SemaStmt.cpp revision 351ba91eaa6d30e523587b2d7ed676a5172c6e56
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" 28ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner#include "llvm/ADT/ArrayRef.h" 29c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/STLExtras.h" 30c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/SmallVector.h" 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 32781472fe99a120098c631b0cbe33c89f8cef5e70John McCallusing namespace sema; 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::ActOnExprStmt(FullExprArg expr) { 359ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E = expr.get(); 36bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor if (!E) // FIXME: FullExprArg has no error state? 37bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor return StmtError(); 38bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor 39834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // C99 6.8.3p2: The expression in an expression statement is evaluated as a 40834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // void expression for its side effects. Conversion to void allows any 41834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // operand, even incomplete types. 42a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 43834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // Same thing in for stmt first clause (when expr) and third clause. 44a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(static_cast<Stmt*>(E)); 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4844aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios KyrtzidisStmtResult Sema::ActOnNullStmt(SourceLocation SemiLoc, bool LeadingEmptyMacro) { 4944aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis return Owned(new (Context) NullStmt(SemiLoc, LeadingEmptyMacro)); 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 52337e550218128e7d922c09bb354fbc71de90c568Chris LattnerStmtResult Sema::ActOnDeclStmt(DeclGroupPtrTy dg, SourceLocation StartLoc, 53337e550218128e7d922c09bb354fbc71de90c568Chris Lattner 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>(); 64dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 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(); 9634d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth if (const CXXBindTemporaryExpr *TempExpr = dyn_cast<CXXBindTemporaryExpr>(E)) 9734d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth E = TempExpr->getSubExpr(); 9812f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall 99f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall E = E->IgnoreParenImpCasts(); 100bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { 1010faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall if (E->getType()->isVoidType()) 1020faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall return; 1030faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall 104bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // If the callee has attribute pure, const, or warn_unused_result, warn with 105bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // a more specific message to make it clear what is happening. 106d20254f2875d0004c57ee766f258dbcee29f4841Nuno Lopes if (const Decl *FD = CE->getCalleeDecl()) { 107bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<WarnUnusedResultAttr>()) { 108bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "warn_unused_result"; 109bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 110bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 111bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<PureAttr>()) { 112bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "pure"; 113bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 114bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 115bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<ConstAttr>()) { 116bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "const"; 117bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 118bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 119dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 12012f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (const ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(E)) { 121f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian const ObjCMethodDecl *MD = ME->getMethodDecl(); 122f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian if (MD && MD->getAttr<WarnUnusedResultAttr>()) { 123f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian Diag(Loc, diag::warn_unused_call) << R1 << R2 << "warn_unused_result"; 124f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian return; 125f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 12612f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (isa<ObjCPropertyRefExpr>(E)) { 12712f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall DiagID = diag::warn_unused_property_expr; 128d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor } else if (const CXXFunctionalCastExpr *FC 129d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor = dyn_cast<CXXFunctionalCastExpr>(E)) { 130d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor if (isa<CXXConstructExpr>(FC->getSubExpr()) || 131d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor isa<CXXTemporaryObjectExpr>(FC->getSubExpr())) 132d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor return; 133f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 134209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // Diagnose "(void*) blah" as a typo for "(void) blah". 135209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall else if (const CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(E)) { 136209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall TypeSourceInfo *TI = CE->getTypeInfoAsWritten(); 137209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall QualType T = TI->getType(); 138209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 139209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // We really do want to use the non-canonical type here. 140209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall if (T == Context.VoidPtrTy) { 141209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall PointerTypeLoc TL = cast<PointerTypeLoc>(TI->getTypeLoc()); 142209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 143209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall Diag(Loc, diag::warn_unused_voidptr) 144209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall << FixItHint::CreateRemoval(TL.getStarLoc()); 145209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall return; 146209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 147209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 148209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 149351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek DiagRuntimeBehavior(Loc, 0, PDiag(DiagID) << R1 << R2); 150636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson} 151636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 15260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1531b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 154a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 155a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 156a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 157c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 158c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 159c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus) { 160c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 161c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 162c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 163c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 164c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 165c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 166c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 167c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 168c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 1691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 170c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 1714afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 172c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 173c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 174c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 17598414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 17698414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 177636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson // Ignore statements that are last in a statement expression. 178636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (isStmtExpr && i == NumElts - 1) 17998414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 1801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 181636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson DiagnoseUnusedExprResult(Elts[i]); 18298414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 183a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 1848189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 18760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1889ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1899ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation DotDotDotLoc, Expr *RHSVal, 19024e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 1919ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert((LHSVal != 0) && "missing expression in case statement"); 192117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.4.2p3: The expression shall be an integer constant. 1941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // However, GCC allows any evaluatable integer expression. 1951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!LHSVal->isTypeDependent() && !LHSVal->isValueDependent() && 196dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(LHSVal)) 19724e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1996c36be5b383875b490684bcf439d6d427298c1afChris Lattner // GCC extension: The expression shall be an integer constant. 200117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 201dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (RHSVal && !RHSVal->isTypeDependent() && !RHSVal->isValueDependent() && 202dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(RHSVal)) { 203f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner RHSVal = 0; // Recover by just forgetting about it. 204117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl } 205117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 206781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 2078a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner Diag(CaseLoc, diag::err_case_not_in_switch); 20824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 2098a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 211dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc, DotDotDotLoc, 212dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ColonLoc); 213781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(CS); 214117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 21724e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 2189ae2f076ca5ab1feb3ba95629099ec2319833701John McCallvoid Sema::ActOnCaseStmtBody(Stmt *caseStmt, Stmt *SubStmt) { 21924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 22024e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 22124e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 22224e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 22360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2241eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 2259ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SubStmt, Scope *CurScope) { 226781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 2270fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 228117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 2290fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 230117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 231dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, ColonLoc, SubStmt); 232781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(DS); 233117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 23660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 23757ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerSema::ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 23857ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation ColonLoc, Stmt *SubStmt) { 23957ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner 240ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // If the label was multiply defined, reject it now. 241ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner if (TheDecl->getStmt()) { 242ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << TheDecl->getDeclName(); 243ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(TheDecl->getLocation(), diag::note_previous_definition); 244de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 246de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 247ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // Otherwise, things are good. Fill in the declaration and return it. 248ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setLocation(IdentLoc); 249ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner 250ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner LabelStmt *LS = new (Context) LabelStmt(IdentLoc, TheDecl, SubStmt); 251ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setStmt(LS); 252ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setLocation(IdentLoc); 253ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(LS); 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 25660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 257d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, Decl *CondVar, 25844aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *thenStmt, SourceLocation ElseLoc, 25944aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *elseStmt) { 26060d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(CondVal.release()); 2611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2628cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor VarDecl *ConditionVar = 0; 263d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 264d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 265586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, IfLoc, true); 26699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 26799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 2688cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor } 26999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 27099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 27199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 272dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 273754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(thenStmt); 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2752d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 2762d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 2772d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 2782d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 279b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek // 2809ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!elseStmt) { 2812d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 282a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // But do not warn if the body is a macro that expands to nothing, e.g: 283a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 284a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // #define CALL(x) 285a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // if (condition) 286a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // CALL(0); 287a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 28844aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis if (!stmt->hasLeadingEmptyMacro()) 289b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 2902d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 2912d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 292754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(elseStmt); 2931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 294dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) IfStmt(Context, IfLoc, ConditionVar, ConditionExpr, 29544aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis thenStmt, ElseLoc, elseStmt)); 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 298f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 299f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 300f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 301f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 302f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 3031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, 304f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 305f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 306f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 307f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 3089f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(NewWidth); 309f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 310f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor 311f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // If the input was signed and negative and the output is 312f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // unsigned, don't bother to warn: this is implementation-defined 313f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // behavior. 314f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 315f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 316f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 317f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 3189f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.trunc(NewWidth); 319b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 3209f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.extend(Val.getBitWidth()); 321b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 322f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 323d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 3241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 325f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 326f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 3279f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(NewWidth); 328b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 329f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 330f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 331f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 332dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // We don't diagnose this overflow, because it is implementation-defined 3332853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // behavior. 3342853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 335f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 336f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 337f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 338f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 339f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3400471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3410471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3420471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3430471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3440471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3450471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3460e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3470e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3480e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3490e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3500471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3510471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3520471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3530471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3540471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3550471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3560471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 357764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 358764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 359764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 360764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 361764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 362764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 363764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 364764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 365764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 366764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 367764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 368764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 369764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 370764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 371ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// CmpEnumVals - Comparison predicate for sorting enumeration values. 372ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 373ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool CmpEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 374ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 375ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 376ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first < rhs.first; 377ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 378ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 379ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// EqEnumVals - Comparison preficate for uniqing enumeration values. 380ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 381ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool EqEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 382ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 383ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 384ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first == rhs.first; 385ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 386ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 3875f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// GetTypeBeforeIntegralPromotion - Returns the pre-promotion type of 3885f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// potentially integral-promoted expression @p expr. 3895f04881eb025f61396d0555d8173730fe2759e0aChris Lattnerstatic QualType GetTypeBeforeIntegralPromotion(const Expr* expr) { 3906907fbe758d23e1aec4c0a67e7b633d1d855feb4John McCall if (const CastExpr *ImplicitCast = dyn_cast<ImplicitCastExpr>(expr)) { 3915f04881eb025f61396d0555d8173730fe2759e0aChris Lattner const Expr *ExprBeforePromotion = ImplicitCast->getSubExpr(); 3925f04881eb025f61396d0555d8173730fe2759e0aChris Lattner QualType TypeBeforePromotion = ExprBeforePromotion->getType(); 3932ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (TypeBeforePromotion->isIntegralOrEnumerationType()) { 3945f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return TypeBeforePromotion; 3955f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 3965f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 3975f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return expr->getType(); 3985f04881eb025f61396d0555d8173730fe2759e0aChris Lattner} 3995f04881eb025f61396d0555d8173730fe2759e0aChris Lattner 40060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 401dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, Expr *Cond, 402d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall Decl *CondVar) { 40360d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult; 4049ae2f076ca5ab1feb3ba95629099ec2319833701John McCall 405586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor VarDecl *ConditionVar = 0; 406d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 407d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 4089ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult = CheckConditionVariable(ConditionVar, SourceLocation(), false); 4099ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 410586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 411dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4129ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.release(); 413586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 414dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4159ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Cond) 416586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 417dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4189ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult 419dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = ConvertToIntegralOrEnumerationType(SwitchLoc, Cond, 420c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_typecheck_statement_requires_integer), 421c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_incomplete_class_type) 4229ae2f076ca5ab1feb3ba95629099ec2319833701John McCall << Cond->getSourceRange(), 423c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_explicit_conversion), 424c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::note_switch_conversion), 425c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_multiple_conversions), 4266bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(diag::note_switch_conversion), 4276bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(0)); 4289ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) return StmtError(); 4299ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 430dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 431d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (!CondVar) { 432b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, SwitchLoc); 4334765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall CondResult = MaybeCreateExprWithCleanups(Cond); 4349ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 435586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 4369ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 437586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 438b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 439781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchIntoScope(); 440dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4419ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = new (Context) SwitchStmt(Context, ConditionVar, Cond); 442781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.push_back(SS); 443586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return Owned(SS); 4447e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner} 4457e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner 44628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greifstatic void AdjustAPSInt(llvm::APSInt &Val, unsigned BitWidth, bool IsSigned) { 44728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif if (Val.getBitWidth() < BitWidth) 4489f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(BitWidth); 44928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif else if (Val.getBitWidth() > BitWidth) 4509f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(BitWidth); 45128164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Val.setIsSigned(IsSigned); 45228164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif} 45328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif 45460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 4559ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, Stmt *Switch, 4569ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *BodyStmt) { 4579ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = cast<SwitchStmt>(Switch); 458781472fe99a120098c631b0cbe33c89f8cef5e70John McCall assert(SS == getCurFunction()->SwitchStack.back() && 459781472fe99a120098c631b0cbe33c89f8cef5e70John McCall "switch stack missing push/pop!"); 460de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 4619dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 462781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.pop_back(); 463c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 464ff331c15729f7d4439d253c97f4d60f2a7ffd0c6Douglas Gregor if (SS->getCond() == 0) 465be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor return StmtError(); 466dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 467f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 4680fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr *CondExprBeforePromotion = CondExpr; 46984fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor QualType CondTypeBeforePromotion = 47084fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor GetTypeBeforeIntegralPromotion(CondExpr); 471de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 4720de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 4730de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor UsualUnaryConversions(CondExpr); 474a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor QualType CondType = CondExpr->getType(); 47584fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor SS->setCond(CondExpr); 47684fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor 4775f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // C++ 6.4.2.p2: 4785f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // Integral promotions are performed (on the switch condition). 4795f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // 4805f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // A case value unrepresentable by the original switch condition 4815f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // type (before the promotion) doesn't make sense, even when it can 4825f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // be represented by the promoted type. Therefore we need to find 4835f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // the pre-promotion type of the switch condition. 48412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondExpr->isTypeDependent()) { 485acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // We have already converted the expression to an integral or enumeration 486dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // type, when we started the switch statement. If we don't have an 487acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // appropriate type now, just return an error. 488acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor if (!CondType->isIntegralOrEnumerationType()) 48912356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan return StmtError(); 49012356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan 4912b334bb3126a67895813e49e6228dad4aec0b4d6Chris Lattner if (CondExpr->isKnownToHaveBooleanValue()) { 49212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(bool_expr) {...} is often a programmer error, e.g. 49312356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(n && mask) { ... } // Doh - should be "n & mask". 49412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // One can always use an if statement instead of switch(bool_expr). 49512356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::warn_bool_switch_condition) 49612356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondExpr->getSourceRange(); 49712356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 498c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 499de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 500f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 501f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 5021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HasDependentValue 503dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 5041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned CondWidth 505dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = HasDependentValue? 0 5065f04881eb025f61396d0555d8173730fe2759e0aChris Lattner : static_cast<unsigned>(Context.getTypeSize(CondTypeBeforePromotion)); 5075f04881eb025f61396d0555d8173730fe2759e0aChris Lattner bool CondIsSigned = CondTypeBeforePromotion->isSignedIntegerType(); 5081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 509f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 510f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 511f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 5120471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner typedef llvm::SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 5130471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 5141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 515f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 516ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRangesTy; 517ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy CaseRanges; 5181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 519f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 5201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 521b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 5221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 523dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 524c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 5251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 526c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 527f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 528f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 5295f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 530de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 531f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 532390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 533390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 534390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 535b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 536c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 537f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 5381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 539f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 540f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 5411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 542f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 543f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 5441e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 545dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 546dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 547dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 548dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 549dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 5501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 55151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 5521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 553f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 554f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 55528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Lo->getLocStart(), 556f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 5576c36be5b383875b490684bcf439d6d427298c1afChris Lattner 5581e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 5591e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 5602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall ImpCastExprToType(Lo, CondType, CK_IntegralCast); 5611e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 5621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 563b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 564dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 5651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CS->getRHS()->isTypeDependent() || 566dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 567dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 568dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 569dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 570f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 5711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 572b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 573f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 574f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 575b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 576dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 5770fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // If we don't have a default statement, check whether the 5780fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // condition is constant. 5790fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt ConstantCondValue; 5800fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool HasConstantCond = false; 5810fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool ShouldCheckConstantCond = false; 5820fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!HasDependentValue && !TheDefaultStmt) { 5830fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr::EvalResult Result; 5840fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall HasConstantCond = CondExprBeforePromotion->Evaluate(Result, Context); 5850fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (HasConstantCond) { 5860fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(Result.Val.isInt() && "switch condition evaluated to non-int"); 5870fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue = Result.Val.getInt(); 5880fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = true; 5890fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 5900fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(ConstantCondValue.getBitWidth() == CondWidth && 5910fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue.isSigned() == CondIsSigned); 5920fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 5930fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 5940fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 595dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 596dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 597dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 598dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 5990fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (unsigned i = 0, e = CaseVals.size(); i != e; ++i) { 6000fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 6010fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CaseVals[i].first == ConstantCondValue) 6020fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6030fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6040fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (i != 0 && CaseVals[i].first == CaseVals[i-1].first) { 605dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 6061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(CaseVals[i].second->getLHS()->getLocStart(), 6070fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall diag::err_duplicate_case) << CaseVals[i].first.toString(10); 6080fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CaseVals[i-1].second->getLHS()->getLocStart(), 609dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 610390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 611390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 612dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 613dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6146efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 615b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 6161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 617dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 618dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 619dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 620dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 621dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 622dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 6231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 624dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 625dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 626dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 6270fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt &LoVal = CaseRanges[i].first; 628dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 629dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 630dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 6311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 632dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 633dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 63428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocStart(), 635dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 6361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 637dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the LHS is not the same type as the condition, insert an implicit 638dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // cast. 6392de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall ImpCastExprToType(Hi, CondType, CK_IntegralCast); 640dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 642dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 6430fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (LoVal > HiVal) { 644dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 645dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 64628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocEnd()); 647dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 648dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 649dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 650dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6510fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6520fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 6530fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall LoVal <= ConstantCondValue && 6540fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue <= HiVal) 6550fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6560fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 657dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 6580471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 6591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 660dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 661dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 662dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 663dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 664dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 665dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 666dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 6671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 668dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 669dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 670dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 671dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 6721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 673dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 674dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 675dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 676dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 677dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 678dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 679dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 680dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 681dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 683dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 684dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 685dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 686dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 687dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 688dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 690dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 691dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 692dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 693dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 694dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 695dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 697dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 698dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 699dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 700dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 7011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(OverlapStmt->getLHS()->getLocStart(), 702dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 703390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 704390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 705dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 706dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7070471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 708b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 709ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7100fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Complain if we have a constant condition and we didn't find a match. 7110fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!CaseListIsErroneous && ShouldCheckConstantCond) { 7120fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // TODO: it would be nice if we printed enums as enums, chars as 7130fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // chars, etc. 7140fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CondExpr->getExprLoc(), diag::warn_missing_case_for_condition) 7150fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ConstantCondValue.toString(10) 7160fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << CondExpr->getSourceRange(); 7170fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 7180fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7190fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Check to see if switch is over an Enum and handles all of its 720559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // values. We only issue a warning if there is not 'default:', but 721559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // we still do the analysis to preserve this information in the AST 722559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // (which can be used by flow-based analyes). 7230fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // 724ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner const EnumType *ET = CondTypeBeforePromotion->getAs<EnumType>(); 725559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 726ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // If switch has default case, then ignore it. 727559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!CaseListIsErroneous && !HasConstantCond && ET) { 728ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const EnumDecl *ED = ET->getDecl(); 729ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef llvm::SmallVector<std::pair<llvm::APSInt, EnumConstantDecl*>, 64> EnumValsTy; 730ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy EnumVals; 731ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7320fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Gather all enum values, set their type and sort them, 7330fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // allowing easier comparison with CaseVals. 7340fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (EnumDecl::enumerator_iterator EDI = ED->enumerator_begin(); 73528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EDI != ED->enumerator_end(); ++EDI) { 73628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif llvm::APSInt Val = EDI->getInitVal(); 73728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Val, CondWidth, CondIsSigned); 73828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EnumVals.push_back(std::make_pair(Val, *EDI)); 739ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 740ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor std::stable_sort(EnumVals.begin(), EnumVals.end(), CmpEnumVals); 7410fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall EnumValsTy::iterator EIend = 7420fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall std::unique(EnumVals.begin(), EnumVals.end(), EqEnumVals); 743559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 744559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // See which case values aren't in enum. 745559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // TODO: we might want to check whether case values are out of the 746559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // enum even if we don't want to check whether all cases are handled. 747559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!TheDefaultStmt) { 74847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EnumValsTy::const_iterator EI = EnumVals.begin(); 74947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseValsTy::const_iterator CI = CaseVals.begin(); 7500fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CI != CaseVals.end(); CI++) { 75147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < CI->first) 75247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 75347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first > CI->first) 7540fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 7550fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ED->getDeclName(); 75647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 75747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek // See which of case ranges aren't in enum 75847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI = EnumVals.begin(); 75947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseRangesTy::const_iterator RI = CaseRanges.begin(); 7600fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall RI != CaseRanges.end() && EI != EIend; RI++) { 76147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < RI->first) 76247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 763dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 76447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != RI->first) { 76547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 76647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 76747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 768e0ba9d1beeba01a96808c2fc61f9ca89acec313bTed Kremenek 76947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 77028164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 77147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < Hi) 77247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 77347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != Hi) 77447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getRHS()->getExprLoc(), diag::warn_not_in_enum) 77547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 77647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 777ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 778dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 779559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Check which enum vals aren't in switch 780ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseValsTy::const_iterator CI = CaseVals.begin(); 781ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy::const_iterator RI = CaseRanges.begin(); 782559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek bool hasCasesNotInSwitch = false; 783559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 784ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner llvm::SmallVector<DeclarationName,8> UnhandledNames; 785dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 786559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek for (EnumValsTy::const_iterator EI = EnumVals.begin(); EI != EIend; EI++){ 787ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Drop unneeded case values 788ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt CIVal; 789ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (CI != CaseVals.end() && CI->first < EI->first) 790ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CI++; 791dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 792ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (CI != CaseVals.end() && CI->first == EI->first) 793ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor continue; 794ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 795559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Drop unneeded case ranges 796ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (; RI != CaseRanges.end(); RI++) { 797ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 79828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 799ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI->first <= Hi) 800ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor break; 801ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 802ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 803559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (RI == CaseRanges.end() || EI->first < RI->first) { 80447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek hasCasesNotInSwitch = true; 80547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (!TheDefaultStmt) 806ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner UnhandledNames.push_back(EI->second->getDeclName()); 80747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 808ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 809dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 810ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Produce a nice diagnostic if multiple values aren't handled. 811ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner switch (UnhandledNames.size()) { 812ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 0: break; 813ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 1: 814ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case1) 815ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0]; 816ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 817ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 2: 818ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case2) 819ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1]; 820ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 821ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 3: 822ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case3) 823ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 824ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 825ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner default: 826ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_cases) 827ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << (unsigned)UnhandledNames.size() 828ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 829ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 830ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner } 831559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 832559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!hasCasesNotInSwitch) 83347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek SS->setAllEnumCasesCovered(); 834ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 835b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 836dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 837390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 838390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 839b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 840de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 841de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 842de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 8435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 84560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 846dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, 8479ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Decl *CondVar, Stmt *Body) { 84860d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(Cond.release()); 849dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8505656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor VarDecl *ConditionVar = 0; 851d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 852d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 853586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, WhileLoc, true); 85499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 85599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 8565656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor } 8579ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *ConditionExpr = CondResult.take(); 85899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 85999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 860dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8619ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 8621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86343dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor return Owned(new (Context) WhileStmt(Context, ConditionVar, ConditionExpr, 8649ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Body, WhileLoc)); 8655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 86760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 8689ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 869989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 8709ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Cond, SourceLocation CondRParen) { 8719ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert(Cond && "ActOnDoStmt(): missing expression"); 872f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 8739ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CheckBooleanCondition(Cond, DoLoc)) 8745a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 8755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 876b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, DoLoc); 8774765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall ExprResult CondResult = MaybeCreateExprWithCleanups(Cond); 8789ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 879586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 8809ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 881dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8829ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 883754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 8849ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) DoStmt(Body, Cond, DoLoc, WhileLoc, CondRParen)); 8855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 88760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 888f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 8899ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, FullExprArg second, Decl *secondVar, 89099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor FullExprArg third, 8919ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 8925921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 8935921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 894f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 895f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 896f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 8975921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 8985921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 8995921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 900b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD && VD->isLocalVarDecl() && !VD->hasLocalStorage()) 9015921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 9025921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 9035921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 9045921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 9055921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 906ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 9075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 90899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 90960d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult SecondResult(second.release()); 91099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor VarDecl *ConditionVar = 0; 911d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (secondVar) { 912d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(secondVar); 913586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor SecondResult = CheckConditionVariable(ConditionVar, ForLoc, true); 91499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (SecondResult.isInvalid()) 91599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 91699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor } 917dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 91899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Third = third.release().takeAs<Expr>(); 919dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9203af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(First); 9213af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(Third); 922754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(Body); 923754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 924dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) ForStmt(Context, First, 925dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi SecondResult.take(), ConditionVar, 926dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Third, Body, ForLoc, LParenLoc, 92743dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor RParenLoc)); 9285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 930f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// In an Objective C collection iteration statement: 931f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// for (x in y) 932f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// x can be an arbitrary l-value expression. Bind it up as a 933f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// full-expression. 934f6a1648197562e0b133440d612d9af297d0a86ccJohn McCallStmtResult Sema::ActOnForEachLValueExpr(Expr *E) { 935f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall CheckImplicitConversions(E); 9364765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall ExprResult Result = MaybeCreateExprWithCleanups(E); 937f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall if (Result.isInvalid()) return StmtError(); 938f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall return Owned(static_cast<Stmt*>(Result.get())); 939f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall} 940f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall 94160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 942f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 943f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 9449ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, Expr *Second, 9459ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 94620552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 94720552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 94820552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 9497e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 950f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 951f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 952f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 9537e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner Decl *D = DS->getSingleDecl(); 954f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek FirstType = cast<ValueDecl>(D)->getType(); 955f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 956f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 957f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 958248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff VarDecl *VD = cast<VarDecl>(D); 959b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD->isLocalVarDecl() && !VD->hasLocalStorage()) 960f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(VD->getLocation(), 961f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 9621fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 963c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor Expr *FirstE = cast<Expr>(First); 9647eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (!FirstE->isTypeDependent() && !FirstE->isLValue()) 965f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 966f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 967f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 9681fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 9691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FirstType = static_cast<Expr*>(First)->getType(); 9701fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 971c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (!FirstType->isDependentType() && 972c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor !FirstType->isObjCObjectPointerType() && 973a5e42a82ce055f29f3733f3a1f10da6cb9877deeFariborz Jahanian !FirstType->isBlockPointerType()) 974dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 975d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 9763ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 977c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (Second && !Second->isTypeDependent()) { 978a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(Second); 9793ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian QualType SecondType = Second->getType(); 980f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!SecondType->isObjCObjectPointerType()) 981dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_collection_expr_type) 982d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 983ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian else if (const ObjCObjectPointerType *OPT = 984ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian SecondType->getAsObjCInterfacePointerType()) { 985ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian llvm::SmallVector<IdentifierInfo *, 4> KeyIdents; 986dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi IdentifierInfo* selIdent = 987ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian &Context.Idents.get("countByEnumeratingWithState"); 988ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 989ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian selIdent = &Context.Idents.get("objects"); 990ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 991ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian selIdent = &Context.Idents.get("count"); 992ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 993ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian Selector CSelector = Context.Selectors.getSelector(3, &KeyIdents[0]); 994ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian if (ObjCInterfaceDecl *IDecl = OPT->getInterfaceDecl()) { 995dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!IDecl->isForwardDecl() && 996ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian !IDecl->lookupInstanceMethod(CSelector)) { 99780a785c2452c73b7c41d4a867edcf5a090c78c46Fariborz Jahanian // Must further look into private implementation methods. 998ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian if (!LookupPrivateInstanceMethod(CSelector, IDecl)) 999ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian Diag(ForLoc, diag::warn_collection_expr_type) 1000ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian << SecondType << CSelector << Second->getSourceRange(); 1001ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 1002ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 1003ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 10043ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 10058189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 10068189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 10073ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 10085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 100957ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerStmtResult Sema::ActOnGotoStmt(SourceLocation GotoLoc, 101057ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation LabelLoc, 101157ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner LabelDecl *TheDecl) { 101257ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner getCurFunction()->setHasBranchIntoScope(); 1013ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setUsed(); 1014ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(new (Context) GotoStmt(TheDecl, GotoLoc, LabelLoc)); 10155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 101760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1018ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 10199ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E) { 1020bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 10215f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 10225f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 10232877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth QualType DestTy = Context.getPointerType(Context.VoidTy.withConst()); 10245f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 10252877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth CheckSingleAssignmentConstraints(DestTy, E); 10262877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth if (DiagnoseAssignmentResult(ConvTy, StarLoc, DestTy, ETy, E, AA_Passing)) 10275f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 10285f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 1029b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 1030781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasIndirectGoto(); 1031b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 10325f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 10335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 103560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 10361b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 10375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 10385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 10395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 10404cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 10415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10424cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10438189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 10445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 104660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 10471b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 10485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 10495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 10505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 10514cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 10525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10534cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10548189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 10555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1057dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \brief Determine whether the given expression is a candidate for 1058f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// copy elision in either a return statement or a throw expression. 10595077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1060f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param ReturnType If we're determining the copy elision candidate for 1061f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// a return statement, this is the return type of the function. If we're 1062f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// determining the copy elision candidate for a throw expression, this will 1063f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// be a NULL type. 10645077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1065f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param E The expression being returned from the function or block, or 1066f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// being thrown. 10675077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1068f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param AllowFunctionParameter 10695077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 10705077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \returns The NRVO candidate variable, if the return statement may use the 10715077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// NRVO, or NULL if there is no such candidate. 1072f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregorconst VarDecl *Sema::getCopyElisionCandidate(QualType ReturnType, 1073f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor Expr *E, 1074f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor bool AllowFunctionParameter) { 1075f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor QualType ExprType = E->getType(); 10763c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // - in a return statement in a function with ... 10773c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // ... a class return type ... 1078f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType.isNull()) { 1079f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType->isRecordType()) 1080f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1081f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // ... the same cv-unqualified type as the function return type ... 1082f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!Context.hasSameUnqualifiedType(ReturnType, ExprType)) 1083f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1084f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor } 1085dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1086dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // ... the expression is the name of a non-volatile automatic object 1087f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // (other than a function or catch-clause parameter)) ... 1088f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(E->IgnoreParens()); 10893c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!DR) 10905077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 10913c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 10923c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!VD) 10935077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 1094dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1095f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (VD->hasLocalStorage() && !VD->isExceptionVariable() && 1096d86c477fb5d3fc34864afecbbb5443da9355e8fbDouglas Gregor !VD->getType()->isReferenceType() && !VD->hasAttr<BlocksAttr>() && 1097f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor !VD->getType().isVolatileQualified() && 10984a46c77813af1241139b81a086b539e4d734cb86Douglas Gregor ((VD->getKind() == Decl::Var) || 10994a46c77813af1241139b81a086b539e4d734cb86Douglas Gregor (AllowFunctionParameter && VD->getKind() == Decl::ParmVar))) 11005077c3876beeaed32280af88244e8050078619a8Douglas Gregor return VD; 1101dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 11025077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 11033c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor} 11043c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor 110507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// \brief Perform the initialization of a potentially-movable value, which 110607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// is the result of return value. 1107cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// 1108cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// This routine implements C++0x [class.copy]p33, which attempts to treat 1109cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// returned lvalues as rvalues in certain cases (to prefer move construction), 1110cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// then falls back to treating them as lvalues if that failed. 1111dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiExprResult 111207f402cff25354c5f06f307f19b0c57c09d964bdDouglas GregorSema::PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 111307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor const VarDecl *NRVOCandidate, 111407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor QualType ResultType, 111507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Expr *Value) { 1116cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // C++0x [class.copy]p33: 1117dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // When the criteria for elision of a copy operation are met or would 1118dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // be met save for the fact that the source object is a function 1119dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // parameter, and the object to be copied is designated by an lvalue, 1120cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // overload resolution to select the constructor for the copy is first 1121cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // performed as if the object were designated by an rvalue. 1122cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor ExprResult Res = ExprError(); 112307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor if (NRVOCandidate || getCopyElisionCandidate(ResultType, Value, true)) { 1124dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ImplicitCastExpr AsRvalue(ImplicitCastExpr::OnStack, 112507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getType(), CK_LValueToRValue, 112607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value, VK_XValue); 1127dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1128cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Expr *InitExpr = &AsRvalue; 1129dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializationKind Kind 113007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = InitializationKind::CreateCopy(Value->getLocStart(), 113107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getLocStart()); 113207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor InitializationSequence Seq(*this, Entity, Kind, &InitExpr, 1); 1133dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1134dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // [...] If overload resolution fails, or if the type of the first 1135cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // parameter of the selected constructor is not an rvalue reference 11360099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // to the object's type (possibly cv-qualified), overload resolution 1137cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // is performed again, considering the object as an lvalue. 1138cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor if (Seq.getKind() != InitializationSequence::FailedSequence) { 1139cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor for (InitializationSequence::step_iterator Step = Seq.step_begin(), 1140cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor StepEnd = Seq.step_end(); 1141cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Step != StepEnd; ++Step) { 1142dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (Step->Kind 1143cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor != InitializationSequence::SK_ConstructorInitialization) 1144cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor continue; 1145dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1146dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CXXConstructorDecl *Constructor 1147cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor = cast<CXXConstructorDecl>(Step->Function.Function); 1148dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1149cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor const RValueReferenceType *RRefType 115007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = Constructor->getParamDecl(0)->getType() 115107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor ->getAs<RValueReferenceType>(); 1152dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1153cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // If we don't meet the criteria, break out now. 1154dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!RRefType || 115507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor !Context.hasSameUnqualifiedType(RRefType->getPointeeType(), 115607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Context.getTypeDeclType(Constructor->getParent()))) 1157cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor break; 1158dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1159cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Promote "AsRvalue" to the heap, since we now need this 1160cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // expression node to persist. 116107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value = ImplicitCastExpr::Create(Context, Value->getType(), 1162dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CK_LValueToRValue, Value, 0, 116307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor VK_XValue); 1164dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1165cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Complete type-checking the initialization of the return type 1166cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // using the constructor we found. 116707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = Seq.Perform(*this, Entity, Kind, MultiExprArg(&Value, 1)); 1168cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1169cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1170cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1171dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1172cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Either we didn't meet the criteria for treating an lvalue as an rvalue, 1173dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // above, or overload resolution failed. Either way, we need to try 1174cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // (again) now with the return value expression as written. 1175cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor if (Res.isInvalid()) 117607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = PerformCopyInitialization(Entity, SourceLocation(), Value); 1177dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1178cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor return Res; 1179cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor} 1180cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor 118127c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 11824eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 118360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 11844eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 11854eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 11864eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 11879ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor BlockScopeInfo *CurBlock = getCurBlock(); 11887d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CurBlock->ReturnType.isNull()) { 1189c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 119016564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 119116564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 1192a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(RetValExp); 11937d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = RetValExp->getType(); 11947d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(RetValExp)) { 11957d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // We have to remove a 'const' added to copied-in variable which was 11967d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // part of the implementation spec. and not the actual qualifier for 11977d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // the variable. 11987d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CDRE->isConstQualAdded()) 119949f4e1cbd839da27ff4814b4ea6d85a79f786cbdJohn McCall CurBlock->ReturnType.removeLocalConst(); // FIXME: local??? 12007d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian } 1201c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 12027d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = Context.VoidTy; 12034eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 12047d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian QualType FnRetType = CurBlock->ReturnType; 12054cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1206711c52bb20d0c69063b52a99826fb7d2835501f1John McCall if (CurBlock->FunctionType->getAs<FunctionType>()->getNoReturnAttr()) { 12076c92fa75e62937f9738696840efcb258560f4568Mike Stump Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr) 12086c92fa75e62937f9738696840efcb258560f4568Mike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 12096c92fa75e62937f9738696840efcb258560f4568Mike Stump return StmtError(); 12106c92fa75e62937f9738696840efcb258560f4568Mike Stump } 12116c92fa75e62937f9738696840efcb258560f4568Mike Stump 12124eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 12134eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 12144eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 12155077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 12164eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 12174eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) { 12184eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 12194eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 12204eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 12215077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 12225077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp) { 12234cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 12245077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 12255077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 1226dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 12275077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 12285077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void block with an expression, continue checking 12295077c3876beeaed32280af88244e8050078619a8Douglas Gregor 12305077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 12315077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 12325077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 12335077c3876beeaed32280af88244e8050078619a8Douglas Gregor 12345077c3876beeaed32280af88244e8050078619a8Douglas Gregor // In C++ the return statement is handled via a copy initialization. 12355077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 1236f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 1237dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 123807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 123907f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor NRVOCandidate != 0); 1240dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 124107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 12425077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 12435077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 12445077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 12455077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 1246dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1247b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1248b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 12494765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1250b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 12514cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 12525077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 1253dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 12545077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 1255c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson } 1256dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 12575077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 125898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 12594cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1260dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 12615077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 12625077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 12635077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 12645077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1265dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 12665077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 12674eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 12685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 126960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 12709ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 12719ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor if (getCurBlock()) 12724eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 12734cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1274371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 1275f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 1276371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 127704a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall if (FD->hasAttr<NoReturnAttr>() || 127804a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall FD->getType()->getAs<FunctionType>()->getNoReturnAttr()) 12798662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 1280f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 1281f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump } else if (ObjCMethodDecl *MD = getCurMethodDecl()) 1282c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff FnRetType = MD->getResultType(); 1283c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff else // If we don't have a function/method context, bail. 1284c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 12851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12865077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 12875cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 12881be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor if (RetValExp && !RetValExp->isTypeDependent()) { 12891be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor // C99 6.8.6.4p1 (ext_ since GCC warns) 129065ce04bef06696379682410f399f37b43996d824Chris Lattner unsigned D = diag::ext_return_has_expr; 129165ce04bef06696379682410f399f37b43996d824Chris Lattner if (RetValExp->getType()->isVoidType()) 129265ce04bef06696379682410f399f37b43996d824Chris Lattner D = diag::ext_return_has_void_expr; 1293f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall else { 1294f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall IgnoredValueConversions(RetValExp); 1295f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall ImpCastExprToType(RetValExp, Context.VoidTy, CK_ToVoid); 1296f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall } 12974cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1298e878eb035b343d7d819c092102364ec9849716aeChris Lattner // return (some void expression); is legal in C++. 1299e878eb035b343d7d819c092102364ec9849716aeChris Lattner if (D != diag::ext_return_has_void_expr || 1300e878eb035b343d7d819c092102364ec9849716aeChris Lattner !getLangOptions().CPlusPlus) { 1301e878eb035b343d7d819c092102364ec9849716aeChris Lattner NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 1302e878eb035b343d7d819c092102364ec9849716aeChris Lattner Diag(ReturnLoc, D) 1303e878eb035b343d7d819c092102364ec9849716aeChris Lattner << CurDecl->getDeclName() << isa<ObjCMethodDecl>(CurDecl) 1304e878eb035b343d7d819c092102364ec9849716aeChris Lattner << RetValExp->getSourceRange(); 1305e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 13061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1307b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 13084765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 13095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1310dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 13115077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 13125077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp && !FnRetType->isDependentType()) { 13133c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 13143c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 13153c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 13163c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 13173c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 131808631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 13193c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 132008631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 13215077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc); 13225077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 13235077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 13245077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 13255077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void function with an expression, continue checking 13265077c3876beeaed32280af88244e8050078619a8Douglas Gregor 13275077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 13285077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 13295077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 13305077c3876beeaed32280af88244e8050078619a8Douglas Gregor 13315077c3876beeaed32280af88244e8050078619a8Douglas Gregor // In C++ the return statement is handled via a copy initialization. 13325077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 1333f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 1334dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 133507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 133607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor NRVOCandidate != 0); 1337dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 133807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 13395077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 13405077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 13415077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 13425077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 13434cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 13445077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 1345dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 13465077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 134766724ea67d7d598b937d86fa66f03f09a1c758f3Douglas Gregor } 1348dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1349b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1350b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 13514765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1352b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 13535077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 1354898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 1355dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1356dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 13575077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 13585077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 13595077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 13605077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1361dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 13625077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 13635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 13645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1365810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 1366810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 1367810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 1368810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 1369810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 1370810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 1371810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 1372810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 1373703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson // Type dependent expressions will be checked during instantiation. 1374703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson if (E->isTypeDependent()) 1375703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson return false; 1376dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 13777eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E->isLValue()) 1378810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 1379810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1380810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 1381810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 1382810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 13837eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E != E2 && E2->isLValue()) { 1384810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (!S.getLangOptions().HeinousExtensions) 1385810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 1386810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1387810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 1388810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 1389810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1390810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 1391810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 1392810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 1393810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1394810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 1395810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 1396810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 1397810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1398ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// isOperandMentioned - Return true if the specified operand # is mentioned 1399ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// anywhere in the decomposed asm string. 1400ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattnerstatic bool isOperandMentioned(unsigned OpNo, 1401ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner llvm::ArrayRef<AsmStmt::AsmStringPiece> AsmStrPieces) { 1402ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner for (unsigned p = 0, e = AsmStrPieces.size(); p != e; ++p) { 1403ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner const AsmStmt::AsmStringPiece &Piece = AsmStrPieces[p]; 1404ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (!Piece.isOperand()) continue; 1405ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1406ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 1407ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 1408ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (Piece.getOperandNo() == OpNo) 1409ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return true; 1410ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 1411ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1412ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return false; 1413ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner} 1414810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1415ca57b4b7658a031b74cda5ac504311998be8e343Chris LattnerStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, bool IsSimple, 1416ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner bool IsVolatile, unsigned NumOutputs, 1417ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner unsigned NumInputs, IdentifierInfo **Names, 1418ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner MultiExprArg constraints, MultiExprArg exprs, 1419ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner Expr *asmString, MultiExprArg clobbers, 1420ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner SourceLocation RParenLoc, bool MSAsm) { 14213037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 14223037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 14233037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 14249ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr **Exprs = exprs.get(); 14259ae2f076ca5ab1feb3ba95629099ec2319833701John McCall StringLiteral *AsmString = cast<StringLiteral>(asmString); 14263037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 14273037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 142803eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson llvm::SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 14291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14301708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 14316bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (AsmString->isWide()) 14323037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 14333037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 14343037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 14351708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 14361708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 14376bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 14383037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 14393037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 14403037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1441ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef OutputName; 1442ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1443ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson OutputName = Names[i]->getName(); 1444ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1445ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 1446432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner if (!Context.Target.validateOutputConstraint(Info)) 14473037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1448432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 1449432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 14503037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1451d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 145272056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 1453810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 145472056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 1455dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 145672056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 145704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 14581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 145944def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 146004728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 14613037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1462806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner llvm::SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 1463806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 146404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 14651708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 14666bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 14673037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 14683037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 14693037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1470ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef InputName; 1471ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1472ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson InputName = Names[i]->getName(); 1473ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1474ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 1475beaaccd8e2a8748f77b66e2b330fb9136937e14cJay Foad if (!Context.Target.validateInputConstraint(OutputConstraintInfos.data(), 14762819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 14773037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1478432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 1479432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 1480d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 14813037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 148272056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 14833037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1484d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 148544def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 1486810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 148772056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1488d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 1489432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 149072056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 149104728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 14923037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 149344def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 1494d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 149572056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1496d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 14971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump << InputExpr->getType() << Info.getConstraintStr() 149872056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 1499d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 1500d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 15011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1502a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(Exprs[i]); 15031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1504806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 150504728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 15063037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 15076fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 15081708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 15091708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 15106bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 15113037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 15123037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 15133037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1514fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson llvm::StringRef Clobber = Literal->getString(); 15153037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1516fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson if (!Context.Target.isValidGCCRegisterName(Clobber)) 15173037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 15187765934ad7e157b5fcf925792a38e01b1edbcf8aDaniel Dunbar diag::err_asm_unknown_register_name) << Clobber); 15196fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 15203037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1521fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 1522dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm, 1523dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NumOutputs, NumInputs, Names, Constraints, Exprs, 1524966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson AsmString, NumClobbers, Clobbers, RParenLoc); 1525fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 1526fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 1527fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner llvm::SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 1528fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 1529fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 15302ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 15312ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 1532fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 1533fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 15341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1535806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 1536806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 1537806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 15381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1539806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 1540806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 1541806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 1542806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 15431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1544806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 1545935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner unsigned InputOpNo = i+NumOutputs; 1546f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 1547935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Expr *InputExpr = Exprs[InputOpNo]; 15487adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 15497adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 15507adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 1551806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 15521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1553aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // Decide if the input and output are in the same domain (integer/ptr or 1554aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // floating point. 1555aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner enum AsmDomain { 1556aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner AD_Int, AD_FP, AD_Other 1557aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner } InputDomain, OutputDomain; 1558dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1559aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (InTy->isIntegerType() || InTy->isPointerType()) 1560aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Int; 15610c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (InTy->isRealFloatingType()) 1562aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_FP; 1563aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 1564aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Other; 15653351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 1566aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutTy->isIntegerType() || OutTy->isPointerType()) 1567aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Int; 15680c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (OutTy->isRealFloatingType()) 1569aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_FP; 1570aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 1571aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Other; 1572dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1573aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // They are ok if they are the same size and in the same domain. This 1574aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // allows tying things like: 1575aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int* 1576aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int if they are the same size. 1577aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // double to long double if they are the same size. 1578dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // 1579aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 1580aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 1581aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutSize == InSize && InputDomain == OutputDomain && 1582aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain != AD_Other) 1583aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 1584dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1585aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 1586f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // then we can promote the smaller one to a larger input and the asm string 1587f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // won't notice. 1588aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner bool SmallerValueMentioned = false; 1589ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1590ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 1591ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 1592935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (isOperandMentioned(InputOpNo, Pieces)) { 1593ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // This is a use in the asm string of the smaller operand. Since we 1594ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // codegen this by promoting to a wider value, the asm will get printed 1595ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // "wrong". 1596f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= InSize < OutSize; 1597ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 1598f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner if (isOperandMentioned(TiedTo, Pieces)) { 1599ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the output, and if the output is the larger 1600ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // value, then it's ok because we'll promote the input to the larger type. 1601f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= OutSize < InSize; 1602806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 16031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1604aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 1605aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // output was a register, just extend the shorter one to the size of the 1606aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // larger one. 1607aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (!SmallerValueMentioned && InputDomain != AD_Other && 1608aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 1609aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 1610f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner 1611935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // Either both of the operands were mentioned or the smaller one was 1612935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // mentioned. One more special case that we'll allow: if the tied input is 1613935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // integer, unmentioned, and is a constant, then we'll allow truncating it 1614935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // down to the size of the destination. 1615935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (InputDomain == AD_Int && OutputDomain == AD_Int && 1616935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner !isOperandMentioned(InputOpNo, Pieces) && 1617935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner InputExpr->isEvaluatable(Context)) { 1618935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner ImpCastExprToType(InputExpr, OutTy, CK_IntegralCast); 1619935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Exprs[InputOpNo] = InputExpr; 1620935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner NS->setInputExpr(i, InputExpr); 1621935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner continue; 1622935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner } 1623935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner 1624c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 1625806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 16267adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 1627806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 1628806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 1629806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 16301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1631fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 1632fe795956194141c91ae555985c9b930595bff43fChris Lattner} 16333b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 163460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1635431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 1636d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall SourceLocation RParen, Decl *Parm, 16379ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *Body) { 1638d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall VarDecl *Var = cast_or_null<VarDecl>(Parm); 1639160b5630aa781ac348303e1ae088d27016637778Douglas Gregor if (Var && Var->isInvalidDecl()) 1640160b5630aa781ac348303e1ae088d27016637778Douglas Gregor return StmtError(); 1641dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 16429ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtCatchStmt(AtLoc, RParen, Var, Body)); 16433b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 16443b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 164560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 16469ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body) { 16479ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, Body)); 1648161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 1649bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 165060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1651dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 16529ae2f076ca5ab1feb3ba95629099ec2319833701John McCall MultiStmtArg CatchStmts, Stmt *Finally) { 1653da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson if (!getLangOptions().ObjCExceptions) 1654da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@try"; 1655da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 1656781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 16578f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor unsigned NumCatchStmts = CatchStmts.size(); 16589ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(ObjCAtTryStmt::Create(Context, AtLoc, Try, 16599ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CatchStmts.release(), 16608f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor NumCatchStmts, 16619ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Finally)); 1662bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 1663bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 166460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::BuildObjCAtThrowStmt(SourceLocation AtLoc, 16659ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Throw) { 1666d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (Throw) { 16675e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall DefaultLvalueConversion(Throw); 16685e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 1669d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor QualType ThrowType = Throw->getType(); 1670d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor // Make sure the expression type is an ObjC pointer or "void *". 1671d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!ThrowType->isDependentType() && 1672d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor !ThrowType->isObjCObjectPointerType()) { 1673d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor const PointerType *PT = ThrowType->getAs<PointerType>(); 1674d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!PT || !PT->getPointeeType()->isVoidType()) 1675d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 1676d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor << Throw->getType() << Throw->getSourceRange()); 1677d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 1678d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 1679dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 16809ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtThrowStmt(AtLoc, Throw)); 1681d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor} 1682d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor 168360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1684dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1685d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor Scope *CurScope) { 1686da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson if (!getLangOptions().ObjCExceptions) 1687da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@throw"; 1688da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 16899ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Throw) { 1690e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 1691e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 1692e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 1693e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 1694e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 1695e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 16964ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 1697dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 1698dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 16999ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return BuildObjCAtThrowStmt(AtLoc, Throw); 170039f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 1701bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 170260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 17039ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, Expr *SyncExpr, 17049ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SyncBody) { 1705781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 170646c3c4ba78766ac0f1c5ec631b424773e21f5271Chris Lattner 17075e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall DefaultLvalueConversion(SyncExpr); 17085e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 1709a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 17108fdc13a78a43f09ac396e682c35d57ca0b48216dDouglas Gregor if (!SyncExpr->getType()->isDependentType() && 17118fdc13a78a43f09ac396e682c35d57ca0b48216dDouglas Gregor !SyncExpr->getType()->isObjCObjectPointerType()) { 17126217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const PointerType *PT = SyncExpr->getType()->getAs<PointerType>(); 1713a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner if (!PT || !PT->getPointeeType()->isVoidType()) 1714a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner return StmtError(Diag(AtLoc, diag::error_objc_synchronized_expects_object) 1715a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner << SyncExpr->getType() << SyncExpr->getSourceRange()); 1716a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 17171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17189ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, SyncExpr, SyncBody)); 1719fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 17204b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 17214b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 17224b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 172360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1724d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, Decl *ExDecl, 17259ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *HandlerBlock) { 17264b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 17278189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 1728d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall cast_or_null<VarDecl>(ExDecl), 17299ae2f076ca5ab1feb3ba95629099ec2319833701John McCall HandlerBlock)); 17304b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 17318351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 17323c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 17333c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 1734c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlclass TypeWithHandler { 1735c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType t; 1736c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *stmt; 1737c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlpublic: 1738c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler(const QualType &type, CXXCatchStmt *statement) 1739c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl : t(type), stmt(statement) {} 1740c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 17410953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // An arbitrary order is fine as long as it places identical 17420953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // types next to each other. 1743c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator<(const TypeWithHandler &y) const { 17440953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() < y.t.getAsOpaquePtr()) 1745c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return true; 17460953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() > y.t.getAsOpaquePtr()) 1747c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return false; 1748c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl else 1749c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return getTypeSpecStartLoc() < y.getTypeSpecStartLoc(); 1750c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 17511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1752c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator==(const TypeWithHandler& other) const { 17530953e767ff7817f97b3ab20896b229891eeff45bJohn McCall return t == other.t; 1754c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 17551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1756c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *getCatchStmt() const { return stmt; } 1757c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl SourceLocation getTypeSpecStartLoc() const { 1758c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return stmt->getExceptionDecl()->getTypeSpecStartLoc(); 1759c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 1760c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl}; 1761c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 17623c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 17633c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 17648351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 17658351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 176660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 17679ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 17688351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 17697f11d9cf5df1f8ce82af46eabc4ec5cec7d580b0Anders Carlsson if (!getLangOptions().Exceptions) 1770b1fba3145392dc0cf54691576a4e6141e5081869Anders Carlsson Diag(TryLoc, diag::err_exceptions_disabled) << "try"; 17717f11d9cf5df1f8ce82af46eabc4ec5cec7d580b0Anders Carlsson 17728351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 17738351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 17748351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 17759ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt **Handlers = RawHandlers.get(); 17768351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 1777c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::SmallVector<TypeWithHandler, 8> TypesWithHandlers; 17781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (unsigned i = 0; i < NumHandlers; ++i) { 17808351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl CXXCatchStmt *Handler = llvm::cast<CXXCatchStmt>(Handlers[i]); 1781c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (!Handler->getExceptionDecl()) { 1782c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (i < NumHandlers - 1) 1783c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return StmtError(Diag(Handler->getLocStart(), 1784c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::err_early_catch_all)); 17851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1786c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl continue; 1787c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 17881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1789c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CaughtType = Handler->getCaughtType(); 1790c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CanonicalCaughtType = Context.getCanonicalType(CaughtType); 1791c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypesWithHandlers.push_back(TypeWithHandler(CanonicalCaughtType, Handler)); 1792c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 1793c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 1794c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl // Detect handlers for the same type as an earlier one. 1795c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (NumHandlers > 1) { 1796c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::array_pod_sort(TypesWithHandlers.begin(), TypesWithHandlers.end()); 17971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1798c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler prev = TypesWithHandlers[0]; 1799c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl for (unsigned i = 1; i < TypesWithHandlers.size(); ++i) { 1800c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler curr = TypesWithHandlers[i]; 18011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1802c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (curr == prev) { 1803c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(curr.getTypeSpecStartLoc(), 1804c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::warn_exception_caught_by_earlier_handler) 1805c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << curr.getCatchStmt()->getCaughtType().getAsString(); 1806c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(prev.getTypeSpecStartLoc(), 1807c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::note_previous_exception_handler) 1808c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << prev.getCatchStmt()->getCaughtType().getAsString(); 1809c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 18101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1811c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl prev = curr; 1812c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 18138351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 18141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1815781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 1816b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 18178351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 18188351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 18198351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 18208351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 18218351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 18228351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 18239ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(CXXTryStmt::Create(Context, TryLoc, TryBlock, 1824a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig Handlers, NumHandlers)); 18258351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 1826