SemaStmt.cpp revision 07524039dce5c820f111a1b3f772b4261f004b4a
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, 50b7d98d35ea723624345f06e5895ddce2e0388ef0Argyrios Kyrtzidis SourceLocation LeadingEmptyMacroLoc) { 51b7d98d35ea723624345f06e5895ddce2e0388ef0Argyrios Kyrtzidis return Owned(new (Context) NullStmt(SemiLoc, LeadingEmptyMacroLoc)); 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 95636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlssonvoid Sema::DiagnoseUnusedExprResult(const Stmt *S) { 96d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis if (const LabelStmt *Label = dyn_cast_or_null<LabelStmt>(S)) 97d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis return DiagnoseUnusedExprResult(Label->getSubStmt()); 98d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis 99754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson const Expr *E = dyn_cast_or_null<Expr>(S); 100636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (!E) 101636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 102636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 103636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceLocation Loc; 104636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceRange R1, R2; 105df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (!E->isUnusedResultAWarning(Loc, R1, R2, Context)) 106636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 1071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 108419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // Okay, we have an unused result. Depending on what the base expression is, 109419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // we might want to make a more specific diagnostic. Check for one of these 110419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // cases now. 111419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner unsigned DiagID = diag::warn_unused_expr; 1124765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall if (const ExprWithCleanups *Temps = dyn_cast<ExprWithCleanups>(E)) 1134dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor E = Temps->getSubExpr(); 11434d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth if (const CXXBindTemporaryExpr *TempExpr = dyn_cast<CXXBindTemporaryExpr>(E)) 11534d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth E = TempExpr->getSubExpr(); 11612f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall 117f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall E = E->IgnoreParenImpCasts(); 118bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { 1190faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall if (E->getType()->isVoidType()) 1200faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall return; 1210faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall 122bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // If the callee has attribute pure, const, or warn_unused_result, warn with 123bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // a more specific message to make it clear what is happening. 124d20254f2875d0004c57ee766f258dbcee29f4841Nuno Lopes if (const Decl *FD = CE->getCalleeDecl()) { 125bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<WarnUnusedResultAttr>()) { 126bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "warn_unused_result"; 127bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 128bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 129bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<PureAttr>()) { 130bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "pure"; 131bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 132bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 133bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<ConstAttr>()) { 134bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "const"; 135bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 136bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 137dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 13812f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (const ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(E)) { 139f85e193739c953358c865005855253af4f68a497John McCall if (getLangOptions().ObjCAutoRefCount && ME->isDelegateInitCall()) { 140f85e193739c953358c865005855253af4f68a497John McCall Diag(Loc, diag::err_arc_unused_init_message) << R1; 141f85e193739c953358c865005855253af4f68a497John McCall return; 142f85e193739c953358c865005855253af4f68a497John McCall } 143f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian const ObjCMethodDecl *MD = ME->getMethodDecl(); 144f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian if (MD && MD->getAttr<WarnUnusedResultAttr>()) { 145f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian Diag(Loc, diag::warn_unused_call) << R1 << R2 << "warn_unused_result"; 146f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian return; 147f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 14812f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (isa<ObjCPropertyRefExpr>(E)) { 14912f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall DiagID = diag::warn_unused_property_expr; 150d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor } else if (const CXXFunctionalCastExpr *FC 151d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor = dyn_cast<CXXFunctionalCastExpr>(E)) { 152d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor if (isa<CXXConstructExpr>(FC->getSubExpr()) || 153d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor isa<CXXTemporaryObjectExpr>(FC->getSubExpr())) 154d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor return; 155f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 156209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // Diagnose "(void*) blah" as a typo for "(void) blah". 157209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall else if (const CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(E)) { 158209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall TypeSourceInfo *TI = CE->getTypeInfoAsWritten(); 159209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall QualType T = TI->getType(); 160209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 161209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // We really do want to use the non-canonical type here. 162209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall if (T == Context.VoidPtrTy) { 163209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall PointerTypeLoc TL = cast<PointerTypeLoc>(TI->getTypeLoc()); 164209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 165209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall Diag(Loc, diag::warn_unused_voidptr) 166209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall << FixItHint::CreateRemoval(TL.getStarLoc()); 167209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall return; 168209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 169209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 170209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 171351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek DiagRuntimeBehavior(Loc, 0, PDiag(DiagID) << R1 << R2); 172636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson} 173636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 17460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1751b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 176a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 177a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 178a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 179c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 180c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 181c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus) { 182c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 183c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 184c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 185c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 186c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 187c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 188c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 189c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 190c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 1911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 192c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 1934afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 194c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 195c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 196c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 19798414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 19898414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 199636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson // Ignore statements that are last in a statement expression. 200636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (isStmtExpr && i == NumElts - 1) 20198414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 2021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 203636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson DiagnoseUnusedExprResult(Elts[i]); 20498414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 205a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 2068189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 20960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2109ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2119ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation DotDotDotLoc, Expr *RHSVal, 21224e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 2139ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert((LHSVal != 0) && "missing expression in case statement"); 214117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.4.2p3: The expression shall be an integer constant. 2161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // However, GCC allows any evaluatable integer expression. 2171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!LHSVal->isTypeDependent() && !LHSVal->isValueDependent() && 218dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(LHSVal)) 21924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2216c36be5b383875b490684bcf439d6d427298c1afChris Lattner // GCC extension: The expression shall be an integer constant. 222117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 223dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (RHSVal && !RHSVal->isTypeDependent() && !RHSVal->isValueDependent() && 224dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(RHSVal)) { 225f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner RHSVal = 0; // Recover by just forgetting about it. 226117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl } 227117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 228781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 2298a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner Diag(CaseLoc, diag::err_case_not_in_switch); 23024e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 2318a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 233dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc, DotDotDotLoc, 234dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ColonLoc); 235781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(CS); 236117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 23924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 2409ae2f076ca5ab1feb3ba95629099ec2319833701John McCallvoid Sema::ActOnCaseStmtBody(Stmt *caseStmt, Stmt *SubStmt) { 24124e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 24224e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 24324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 24424e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 24560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2461eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 2479ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SubStmt, Scope *CurScope) { 248781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 2490fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 250117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 2510fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 252117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 253dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, ColonLoc, SubStmt); 254781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(DS); 255117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 25860d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 25957ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerSema::ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 26057ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation ColonLoc, Stmt *SubStmt) { 26157ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner 262ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // If the label was multiply defined, reject it now. 263ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner if (TheDecl->getStmt()) { 264ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << TheDecl->getDeclName(); 265ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(TheDecl->getLocation(), diag::note_previous_definition); 266de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 2675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 268de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 269ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // Otherwise, things are good. Fill in the declaration and return it. 270ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner LabelStmt *LS = new (Context) LabelStmt(IdentLoc, TheDecl, SubStmt); 271ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setStmt(LS); 272203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara if (!TheDecl->isGnuLocal()) 273203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara TheDecl->setLocation(IdentLoc); 274ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(LS); 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 27760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 278d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, Decl *CondVar, 27944aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *thenStmt, SourceLocation ElseLoc, 28044aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *elseStmt) { 28160d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(CondVal.release()); 2821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2838cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor VarDecl *ConditionVar = 0; 284d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 285d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 286586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, IfLoc, true); 28799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 28899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 2898cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor } 29099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 29199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 29299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 293dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 294754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(thenStmt); 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2962d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 2972d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 2982d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 2992d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 300b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek // 3019ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!elseStmt) { 3022d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 303a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // But do not warn if the body is a macro that expands to nothing, e.g: 304a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 305a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // #define CALL(x) 306a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // if (condition) 307a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // CALL(0); 308a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 30944aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis if (!stmt->hasLeadingEmptyMacro()) 310b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 3112d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 3122d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 313754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(elseStmt); 3141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 315dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) IfStmt(Context, IfLoc, ConditionVar, ConditionExpr, 31644aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis thenStmt, ElseLoc, elseStmt)); 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 319f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 320f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 321f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 322f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 323f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 3241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, 325f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 326f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 327f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 328f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 3299f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(NewWidth); 330f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 331f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor 332f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // If the input was signed and negative and the output is 333f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // unsigned, don't bother to warn: this is implementation-defined 334f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // behavior. 335f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 336f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 337f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 338f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 3399f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.trunc(NewWidth); 340b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 3419f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.extend(Val.getBitWidth()); 342b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 343f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 344d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 3451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 346f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 347f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 3489f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(NewWidth); 349b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 350f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 351f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 352f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 353dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // We don't diagnose this overflow, because it is implementation-defined 3542853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // behavior. 3552853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 356f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 357f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 358f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 359f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 360f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3610471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3620471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3630471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3640471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3650471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3660471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3670e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3680e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3690e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3700e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3710471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3720471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3730471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3740471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3750471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3760471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3770471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 378764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 379764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 380764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 381764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 382764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 383764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 384764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 385764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 386764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 387764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 388764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 389764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 390764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 391764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 392ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// CmpEnumVals - Comparison predicate for sorting enumeration values. 393ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 394ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool CmpEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 395ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 396ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 397ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first < rhs.first; 398ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 399ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 400ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// EqEnumVals - Comparison preficate for uniqing enumeration values. 401ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 402ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool EqEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 403ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 404ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 405ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first == rhs.first; 406ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 407ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 4085f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// GetTypeBeforeIntegralPromotion - Returns the pre-promotion type of 4095f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// potentially integral-promoted expression @p expr. 4105f04881eb025f61396d0555d8173730fe2759e0aChris Lattnerstatic QualType GetTypeBeforeIntegralPromotion(const Expr* expr) { 4116907fbe758d23e1aec4c0a67e7b633d1d855feb4John McCall if (const CastExpr *ImplicitCast = dyn_cast<ImplicitCastExpr>(expr)) { 4125f04881eb025f61396d0555d8173730fe2759e0aChris Lattner const Expr *ExprBeforePromotion = ImplicitCast->getSubExpr(); 4135f04881eb025f61396d0555d8173730fe2759e0aChris Lattner QualType TypeBeforePromotion = ExprBeforePromotion->getType(); 4142ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (TypeBeforePromotion->isIntegralOrEnumerationType()) { 4155f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return TypeBeforePromotion; 4165f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 4175f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 4185f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return expr->getType(); 4195f04881eb025f61396d0555d8173730fe2759e0aChris Lattner} 4205f04881eb025f61396d0555d8173730fe2759e0aChris Lattner 42160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 422dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, Expr *Cond, 423d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall Decl *CondVar) { 42460d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult; 4259ae2f076ca5ab1feb3ba95629099ec2319833701John McCall 426586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor VarDecl *ConditionVar = 0; 427d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 428d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 4299ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult = CheckConditionVariable(ConditionVar, SourceLocation(), false); 4309ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 431586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 432dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4339ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.release(); 434586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 435dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4369ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Cond) 437586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 438dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4399ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult 440dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = ConvertToIntegralOrEnumerationType(SwitchLoc, Cond, 441c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_typecheck_statement_requires_integer), 442c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_incomplete_class_type) 4439ae2f076ca5ab1feb3ba95629099ec2319833701John McCall << Cond->getSourceRange(), 444c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_explicit_conversion), 445c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::note_switch_conversion), 446c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_multiple_conversions), 4476bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(diag::note_switch_conversion), 4486bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(0)); 4499ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) return StmtError(); 4509ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 451dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 452d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (!CondVar) { 453b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, SwitchLoc); 4544765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall CondResult = MaybeCreateExprWithCleanups(Cond); 4559ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 456586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 4579ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 458586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 459b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 460781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchIntoScope(); 461dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4629ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = new (Context) SwitchStmt(Context, ConditionVar, Cond); 463781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.push_back(SS); 464586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return Owned(SS); 4657e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner} 4667e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner 46728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greifstatic void AdjustAPSInt(llvm::APSInt &Val, unsigned BitWidth, bool IsSigned) { 46828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif if (Val.getBitWidth() < BitWidth) 4699f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(BitWidth); 47028164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif else if (Val.getBitWidth() > BitWidth) 4719f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(BitWidth); 47228164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Val.setIsSigned(IsSigned); 47328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif} 47428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif 47560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 4769ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, Stmt *Switch, 4779ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *BodyStmt) { 4789ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = cast<SwitchStmt>(Switch); 479781472fe99a120098c631b0cbe33c89f8cef5e70John McCall assert(SS == getCurFunction()->SwitchStack.back() && 480781472fe99a120098c631b0cbe33c89f8cef5e70John McCall "switch stack missing push/pop!"); 481de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 4829dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 483781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.pop_back(); 484c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 485ff331c15729f7d4439d253c97f4d60f2a7ffd0c6Douglas Gregor if (SS->getCond() == 0) 486be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor return StmtError(); 487dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 488f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 4890fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr *CondExprBeforePromotion = CondExpr; 49084fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor QualType CondTypeBeforePromotion = 49184fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor GetTypeBeforeIntegralPromotion(CondExpr); 492de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 4930de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 494429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult CondResult = UsualUnaryConversions(CondExpr); 495429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (CondResult.isInvalid()) 496429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 497429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CondExpr = CondResult.take(); 498a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor QualType CondType = CondExpr->getType(); 49984fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor SS->setCond(CondExpr); 50084fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor 5015f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // C++ 6.4.2.p2: 5025f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // Integral promotions are performed (on the switch condition). 5035f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // 5045f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // A case value unrepresentable by the original switch condition 5055f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // type (before the promotion) doesn't make sense, even when it can 5065f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // be represented by the promoted type. Therefore we need to find 5075f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // the pre-promotion type of the switch condition. 50812356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondExpr->isTypeDependent()) { 509acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // We have already converted the expression to an integral or enumeration 510dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // type, when we started the switch statement. If we don't have an 511acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // appropriate type now, just return an error. 512acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor if (!CondType->isIntegralOrEnumerationType()) 51312356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan return StmtError(); 51412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan 5152b334bb3126a67895813e49e6228dad4aec0b4d6Chris Lattner if (CondExpr->isKnownToHaveBooleanValue()) { 51612356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(bool_expr) {...} is often a programmer error, e.g. 51712356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(n && mask) { ... } // Doh - should be "n & mask". 51812356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // One can always use an if statement instead of switch(bool_expr). 51912356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::warn_bool_switch_condition) 52012356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondExpr->getSourceRange(); 52112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 522c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 523de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 524f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 525f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 5261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HasDependentValue 527dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 5281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned CondWidth 5291d6ab7af99a1fc059a6aa5da083640c1d94b07f7Chris Lattner = HasDependentValue ? 0 : Context.getIntWidth(CondTypeBeforePromotion); 530575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool CondIsSigned 531575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor = CondTypeBeforePromotion->isSignedIntegerOrEnumerationType(); 5321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 533f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 534f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 535f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 5365f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner typedef SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 5370471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 5381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 539f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 540ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRangesTy; 541ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy CaseRanges; 5421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 543f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 5441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 545b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 5461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 547dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 548c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 5491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 550c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 551f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 552f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 5535f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 554de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 555f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 556390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 557390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 558390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 559b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 560c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 561f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 5621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 563f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 564f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 5651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 566f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 567f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 5681e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 569dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 570dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 571dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 572dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 573dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 5741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 57551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 5761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 577f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 578f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 57928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Lo->getLocStart(), 580f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 5816c36be5b383875b490684bcf439d6d427298c1afChris Lattner 5821e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 5831e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 584429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Lo = ImpCastExprToType(Lo, CondType, CK_IntegralCast).take(); 5851e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 5861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 587b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 588dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 5891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CS->getRHS()->isTypeDependent() || 590dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 591dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 592dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 593dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 594f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 5951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 596b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 597f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 598f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 599b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 600dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 6010fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // If we don't have a default statement, check whether the 6020fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // condition is constant. 6030fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt ConstantCondValue; 6040fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool HasConstantCond = false; 6050fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool ShouldCheckConstantCond = false; 6060fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!HasDependentValue && !TheDefaultStmt) { 6070fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr::EvalResult Result; 6080fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall HasConstantCond = CondExprBeforePromotion->Evaluate(Result, Context); 6090fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (HasConstantCond) { 6100fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(Result.Val.isInt() && "switch condition evaluated to non-int"); 6110fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue = Result.Val.getInt(); 6120fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = true; 6130fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6140fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(ConstantCondValue.getBitWidth() == CondWidth && 6150fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue.isSigned() == CondIsSigned); 6160fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 6170fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 6180fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 619dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 620dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 621dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 622dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 6230fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (unsigned i = 0, e = CaseVals.size(); i != e; ++i) { 6240fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 6250fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CaseVals[i].first == ConstantCondValue) 6260fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6270fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6280fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (i != 0 && CaseVals[i].first == CaseVals[i-1].first) { 629dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 6301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(CaseVals[i].second->getLHS()->getLocStart(), 6310fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall diag::err_duplicate_case) << CaseVals[i].first.toString(10); 6320fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CaseVals[i-1].second->getLHS()->getLocStart(), 633dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 634390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 635390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 636dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 637dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6386efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 639b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 6401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 641dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 642dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 643dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 644dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 645dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 646dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 6471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 648dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 649dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 650dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 6510fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt &LoVal = CaseRanges[i].first; 652dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 653dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 654dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 6551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 656dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 657dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 65828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocStart(), 659dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 6601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 661dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the LHS is not the same type as the condition, insert an implicit 662dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // cast. 663429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Hi = ImpCastExprToType(Hi, CondType, CK_IntegralCast).take(); 664dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 6651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 666dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 6670fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (LoVal > HiVal) { 668dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 669dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 67028164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocEnd()); 671dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 672dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 673dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 674dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6750fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6760fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 6770fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall LoVal <= ConstantCondValue && 6780fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue <= HiVal) 6790fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6800fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 681dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 6820471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 6831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 684dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 685dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 686dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 687dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 688dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 689dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 690dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 6911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 692dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 693dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 694dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 695dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 6961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 697dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 698dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 699dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 700dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 701dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 702dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 703dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 704dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 705dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 707dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 708dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 709dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 710dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 711dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 712dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 714dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 715dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 716dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 717dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 718dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 719dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 721dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 722dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 723dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 724dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 7251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(OverlapStmt->getLHS()->getLocStart(), 726dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 727390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 728390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 729dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 730dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7310471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 732b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 733ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7340fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Complain if we have a constant condition and we didn't find a match. 7350fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!CaseListIsErroneous && ShouldCheckConstantCond) { 7360fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // TODO: it would be nice if we printed enums as enums, chars as 7370fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // chars, etc. 7380fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CondExpr->getExprLoc(), diag::warn_missing_case_for_condition) 7390fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ConstantCondValue.toString(10) 7400fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << CondExpr->getSourceRange(); 7410fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 7420fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7430fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Check to see if switch is over an Enum and handles all of its 744559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // values. We only issue a warning if there is not 'default:', but 745559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // we still do the analysis to preserve this information in the AST 746559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // (which can be used by flow-based analyes). 7470fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // 748ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner const EnumType *ET = CondTypeBeforePromotion->getAs<EnumType>(); 749559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 750ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // If switch has default case, then ignore it. 751559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!CaseListIsErroneous && !HasConstantCond && ET) { 752ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const EnumDecl *ED = ET->getDecl(); 7535f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner typedef SmallVector<std::pair<llvm::APSInt, EnumConstantDecl*>, 64> 75458f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet EnumValsTy; 755ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy EnumVals; 756ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7570fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Gather all enum values, set their type and sort them, 7580fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // allowing easier comparison with CaseVals. 7590fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (EnumDecl::enumerator_iterator EDI = ED->enumerator_begin(); 76028164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EDI != ED->enumerator_end(); ++EDI) { 76128164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif llvm::APSInt Val = EDI->getInitVal(); 76228164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Val, CondWidth, CondIsSigned); 76328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EnumVals.push_back(std::make_pair(Val, *EDI)); 764ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 765ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor std::stable_sort(EnumVals.begin(), EnumVals.end(), CmpEnumVals); 7660fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall EnumValsTy::iterator EIend = 7670fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall std::unique(EnumVals.begin(), EnumVals.end(), EqEnumVals); 768559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 769559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // See which case values aren't in enum. 770559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // TODO: we might want to check whether case values are out of the 771559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // enum even if we don't want to check whether all cases are handled. 772559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!TheDefaultStmt) { 77347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EnumValsTy::const_iterator EI = EnumVals.begin(); 77447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseValsTy::const_iterator CI = CaseVals.begin(); 7750fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CI != CaseVals.end(); CI++) { 77647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < CI->first) 77747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 77847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first > CI->first) 7790fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 7800fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ED->getDeclName(); 78147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 78247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek // See which of case ranges aren't in enum 78347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI = EnumVals.begin(); 78447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseRangesTy::const_iterator RI = CaseRanges.begin(); 7850fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall RI != CaseRanges.end() && EI != EIend; RI++) { 78647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < RI->first) 78747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 788dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 78947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != RI->first) { 79047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 79147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 79247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 793e0ba9d1beeba01a96808c2fc61f9ca89acec313bTed Kremenek 79447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 79528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 79647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < Hi) 79747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 79847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != Hi) 79947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getRHS()->getExprLoc(), diag::warn_not_in_enum) 80047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 80147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 802ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 803dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 804559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Check which enum vals aren't in switch 805ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseValsTy::const_iterator CI = CaseVals.begin(); 806ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy::const_iterator RI = CaseRanges.begin(); 807559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek bool hasCasesNotInSwitch = false; 808559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 8095f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeclarationName,8> UnhandledNames; 810dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 811559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek for (EnumValsTy::const_iterator EI = EnumVals.begin(); EI != EIend; EI++){ 812ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Drop unneeded case values 813ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt CIVal; 814ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (CI != CaseVals.end() && CI->first < EI->first) 815ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CI++; 816dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 817ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (CI != CaseVals.end() && CI->first == EI->first) 818ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor continue; 819ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 820559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Drop unneeded case ranges 821ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (; RI != CaseRanges.end(); RI++) { 822ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 82328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 824ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI->first <= Hi) 825ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor break; 826ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 827ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 828559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (RI == CaseRanges.end() || EI->first < RI->first) { 82947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek hasCasesNotInSwitch = true; 83047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (!TheDefaultStmt) 831ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner UnhandledNames.push_back(EI->second->getDeclName()); 83247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 833ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 834dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 835ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Produce a nice diagnostic if multiple values aren't handled. 836ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner switch (UnhandledNames.size()) { 837ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 0: break; 838ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 1: 839ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case1) 840ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0]; 841ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 842ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 2: 843ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case2) 844ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1]; 845ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 846ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 3: 847ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case3) 848ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 849ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 850ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner default: 851ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_cases) 852ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << (unsigned)UnhandledNames.size() 853ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 854ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 855ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner } 856559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 857559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!hasCasesNotInSwitch) 85847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek SS->setAllEnumCasesCovered(); 859ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 860b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 861dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 862390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 863390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 864b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 865de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 866de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 867de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 8685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 87060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 871dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, 8729ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Decl *CondVar, Stmt *Body) { 87360d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(Cond.release()); 874dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8755656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor VarDecl *ConditionVar = 0; 876d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 877d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 878586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, WhileLoc, true); 87999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 88099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 8815656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor } 8829ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *ConditionExpr = CondResult.take(); 88399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 88499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 885dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8869ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 8871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 88843dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor return Owned(new (Context) WhileStmt(Context, ConditionVar, ConditionExpr, 8899ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Body, WhileLoc)); 8905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 89260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 8939ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 894989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 8959ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Cond, SourceLocation CondRParen) { 8969ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert(Cond && "ActOnDoStmt(): missing expression"); 897f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 898429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult CondResult = CheckBooleanCondition(Cond, DoLoc); 899429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (CondResult.isInvalid() || CondResult.isInvalid()) 9005a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 901429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Cond = CondResult.take(); 9025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 903b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, DoLoc); 904429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CondResult = MaybeCreateExprWithCleanups(Cond); 9059ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 906586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 9079ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 908dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9099ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 910754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 9119ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) DoStmt(Body, Cond, DoLoc, WhileLoc, CondRParen)); 9125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 91460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 915f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 9169ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, FullExprArg second, Decl *secondVar, 91799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor FullExprArg third, 9189ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 9195921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 9205921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 921f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 922f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 923f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 9245921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 9255921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 9265921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 927b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD && VD->isLocalVarDecl() && !VD->hasLocalStorage()) 9285921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 9295921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 9305921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 9315921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 9325921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 933ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 9345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 93599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 93660d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult SecondResult(second.release()); 93799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor VarDecl *ConditionVar = 0; 938d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (secondVar) { 939d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(secondVar); 940586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor SecondResult = CheckConditionVariable(ConditionVar, ForLoc, true); 94199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (SecondResult.isInvalid()) 94299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 94399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor } 944dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 94599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Third = third.release().takeAs<Expr>(); 946dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9473af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(First); 9483af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(Third); 949754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(Body); 950754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 951dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) ForStmt(Context, First, 952dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi SecondResult.take(), ConditionVar, 953dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Third, Body, ForLoc, LParenLoc, 95443dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor RParenLoc)); 9555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 957f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// In an Objective C collection iteration statement: 958f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// for (x in y) 959f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// x can be an arbitrary l-value expression. Bind it up as a 960f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// full-expression. 961f6a1648197562e0b133440d612d9af297d0a86ccJohn McCallStmtResult Sema::ActOnForEachLValueExpr(Expr *E) { 962f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall CheckImplicitConversions(E); 9634765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall ExprResult Result = MaybeCreateExprWithCleanups(E); 964f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall if (Result.isInvalid()) return StmtError(); 965f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall return Owned(static_cast<Stmt*>(Result.get())); 966f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall} 967f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall 968990567cb60e8530ba01b41d4e056e32b44b95ec0John McCallExprResult 969990567cb60e8530ba01b41d4e056e32b44b95ec0John McCallSema::ActOnObjCForCollectionOperand(SourceLocation forLoc, Expr *collection) { 970990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall assert(collection); 971990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 972990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Bail out early if we've got a type-dependent expression. 973990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (collection->isTypeDependent()) return Owned(collection); 974990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 975990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Perform normal l-value conversion. 976990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ExprResult result = DefaultFunctionArrayLvalueConversion(collection); 977990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (result.isInvalid()) 978990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return ExprError(); 979990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall collection = result.take(); 980990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 981990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // The operand needs to have object-pointer type. 982990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // TODO: should we do a contextual conversion? 983990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall const ObjCObjectPointerType *pointerType = 984990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall collection->getType()->getAs<ObjCObjectPointerType>(); 985990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!pointerType) 986990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return Diag(forLoc, diag::err_collection_expr_type) 987990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall << collection->getType() << collection->getSourceRange(); 988990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 989990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Check that the operand provides 990990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // - countByEnumeratingWithState:objects:count: 991990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall const ObjCObjectType *objectType = pointerType->getObjectType(); 992990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ObjCInterfaceDecl *iface = objectType->getInterface(); 993990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 994990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If we have a forward-declared type, we can't do this check. 995990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (iface && iface->isForwardDecl()) { 996990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // This is ill-formed under ARC. 997990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (getLangOptions().ObjCAutoRefCount) { 998990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Diag(forLoc, diag::err_arc_collection_forward) 999990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall << pointerType->getPointeeType() << collection->getSourceRange(); 1000990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1001990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1002990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Otherwise, if we have any useful type information, check that 1003990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // the type declares the appropriate method. 1004990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } else if (iface || !objectType->qual_empty()) { 1005990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall IdentifierInfo *selectorIdents[] = { 1006990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("countByEnumeratingWithState"), 1007990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("objects"), 1008990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall &Context.Idents.get("count") 1009990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall }; 1010990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Selector selector = Context.Selectors.getSelector(3, &selectorIdents[0]); 1011990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1012990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall ObjCMethodDecl *method = 0; 1013990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1014990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If there's an interface, look in both the public and private APIs. 1015990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (iface) { 1016990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall method = iface->lookupInstanceMethod(selector); 1017990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) method = LookupPrivateInstanceMethod(selector, iface); 1018990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1019990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1020990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Also check protocol qualifiers. 1021990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) 1022990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall method = LookupMethodInQualifiedType(selector, pointerType, 1023990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall /*instance*/ true); 1024990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1025990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // If we didn't find it anywhere, give up. 1026990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (!method) { 1027990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Diag(forLoc, diag::warn_collection_expr_type) 1028990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall << collection->getType() << selector << collection->getSourceRange(); 1029990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1030990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1031990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // TODO: check for an incompatible signature? 1032990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 1033990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1034990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Wrap up any cleanups in the expression. 1035990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return Owned(MaybeCreateExprWithCleanups(collection)); 1036990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall} 1037990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 103860d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1039f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 1040f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 10419ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, Expr *Second, 10429ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 104320552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 104420552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 104520552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 10467e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 1047f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 1048f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 1049f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 1050f85e193739c953358c865005855253af4f68a497John McCall VarDecl *D = cast<VarDecl>(DS->getSingleDecl()); 1051f85e193739c953358c865005855253af4f68a497John McCall FirstType = D->getType(); 1052f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 1053f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 1054f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 1055f85e193739c953358c865005855253af4f68a497John McCall if (!D->hasLocalStorage()) 1056f85e193739c953358c865005855253af4f68a497John McCall return StmtError(Diag(D->getLocation(), 1057f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 10581fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 1059c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor Expr *FirstE = cast<Expr>(First); 10607eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (!FirstE->isTypeDependent() && !FirstE->isLValue()) 1061f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 1062f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 1063f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 10641fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 10651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FirstType = static_cast<Expr*>(First)->getType(); 10661fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 1067c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (!FirstType->isDependentType() && 1068c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor !FirstType->isObjCObjectPointerType() && 1069a5e42a82ce055f29f3733f3a1f10da6cb9877deeFariborz Jahanian !FirstType->isBlockPointerType()) 1070dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 1071d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 10723ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 1073990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 10748189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 10758189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 10763ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 10775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1078ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithnamespace { 1079ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1080ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithenum BeginEndFunction { 1081ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_begin, 1082ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_end 1083ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith}; 1084ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1085ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Build a variable declaration for a for-range statement. 1086ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic VarDecl *BuildForRangeVarDecl(Sema &SemaRef, SourceLocation Loc, 1087ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType Type, const char *Name) { 1088ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclContext *DC = SemaRef.CurContext; 1089ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IdentifierInfo *II = &SemaRef.PP.getIdentifierTable().get(Name); 1090ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TypeSourceInfo *TInfo = SemaRef.Context.getTrivialTypeSourceInfo(Type, Loc); 1091ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *Decl = VarDecl::Create(SemaRef.Context, DC, Loc, Loc, II, Type, 1092ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TInfo, SC_Auto, SC_None); 1093b403d6d746239095a2c7bac958c924d92434e2b4Richard Smith Decl->setImplicit(); 1094ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return Decl; 1095ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1096ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1097ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Finish building a variable declaration for a for-range statement. 1098ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// \return true if an error occurs. 1099ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic bool FinishForRangeVarDecl(Sema &SemaRef, VarDecl *Decl, Expr *Init, 1100ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc, int diag) { 1101ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Deduce the type for the iterator variable now rather than leaving it to 1102ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // AddInitializerToDecl, so we can produce a more suitable diagnostic. 1103ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TypeSourceInfo *InitTSI = 0; 1104ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (Init->getType()->isVoidType() || 1105ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith !SemaRef.DeduceAutoType(Decl->getTypeSourceInfo(), Init, InitTSI)) 1106ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Loc, diag) << Init->getType(); 1107ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!InitTSI) { 1108ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setInvalidDecl(); 1109ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return true; 1110ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1111ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setTypeSourceInfo(InitTSI); 1112ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setType(InitTSI->getType()); 1113ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1114f85e193739c953358c865005855253af4f68a497John McCall // In ARC, infer lifetime. 1115f85e193739c953358c865005855253af4f68a497John McCall // FIXME: ARC may want to turn this into 'const __unsafe_unretained' if 1116f85e193739c953358c865005855253af4f68a497John McCall // we're doing the equivalent of fast iteration. 1117f85e193739c953358c865005855253af4f68a497John McCall if (SemaRef.getLangOptions().ObjCAutoRefCount && 1118f85e193739c953358c865005855253af4f68a497John McCall SemaRef.inferObjCARCLifetime(Decl)) 1119f85e193739c953358c865005855253af4f68a497John McCall Decl->setInvalidDecl(); 1120f85e193739c953358c865005855253af4f68a497John McCall 1121ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.AddInitializerToDecl(Decl, Init, /*DirectInit=*/false, 1122ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TypeMayContainAuto=*/false); 1123ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.FinalizeDeclaration(Decl); 1124b403d6d746239095a2c7bac958c924d92434e2b4Richard Smith SemaRef.CurContext->addHiddenDecl(Decl); 1125ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return false; 1126ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1127ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1128ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Produce a note indicating which begin/end function was implicitly called 1129ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// by a C++0x for-range statement. This is often not obvious from the code, 1130ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// nor from the diagnostics produced when analysing the implicit expressions 1131ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// required in a for-range statement. 1132ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithvoid NoteForRangeBeginEndFunction(Sema &SemaRef, Expr *E, 1133ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndFunction BEF) { 1134ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr *CE = dyn_cast<CallExpr>(E); 1135ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!CE) 1136ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return; 1137ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FunctionDecl *D = dyn_cast<FunctionDecl>(CE->getCalleeDecl()); 1138ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!D) 1139ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return; 1140ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc = D->getLocation(); 1141ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1142ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith std::string Description; 1143ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith bool IsTemplate = false; 1144ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FunctionTemplateDecl *FunTmpl = D->getPrimaryTemplate()) { 1145ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Description = SemaRef.getTemplateArgumentBindingsText( 1146ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FunTmpl->getTemplateParameters(), *D->getTemplateSpecializationArgs()); 1147ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IsTemplate = true; 1148ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1149ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1150ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Loc, diag::note_for_range_begin_end) 1151ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << BEF << IsTemplate << Description << E->getType(); 1152ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1153ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1154ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Build a call to 'begin' or 'end' for a C++0x for-range statement. If the 1155ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// given LookupResult is non-empty, it is assumed to describe a member which 1156ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// will be invoked. Otherwise, the function will be found via argument 1157ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// dependent lookup. 1158ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic ExprResult BuildForRangeBeginEndCall(Sema &SemaRef, Scope *S, 1159ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc, 1160ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *Decl, 1161ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndFunction BEF, 1162ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith const DeclarationNameInfo &NameInfo, 1163ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult &MemberLookup, 1164ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Range) { 1165ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult CallExpr; 1166ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!MemberLookup.empty()) { 1167ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult MemberRef = 1168ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.BuildMemberReferenceExpr(Range, Range->getType(), Loc, 1169ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*IsPtr=*/false, CXXScopeSpec(), 1170ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*Qualifier=*/0, MemberLookup, 1171ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TemplateArgs=*/0); 1172ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (MemberRef.isInvalid()) 1173ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1174ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr = SemaRef.ActOnCallExpr(S, MemberRef.get(), Loc, MultiExprArg(), 1175ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Loc, 0); 1176ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CallExpr.isInvalid()) 1177ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1178ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1179ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedSet<0> FoundNames; 1180ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // C++0x [stmt.ranged]p1: For the purposes of this name lookup, namespace 1181ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // std is an associated namespace. 1182ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedLookupExpr *Fn = 1183ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedLookupExpr::Create(SemaRef.Context, /*NamingClass=*/0, 1184ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NestedNameSpecifierLoc(), NameInfo, 1185ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*NeedsADL=*/true, /*Overloaded=*/false, 1186ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FoundNames.begin(), FoundNames.end(), 1187ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*LookInStdNamespace=*/true); 1188ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr = SemaRef.BuildOverloadedCallExpr(S, Fn, Fn, Loc, &Range, 1, Loc, 1189ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 0); 1190ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CallExpr.isInvalid()) { 1191ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Range->getLocStart(), diag::note_for_range_type) 1192ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << Range->getType(); 1193ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1194ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1195ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1196ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(SemaRef, Decl, CallExpr.get(), Loc, 1197ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1198ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(SemaRef, CallExpr.get(), BEF); 1199ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1200ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1201ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return CallExpr; 1202ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1203ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1204ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1205ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1206ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// ActOnCXXForRangeStmt - Check and build a C++0x for-range statement. 1207ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1208ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// C++0x [stmt.ranged]: 1209ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// A range-based for statement is equivalent to 1210ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1211ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// { 1212ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// auto && __range = range-init; 1213ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// for ( auto __begin = begin-expr, 1214ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// __end = end-expr; 1215ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// __begin != __end; 1216ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// ++__begin ) { 1217ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// for-range-declaration = *__begin; 1218ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// statement 1219ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// } 1220ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// } 1221ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1222ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// The body of the loop is not available yet, since it cannot be analysed until 1223ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// we have determined the type of the for-range-declaration. 1224ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult 1225ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithSema::ActOnCXXForRangeStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 1226ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Stmt *First, SourceLocation ColonLoc, Expr *Range, 1227ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RParenLoc) { 1228ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!First || !Range) 1229ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1230ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1231ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *DS = dyn_cast<DeclStmt>(First); 1232ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith assert(DS && "first part of for range not a decl stmt"); 1233ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1234ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!DS->isSingleDecl()) { 1235ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(DS->getStartLoc(), diag::err_type_defined_in_for_range); 1236ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1237ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1238ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DS->getSingleDecl()->isInvalidDecl()) 1239ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1240ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1241ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DiagnoseUnexpandedParameterPack(Range, UPPC_Expression)) 1242ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1243ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1244ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build auto && __range = range-init 1245ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RangeLoc = Range->getLocStart(); 1246ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *RangeVar = BuildForRangeVarDecl(*this, RangeLoc, 1247ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Context.getAutoRRefDeductType(), 1248ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__range"); 1249ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, RangeVar, Range, RangeLoc, 1250ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_deduction_failure)) 1251ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1252ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1253ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Claim the type doesn't contain auto: we've already done the checking. 1254ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclGroupPtrTy RangeGroup = 1255ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BuildDeclaratorGroup((Decl**)&RangeVar, 1, /*TypeMayContainAuto=*/false); 1256ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith StmtResult RangeDecl = ActOnDeclStmt(RangeGroup, RangeLoc, RangeLoc); 1257ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RangeDecl.isInvalid()) 1258ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1259ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1260ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return BuildCXXForRangeStmt(ForLoc, ColonLoc, RangeDecl.get(), 1261ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*BeginEndDecl=*/0, /*Cond=*/0, /*Inc=*/0, DS, 1262ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith RParenLoc); 1263ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1264ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1265ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// BuildCXXForRangeStmt - Build or instantiate a C++0x for-range statement. 1266ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult 1267ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithSema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc, 1268ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Stmt *RangeDecl, Stmt *BeginEnd, Expr *Cond, 1269ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Inc, Stmt *LoopVarDecl, 1270ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RParenLoc) { 1271ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Scope *S = getCurScope(); 1272ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1273ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *RangeDS = cast<DeclStmt>(RangeDecl); 1274ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *RangeVar = cast<VarDecl>(RangeDS->getSingleDecl()); 1275ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType RangeVarType = RangeVar->getType(); 1276ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1277ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *LoopVarDS = cast<DeclStmt>(LoopVarDecl); 1278ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *LoopVar = cast<VarDecl>(LoopVarDS->getSingleDecl()); 1279ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1280ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith StmtResult BeginEndDecl = BeginEnd; 1281ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult NotEqExpr = Cond, IncrExpr = Inc; 1282ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1283ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!BeginEndDecl.get() && !RangeVarType->isDependentType()) { 1284ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RangeLoc = RangeVar->getLocation(); 1285ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1286ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult RangeRef = BuildDeclRefExpr(RangeVar, 1287ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith RangeVarType.getNonReferenceType(), 1288ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1289ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RangeRef.isInvalid()) 1290ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1291ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1292ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType AutoType = Context.getAutoDeductType(); 1293ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Range = RangeVar->getInit(); 1294ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Range) 1295ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1296ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType RangeType = Range->getType(); 1297ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1298ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RequireCompleteType(RangeLoc, RangeType, 1299ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith PDiag(diag::err_for_range_incomplete_type))) 1300ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1301ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1302ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build auto __begin = begin-expr, __end = end-expr. 1303ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *BeginVar = BuildForRangeVarDecl(*this, ColonLoc, AutoType, 1304ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__begin"); 1305ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *EndVar = BuildForRangeVarDecl(*this, ColonLoc, AutoType, 1306ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__end"); 1307ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1308ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build begin-expr and end-expr and attach to __begin and __end variables. 1309ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BeginExpr, EndExpr; 1310ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (const ArrayType *UnqAT = RangeType->getAsArrayTypeUnsafe()) { 1311ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - if _RangeT is an array type, begin-expr and end-expr are __range and 1312ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // __range + __bound, respectively, where __bound is the array bound. If 1313ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // _RangeT is an array of unknown size or an array of incomplete type, 1314ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // the program is ill-formed; 1315ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1316ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // begin-expr is __range. 1317ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginExpr = RangeRef; 1318ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, BeginVar, RangeRef.get(), ColonLoc, 1319ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1320ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1321ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1322ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1323ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1324ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Find the array bound. 1325ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BoundExpr; 1326ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(UnqAT)) 1327ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr = Owned(IntegerLiteral::Create(Context, CAT->getSize(), 13281dd986dff9ddfbec687975700770bb377988e9edRichard Trieu Context.getPointerDiffType(), 13291dd986dff9ddfbec687975700770bb377988e9edRichard Trieu RangeLoc)); 1330ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith else if (const VariableArrayType *VAT = 1331ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith dyn_cast<VariableArrayType>(UnqAT)) 1332ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr = VAT->getSizeExpr(); 1333ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith else { 1334ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Can't be a DependentSizedArrayType or an IncompleteArrayType since 1335ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // UnqAT is not incomplete and Range is not type-dependent. 1336ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith assert(0 && "Unexpected array type in for-range"); 1337ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1338ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1339ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1340ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // end-expr is __range + __bound. 1341ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith EndExpr = ActOnBinOp(S, ColonLoc, tok::plus, RangeRef.get(), 1342ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr.get()); 1343ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (EndExpr.isInvalid()) 1344ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1345ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, EndVar, EndExpr.get(), ColonLoc, 1346ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1347ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1348ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1349ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1350ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1351ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclarationNameInfo BeginNameInfo(&PP.getIdentifierTable().get("begin"), 1352ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc); 1353ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclarationNameInfo EndNameInfo(&PP.getIdentifierTable().get("end"), 1354ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc); 1355ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1356ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult BeginMemberLookup(*this, BeginNameInfo, LookupMemberName); 1357ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult EndMemberLookup(*this, EndNameInfo, LookupMemberName); 1358ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1359ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CXXRecordDecl *D = RangeType->getAsCXXRecordDecl()) { 1360ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - if _RangeT is a class type, the unqualified-ids begin and end are 1361ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // looked up in the scope of class _RangeT as if by class member access 1362ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // lookup (3.4.5), and if either (or both) finds at least one 1363ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // declaration, begin-expr and end-expr are __range.begin() and 1364ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // __range.end(), respectively; 1365ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupQualifiedName(BeginMemberLookup, D); 1366ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupQualifiedName(EndMemberLookup, D); 1367ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1368ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (BeginMemberLookup.empty() != EndMemberLookup.empty()) { 1369ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(ColonLoc, diag::err_for_range_member_begin_end_mismatch) 1370ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << RangeType << BeginMemberLookup.empty(); 1371ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1372ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1373ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1374ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - otherwise, begin-expr and end-expr are begin(__range) and 1375ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // end(__range), respectively, where begin and end are looked up with 1376ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // argument-dependent lookup (3.4.2). For the purposes of this name 1377ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // lookup, namespace std is an associated namespace. 1378ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1379ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1380ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, BeginVar, 1381ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_begin, BeginNameInfo, 1382ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginMemberLookup, RangeRef.get()); 1383ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (BeginExpr.isInvalid()) 1384ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1385ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1386ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith EndExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, EndVar, 1387ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_end, EndNameInfo, 1388ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith EndMemberLookup, RangeRef.get()); 1389ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (EndExpr.isInvalid()) 1390ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1391ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1392ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1393ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // C++0x [decl.spec.auto]p6: BeginType and EndType must be the same. 1394ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType BeginType = BeginVar->getType(), EndType = EndVar->getType(); 1395ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Context.hasSameType(BeginType, EndType)) { 1396ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(RangeLoc, diag::err_for_range_begin_end_types_differ) 1397ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << BeginType << EndType; 1398ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1399ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1400ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1401ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1402ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl *BeginEndDecls[] = { BeginVar, EndVar }; 1403ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Claim the type doesn't contain auto: we've already done the checking. 1404ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclGroupPtrTy BeginEndGroup = 1405ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BuildDeclaratorGroup(BeginEndDecls, 2, /*TypeMayContainAuto=*/false); 1406ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndDecl = ActOnDeclStmt(BeginEndGroup, ColonLoc, ColonLoc); 1407ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1408ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BeginRef = BuildDeclRefExpr(BeginVar, 1409ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginType.getNonReferenceType(), 1410ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1411ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult EndRef = BuildDeclRefExpr(EndVar, EndType.getNonReferenceType(), 1412ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1413ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1414ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check __begin != __end expression. 1415ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnBinOp(S, ColonLoc, tok::exclaimequal, 1416ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginRef.get(), EndRef.get()); 1417ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnBooleanCondition(S, ColonLoc, NotEqExpr.get()); 1418ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnFinishFullExpr(NotEqExpr.get()); 1419ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (NotEqExpr.isInvalid()) { 1420ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1421ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Context.hasSameType(BeginType, EndType)) 1422ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1423ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1424ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1425ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1426ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check ++__begin expression. 1427ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IncrExpr = ActOnUnaryOp(S, ColonLoc, tok::plusplus, BeginRef.get()); 1428ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IncrExpr = ActOnFinishFullExpr(IncrExpr.get()); 1429ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (IncrExpr.isInvalid()) { 1430ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1431ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1432ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1433ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1434ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check *__begin expression. 1435ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult DerefExpr = ActOnUnaryOp(S, ColonLoc, tok::star, BeginRef.get()); 1436ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DerefExpr.isInvalid()) { 1437ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1438ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1439ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1440ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1441ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Attach *__begin as initializer for VD. 1442ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!LoopVar->isInvalidDecl()) { 1443ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith AddInitializerToDecl(LoopVar, DerefExpr.get(), /*DirectInit=*/false, 1444ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TypeMayContainAuto=*/true); 1445ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (LoopVar->isInvalidDecl()) 1446ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1447ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1448cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith } else { 1449cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith // The range is implicitly used as a placeholder when it is dependent. 1450cd6f36693ed40cef8c8639c04438d865187c1f73Richard Smith RangeVar->setUsed(); 1451ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1452ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1453ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return Owned(new (Context) CXXForRangeStmt(RangeDS, 1454ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith cast_or_null<DeclStmt>(BeginEndDecl.get()), 1455ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr.take(), IncrExpr.take(), 1456ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LoopVarDS, /*Body=*/0, ForLoc, 1457ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc, RParenLoc)); 1458ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1459ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1460ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// FinishCXXForRangeStmt - Attach the body to a C++0x for-range statement. 1461ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// This is a separate step from ActOnCXXForRangeStmt because analysis of the 1462ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// body cannot be performed until after the type of the range variable is 1463ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// determined. 1464ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult Sema::FinishCXXForRangeStmt(Stmt *S, Stmt *B) { 1465ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!S || !B) 1466ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1467ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1468ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith cast<CXXForRangeStmt>(S)->setBody(B); 1469ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return S; 1470ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1471ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 147257ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerStmtResult Sema::ActOnGotoStmt(SourceLocation GotoLoc, 147357ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation LabelLoc, 147457ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner LabelDecl *TheDecl) { 147557ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner getCurFunction()->setHasBranchIntoScope(); 1476ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setUsed(); 1477ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(new (Context) GotoStmt(TheDecl, GotoLoc, LabelLoc)); 14785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 14795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 148060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1481ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 14829ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E) { 1483bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 14845f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 14855f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 14862877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth QualType DestTy = Context.getPointerType(Context.VoidTy.withConst()); 1487429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult ExprRes = Owned(E); 14885f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 1489429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CheckSingleAssignmentConstraints(DestTy, ExprRes); 1490429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (ExprRes.isInvalid()) 1491429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1492429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley E = ExprRes.take(); 14932877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth if (DiagnoseAssignmentResult(ConvTy, StarLoc, DestTy, ETy, E, AA_Passing)) 14945f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 14955f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 1496b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 1497781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasIndirectGoto(); 1498b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 14995f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 15005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 15015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 150260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 15031b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 15045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 15055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 15065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 15074cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 15085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 15094cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 15108189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 15115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 15125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 151360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 15141b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 15155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 15165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 15175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 15184cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 15195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 15204cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 15218189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 15225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 15235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1524dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \brief Determine whether the given expression is a candidate for 1525f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// copy elision in either a return statement or a throw expression. 15265077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1527f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param ReturnType If we're determining the copy elision candidate for 1528f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// a return statement, this is the return type of the function. If we're 1529f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// determining the copy elision candidate for a throw expression, this will 1530f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// be a NULL type. 15315077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1532f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param E The expression being returned from the function or block, or 1533f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// being thrown. 15345077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 15354926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// \param AllowFunctionParameter Whether we allow function parameters to 15364926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// be considered NRVO candidates. C++ prohibits this for NRVO itself, but 15374926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// we re-use this logic to determine whether we should try to move as part of 15384926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// a return or throw (which does allow function parameters). 15395077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 15405077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \returns The NRVO candidate variable, if the return statement may use the 15415077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// NRVO, or NULL if there is no such candidate. 1542f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregorconst VarDecl *Sema::getCopyElisionCandidate(QualType ReturnType, 1543f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor Expr *E, 1544f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor bool AllowFunctionParameter) { 1545f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor QualType ExprType = E->getType(); 15463c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // - in a return statement in a function with ... 15473c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // ... a class return type ... 1548f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType.isNull()) { 1549f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType->isRecordType()) 1550f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1551f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // ... the same cv-unqualified type as the function return type ... 1552f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!Context.hasSameUnqualifiedType(ReturnType, ExprType)) 1553f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1554f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor } 1555dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1556dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // ... the expression is the name of a non-volatile automatic object 1557f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // (other than a function or catch-clause parameter)) ... 1558f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(E->IgnoreParens()); 15593c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!DR) 15605077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 15613c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 15623c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!VD) 15635077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 1564dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1565f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (VD->hasLocalStorage() && !VD->isExceptionVariable() && 1566d86c477fb5d3fc34864afecbbb5443da9355e8fbDouglas Gregor !VD->getType()->isReferenceType() && !VD->hasAttr<BlocksAttr>() && 1567f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor !VD->getType().isVolatileQualified() && 15684a46c77813af1241139b81a086b539e4d734cb86Douglas Gregor ((VD->getKind() == Decl::Var) || 15694a46c77813af1241139b81a086b539e4d734cb86Douglas Gregor (AllowFunctionParameter && VD->getKind() == Decl::ParmVar))) 15705077c3876beeaed32280af88244e8050078619a8Douglas Gregor return VD; 1571dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 15725077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 15733c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor} 15743c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor 157507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// \brief Perform the initialization of a potentially-movable value, which 157607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// is the result of return value. 1577cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// 1578cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// This routine implements C++0x [class.copy]p33, which attempts to treat 1579cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// returned lvalues as rvalues in certain cases (to prefer move construction), 1580cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// then falls back to treating them as lvalues if that failed. 1581dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiExprResult 158207f402cff25354c5f06f307f19b0c57c09d964bdDouglas GregorSema::PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 158307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor const VarDecl *NRVOCandidate, 158407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor QualType ResultType, 1585bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor Expr *Value, 1586bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor bool AllowNRVO) { 1587cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // C++0x [class.copy]p33: 1588dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // When the criteria for elision of a copy operation are met or would 1589dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // be met save for the fact that the source object is a function 1590dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // parameter, and the object to be copied is designated by an lvalue, 1591cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // overload resolution to select the constructor for the copy is first 1592cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // performed as if the object were designated by an rvalue. 1593cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor ExprResult Res = ExprError(); 1594bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor if (AllowNRVO && 1595bca01b46850f867b2f4137f25c882022b58f8471Douglas Gregor (NRVOCandidate || getCopyElisionCandidate(ResultType, Value, true))) { 1596dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ImplicitCastExpr AsRvalue(ImplicitCastExpr::OnStack, 159707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getType(), CK_LValueToRValue, 159807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value, VK_XValue); 1599dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1600cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Expr *InitExpr = &AsRvalue; 1601dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializationKind Kind 160207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = InitializationKind::CreateCopy(Value->getLocStart(), 160307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getLocStart()); 160407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor InitializationSequence Seq(*this, Entity, Kind, &InitExpr, 1); 1605dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1606dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // [...] If overload resolution fails, or if the type of the first 1607cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // parameter of the selected constructor is not an rvalue reference 16080099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // to the object's type (possibly cv-qualified), overload resolution 1609cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // is performed again, considering the object as an lvalue. 1610383616cd2e61131a534afd9364ef53f643e1f834Sebastian Redl if (Seq) { 1611cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor for (InitializationSequence::step_iterator Step = Seq.step_begin(), 1612cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor StepEnd = Seq.step_end(); 1613cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Step != StepEnd; ++Step) { 1614383616cd2e61131a534afd9364ef53f643e1f834Sebastian Redl if (Step->Kind != InitializationSequence::SK_ConstructorInitialization) 1615cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor continue; 1616dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1617dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CXXConstructorDecl *Constructor 1618cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor = cast<CXXConstructorDecl>(Step->Function.Function); 1619dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1620cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor const RValueReferenceType *RRefType 162107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = Constructor->getParamDecl(0)->getType() 162207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor ->getAs<RValueReferenceType>(); 1623dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1624cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // If we don't meet the criteria, break out now. 1625dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!RRefType || 162607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor !Context.hasSameUnqualifiedType(RRefType->getPointeeType(), 162707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Context.getTypeDeclType(Constructor->getParent()))) 1628cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor break; 1629dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1630cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Promote "AsRvalue" to the heap, since we now need this 1631cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // expression node to persist. 163207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value = ImplicitCastExpr::Create(Context, Value->getType(), 1633dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CK_LValueToRValue, Value, 0, 163407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor VK_XValue); 1635dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1636cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Complete type-checking the initialization of the return type 1637cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // using the constructor we found. 163807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = Seq.Perform(*this, Entity, Kind, MultiExprArg(&Value, 1)); 1639cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1640cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1641cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1642dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1643cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Either we didn't meet the criteria for treating an lvalue as an rvalue, 1644dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // above, or overload resolution failed. Either way, we need to try 1645cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // (again) now with the return value expression as written. 1646cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor if (Res.isInvalid()) 164707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = PerformCopyInitialization(Entity, SourceLocation(), Value); 1648dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1649cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor return Res; 1650cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor} 1651cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor 165227c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 16534eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 165460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 16554eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 16564eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 16574eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 16589ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor BlockScopeInfo *CurBlock = getCurBlock(); 16597d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CurBlock->ReturnType.isNull()) { 1660c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 166116564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 166216564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 1663429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(RetValExp); 1664429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1665429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1666429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley RetValExp = Result.take(); 16676a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor 16686a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor if (!RetValExp->isTypeDependent()) { 16696a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor CurBlock->ReturnType = RetValExp->getType(); 16706a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(RetValExp)) { 16716a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor // We have to remove a 'const' added to copied-in variable which was 16726a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor // part of the implementation spec. and not the actual qualifier for 16736a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor // the variable. 16746a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor if (CDRE->isConstQualAdded()) 16756a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor CurBlock->ReturnType.removeLocalConst(); // FIXME: local??? 16766a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor } 16776a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor } else 16786a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor CurBlock->ReturnType = Context.DependentTy; 1679c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 16807d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = Context.VoidTy; 16814eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 16827d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian QualType FnRetType = CurBlock->ReturnType; 16834cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1684711c52bb20d0c69063b52a99826fb7d2835501f1John McCall if (CurBlock->FunctionType->getAs<FunctionType>()->getNoReturnAttr()) { 16856c92fa75e62937f9738696840efcb258560f4568Mike Stump Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr) 16866c92fa75e62937f9738696840efcb258560f4568Mike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 16876c92fa75e62937f9738696840efcb258560f4568Mike Stump return StmtError(); 16886c92fa75e62937f9738696840efcb258560f4568Mike Stump } 16896c92fa75e62937f9738696840efcb258560f4568Mike Stump 16904eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 16914eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 16924eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 16935077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 16944eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 1695bc3e64f37fe2c68ab4bfcedf6f428e0198f2e349Douglas Gregor if (RetValExp && !RetValExp->isTypeDependent() && 1696bc3e64f37fe2c68ab4bfcedf6f428e0198f2e349Douglas Gregor (!getLangOptions().CPlusPlus || !RetValExp->getType()->isVoidType())) { 16974eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 16984eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 16994eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 17005077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 17015077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp) { 1702bc3e64f37fe2c68ab4bfcedf6f428e0198f2e349Douglas Gregor if (!CurBlock->ReturnType->isDependentType()) 1703bc3e64f37fe2c68ab4bfcedf6f428e0198f2e349Douglas Gregor return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 1704bc3e64f37fe2c68ab4bfcedf6f428e0198f2e349Douglas Gregor 1705bc3e64f37fe2c68ab4bfcedf6f428e0198f2e349Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, 0, 0); 17065077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 17075077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 1708dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17095077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 17105077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void block with an expression, continue checking 17115077c3876beeaed32280af88244e8050078619a8Douglas Gregor 17125077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 17135077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 17145077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 17155077c3876beeaed32280af88244e8050078619a8Douglas Gregor 17165077c3876beeaed32280af88244e8050078619a8Douglas Gregor // In C++ the return statement is handled via a copy initialization. 17175077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 1718f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 1719dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 172007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 172107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor NRVOCandidate != 0); 1722dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 172307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 17245077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 17255077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 17265077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 17275077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 1728dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1729b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1730b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 17314765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1732b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 17334cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 17345077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 1735dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 17365077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 1737c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson } 1738dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17395077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 174098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 17414cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1742dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 17435077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 17446a576ab708d3aa7d40e5d867ab1de5d3cb507553Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 17455077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 17465077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1747dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17485077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 17494eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 17505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 175160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 17529ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 1753fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor // Check for unexpanded parameter packs. 1754fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor if (RetValExp && DiagnoseUnexpandedParameterPack(RetValExp)) 1755fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor return StmtError(); 1756fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor 17579ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor if (getCurBlock()) 17584eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 17594cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1760371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 1761926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor QualType DeclaredRetType; 1762f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 1763371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 1764926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor DeclaredRetType = FnRetType; 176504a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall if (FD->hasAttr<NoReturnAttr>() || 176604a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall FD->getType()->getAs<FunctionType>()->getNoReturnAttr()) 17678662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 1768f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 1769926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else if (ObjCMethodDecl *MD = getCurMethodDecl()) { 1770926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor DeclaredRetType = MD->getResultType(); 1771926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor if (MD->hasRelatedResultType() && MD->getClassInterface()) { 1772926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // In the implementation of a method with a related return type, the 1773926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // type used to type-check the validity of return statements within the 1774926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // method body is a pointer to the type of the class being implemented. 1775926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor FnRetType = Context.getObjCInterfaceType(MD->getClassInterface()); 1776926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor FnRetType = Context.getObjCObjectPointerType(FnRetType); 1777926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else { 1778926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor FnRetType = DeclaredRetType; 1779926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } 1780926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else // If we don't have a function/method context, bail. 1781c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 17821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17835077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 17845cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 17858d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (RetValExp) { 17868d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (!RetValExp->isTypeDependent()) { 17878d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky // C99 6.8.6.4p1 (ext_ since GCC warns) 17888d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky unsigned D = diag::ext_return_has_expr; 17898d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (RetValExp->getType()->isVoidType()) 17908d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky D = diag::ext_return_has_void_expr; 17918d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky else { 17928d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky ExprResult Result = Owned(RetValExp); 17938d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Result = IgnoredValueConversions(Result.take()); 17948d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (Result.isInvalid()) 17958d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky return StmtError(); 17968d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky RetValExp = Result.take(); 17978d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky RetValExp = ImpCastExprToType(RetValExp, 17988d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Context.VoidTy, CK_ToVoid).take(); 17998d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky } 18004cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 18018d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky // return (some void expression); is legal in C++. 18028d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky if (D != diag::ext_return_has_void_expr || 18038d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky !getLangOptions().CPlusPlus) { 18048d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 1805ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth 1806ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth int FunctionKind = 0; 1807ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth if (isa<ObjCMethodDecl>(CurDecl)) 1808ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 1; 1809ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth else if (isa<CXXConstructorDecl>(CurDecl)) 1810ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 2; 1811ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth else if (isa<CXXDestructorDecl>(CurDecl)) 1812ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth FunctionKind = 3; 1813ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth 18148d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky Diag(ReturnLoc, D) 1815ca0d0d4a0d6ecd256d4bf8c1a0dc183a83119833Chandler Carruth << CurDecl->getDeclName() << FunctionKind 18168d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky << RetValExp->getSourceRange(); 18178d7946151cd15c0e7c34250c122d59b2f5027999Nick Lewycky } 1818e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 18191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1820b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 18214765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 18225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1823dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 18245077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 18255077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp && !FnRetType->isDependentType()) { 18263c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 18273c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 18283c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 18293c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 18303c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 183108631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 18323c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 183308631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 18345077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc); 18355077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 18365077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 18375077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 18385077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void function with an expression, continue checking 18395077c3876beeaed32280af88244e8050078619a8Douglas Gregor 18405077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 18415077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 18425077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 18435077c3876beeaed32280af88244e8050078619a8Douglas Gregor 1844856d3798af7c2f7251e4a295f3da7a09ce4c62abJohn McCall // In C++ the return statement is handled via a copy initialization, 18455077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 1846f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 1847dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 184807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 184958f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet NRVOCandidate != 0); 1850dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 185107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 18525077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 18535077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 18545077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 18555077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 18564cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 18575077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 1858dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 18595077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 186066724ea67d7d598b937d86fa66f03f09a1c758f3Douglas Gregor } 1861dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1862b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1863926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // If we type-checked an Objective-C method's return type based 1864926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // on a related return type, we may need to adjust the return 1865926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // type again. Do so now. 1866926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor if (DeclaredRetType != FnRetType) { 1867926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor ExprResult result = PerformImplicitConversion(RetValExp, 1868926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor DeclaredRetType, 1869926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor AA_Returning); 1870926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor if (result.isInvalid()) return StmtError(); 1871926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor RetValExp = result.take(); 1872926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } 1873926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor 1874b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 18754765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1876b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 18775077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 1878898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 1879dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1880dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 18815077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 18825077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 18835077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 18845077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1885f85e193739c953358c865005855253af4f68a497John McCall 18865077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 18875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 18885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1889810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 1890810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 1891810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 1892810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 1893810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 1894810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 1895810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 1896810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 1897703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson // Type dependent expressions will be checked during instantiation. 1898703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson if (E->isTypeDependent()) 1899703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson return false; 1900dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 19017eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E->isLValue()) 1902810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 1903810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1904810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 1905810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 1906810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 19077eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E != E2 && E2->isLValue()) { 1908810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (!S.getLangOptions().HeinousExtensions) 1909810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 1910810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1911810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 1912810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 1913810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1914810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 1915810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 1916810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 1917810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1918810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 1919810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 1920810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 1921810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1922ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// isOperandMentioned - Return true if the specified operand # is mentioned 1923ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// anywhere in the decomposed asm string. 1924ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattnerstatic bool isOperandMentioned(unsigned OpNo, 19252d3ba4f5a923a90c3fc290ddfba5e36c2d0a9b46Chris Lattner ArrayRef<AsmStmt::AsmStringPiece> AsmStrPieces) { 1926ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner for (unsigned p = 0, e = AsmStrPieces.size(); p != e; ++p) { 1927ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner const AsmStmt::AsmStringPiece &Piece = AsmStrPieces[p]; 1928ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (!Piece.isOperand()) continue; 1929ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1930ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 1931ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 1932ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (Piece.getOperandNo() == OpNo) 1933ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return true; 1934ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 1935ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1936ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return false; 1937ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner} 1938810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1939ca57b4b7658a031b74cda5ac504311998be8e343Chris LattnerStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, bool IsSimple, 1940ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner bool IsVolatile, unsigned NumOutputs, 1941ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner unsigned NumInputs, IdentifierInfo **Names, 1942ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner MultiExprArg constraints, MultiExprArg exprs, 1943ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner Expr *asmString, MultiExprArg clobbers, 1944ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner SourceLocation RParenLoc, bool MSAsm) { 19453037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 19463037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 19473037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 19489ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr **Exprs = exprs.get(); 19499ae2f076ca5ab1feb3ba95629099ec2319833701John McCall StringLiteral *AsmString = cast<StringLiteral>(asmString); 19503037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 19513037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 19525f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 19531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19541708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 19555cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!AsmString->isAscii()) 19563037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 19573037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 19583037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 19591708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 19601708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 19615cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 19623037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 19633037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 19643037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 19655f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef OutputName; 1966ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1967ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson OutputName = Names[i]->getName(); 1968ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1969ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 1970432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner if (!Context.Target.validateOutputConstraint(Info)) 19713037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1972432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 1973432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 19743037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1975d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 197672056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 1977810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 197872056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 1979dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 198072056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 198104728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 19821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 198344def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 198404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 19853037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 19865f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 1987806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 198804728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 19891708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 19905cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 19913037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 19923037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 19933037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 19945f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef InputName; 1995ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1996ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson InputName = Names[i]->getName(); 1997ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1998ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 1999beaaccd8e2a8748f77b66e2b330fb9136937e14cJay Foad if (!Context.Target.validateInputConstraint(OutputConstraintInfos.data(), 20002819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 20013037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 2002432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 2003432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 2004d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 20053037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 200672056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 20073037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2008d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 200944def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 2010810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 201172056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 2012d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 2013432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 201472056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 201504728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 20163037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 201744def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 2018d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 201972056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 2020d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 20211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump << InputExpr->getType() << Info.getConstraintStr() 202272056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 2023d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 2024d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 20251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2026429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(Exprs[i]); 2027429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2028429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 20291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2030429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Exprs[i] = Result.take(); 2031806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 203204728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 20333037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 20346fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 20351708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 20361708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 20375cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!Literal->isAscii()) 20383037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 20393037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 20403037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 20415f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Clobber = Literal->getString(); 20423037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2043de31fd7eeebdc64fb043463e7f515dab8eccac8dEric Christopher if (!Context.Target.isValidClobber(Clobber)) 20443037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 20457765934ad7e157b5fcf925792a38e01b1edbcf8aDaniel Dunbar diag::err_asm_unknown_register_name) << Clobber); 20466fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 20473037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 2048fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 2049dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm, 2050dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NumOutputs, NumInputs, Names, Constraints, Exprs, 2051966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson AsmString, NumClobbers, Clobbers, RParenLoc); 2052fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 2053fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 20545f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 2055fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 2056fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 20572ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 20582ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 2059fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 2060fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 20611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2062806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 2063806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 2064806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 20651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2066806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 2067806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 2068806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 2069806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 20701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2071806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 2072935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner unsigned InputOpNo = i+NumOutputs; 2073f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 2074935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Expr *InputExpr = Exprs[InputOpNo]; 20757adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 20767adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 20777adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 2078806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 20791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2080aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // Decide if the input and output are in the same domain (integer/ptr or 2081aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // floating point. 2082aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner enum AsmDomain { 2083aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner AD_Int, AD_FP, AD_Other 2084aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner } InputDomain, OutputDomain; 2085dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2086aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (InTy->isIntegerType() || InTy->isPointerType()) 2087aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Int; 20880c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (InTy->isRealFloatingType()) 2089aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_FP; 2090aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 2091aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Other; 20923351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 2093aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutTy->isIntegerType() || OutTy->isPointerType()) 2094aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Int; 20950c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (OutTy->isRealFloatingType()) 2096aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_FP; 2097aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 2098aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Other; 2099dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2100aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // They are ok if they are the same size and in the same domain. This 2101aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // allows tying things like: 2102aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int* 2103aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int if they are the same size. 2104aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // double to long double if they are the same size. 2105dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // 2106aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 2107aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 2108aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutSize == InSize && InputDomain == OutputDomain && 2109aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain != AD_Other) 2110aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 2111dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2112aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 2113f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // then we can promote the smaller one to a larger input and the asm string 2114f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // won't notice. 2115aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner bool SmallerValueMentioned = false; 2116ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 2117ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 2118ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 2119935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (isOperandMentioned(InputOpNo, Pieces)) { 2120ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // This is a use in the asm string of the smaller operand. Since we 2121ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // codegen this by promoting to a wider value, the asm will get printed 2122ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // "wrong". 2123f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= InSize < OutSize; 2124ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 2125f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner if (isOperandMentioned(TiedTo, Pieces)) { 2126ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the output, and if the output is the larger 2127ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // value, then it's ok because we'll promote the input to the larger type. 2128f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= OutSize < InSize; 2129806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 21301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2131aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 2132aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // output was a register, just extend the shorter one to the size of the 2133aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // larger one. 2134aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (!SmallerValueMentioned && InputDomain != AD_Other && 2135aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 2136aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 2137f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner 2138935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // Either both of the operands were mentioned or the smaller one was 2139935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // mentioned. One more special case that we'll allow: if the tied input is 2140935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // integer, unmentioned, and is a constant, then we'll allow truncating it 2141935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // down to the size of the destination. 2142935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (InputDomain == AD_Int && OutputDomain == AD_Int && 2143935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner !isOperandMentioned(InputOpNo, Pieces) && 2144935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner InputExpr->isEvaluatable(Context)) { 21454da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall CastKind castKind = 21464da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall (OutTy->isBooleanType() ? CK_IntegralToBoolean : CK_IntegralCast); 21474da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall InputExpr = ImpCastExprToType(InputExpr, OutTy, castKind).take(); 2148935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Exprs[InputOpNo] = InputExpr; 2149935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner NS->setInputExpr(i, InputExpr); 2150935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner continue; 2151935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner } 2152935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner 2153c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 2154806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 21557adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 2156806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 2157806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 2158806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 21591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2160fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 2161fe795956194141c91ae555985c9b930595bff43fChris Lattner} 21623b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 216360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2164431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 2165d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall SourceLocation RParen, Decl *Parm, 21669ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *Body) { 2167d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall VarDecl *Var = cast_or_null<VarDecl>(Parm); 2168160b5630aa781ac348303e1ae088d27016637778Douglas Gregor if (Var && Var->isInvalidDecl()) 2169160b5630aa781ac348303e1ae088d27016637778Douglas Gregor return StmtError(); 2170dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 21719ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtCatchStmt(AtLoc, RParen, Var, Body)); 21723b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 21733b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 217460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 21759ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body) { 21769ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, Body)); 2177161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 2178bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 217960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2180dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 21819ae2f076ca5ab1feb3ba95629099ec2319833701John McCall MultiStmtArg CatchStmts, Stmt *Finally) { 2182da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson if (!getLangOptions().ObjCExceptions) 2183da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@try"; 2184da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 2185781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 21868f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor unsigned NumCatchStmts = CatchStmts.size(); 21879ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(ObjCAtTryStmt::Create(Context, AtLoc, Try, 21889ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CatchStmts.release(), 21898f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor NumCatchStmts, 21909ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Finally)); 2191bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 2192bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 219360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::BuildObjCAtThrowStmt(SourceLocation AtLoc, 21949ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Throw) { 2195d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (Throw) { 2196f2dd68fb37a62571a4985c8dd05310ac90d07ef0Fariborz Jahanian Throw = MaybeCreateExprWithCleanups(Throw); 2197429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultLvalueConversion(Throw); 2198429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2199429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 22005e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 2201429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Throw = Result.take(); 2202d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor QualType ThrowType = Throw->getType(); 2203d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor // Make sure the expression type is an ObjC pointer or "void *". 2204d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!ThrowType->isDependentType() && 2205d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor !ThrowType->isObjCObjectPointerType()) { 2206d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor const PointerType *PT = ThrowType->getAs<PointerType>(); 2207d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!PT || !PT->getPointeeType()->isVoidType()) 2208d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 2209d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor << Throw->getType() << Throw->getSourceRange()); 2210d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 2211d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 2212dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 22139ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtThrowStmt(AtLoc, Throw)); 2214d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor} 2215d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor 221660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2217dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2218d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor Scope *CurScope) { 2219da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson if (!getLangOptions().ObjCExceptions) 2220da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@throw"; 2221da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 22229ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Throw) { 2223e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 2224e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 2225e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 2226e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 2227e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 2228e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 22294ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 2230dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 2231f2dd68fb37a62571a4985c8dd05310ac90d07ef0Fariborz Jahanian 22329ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return BuildObjCAtThrowStmt(AtLoc, Throw); 223339f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 2234bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 223507524039dce5c820f111a1b3f772b4261f004b4aJohn McCallExprResult 223607524039dce5c820f111a1b3f772b4261f004b4aJohn McCallSema::ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, Expr *operand) { 223707524039dce5c820f111a1b3f772b4261f004b4aJohn McCall ExprResult result = DefaultLvalueConversion(operand); 223807524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (result.isInvalid()) 223907524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return ExprError(); 224007524039dce5c820f111a1b3f772b4261f004b4aJohn McCall operand = result.take(); 22415e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 2242a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 224307524039dce5c820f111a1b3f772b4261f004b4aJohn McCall QualType type = operand->getType(); 224407524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (!type->isDependentType() && 224507524039dce5c820f111a1b3f772b4261f004b4aJohn McCall !type->isObjCObjectPointerType()) { 224607524039dce5c820f111a1b3f772b4261f004b4aJohn McCall const PointerType *pointerType = type->getAs<PointerType>(); 224707524039dce5c820f111a1b3f772b4261f004b4aJohn McCall if (!pointerType || !pointerType->getPointeeType()->isVoidType()) 224807524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return Diag(atLoc, diag::error_objc_synchronized_expects_object) 224907524039dce5c820f111a1b3f772b4261f004b4aJohn McCall << type << operand->getSourceRange(); 2250a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 22511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 225207524039dce5c820f111a1b3f772b4261f004b4aJohn McCall // The operand to @synchronized is a full-expression. 225307524039dce5c820f111a1b3f772b4261f004b4aJohn McCall return MaybeCreateExprWithCleanups(operand); 225407524039dce5c820f111a1b3f772b4261f004b4aJohn McCall} 225507524039dce5c820f111a1b3f772b4261f004b4aJohn McCall 225607524039dce5c820f111a1b3f772b4261f004b4aJohn McCallStmtResult 225707524039dce5c820f111a1b3f772b4261f004b4aJohn McCallSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, Expr *SyncExpr, 225807524039dce5c820f111a1b3f772b4261f004b4aJohn McCall Stmt *SyncBody) { 225907524039dce5c820f111a1b3f772b4261f004b4aJohn McCall // We can't jump into or indirect-jump out of a @synchronized block. 226007524039dce5c820f111a1b3f772b4261f004b4aJohn McCall getCurFunction()->setHasBranchProtectedScope(); 22619ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, SyncExpr, SyncBody)); 2262fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 22634b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 22644b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 22654b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 226660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2267d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, Decl *ExDecl, 22689ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *HandlerBlock) { 22694b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 22708189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 2271d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall cast_or_null<VarDecl>(ExDecl), 22729ae2f076ca5ab1feb3ba95629099ec2319833701John McCall HandlerBlock)); 22734b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 22748351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 2275f85e193739c953358c865005855253af4f68a497John McCallStmtResult 2276f85e193739c953358c865005855253af4f68a497John McCallSema::ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body) { 2277f85e193739c953358c865005855253af4f68a497John McCall getCurFunction()->setHasBranchProtectedScope(); 2278f85e193739c953358c865005855253af4f68a497John McCall return Owned(new (Context) ObjCAutoreleasePoolStmt(AtLoc, Body)); 2279f85e193739c953358c865005855253af4f68a497John McCall} 2280f85e193739c953358c865005855253af4f68a497John McCall 22813c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 22823c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 2283c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlclass TypeWithHandler { 2284c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType t; 2285c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *stmt; 2286c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlpublic: 2287c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler(const QualType &type, CXXCatchStmt *statement) 2288c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl : t(type), stmt(statement) {} 2289c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 22900953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // An arbitrary order is fine as long as it places identical 22910953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // types next to each other. 2292c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator<(const TypeWithHandler &y) const { 22930953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() < y.t.getAsOpaquePtr()) 2294c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return true; 22950953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() > y.t.getAsOpaquePtr()) 2296c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return false; 2297c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl else 2298c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return getTypeSpecStartLoc() < y.getTypeSpecStartLoc(); 2299c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 23001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2301c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator==(const TypeWithHandler& other) const { 23020953e767ff7817f97b3ab20896b229891eeff45bJohn McCall return t == other.t; 2303c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 23041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2305c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *getCatchStmt() const { return stmt; } 2306c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl SourceLocation getTypeSpecStartLoc() const { 2307c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return stmt->getExceptionDecl()->getTypeSpecStartLoc(); 2308c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 2309c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl}; 2310c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 23113c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 23123c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 23138351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 23148351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 231560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 23169ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 23178351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 2318729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson // Don't report an error if 'try' is used in system headers. 231915348aeb81285c75b2e92b5bf8d2db3445d147c2Anders Carlsson if (!getLangOptions().CXXExceptions && 2320729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson !getSourceManager().isInSystemHeader(TryLoc)) 2321729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson Diag(TryLoc, diag::err_exceptions_disabled) << "try"; 23227f11d9cf5df1f8ce82af46eabc4ec5cec7d580b0Anders Carlsson 23238351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 23248351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 23258351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 23269ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt **Handlers = RawHandlers.get(); 23278351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 23285f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TypeWithHandler, 8> TypesWithHandlers; 23291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (unsigned i = 0; i < NumHandlers; ++i) { 23315f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner CXXCatchStmt *Handler = cast<CXXCatchStmt>(Handlers[i]); 2332c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (!Handler->getExceptionDecl()) { 2333c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (i < NumHandlers - 1) 2334c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return StmtError(Diag(Handler->getLocStart(), 2335c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::err_early_catch_all)); 23361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2337c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl continue; 2338c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 23391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2340c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CaughtType = Handler->getCaughtType(); 2341c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CanonicalCaughtType = Context.getCanonicalType(CaughtType); 2342c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypesWithHandlers.push_back(TypeWithHandler(CanonicalCaughtType, Handler)); 2343c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 2344c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 2345c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl // Detect handlers for the same type as an earlier one. 2346c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (NumHandlers > 1) { 2347c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::array_pod_sort(TypesWithHandlers.begin(), TypesWithHandlers.end()); 23481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2349c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler prev = TypesWithHandlers[0]; 2350c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl for (unsigned i = 1; i < TypesWithHandlers.size(); ++i) { 2351c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler curr = TypesWithHandlers[i]; 23521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2353c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (curr == prev) { 2354c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(curr.getTypeSpecStartLoc(), 2355c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::warn_exception_caught_by_earlier_handler) 2356c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << curr.getCatchStmt()->getCaughtType().getAsString(); 2357c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(prev.getTypeSpecStartLoc(), 2358c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::note_previous_exception_handler) 2359c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << prev.getCatchStmt()->getCaughtType().getAsString(); 2360c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 23611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2362c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl prev = curr; 2363c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 23648351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 23651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2366781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 2367b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 23688351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 23698351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 23708351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 23718351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 23728351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 23738351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 23749ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(CXXTryStmt::Create(Context, TryLoc, TryBlock, 2375a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig Handlers, NumHandlers)); 23768351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 237728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 237828bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 237928bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHTryBlock(bool IsCXXTry, 238028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley SourceLocation TryLoc, 238128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *TryBlock, 238228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Handler) { 238328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(TryBlock && Handler); 238428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 238528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley getCurFunction()->setHasBranchProtectedScope(); 238628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 238728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHTryStmt::Create(Context,IsCXXTry,TryLoc,TryBlock,Handler)); 238828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 238928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 239028bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 239128bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHExceptBlock(SourceLocation Loc, 239228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Expr *FilterExpr, 239328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Block) { 239428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(FilterExpr && Block); 239528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 239628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley if(!FilterExpr->getType()->isIntegerType()) { 239758f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet return StmtError(Diag(FilterExpr->getExprLoc(), 239858f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet diag::err_filter_expression_integral) 239958f14c012e5d739b09532bb12645dc161f88cfcfFrancois Pichet << FilterExpr->getType()); 240028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley } 240128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 240228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHExceptStmt::Create(Context,Loc,FilterExpr,Block)); 240328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 240428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 240528bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 240628bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHFinallyBlock(SourceLocation Loc, 240728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Block) { 240828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(Block); 240928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHFinallyStmt::Create(Context,Loc,Block)); 241028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 2411