsmDomain { 2159aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner AD_Int, AD_FP, AD_Other 2160aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner } InputDomain, OutputDomain; 2161dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2162aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (InTy->isIntegerType() || InTy->isPointerType()) 2163aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Int; 21640c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (InTy->isRealFloatingType()) 2165aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_FP; 2166aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 2167aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Other; 21683351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 2169aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutTy->isIntegerType() || OutTy->isPointerType()) 2170aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Int; 21710c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (OutTy->isRealFloatingType()) 2172aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_FP; 2173aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 2174aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Other; 2175dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2176aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // They are ok if they are the same size and in the same domain. This 2177aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // allows tying things like: 2178aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int* 2179aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int if they are the same size. 2180aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // double to long double if they are the same size. 2181dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // 2182aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 2183aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 2184aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutSize == InSize && InputDomain == OutputDomain && 2185aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain != AD_Other) 2186aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 2187dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2188aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 2189f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // then we can promote the smaller one to a larger input and the asm string 2190f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // won't notice. 2191aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner bool SmallerValueMentioned = false; 2192ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 2193ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 2194ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 2195935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (isOperandMentioned(InputOpNo, Pieces)) { 2196ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // This is a use in the asm string of the smaller operand. Since we 2197ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // codegen this by promoting to a wider value, the asm will get printed 2198ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // "wrong". 2199f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= InSize < OutSize; 2200ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 2201f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner if (isOperandMentioned(TiedTo, Pieces)) { 2202ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the output, and if the output is the larger 2203ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // value, then it's ok because we'll promote the input to the larger type. 2204f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= OutSize < InSize; 2205806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 22061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2207aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 2208aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // output was a register, just extend the shorter one to the size of the 2209aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // larger one. 2210aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (!SmallerValueMentioned && InputDomain != AD_Other && 2211aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 2212aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 2213f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner 2214935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // Either both of the operands were mentioned or the smaller one was 2215935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // mentioned. One more special case that we'll allow: if the tied input is 2216935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // integer, unmentioned, and is a constant, then we'll allow truncating it 2217935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // down to the size of the destination. 2218935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (InputDomain == AD_Int && OutputDomain == AD_Int && 2219935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner !isOperandMentioned(InputOpNo, Pieces) && 2220935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner InputExpr->isEvaluatable(Context)) { 22214da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall CastKind castKind = 22224da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall (OutTy->isBooleanType() ? CK_IntegralToBoolean : CK_IntegralCast); 22234da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall InputExpr = ImpCastExprToType(InputExpr, OutTy, castKind).take(); 2224935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Exprs[InputOpNo] = InputExpr; 2225935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner NS->setInputExpr(i, InputExpr); 2226935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner continue; 2227935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner } 2228935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner 2229c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 2230806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 22317adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 2232806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 2233806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 2234806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 22351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2236fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 2237fe795956194141c91ae555985c9b930595bff43fChris Lattner} 22383b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 223960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2240431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 2241d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall SourceLocation RParen, Decl *Parm, 22429ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *Body) { 2243d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall VarDecl *Var = cast_or_null<VarDecl>(Parm); 2244160b5630aa781ac348303e1ae088d27016637778Douglas Gregor if (Var && Var->isInvalidDecl()) 2245160b5630aa781ac348303e1ae088d27016637778Douglas Gregor return StmtError(); 2246dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 22479ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtCatchStmt(AtLoc, RParen, Var, Body)); 22483b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 22493b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 225060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 22519ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body) { 22529ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, Body)); 2253161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 2254bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 225560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2256dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 22579ae2f076ca5ab1feb3ba95629099ec2319833701John McCall MultiStmtArg CatchStmts, Stmt *Finally) { 2258da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson if (!getLangOptions().ObjCExceptions) 2259da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@try"; 2260da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 2261781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 22628f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor unsigned NumCatchStmts = CatchStmts.size(); 22639ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(ObjCAtTryStmt::Create(Context, AtLoc, Try, 22649ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CatchStmts.release(), 22658f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor NumCatchStmts, 22669ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Finally)); 2267bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 2268bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 226960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::BuildObjCAtThrowStmt(SourceLocation AtLoc, 22709ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Throw) { 2271d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (Throw) { 2272f2dd68fb37a62571a4985c8dd05310ac90d07ef0Fariborz Jahanian Throw = MaybeCreateExprWithCleanups(Throw); 2273429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultLvalueConversion(Throw); 2274429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2275429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 22765e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 2277429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Throw = Result.take(); 2278d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor QualType ThrowType = Throw->getType(); 2279d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor // Make sure the expression type is an ObjC pointer or "void *". 2280d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!ThrowType->isDependentType() && 2281d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor !ThrowType->isObjCObjectPointerType()) { 2282d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor const PointerType *PT = ThrowType->getAs<PointerType>(); 2283d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!PT || !PT->getPointeeType()->isVoidType()) 2284d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 2285d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor << Throw->getType() << Throw->getSourceRange()); 2286d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 2287d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 2288dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 22899ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtThrowStmt(AtLoc, Throw)); 2290d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor} 2291d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor 229260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2293dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2294d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor Scope *CurScope) { 2295da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson if (!getLangOptions().ObjCExceptions) 2296da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@throw"; 2297da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 22989ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Throw) { 2299e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 2300e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 2301e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 2302e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 2303e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 2304e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 23054ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 2306dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 2307f2dd68fb37a62571a4985c8dd05310ac90d07ef0Fariborz Jahanian 23089ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return BuildObjCAtThrowStmt(AtLoc, Throw); 230939f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 2310bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 231107524039dce5c820f111a1b3f772b4261f004b4aJohn McCallExprResult 231207524039dce5c820f111a1b3f772b4261f004b4aJohn McCallSema::ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, Expr *operand) { 231307524039dce5c820f111a1b3f772b4261f004b4aJohn McCall ExprResult result = DefaultLvalueConversion(operand); 231407524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (result.isInvalid()) 231507524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return ExprError(); 231607524039dce5c820f111a1b3f772b4261f004b4aJohn McCall operand = result.take(); 23175e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 2318a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 231907524039dce5c820f111a1b3f772b4261f004b4aJohn McCall QualType type = operand->getType(); 232007524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (!type->isDependentType() && 232107524039dce5c820f111a1b3f772b4261f004b4aJohn McCall !type->isObjCObjectPointerType()) { 232207524039dce5c820f111a1b3f772b4261f004b4aJohn McCall const PointerType *pointerType = type->getAs<PointerType>(); 232307524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (!pointerType || !pointerType->getPointeeType()->isVoidType()) 232407524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return Diag(atLoc, diag::error_objc_synchronized_expects_object) 232507524039dce5c820f111a1b3f772b4261f004b4aJohn McCall << type << operand->getSourceRange(); 2326a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 23271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 232807524039dce5c820f111a1b3f772b4261f004b4aJohn McCall // The operand to @synchronized is a full-expression. 232907524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return MaybeCreateExprWithCleanups(operand); 233007524039dce5c820f111a1b3f772b4261f004b4aJohn McCall} 233107524039dce5c820f111a1b3f772b4261f004b4aJohn McCall 233207524039dce5c820f111a1b3f772b4261f004b4aJohn McCallStmtResult 233307524039dce5c820f111a1b3f772b4261f004b4aJohn McCallSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, Expr *SyncExpr, 233407524039dce5c820f111a1b3f772b4261f004b4aJohn McCall Stmt *SyncBody) { 233507524039dce5c820f111a1b3f772b4261f004b4aJohn McCall // We can't jump into or indirect-jump out of a @synchronized block. 233607524039dce5c820f111a1b3f772b4261f004b4aJohn McCall getCurFunction()->setHasBranchProtectedScope(); 23379ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, SyncExpr, SyncBody)); 2338fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 23394b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 23404b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 23414b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 234260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2343d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, Decl *ExDecl, 23449ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *HandlerBlock) { 23454b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 23468189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 2347d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall cast_or_null<VarDecl>(ExDecl), 23489ae2f076ca5ab1feb3ba95629099ec2319833701John McCall HandlerBlock)); 23494b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 23508351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 2351f85e193739c953358c865005855253af4f68a497John McCallStmtResult 2352f85e193739c953358c865005855253af4f68a497John McCallSema::ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body) { 2353f85e193739c953358c865005855253af4f68a497John McCall getCurFunction()->setHasBranchProtectedScope(); 2354f85e193739c953358c865005855253af4f68a497John McCall return Owned(new (Context) ObjCAutoreleasePoolStmt(AtLoc, Body)); 2355f85e193739c953358c865005855253af4f68a497John McCall} 2356f85e193739c953358c865005855253af4f68a497John McCall 23573c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 23583c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 2359c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlclass TypeWithHandler { 2360c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType t; 2361c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *stmt; 2362c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlpublic: 2363c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler(const QualType &type, CXXCatchStmt *statement) 2364c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl : t(type), stmt(statement) {} 2365c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 23660953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // An arbitrary order is fine as long as it places identical 23670953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // types next to each other. 2368c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator<(const TypeWithHandler &y) const { 23690953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() < y.t.getAsOpaquePtr()) 2370c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return true; 23710953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() > y.t.getAsOpaquePtr()) 2372c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return false; 2373c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl else 2374c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return getTypeSpecStartLoc() < y.getTypeSpecStartLoc(); 2375c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 23761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2377c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator==(const TypeWithHandler& other) const { 23780953e767ff7817f97b3ab20896b229891eeff45bJohn McCall return t == other.t; 2379c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 23801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2381c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *getCatchStmt() const { return stmt; } 2382c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl SourceLocation getTypeSpecStartLoc() const { 2383c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return stmt->getExceptionDecl()->getTypeSpecStartLoc(); 2384c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 2385c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl}; 2386c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 23873c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 23883c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 23898351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 23908351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 239160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 23929ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 23938351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 2394729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson // Don't report an error if 'try' is used in system headers. 239515348aeb81285c75b2e92b5bf8d2db3445d147c2Anders Carlsson if (!getLangOptions().CXXExceptions && 2396729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson !getSourceManager().isInSystemHeader(TryLoc)) 2397729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson Diag(TryLoc, diag::err_exceptions_disabled) << "try"; 23987f11d9cf5df1f8ce82af46eabc4ec5cec7d580b0Anders Carlsson 23998351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 24008351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 24018351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 24029ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt **Handlers = RawHandlers.get(); 24038351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 24045f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TypeWithHandler, 8> TypesWithHandlers; 24051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (unsigned i = 0; i < NumHandlers; ++i) { 24075f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner CXXCatchStmt *Handler = cast<CXXCatchStmt>(Handlers[i]); 2408c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (!Handler->getExceptionDecl()) { 2409c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (i < NumHandlers - 1) 2410c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return StmtError(Diag(Handler->getLocStart(), 2411c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::err_early_catch_all)); 24121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2413c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl continue; 2414c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 24151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2416c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CaughtType = Handler->getCaughtType(); 2417c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CanonicalCaughtType = Context.getCanonicalType(CaughtType); 2418c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypesWithHandlers.push_back(TypeWithHandler(CanonicalCaughtType, Handler)); 2419c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 2420c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 2421c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl // Detect handlers for the same type as an earlier one. 2422c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (NumHandlers > 1) { 2423c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::array_pod_sort(TypesWithHandlers.begin(), TypesWithHandlers.end()); 24241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2425c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler prev = TypesWithHandlers[0]; 2426c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl for (unsigned i = 1; i < TypesWithHandlers.size(); ++i) { 2427c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler curr = TypesWithHandlers[i]; 24281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2429c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (curr == prev) { 2430c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(curr.getTypeSpecStartLoc(), 2431c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::warn_exception_caught_by_earlier_handler) 2432c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << curr.getCatchStmt()->getCaughtType().getAsString(); 2433c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(prev.getTypeSpecStartLoc(), 2434c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::note_previous_exception_handler) 2435c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << prev.getCatchStmt()->getCaughtType().getAsString(); 2436c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 24371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2438c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl prev = curr; 2439c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 24408351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 24411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2442781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 2443b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 24448351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 24458351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 24468351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 24478351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 24488351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 24498351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 24509ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(CXXTryStmt::Create(Context, TryLoc, TryBlock, 2451a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig Handlers, NumHandlers)); 24528351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 245328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 245428bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 245528bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHTryBlock(bool IsCXXTry, 245628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley SourceLocation TryLoc, 245728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *TryBlock, 245828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Handler) { 245928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(TryBlock && Handler); 246028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 246128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley getCurFunction()->setHasBranchProtectedScope(); 246228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 246328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHTryStmt::Create(Context,IsCXXTry,TryLoc,TryBlock,Handler)); 246428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 246528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 246628bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 246728bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHExceptBlock(SourceLocation Loc, 246828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Expr *FilterExpr, 246928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Block) { 247028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(FilterExpr && Block); 247128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 247228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley if(!FilterExpr->getType()->isIntegerType()) { 247358f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet return StmtError(Diag(FilterExpr->getExprLoc(), 247458f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet diag::err_filter_expression_integral) 247558f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet << FilterExpr->getType()); 247628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley } 247728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 247828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHExceptStmt::Create(Context,Loc,FilterExpr,Block)); 247928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 248028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 248128bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 248228bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHFinallyBlock(SourceLocation Loc, 248328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Block) { 248428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(Block); 248528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHFinallyStmt::Create(Context,Loc,Block)); 248628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 2487