SemaStmt.cpp revision bebbe0d9b7568ce43a464286bee49429489ef483
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" 1851fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson#include "clang/AST/APValue.h" 19f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner#include "clang/AST/ASTContext.h" 20c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2184fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor#include "clang/AST/ExprCXX.h" 22419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner#include "clang/AST/ExprObjC.h" 2316f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtObjC.h" 2416f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtCXX.h" 25209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall#include "clang/AST/TypeLoc.h" 2684fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor#include "clang/Lex/Preprocessor.h" 276fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson#include "clang/Basic/TargetInfo.h" 28c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/STLExtras.h" 29c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/SmallVector.h" 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 31781472fe99a120098c631b0cbe33c89f8cef5e70John McCallusing namespace sema; 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::ActOnExprStmt(FullExprArg expr) { 349ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E = expr.get(); 35bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor if (!E) // FIXME: FullExprArg has no error state? 36bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor return StmtError(); 37bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor 38834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // C99 6.8.3p2: The expression in an expression statement is evaluated as a 39834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // void expression for its side effects. Conversion to void allows any 40834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // operand, even incomplete types. 41a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 42834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // Same thing in for stmt first clause (when expr) and third clause. 43a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(static_cast<Stmt*>(E)); 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4744aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios KyrtzidisStmtResult Sema::ActOnNullStmt(SourceLocation SemiLoc, bool LeadingEmptyMacro) { 4844aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis return Owned(new (Context) NullStmt(SemiLoc, LeadingEmptyMacro)); 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::ActOnDeclStmt(DeclGroupPtrTy dg, 52a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl SourceLocation StartLoc, 53a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl SourceLocation EndLoc) { 5420401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 56682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // If we have an invalid decl, just return an error. 5720401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner if (DG.isNull()) return StmtError(); 581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return Owned(new (Context) DeclStmt(DG, StartLoc, EndLoc)); 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 62a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanianvoid Sema::ActOnForEachDeclStmt(DeclGroupPtrTy dg) { 63a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 64a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian 65a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian // If we have an invalid decl, just return. 66a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian if (DG.isNull() || !DG.isSingleDecl()) return; 67a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian // suppress any potential 'unused variable' warning. 68a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian DG.getSingleDecl()->setUsed(); 69a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian} 70a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian 71636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlssonvoid Sema::DiagnoseUnusedExprResult(const Stmt *S) { 72d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis if (const LabelStmt *Label = dyn_cast_or_null<LabelStmt>(S)) 73d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis return DiagnoseUnusedExprResult(Label->getSubStmt()); 74d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis 75754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson const Expr *E = dyn_cast_or_null<Expr>(S); 76636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (!E) 77636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 78636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 7911ab79030938209f50691acae0ddb65e72a58ca9Argyrios Kyrtzidis if (E->isBoundMemberFunction(Context)) { 8011ab79030938209f50691acae0ddb65e72a58ca9Argyrios Kyrtzidis Diag(E->getLocStart(), diag::err_invalid_use_of_bound_member_func) 8111ab79030938209f50691acae0ddb65e72a58ca9Argyrios Kyrtzidis << E->getSourceRange(); 8211ab79030938209f50691acae0ddb65e72a58ca9Argyrios Kyrtzidis return; 8311ab79030938209f50691acae0ddb65e72a58ca9Argyrios Kyrtzidis } 8411ab79030938209f50691acae0ddb65e72a58ca9Argyrios Kyrtzidis 85636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceLocation Loc; 86636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceRange R1, R2; 87df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (!E->isUnusedResultAWarning(Loc, R1, R2, Context)) 88636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 90419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // Okay, we have an unused result. Depending on what the base expression is, 91419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // we might want to make a more specific diagnostic. Check for one of these 92419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // cases now. 93419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner unsigned DiagID = diag::warn_unused_expr; 944765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall if (const ExprWithCleanups *Temps = dyn_cast<ExprWithCleanups>(E)) 954dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor E = Temps->getSubExpr(); 9612f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall 97f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall E = E->IgnoreParenImpCasts(); 98bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { 990faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall if (E->getType()->isVoidType()) 1000faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall return; 1010faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall 102bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // If the callee has attribute pure, const, or warn_unused_result, warn with 103bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // a more specific message to make it clear what is happening. 104d20254f2875d0004c57ee766f258dbcee29f4841Nuno Lopes if (const Decl *FD = CE->getCalleeDecl()) { 105bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<WarnUnusedResultAttr>()) { 106bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "warn_unused_result"; 107bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 108bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 109bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<PureAttr>()) { 110bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "pure"; 111bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 112bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 113bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<ConstAttr>()) { 114bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "const"; 115bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 116bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 117bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 11812f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (const ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(E)) { 119f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian const ObjCMethodDecl *MD = ME->getMethodDecl(); 120f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian if (MD && MD->getAttr<WarnUnusedResultAttr>()) { 121f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian Diag(Loc, diag::warn_unused_call) << R1 << R2 << "warn_unused_result"; 122f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian return; 123f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 12412f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (isa<ObjCPropertyRefExpr>(E)) { 12512f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall DiagID = diag::warn_unused_property_expr; 126d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor } else if (const CXXFunctionalCastExpr *FC 127d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor = dyn_cast<CXXFunctionalCastExpr>(E)) { 128d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor if (isa<CXXConstructExpr>(FC->getSubExpr()) || 129d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor isa<CXXTemporaryObjectExpr>(FC->getSubExpr())) 130d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor return; 131f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 132209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // Diagnose "(void*) blah" as a typo for "(void) blah". 133209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall else if (const CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(E)) { 134209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall TypeSourceInfo *TI = CE->getTypeInfoAsWritten(); 135209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall QualType T = TI->getType(); 136209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 137209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // We really do want to use the non-canonical type here. 138209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall if (T == Context.VoidPtrTy) { 139209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall PointerTypeLoc TL = cast<PointerTypeLoc>(TI->getTypeLoc()); 140209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 141209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall Diag(Loc, diag::warn_unused_voidptr) 142209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall << FixItHint::CreateRemoval(TL.getStarLoc()); 143209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall return; 144209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 145209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 146209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 14735e12c90c1b107a75c5615aa76fdbd403661aaa6Douglas Gregor DiagRuntimeBehavior(Loc, PDiag(DiagID) << R1 << R2); 148636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson} 149636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 15060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1511b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 152a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 153a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 154a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 155c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 156c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 157c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus) { 158c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 159c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 160c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 161c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 162c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 163c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 164c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 165c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 166c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 1671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 168c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 1694afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 170c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 171c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 172c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 17398414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 17498414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 175636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson // Ignore statements that are last in a statement expression. 176636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (isStmtExpr && i == NumElts - 1) 17798414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 1781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 179636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson DiagnoseUnusedExprResult(Elts[i]); 18098414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 181a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 1828189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 18560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1869ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1879ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation DotDotDotLoc, Expr *RHSVal, 18824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 1899ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert((LHSVal != 0) && "missing expression in case statement"); 190117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.4.2p3: The expression shall be an integer constant. 1921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // However, GCC allows any evaluatable integer expression. 1931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!LHSVal->isTypeDependent() && !LHSVal->isValueDependent() && 194dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(LHSVal)) 19524e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1976c36be5b383875b490684bcf439d6d427298c1afChris Lattner // GCC extension: The expression shall be an integer constant. 198117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 199dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (RHSVal && !RHSVal->isTypeDependent() && !RHSVal->isValueDependent() && 200dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(RHSVal)) { 201f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner RHSVal = 0; // Recover by just forgetting about it. 202117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl } 203117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 204781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 2058a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner Diag(CaseLoc, diag::err_case_not_in_switch); 20624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 2078a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 209dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc, DotDotDotLoc, 210dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ColonLoc); 211781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(CS); 212117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 21524e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 2169ae2f076ca5ab1feb3ba95629099ec2319833701John McCallvoid Sema::ActOnCaseStmtBody(Stmt *caseStmt, Stmt *SubStmt) { 21724e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 21824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 21924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 22024e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 22160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2221eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 2239ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SubStmt, Scope *CurScope) { 224781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 2250fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 226117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 2270fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 228117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 229dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, ColonLoc, SubStmt); 230781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(DS); 231117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 23460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2351b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II, 2361a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis SourceLocation ColonLoc, Stmt *SubStmt, 2371a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis const AttributeList *Attr) { 2381a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis // According to GCC docs, "the only attribute that makes sense after a label 2391a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis // is 'unused'". 2401a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis bool HasUnusedAttr = false; 2418113ecfa4e41e2c888b1794389dfe3bce6386493Ted Kremenek for ( ; Attr; Attr = Attr->getNext()) { 2428113ecfa4e41e2c888b1794389dfe3bce6386493Ted Kremenek if (Attr->getKind() == AttributeList::AT_unused) { 2431a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis HasUnusedAttr = true; 2441a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis } else { 2458113ecfa4e41e2c888b1794389dfe3bce6386493Ted Kremenek Diag(Attr->getLoc(), diag::warn_label_attribute_not_unused); 2468113ecfa4e41e2c888b1794389dfe3bce6386493Ted Kremenek Attr->setInvalid(true); 2471a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis } 2481a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis } 2491a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis 2501a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis return ActOnLabelStmt(IdentLoc, II, ColonLoc, SubStmt, HasUnusedAttr); 2511a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis} 2521a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis 2531a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios KyrtzidisStmtResult 2541a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios KyrtzidisSema::ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II, 2551a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis SourceLocation ColonLoc, Stmt *SubStmt, 2561a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis bool HasUnusedAttr) { 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 258781472fe99a120098c631b0cbe33c89f8cef5e70John McCall LabelStmt *&LabelDecl = getCurFunction()->LabelMap[II]; 259de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If not forward referenced or defined already, just create a new LabelStmt. 261caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff if (LabelDecl == 0) 2621a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis return Owned(LabelDecl = new (Context) LabelStmt(IdentLoc, II, SubStmt, 2631a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis HasUnusedAttr)); 264de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(LabelDecl->getID() == II && "Label mismatch!"); 266de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was either forward reference or multiply defined. If 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // multiply defined, reject it now. 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LabelDecl->getSubStmt()) { 27008631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << LabelDecl->getID(); 2715f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(LabelDecl->getIdentLoc(), diag::note_previous_definition); 272de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 274de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was forward declared, and we just found its real 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // definition. Fill in the forward definition and return it. 2775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelDecl->setIdentLoc(IdentLoc); 2780fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner LabelDecl->setSubStmt(SubStmt); 2791a18600b85aaa691122983dd8dcf4225cfc9ef68Argyrios Kyrtzidis LabelDecl->setUnusedAttribute(HasUnusedAttr); 280de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(LabelDecl); 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 28360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 284d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, Decl *CondVar, 28544aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *thenStmt, SourceLocation ElseLoc, 28644aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *elseStmt) { 28760d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(CondVal.release()); 2881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2898cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor VarDecl *ConditionVar = 0; 290d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 291d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 292586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, IfLoc, true); 29399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 29499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 2958cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor } 29699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 29799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 29899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 2998cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor 300754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(thenStmt); 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3022d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 3032d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 3042d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 3052d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 306b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek // 3079ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!elseStmt) { 3082d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 309a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // But do not warn if the body is a macro that expands to nothing, e.g: 310a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 311a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // #define CALL(x) 312a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // if (condition) 313a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // CALL(0); 314a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 31544aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis if (!stmt->hasLeadingEmptyMacro()) 316b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 3172d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 3182d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 319754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(elseStmt); 3201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 32143dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor return Owned(new (Context) IfStmt(Context, IfLoc, ConditionVar, ConditionExpr, 32244aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis thenStmt, ElseLoc, elseStmt)); 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 325f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 326f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 327f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 328f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 329f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 3301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, 331f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 332f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 333f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 334f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 3359f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(NewWidth); 336f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 337f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor 338f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // If the input was signed and negative and the output is 339f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // unsigned, don't bother to warn: this is implementation-defined 340f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // behavior. 341f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 342f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 343f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 344f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 3459f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.trunc(NewWidth); 346b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 3479f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.extend(Val.getBitWidth()); 348b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 349f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 350d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 3511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 352f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 353f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 3549f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(NewWidth); 355b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 356f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 357f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 358f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 3592853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // We don't diagnose this overflow, because it is implementation-defined 3602853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // behavior. 3612853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 362f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 363f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 364f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 365f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 366f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3670471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3680471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3690471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3700471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3710471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3720471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3730e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3740e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3750e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3760e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3770471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3780471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3790471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3800471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3810471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3820471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3830471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 384764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 385764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 386764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 387764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 388764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 389764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 390764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 391764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 392764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 393764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 394764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 395764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 396764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 397764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 398ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// CmpEnumVals - Comparison predicate for sorting enumeration values. 399ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 400ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool CmpEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 401ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 402ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 403ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first < rhs.first; 404ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 405ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 406ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// EqEnumVals - Comparison preficate for uniqing enumeration values. 407ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 408ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool EqEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 409ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 410ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 411ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first == rhs.first; 412ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 413ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 4145f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// GetTypeBeforeIntegralPromotion - Returns the pre-promotion type of 4155f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// potentially integral-promoted expression @p expr. 4165f04881eb025f61396d0555d8173730fe2759e0aChris Lattnerstatic QualType GetTypeBeforeIntegralPromotion(const Expr* expr) { 4176907fbe758d23e1aec4c0a67e7b633d1d855feb4John McCall if (const CastExpr *ImplicitCast = dyn_cast<ImplicitCastExpr>(expr)) { 4185f04881eb025f61396d0555d8173730fe2759e0aChris Lattner const Expr *ExprBeforePromotion = ImplicitCast->getSubExpr(); 4195f04881eb025f61396d0555d8173730fe2759e0aChris Lattner QualType TypeBeforePromotion = ExprBeforePromotion->getType(); 4202ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (TypeBeforePromotion->isIntegralOrEnumerationType()) { 4215f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return TypeBeforePromotion; 4225f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 4235f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 4245f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return expr->getType(); 4255f04881eb025f61396d0555d8173730fe2759e0aChris Lattner} 4265f04881eb025f61396d0555d8173730fe2759e0aChris Lattner 42760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 4289ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, Expr *Cond, 429d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall Decl *CondVar) { 43060d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult; 4319ae2f076ca5ab1feb3ba95629099ec2319833701John McCall 432586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor VarDecl *ConditionVar = 0; 433d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 434d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 4359ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult = CheckConditionVariable(ConditionVar, SourceLocation(), false); 4369ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 437586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 438eecf38f821fe8e113722096b77da7d68b26d28d1Douglas Gregor 4399ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.release(); 440586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 441586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor 4429ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Cond) 443586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 444586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor 4459ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult 4469ae2f076ca5ab1feb3ba95629099ec2319833701John McCall = ConvertToIntegralOrEnumerationType(SwitchLoc, Cond, 447c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_typecheck_statement_requires_integer), 448c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_incomplete_class_type) 4499ae2f076ca5ab1feb3ba95629099ec2319833701John McCall << Cond->getSourceRange(), 450c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_explicit_conversion), 451c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::note_switch_conversion), 452c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_multiple_conversions), 4536bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(diag::note_switch_conversion), 4546bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(0)); 4559ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) return StmtError(); 4569ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 457c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor 458d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (!CondVar) { 459b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, SwitchLoc); 4604765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall CondResult = MaybeCreateExprWithCleanups(Cond); 4619ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 462586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 4639ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 464586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 465b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 466781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchIntoScope(); 467586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor 4689ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = new (Context) SwitchStmt(Context, ConditionVar, Cond); 469781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.push_back(SS); 470586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return Owned(SS); 4717e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner} 4727e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner 47328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greifstatic void AdjustAPSInt(llvm::APSInt &Val, unsigned BitWidth, bool IsSigned) { 47428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif if (Val.getBitWidth() < BitWidth) 4759f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(BitWidth); 47628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif else if (Val.getBitWidth() > BitWidth) 4779f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(BitWidth); 47828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Val.setIsSigned(IsSigned); 47928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif} 48028164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif 48160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 4829ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, Stmt *Switch, 4839ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *BodyStmt) { 4849ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = cast<SwitchStmt>(Switch); 485781472fe99a120098c631b0cbe33c89f8cef5e70John McCall assert(SS == getCurFunction()->SwitchStack.back() && 486781472fe99a120098c631b0cbe33c89f8cef5e70John McCall "switch stack missing push/pop!"); 487de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 4889dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 489781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.pop_back(); 490c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 491ff331c15729f7d4439d253c97f4d60f2a7ffd0c6Douglas Gregor if (SS->getCond() == 0) 492be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor return StmtError(); 493be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor 494f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 4950fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr *CondExprBeforePromotion = CondExpr; 49684fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor QualType CondTypeBeforePromotion = 49784fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor GetTypeBeforeIntegralPromotion(CondExpr); 498de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 4990de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 5000de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor UsualUnaryConversions(CondExpr); 501a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor QualType CondType = CondExpr->getType(); 50284fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor SS->setCond(CondExpr); 50384fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor 5045f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // C++ 6.4.2.p2: 5055f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // Integral promotions are performed (on the switch condition). 5065f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // 5075f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // A case value unrepresentable by the original switch condition 5085f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // type (before the promotion) doesn't make sense, even when it can 5095f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // be represented by the promoted type. Therefore we need to find 5105f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // the pre-promotion type of the switch condition. 51112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondExpr->isTypeDependent()) { 512acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // We have already converted the expression to an integral or enumeration 513acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // type, when we started the switch statement. If we don't have an 514acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // appropriate type now, just return an error. 515acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor if (!CondType->isIntegralOrEnumerationType()) 51612356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan return StmtError(); 51712356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan 5182b334bb3126a67895813e49e6228dad4aec0b4d6Chris Lattner if (CondExpr->isKnownToHaveBooleanValue()) { 51912356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(bool_expr) {...} is often a programmer error, e.g. 52012356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(n && mask) { ... } // Doh - should be "n & mask". 52112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // One can always use an if statement instead of switch(bool_expr). 52212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::warn_bool_switch_condition) 52312356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondExpr->getSourceRange(); 52412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 525c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 526de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 527f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 528f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 5291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HasDependentValue 530dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 5311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned CondWidth 532dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = HasDependentValue? 0 5335f04881eb025f61396d0555d8173730fe2759e0aChris Lattner : static_cast<unsigned>(Context.getTypeSize(CondTypeBeforePromotion)); 5345f04881eb025f61396d0555d8173730fe2759e0aChris Lattner bool CondIsSigned = CondTypeBeforePromotion->isSignedIntegerType(); 5351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 536f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 537f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 538f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 5390471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner typedef llvm::SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 5400471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 5411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 542f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 543ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRangesTy; 544ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy CaseRanges; 5451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 546f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 5471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 548b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 5491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 550dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 551c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 5521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 553c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 554f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 555f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 5565f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 557de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 558f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 559390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 560390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 561390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 562b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 563c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 564f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 5651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 566f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 567f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 5681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 569f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 570f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 5711e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 572dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 573dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 574dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 575dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 576dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 5771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 57851fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 5791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 580f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 581f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 58228164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Lo->getLocStart(), 583f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 5846c36be5b383875b490684bcf439d6d427298c1afChris Lattner 5851e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 5861e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 5872de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall ImpCastExprToType(Lo, CondType, CK_IntegralCast); 5881e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 5891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 590b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 591dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 5921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CS->getRHS()->isTypeDependent() || 593dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 594dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 595dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 596dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 597f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 5981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 599b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 600f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 601f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 602b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 603dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 6040fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // If we don't have a default statement, check whether the 6050fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // condition is constant. 6060fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt ConstantCondValue; 6070fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool HasConstantCond = false; 6080fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool ShouldCheckConstantCond = false; 6090fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!HasDependentValue && !TheDefaultStmt) { 6100fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr::EvalResult Result; 6110fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall HasConstantCond = CondExprBeforePromotion->Evaluate(Result, Context); 6120fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (HasConstantCond) { 6130fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(Result.Val.isInt() && "switch condition evaluated to non-int"); 6140fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue = Result.Val.getInt(); 6150fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = true; 6160fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6170fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(ConstantCondValue.getBitWidth() == CondWidth && 6180fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue.isSigned() == CondIsSigned); 6190fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 6200fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 6210fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 622dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 623dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 624dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 625dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 6260fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (unsigned i = 0, e = CaseVals.size(); i != e; ++i) { 6270fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 6280fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CaseVals[i].first == ConstantCondValue) 6290fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6300fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6310fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (i != 0 && CaseVals[i].first == CaseVals[i-1].first) { 632dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 6331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(CaseVals[i].second->getLHS()->getLocStart(), 6340fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall diag::err_duplicate_case) << CaseVals[i].first.toString(10); 6350fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CaseVals[i-1].second->getLHS()->getLocStart(), 636dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 637390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 638390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 639dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 640dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6416efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 642b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 6431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 644dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 645dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 646dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 647dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 648dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 649dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 6501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 651dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 652dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 653dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 6540fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt &LoVal = CaseRanges[i].first; 655dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 656dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 657dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 6581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 659dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 660dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 66128164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocStart(), 662dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 6631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 664dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the LHS is not the same type as the condition, insert an implicit 665dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // cast. 6662de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall ImpCastExprToType(Hi, CondType, CK_IntegralCast); 667dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 6681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 669dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 6700fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (LoVal > HiVal) { 671dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 672dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 67328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocEnd()); 674dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 675dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 676dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 677dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6780fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6790fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 6800fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall LoVal <= ConstantCondValue && 6810fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue <= HiVal) 6820fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6830fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 684dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 6850471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 6861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 687dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 688dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 689dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 690dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 691dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 692dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 693dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 6941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 695dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 696dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 697dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 698dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 6991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 700dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 701dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 702dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 703dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 704dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 705dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 706dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 707dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 708dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 710dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 711dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 712dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 713dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 714dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 715dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 717dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 718dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 719dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 720dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 721dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 722dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 724dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 725dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 726dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 727dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 7281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(OverlapStmt->getLHS()->getLocStart(), 729dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 730390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 731390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 732dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 733dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7340471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 735b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 736ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7370fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Complain if we have a constant condition and we didn't find a match. 7380fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!CaseListIsErroneous && ShouldCheckConstantCond) { 7390fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // TODO: it would be nice if we printed enums as enums, chars as 7400fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // chars, etc. 7410fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CondExpr->getExprLoc(), diag::warn_missing_case_for_condition) 7420fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ConstantCondValue.toString(10) 7430fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << CondExpr->getSourceRange(); 7440fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 7450fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7460fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Check to see if switch is over an Enum and handles all of its 747559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // values. We only issue a warning if there is not 'default:', but 748559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // we still do the analysis to preserve this information in the AST 749559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // (which can be used by flow-based analyes). 7500fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // 751ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner const EnumType *ET = CondTypeBeforePromotion->getAs<EnumType>(); 752559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 753ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // If switch has default case, then ignore it. 754559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!CaseListIsErroneous && !HasConstantCond && ET) { 755ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const EnumDecl *ED = ET->getDecl(); 756ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef llvm::SmallVector<std::pair<llvm::APSInt, EnumConstantDecl*>, 64> EnumValsTy; 757ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy EnumVals; 758ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7590fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Gather all enum values, set their type and sort them, 7600fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // allowing easier comparison with CaseVals. 7610fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (EnumDecl::enumerator_iterator EDI = ED->enumerator_begin(); 76228164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EDI != ED->enumerator_end(); ++EDI) { 76328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif llvm::APSInt Val = EDI->getInitVal(); 76428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Val, CondWidth, CondIsSigned); 76528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EnumVals.push_back(std::make_pair(Val, *EDI)); 766ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 767ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor std::stable_sort(EnumVals.begin(), EnumVals.end(), CmpEnumVals); 7680fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall EnumValsTy::iterator EIend = 7690fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall std::unique(EnumVals.begin(), EnumVals.end(), EqEnumVals); 770559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 771559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // See which case values aren't in enum. 772559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // TODO: we might want to check whether case values are out of the 773559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // enum even if we don't want to check whether all cases are handled. 774559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!TheDefaultStmt) { 77547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EnumValsTy::const_iterator EI = EnumVals.begin(); 77647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseValsTy::const_iterator CI = CaseVals.begin(); 7770fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CI != CaseVals.end(); CI++) { 77847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < CI->first) 77947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 78047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first > CI->first) 7810fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 7820fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ED->getDeclName(); 78347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 78447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek // See which of case ranges aren't in enum 78547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI = EnumVals.begin(); 78647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseRangesTy::const_iterator RI = CaseRanges.begin(); 7870fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall RI != CaseRanges.end() && EI != EIend; RI++) { 78847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < RI->first) 78947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 790ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 79147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != RI->first) { 79247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 79347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 79447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 795e0ba9d1beeba01a96808c2fc61f9ca89acec313bTed Kremenek 79647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 79728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 79847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < Hi) 79947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 80047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != Hi) 80147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getRHS()->getExprLoc(), diag::warn_not_in_enum) 80247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 80347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 804ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 805ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner 806559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Check which enum vals aren't in switch 807ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseValsTy::const_iterator CI = CaseVals.begin(); 808ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy::const_iterator RI = CaseRanges.begin(); 809559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek bool hasCasesNotInSwitch = false; 810559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 811ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner llvm::SmallVector<DeclarationName,8> UnhandledNames; 812ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner 813559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek for (EnumValsTy::const_iterator EI = EnumVals.begin(); EI != EIend; EI++){ 814ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Drop unneeded case values 815ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt CIVal; 816ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (CI != CaseVals.end() && CI->first < EI->first) 817ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CI++; 818ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 819ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (CI != CaseVals.end() && CI->first == EI->first) 820ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor continue; 821ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 822559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Drop unneeded case ranges 823ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (; RI != CaseRanges.end(); RI++) { 824ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 82528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 826ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI->first <= Hi) 827ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor break; 828ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 829ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 830559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (RI == CaseRanges.end() || EI->first < RI->first) { 83147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek hasCasesNotInSwitch = true; 83247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (!TheDefaultStmt) 833ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner UnhandledNames.push_back(EI->second->getDeclName()); 83447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 835ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 836ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner 837ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Produce a nice diagnostic if multiple values aren't handled. 838ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner switch (UnhandledNames.size()) { 839ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 0: break; 840ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 1: 841ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case1) 842ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0]; 843ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 844ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 2: 845ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case2) 846ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1]; 847ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 848ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 3: 849ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case3) 850ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 851ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 852ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner default: 853ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_cases) 854ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << (unsigned)UnhandledNames.size() 855ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 856ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 857ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner } 858559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 859559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!hasCasesNotInSwitch) 86047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek SS->setAllEnumCasesCovered(); 861ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 862b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 863dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 864390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 865390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 866b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 867de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 868de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 869de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 8705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 87260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 87399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas GregorSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, 8749ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Decl *CondVar, Stmt *Body) { 87560d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(Cond.release()); 87699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 8775656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor VarDecl *ConditionVar = 0; 878d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 879d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 880586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, WhileLoc, true); 88199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 88299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 8835656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor } 8849ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *ConditionExpr = CondResult.take(); 88599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 88699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 88799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 8889ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 8891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 89043dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor return Owned(new (Context) WhileStmt(Context, ConditionVar, ConditionExpr, 8919ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Body, WhileLoc)); 8925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 89460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 8959ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 896989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 8979ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Cond, SourceLocation CondRParen) { 8989ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert(Cond && "ActOnDoStmt(): missing expression"); 899f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 9009ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CheckBooleanCondition(Cond, DoLoc)) 9015a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 9025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 903b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, DoLoc); 9044765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall ExprResult CondResult = MaybeCreateExprWithCleanups(Cond); 9059ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 906586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 9079ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 908586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor 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 } 94499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 94599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Third = third.release().takeAs<Expr>(); 94699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 9473af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(First); 9483af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(Third); 949754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(Body); 950754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 95143dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor return Owned(new (Context) ForStmt(Context, First, 9529ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SecondResult.take(), ConditionVar, 95343dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor 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 96860d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 969f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 970f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 9719ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, Expr *Second, 9729ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 97320552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 97420552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 97520552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 9767e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 977f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 978f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 979f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 9807e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner Decl *D = DS->getSingleDecl(); 981f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek FirstType = cast<ValueDecl>(D)->getType(); 982f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 983f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 984f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 985248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff VarDecl *VD = cast<VarDecl>(D); 986b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD->isLocalVarDecl() && !VD->hasLocalStorage()) 987f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(VD->getLocation(), 988f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 9891fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 990c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor Expr *FirstE = cast<Expr>(First); 9917eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (!FirstE->isTypeDependent() && !FirstE->isLValue()) 992f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 993f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 994f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 9951fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 9961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FirstType = static_cast<Expr*>(First)->getType(); 9971fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 998c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (!FirstType->isDependentType() && 999c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor !FirstType->isObjCObjectPointerType() && 1000a5e42a82ce055f29f3733f3a1f10da6cb9877deeFariborz Jahanian !FirstType->isBlockPointerType()) 1001dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 1002d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 10033ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 1004c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (Second && !Second->isTypeDependent()) { 1005a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(Second); 10063ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian QualType SecondType = Second->getType(); 1007f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!SecondType->isObjCObjectPointerType()) 1008dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_collection_expr_type) 1009d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 1010ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian else if (const ObjCObjectPointerType *OPT = 1011ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian SecondType->getAsObjCInterfacePointerType()) { 1012ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian llvm::SmallVector<IdentifierInfo *, 4> KeyIdents; 1013ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian IdentifierInfo* selIdent = 1014ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian &Context.Idents.get("countByEnumeratingWithState"); 1015ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 1016ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian selIdent = &Context.Idents.get("objects"); 1017ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 1018ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian selIdent = &Context.Idents.get("count"); 1019ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 1020ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian Selector CSelector = Context.Selectors.getSelector(3, &KeyIdents[0]); 1021ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian if (ObjCInterfaceDecl *IDecl = OPT->getInterfaceDecl()) { 1022ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian if (!IDecl->isForwardDecl() && 1023ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian !IDecl->lookupInstanceMethod(CSelector)) { 102480a785c2452c73b7c41d4a867edcf5a090c78c46Fariborz Jahanian // Must further look into private implementation methods. 1025ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian if (!LookupPrivateInstanceMethod(CSelector, IDecl)) 1026ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian Diag(ForLoc, diag::warn_collection_expr_type) 1027ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian << SecondType << CSelector << Second->getSourceRange(); 1028ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 1029ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 1030ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 10313ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 10328189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 10338189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 10343ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 10355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 103660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 10371b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnGotoStmt(SourceLocation GotoLoc, SourceLocation LabelLoc, 10385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *LabelII) { 10395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 1040781472fe99a120098c631b0cbe33c89f8cef5e70John McCall LabelStmt *&LabelDecl = getCurFunction()->LabelMap[LabelII]; 10415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1042781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchIntoScope(); 1043b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 1044caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff // If we haven't seen this label yet, create a forward reference. 1045caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff if (LabelDecl == 0) 10468189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek LabelDecl = new (Context) LabelStmt(LabelLoc, LabelII, 0); 10474cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1048355a9fe26a6dec89680ddf713dd5bc7a671b298aArgyrios Kyrtzidis LabelDecl->setUsed(); 10498189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) GotoStmt(LabelDecl, GotoLoc, LabelLoc)); 10505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 105260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1053ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 10549ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E) { 1055bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 10565f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 10575f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 10582877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth QualType DestTy = Context.getPointerType(Context.VoidTy.withConst()); 10595f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 10602877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth CheckSingleAssignmentConstraints(DestTy, E); 10612877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth if (DiagnoseAssignmentResult(ConvTy, StarLoc, DestTy, ETy, E, AA_Passing)) 10625f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 10635f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 1064b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 1065781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasIndirectGoto(); 1066b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 10675f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 10685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 107060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 10711b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 10725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 10735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 10745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 10754cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 10765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10774cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10788189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 10795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 108160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 10821b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 10835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 10845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 10855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 10864cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 10875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10884cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10898189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 10905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10925077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \brief Determine whether a return statement is a candidate for the named 10935077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// return value optimization (C++0x 12.8p34, bullet 1). 10945077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 10955077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \param Ctx The context in which the return expression and type occur. 10965077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 10975077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \param RetType The return type of the function or block. 10985077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 10995077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \param RetExpr The expression being returned from the function or block. 11005077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 11015077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \returns The NRVO candidate variable, if the return statement may use the 11025077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// NRVO, or NULL if there is no such candidate. 11035077c3876beeaed32280af88244e8050078619a8Douglas Gregorstatic const VarDecl *getNRVOCandidate(ASTContext &Ctx, QualType RetType, 11045077c3876beeaed32280af88244e8050078619a8Douglas Gregor Expr *RetExpr) { 11053c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor QualType ExprType = RetExpr->getType(); 11063c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // - in a return statement in a function with ... 11073c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // ... a class return type ... 11083c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!RetType->isRecordType()) 11095077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 11103c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // ... the same cv-unqualified type as the function return type ... 11113c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!Ctx.hasSameUnqualifiedType(RetType, ExprType)) 11125077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 11133c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // ... the expression is the name of a non-volatile automatic object ... 11143c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // We ignore parentheses here. 11153c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // FIXME: Is this compliant? (Everyone else does it) 11163c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(RetExpr->IgnoreParens()); 11173c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!DR) 11185077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 11193c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 11203c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!VD) 11215077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 11225077c3876beeaed32280af88244e8050078619a8Douglas Gregor 11235077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (VD->getKind() == Decl::Var && VD->hasLocalStorage() && 1124d86c477fb5d3fc34864afecbbb5443da9355e8fbDouglas Gregor !VD->getType()->isReferenceType() && !VD->hasAttr<BlocksAttr>() && 1125d86c477fb5d3fc34864afecbbb5443da9355e8fbDouglas Gregor !VD->getType().isVolatileQualified()) 11265077c3876beeaed32280af88244e8050078619a8Douglas Gregor return VD; 11275077c3876beeaed32280af88244e8050078619a8Douglas Gregor 11285077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 11293c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor} 11303c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor 113127c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 11324eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 113360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 11344eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 11354eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 11364eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 11379ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor BlockScopeInfo *CurBlock = getCurBlock(); 11387d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CurBlock->ReturnType.isNull()) { 1139c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 114016564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 114116564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 1142a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(RetValExp); 11437d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = RetValExp->getType(); 11447d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(RetValExp)) { 11457d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // We have to remove a 'const' added to copied-in variable which was 11467d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // part of the implementation spec. and not the actual qualifier for 11477d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // the variable. 11487d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CDRE->isConstQualAdded()) 114949f4e1cbd839da27ff4814b4ea6d85a79f786cbdJohn McCall CurBlock->ReturnType.removeLocalConst(); // FIXME: local??? 11507d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian } 1151c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 11527d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = Context.VoidTy; 11534eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 11547d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian QualType FnRetType = CurBlock->ReturnType; 11554cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 115640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (CurBlock->TheDecl->hasAttr<NoReturnAttr>()) { 11576c92fa75e62937f9738696840efcb258560f4568Mike Stump Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr) 11586c92fa75e62937f9738696840efcb258560f4568Mike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 11596c92fa75e62937f9738696840efcb258560f4568Mike Stump return StmtError(); 11606c92fa75e62937f9738696840efcb258560f4568Mike Stump } 11616c92fa75e62937f9738696840efcb258560f4568Mike Stump 11624eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 11634eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 11644eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 11655077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 11664eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 11674eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) { 11684eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 11694eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 11704eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 11715077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 11725077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp) { 11734cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 11745077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 11755077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 11765077c3876beeaed32280af88244e8050078619a8Douglas Gregor 11775077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 11785077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void block with an expression, continue checking 11795077c3876beeaed32280af88244e8050078619a8Douglas Gregor 11805077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 11815077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 11825077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 11835077c3876beeaed32280af88244e8050078619a8Douglas Gregor 11845077c3876beeaed32280af88244e8050078619a8Douglas Gregor // In C++ the return statement is handled via a copy initialization. 11855077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 11865077c3876beeaed32280af88244e8050078619a8Douglas Gregor NRVOCandidate = getNRVOCandidate(Context, FnRetType, RetValExp); 118760d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult Res = PerformCopyInitialization( 11885077c3876beeaed32280af88244e8050078619a8Douglas Gregor InitializedEntity::InitializeResult(ReturnLoc, 11895077c3876beeaed32280af88244e8050078619a8Douglas Gregor FnRetType, 11905077c3876beeaed32280af88244e8050078619a8Douglas Gregor NRVOCandidate != 0), 11915077c3876beeaed32280af88244e8050078619a8Douglas Gregor SourceLocation(), 11925077c3876beeaed32280af88244e8050078619a8Douglas Gregor Owned(RetValExp)); 11935077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 11945077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 11955077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 11965077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 11975077c3876beeaed32280af88244e8050078619a8Douglas Gregor 1198b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1199b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 12004765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1201b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 12024cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 12035077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 12045077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (RetValExp) 12055077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 1206c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson } 1207c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson 12085077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 120998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 12104cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 12115077c3876beeaed32280af88244e8050078619a8Douglas Gregor // If we need to check for the named return value optimization, save the 12125077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 12135077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 12145077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 12155077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 12165077c3876beeaed32280af88244e8050078619a8Douglas Gregor 12175077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 12184eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 12195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 122060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 12219ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 12229ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor if (getCurBlock()) 12234eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 12244cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1225371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 1226f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 1227371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 122804a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall if (FD->hasAttr<NoReturnAttr>() || 122904a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall FD->getType()->getAs<FunctionType>()->getNoReturnAttr()) 12308662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 1231f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 1232f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump } else if (ObjCMethodDecl *MD = getCurMethodDecl()) 1233c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff FnRetType = MD->getResultType(); 1234c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff else // If we don't have a function/method context, bail. 1235c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 12361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12375077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 12385cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 12391be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor if (RetValExp && !RetValExp->isTypeDependent()) { 12401be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor // C99 6.8.6.4p1 (ext_ since GCC warns) 124165ce04bef06696379682410f399f37b43996d824Chris Lattner unsigned D = diag::ext_return_has_expr; 124265ce04bef06696379682410f399f37b43996d824Chris Lattner if (RetValExp->getType()->isVoidType()) 124365ce04bef06696379682410f399f37b43996d824Chris Lattner D = diag::ext_return_has_void_expr; 1244f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall else { 1245f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall IgnoredValueConversions(RetValExp); 1246f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall ImpCastExprToType(RetValExp, Context.VoidTy, CK_ToVoid); 1247f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall } 12484cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1249e878eb035b343d7d819c092102364ec9849716aeChris Lattner // return (some void expression); is legal in C++. 1250e878eb035b343d7d819c092102364ec9849716aeChris Lattner if (D != diag::ext_return_has_void_expr || 1251e878eb035b343d7d819c092102364ec9849716aeChris Lattner !getLangOptions().CPlusPlus) { 1252e878eb035b343d7d819c092102364ec9849716aeChris Lattner NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 1253e878eb035b343d7d819c092102364ec9849716aeChris Lattner Diag(ReturnLoc, D) 1254e878eb035b343d7d819c092102364ec9849716aeChris Lattner << CurDecl->getDeclName() << isa<ObjCMethodDecl>(CurDecl) 1255e878eb035b343d7d819c092102364ec9849716aeChris Lattner << RetValExp->getSourceRange(); 1256e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 12571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1258b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 12594765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 12605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 12615077c3876beeaed32280af88244e8050078619a8Douglas Gregor 12625077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 12635077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp && !FnRetType->isDependentType()) { 12643c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 12653c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 12663c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 12673c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 12683c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 126908631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 12703c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 127108631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 12725077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc); 12735077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 12745077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 12755077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 12765077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void function with an expression, continue checking 12775077c3876beeaed32280af88244e8050078619a8Douglas Gregor 12785077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 12795077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 12805077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 12815077c3876beeaed32280af88244e8050078619a8Douglas Gregor 12825077c3876beeaed32280af88244e8050078619a8Douglas Gregor // In C++ the return statement is handled via a copy initialization. 12835077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 12845077c3876beeaed32280af88244e8050078619a8Douglas Gregor NRVOCandidate = getNRVOCandidate(Context, FnRetType, RetValExp); 128560d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult Res = PerformCopyInitialization( 12865077c3876beeaed32280af88244e8050078619a8Douglas Gregor InitializedEntity::InitializeResult(ReturnLoc, 12875077c3876beeaed32280af88244e8050078619a8Douglas Gregor FnRetType, 12885077c3876beeaed32280af88244e8050078619a8Douglas Gregor NRVOCandidate != 0), 12895077c3876beeaed32280af88244e8050078619a8Douglas Gregor SourceLocation(), 12905077c3876beeaed32280af88244e8050078619a8Douglas Gregor Owned(RetValExp)); 12915077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 12925077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 12935077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 12945077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 12954cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 12965077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 12975077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (RetValExp) 12985077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 129966724ea67d7d598b937d86fa66f03f09a1c758f3Douglas Gregor } 13005077c3876beeaed32280af88244e8050078619a8Douglas Gregor 1301b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1302b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 13034765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1304b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 13055077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 1306898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 13075077c3876beeaed32280af88244e8050078619a8Douglas Gregor 13085077c3876beeaed32280af88244e8050078619a8Douglas Gregor // If we need to check for the named return value optimization, save the 13095077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 13105077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 13115077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 13125077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 13135077c3876beeaed32280af88244e8050078619a8Douglas Gregor 13145077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 13155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 13165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1317810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 1318810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 1319810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 1320810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 1321810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 1322810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 1323810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 1324810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 1325703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson // Type dependent expressions will be checked during instantiation. 1326703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson if (E->isTypeDependent()) 1327703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson return false; 1328703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson 13297eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E->isLValue()) 1330810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 1331810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1332810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 1333810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 1334810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 13357eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E != E2 && E2->isLValue()) { 1336810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (!S.getLangOptions().HeinousExtensions) 1337810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 1338810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1339810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 1340810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 1341810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1342810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 1343810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 1344810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 1345810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1346810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 1347810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 1348810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 1349810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1350810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 135160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, 13523037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsSimple, 13533037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsVolatile, 13543037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumOutputs, 13553037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumInputs, 1356ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson IdentifierInfo **Names, 13573037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg constraints, 13583037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg exprs, 13599ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *asmString, 13603037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg clobbers, 13613b11fd3b52e7b88233c602407c151d07cb093e75Mike Stump SourceLocation RParenLoc, 13623b11fd3b52e7b88233c602407c151d07cb093e75Mike Stump bool MSAsm) { 13633037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 13643037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 13653037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 13669ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr **Exprs = exprs.get(); 13679ae2f076ca5ab1feb3ba95629099ec2319833701John McCall StringLiteral *AsmString = cast<StringLiteral>(asmString); 13683037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 13693037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 137003eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson llvm::SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 13711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13721708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 13736bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (AsmString->isWide()) 13743037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 13753037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 13763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 13771708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 13781708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 13796bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 13803037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 13813037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 13823037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1383ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef OutputName; 1384ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1385ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson OutputName = Names[i]->getName(); 1386ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1387ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 1388432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner if (!Context.Target.validateOutputConstraint(Info)) 13893037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1390432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 1391432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 13923037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1393d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 139472056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 1395810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 139672056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 1397dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 139872056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 139904728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 14001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 140144def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 140204728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 14033037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1404806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner llvm::SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 1405806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 140604728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 14071708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 14086bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 14093037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 14103037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 14113037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1412ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef InputName; 1413ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1414ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson InputName = Names[i]->getName(); 1415ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1416ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 1417beaaccd8e2a8748f77b66e2b330fb9136937e14cJay Foad if (!Context.Target.validateInputConstraint(OutputConstraintInfos.data(), 14182819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 14193037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1420432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 1421432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 1422d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 14233037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 142472056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 14253037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1426d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 142744def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 1428810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 142972056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1430d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 1431432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 143272056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 143304728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 14343037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 143544def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 1436d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 143772056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1438d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 14391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump << InputExpr->getType() << Info.getConstraintStr() 144072056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 1441d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 1442d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 14431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1444a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(Exprs[i]); 14451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1446806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 144704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 14483037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 14496fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 14501708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 14511708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 14526bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 14533037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 14543037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 14553037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1456fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson llvm::StringRef Clobber = Literal->getString(); 14573037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1458fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson if (!Context.Target.isValidGCCRegisterName(Clobber)) 14593037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 14607765934ad7e157b5fcf925792a38e01b1edbcf8aDaniel Dunbar diag::err_asm_unknown_register_name) << Clobber); 14616fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 14623037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1463fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 1464966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm, 1465966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson NumOutputs, NumInputs, Names, Constraints, Exprs, 1466966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson AsmString, NumClobbers, Clobbers, RParenLoc); 1467fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 1468fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 1469fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner llvm::SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 1470fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 1471fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 14722ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 14732ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 1474fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 1475fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 14761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1477806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 1478806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 1479806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 14801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1481806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 1482806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 1483806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 1484806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 14851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1486806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 1487f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 1488c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Expr *InputExpr = Exprs[i+NumOutputs]; 14897adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 14907adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 14917adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 1492806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 14931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1494aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // Decide if the input and output are in the same domain (integer/ptr or 1495aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // floating point. 1496aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner enum AsmDomain { 1497aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner AD_Int, AD_FP, AD_Other 1498aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner } InputDomain, OutputDomain; 1499aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner 1500aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (InTy->isIntegerType() || InTy->isPointerType()) 1501aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Int; 15020c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (InTy->isRealFloatingType()) 1503aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_FP; 1504aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 1505aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Other; 15063351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 1507aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutTy->isIntegerType() || OutTy->isPointerType()) 1508aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Int; 15090c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (OutTy->isRealFloatingType()) 1510aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_FP; 1511aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 1512aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Other; 1513aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner 1514aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // They are ok if they are the same size and in the same domain. This 1515aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // allows tying things like: 1516aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int* 1517aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int if they are the same size. 1518aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // double to long double if they are the same size. 1519aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // 1520aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 1521aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 1522aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutSize == InSize && InputDomain == OutputDomain && 1523aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain != AD_Other) 1524aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 1525aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner 1526aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 1527aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // then we can promote it and the asm string won't notice. Check this 1528aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // case now. 1529aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner bool SmallerValueMentioned = false; 1530aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner for (unsigned p = 0, e = Pieces.size(); p != e; ++p) { 1531aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner AsmStmt::AsmStringPiece &Piece = Pieces[p]; 1532aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (!Piece.isOperand()) continue; 1533aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner 1534aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If this is a reference to the input and if the input was the smaller 1535aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // one, then we have to reject this asm. 1536aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (Piece.getOperandNo() == i+NumOutputs) { 1537aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (InSize < OutSize) { 1538aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner SmallerValueMentioned = true; 1539aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner break; 15403351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 1541f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner } 15421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1543aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If this is a reference to the input and if the input was the smaller 1544aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // one, then we have to reject this asm. 1545aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (Piece.getOperandNo() == TiedTo) { 1546aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (InSize > OutSize) { 1547aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner SmallerValueMentioned = true; 1548aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner break; 1549aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner } 1550aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner } 1551806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 15521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1553aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 1554aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // output was a register, just extend the shorter one to the size of the 1555aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // larger one. 1556aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (!SmallerValueMentioned && InputDomain != AD_Other && 1557aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 1558aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 1559aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner 1560c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 1561806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 15627adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 1563806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 1564806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 1565806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 15661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1567fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 1568fe795956194141c91ae555985c9b930595bff43fChris Lattner} 15693b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 157060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1571431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 1572d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall SourceLocation RParen, Decl *Parm, 15739ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *Body) { 1574d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall VarDecl *Var = cast_or_null<VarDecl>(Parm); 1575160b5630aa781ac348303e1ae088d27016637778Douglas Gregor if (Var && Var->isInvalidDecl()) 1576160b5630aa781ac348303e1ae088d27016637778Douglas Gregor return StmtError(); 1577160b5630aa781ac348303e1ae088d27016637778Douglas Gregor 15789ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtCatchStmt(AtLoc, RParen, Var, Body)); 15793b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 15803b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 158160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 15829ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body) { 15839ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, Body)); 1584161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 1585bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 158660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 15879ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 15889ae2f076ca5ab1feb3ba95629099ec2319833701John McCall MultiStmtArg CatchStmts, Stmt *Finally) { 1589781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 15908f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor unsigned NumCatchStmts = CatchStmts.size(); 15919ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(ObjCAtTryStmt::Create(Context, AtLoc, Try, 15929ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CatchStmts.release(), 15938f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor NumCatchStmts, 15949ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Finally)); 1595bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 1596bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 159760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::BuildObjCAtThrowStmt(SourceLocation AtLoc, 15989ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Throw) { 1599d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (Throw) { 1600d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor QualType ThrowType = Throw->getType(); 1601d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor // Make sure the expression type is an ObjC pointer or "void *". 1602d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!ThrowType->isDependentType() && 1603d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor !ThrowType->isObjCObjectPointerType()) { 1604d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor const PointerType *PT = ThrowType->getAs<PointerType>(); 1605d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!PT || !PT->getPointeeType()->isVoidType()) 1606d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 1607d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor << Throw->getType() << Throw->getSourceRange()); 1608d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 1609d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 1610d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor 16119ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtThrowStmt(AtLoc, Throw)); 1612d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor} 1613d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor 161460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 16159ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1616d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor Scope *CurScope) { 16179ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Throw) { 1618e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 1619e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 1620e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 1621e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 1622e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 1623e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 16244ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 1625d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 1626d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor 16279ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return BuildObjCAtThrowStmt(AtLoc, Throw); 162839f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 1629bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 163060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 16319ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, Expr *SyncExpr, 16329ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SyncBody) { 1633781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 163446c3c4ba78766ac0f1c5ec631b424773e21f5271Chris Lattner 1635a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 16368fdc13a78a43f09ac396e682c35d57ca0b48216dDouglas Gregor if (!SyncExpr->getType()->isDependentType() && 16378fdc13a78a43f09ac396e682c35d57ca0b48216dDouglas Gregor !SyncExpr->getType()->isObjCObjectPointerType()) { 16386217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const PointerType *PT = SyncExpr->getType()->getAs<PointerType>(); 1639a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner if (!PT || !PT->getPointeeType()->isVoidType()) 1640a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner return StmtError(Diag(AtLoc, diag::error_objc_synchronized_expects_object) 1641a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner << SyncExpr->getType() << SyncExpr->getSourceRange()); 1642a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 16431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16449ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, SyncExpr, SyncBody)); 1645fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 16464b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 16474b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 16484b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 164960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1650d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, Decl *ExDecl, 16519ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *HandlerBlock) { 16524b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 16538189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 1654d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall cast_or_null<VarDecl>(ExDecl), 16559ae2f076ca5ab1feb3ba95629099ec2319833701John McCall HandlerBlock)); 16564b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 16578351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 16583c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 16593c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 1660c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlclass TypeWithHandler { 1661c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType t; 1662c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *stmt; 1663c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlpublic: 1664c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler(const QualType &type, CXXCatchStmt *statement) 1665c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl : t(type), stmt(statement) {} 1666c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 16670953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // An arbitrary order is fine as long as it places identical 16680953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // types next to each other. 1669c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator<(const TypeWithHandler &y) const { 16700953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() < y.t.getAsOpaquePtr()) 1671c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return true; 16720953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() > y.t.getAsOpaquePtr()) 1673c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return false; 1674c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl else 1675c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return getTypeSpecStartLoc() < y.getTypeSpecStartLoc(); 1676c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 16771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1678c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator==(const TypeWithHandler& other) const { 16790953e767ff7817f97b3ab20896b229891eeff45bJohn McCall return t == other.t; 1680c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 16811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1682c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *getCatchStmt() const { return stmt; } 1683c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl SourceLocation getTypeSpecStartLoc() const { 1684c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return stmt->getExceptionDecl()->getTypeSpecStartLoc(); 1685c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 1686c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl}; 1687c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 16883c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 16893c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 16908351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 16918351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 169260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 16939ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 16948351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 16958351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 16968351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 16978351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 16989ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt **Handlers = RawHandlers.get(); 16998351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 1700c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::SmallVector<TypeWithHandler, 8> TypesWithHandlers; 17011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (unsigned i = 0; i < NumHandlers; ++i) { 17038351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl CXXCatchStmt *Handler = llvm::cast<CXXCatchStmt>(Handlers[i]); 1704c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (!Handler->getExceptionDecl()) { 1705c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (i < NumHandlers - 1) 1706c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return StmtError(Diag(Handler->getLocStart(), 1707c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::err_early_catch_all)); 17081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1709c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl continue; 1710c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 17111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1712c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CaughtType = Handler->getCaughtType(); 1713c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CanonicalCaughtType = Context.getCanonicalType(CaughtType); 1714c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypesWithHandlers.push_back(TypeWithHandler(CanonicalCaughtType, Handler)); 1715c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 1716c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 1717c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl // Detect handlers for the same type as an earlier one. 1718c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (NumHandlers > 1) { 1719c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::array_pod_sort(TypesWithHandlers.begin(), TypesWithHandlers.end()); 17201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1721c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler prev = TypesWithHandlers[0]; 1722c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl for (unsigned i = 1; i < TypesWithHandlers.size(); ++i) { 1723c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler curr = TypesWithHandlers[i]; 17241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1725c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (curr == prev) { 1726c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(curr.getTypeSpecStartLoc(), 1727c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::warn_exception_caught_by_earlier_handler) 1728c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << curr.getCatchStmt()->getCaughtType().getAsString(); 1729c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(prev.getTypeSpecStartLoc(), 1730c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::note_previous_exception_handler) 1731c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << prev.getCatchStmt()->getCaughtType().getAsString(); 1732c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 17331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1734c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl prev = curr; 1735c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 17368351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 17371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1738781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 1739b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 17408351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 17418351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 17428351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 17438351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 17448351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 17458351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 17469ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(CXXTryStmt::Create(Context, TryLoc, TryBlock, 1747a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig Handlers, NumHandlers)); 17488351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 1749