SemaStmt.cpp revision 429bb276991ff2dbc7c5b438828b9b7737cb15eb
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 LabelStmt *LS = new (Context) LabelStmt(IdentLoc, TheDecl, SubStmt); 249ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setStmt(LS); 250203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara if (!TheDecl->isGnuLocal()) 251203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara TheDecl->setLocation(IdentLoc); 252ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(LS); 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 25560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 256d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, Decl *CondVar, 25744aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *thenStmt, SourceLocation ElseLoc, 25844aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *elseStmt) { 25960d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(CondVal.release()); 2601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2618cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor VarDecl *ConditionVar = 0; 262d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 263d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 264586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, IfLoc, true); 26599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 26699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 2678cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor } 26899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 26999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 27099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 271dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 272754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(thenStmt); 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2742d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 2752d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 2762d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 2772d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 278b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek // 2799ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!elseStmt) { 2802d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 281a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // But do not warn if the body is a macro that expands to nothing, e.g: 282a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 283a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // #define CALL(x) 284a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // if (condition) 285a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // CALL(0); 286a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 28744aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis if (!stmt->hasLeadingEmptyMacro()) 288b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 2892d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 2902d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 291754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(elseStmt); 2921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 293dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) IfStmt(Context, IfLoc, ConditionVar, ConditionExpr, 29444aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis thenStmt, ElseLoc, elseStmt)); 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 297f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 298f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 299f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 300f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 301f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 3021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, 303f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 304f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 305f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 306f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 3079f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(NewWidth); 308f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 309f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor 310f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // If the input was signed and negative and the output is 311f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // unsigned, don't bother to warn: this is implementation-defined 312f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // behavior. 313f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 314f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 315f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 316f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 3179f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.trunc(NewWidth); 318b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 3199f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.extend(Val.getBitWidth()); 320b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 321f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 322d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 3231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 324f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 325f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 3269f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(NewWidth); 327b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 328f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 329f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 330f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 331dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // We don't diagnose this overflow, because it is implementation-defined 3322853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // behavior. 3332853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 334f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 335f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 336f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 337f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 338f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3390471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3400471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3410471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3420471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3430471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3440471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3450e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3460e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3470e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3480e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3490471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3500471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3510471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3520471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3530471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3540471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3550471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 356764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 357764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 358764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 359764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 360764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 361764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 362764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 363764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 364764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 365764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 366764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 367764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 368764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 369764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 370ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// CmpEnumVals - Comparison predicate for sorting enumeration values. 371ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 372ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool CmpEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 373ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 374ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 375ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first < rhs.first; 376ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 377ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 378ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// EqEnumVals - Comparison preficate for uniqing enumeration values. 379ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 380ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool EqEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 381ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 382ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 383ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first == rhs.first; 384ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 385ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 3865f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// GetTypeBeforeIntegralPromotion - Returns the pre-promotion type of 3875f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// potentially integral-promoted expression @p expr. 3885f04881eb025f61396d0555d8173730fe2759e0aChris Lattnerstatic QualType GetTypeBeforeIntegralPromotion(const Expr* expr) { 3896907fbe758d23e1aec4c0a67e7b633d1d855feb4John McCall if (const CastExpr *ImplicitCast = dyn_cast<ImplicitCastExpr>(expr)) { 3905f04881eb025f61396d0555d8173730fe2759e0aChris Lattner const Expr *ExprBeforePromotion = ImplicitCast->getSubExpr(); 3915f04881eb025f61396d0555d8173730fe2759e0aChris Lattner QualType TypeBeforePromotion = ExprBeforePromotion->getType(); 3922ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (TypeBeforePromotion->isIntegralOrEnumerationType()) { 3935f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return TypeBeforePromotion; 3945f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 3955f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 3965f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return expr->getType(); 3975f04881eb025f61396d0555d8173730fe2759e0aChris Lattner} 3985f04881eb025f61396d0555d8173730fe2759e0aChris Lattner 39960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 400dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, Expr *Cond, 401d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall Decl *CondVar) { 40260d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult; 4039ae2f076ca5ab1feb3ba95629099ec2319833701John McCall 404586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor VarDecl *ConditionVar = 0; 405d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 406d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 4079ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult = CheckConditionVariable(ConditionVar, SourceLocation(), false); 4089ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 409586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 410dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4119ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.release(); 412586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 413dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4149ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Cond) 415586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 416dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4179ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult 418dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = ConvertToIntegralOrEnumerationType(SwitchLoc, Cond, 419c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_typecheck_statement_requires_integer), 420c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_incomplete_class_type) 4219ae2f076ca5ab1feb3ba95629099ec2319833701John McCall << Cond->getSourceRange(), 422c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_explicit_conversion), 423c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::note_switch_conversion), 424c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_multiple_conversions), 4256bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(diag::note_switch_conversion), 4266bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(0)); 4279ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) return StmtError(); 4289ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 429dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 430d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (!CondVar) { 431b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, SwitchLoc); 4324765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall CondResult = MaybeCreateExprWithCleanups(Cond); 4339ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 434586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 4359ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 436586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 437b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 438781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchIntoScope(); 439dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4409ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = new (Context) SwitchStmt(Context, ConditionVar, Cond); 441781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.push_back(SS); 442586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return Owned(SS); 4437e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner} 4447e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner 44528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greifstatic void AdjustAPSInt(llvm::APSInt &Val, unsigned BitWidth, bool IsSigned) { 44628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif if (Val.getBitWidth() < BitWidth) 4479f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(BitWidth); 44828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif else if (Val.getBitWidth() > BitWidth) 4499f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(BitWidth); 45028164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Val.setIsSigned(IsSigned); 45128164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif} 45228164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif 45360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 4549ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, Stmt *Switch, 4559ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *BodyStmt) { 4569ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = cast<SwitchStmt>(Switch); 457781472fe99a120098c631b0cbe33c89f8cef5e70John McCall assert(SS == getCurFunction()->SwitchStack.back() && 458781472fe99a120098c631b0cbe33c89f8cef5e70John McCall "switch stack missing push/pop!"); 459de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 4609dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 461781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.pop_back(); 462c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 463ff331c15729f7d4439d253c97f4d60f2a7ffd0c6Douglas Gregor if (SS->getCond() == 0) 464be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor return StmtError(); 465dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 466f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 4670fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr *CondExprBeforePromotion = CondExpr; 46884fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor QualType CondTypeBeforePromotion = 46984fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor GetTypeBeforeIntegralPromotion(CondExpr); 470de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 4710de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 472429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult CondResult = UsualUnaryConversions(CondExpr); 473429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (CondResult.isInvalid()) 474429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 475429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CondExpr = CondResult.take(); 476a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor QualType CondType = CondExpr->getType(); 47784fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor SS->setCond(CondExpr); 47884fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor 4795f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // C++ 6.4.2.p2: 4805f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // Integral promotions are performed (on the switch condition). 4815f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // 4825f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // A case value unrepresentable by the original switch condition 4835f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // type (before the promotion) doesn't make sense, even when it can 4845f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // be represented by the promoted type. Therefore we need to find 4855f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // the pre-promotion type of the switch condition. 48612356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondExpr->isTypeDependent()) { 487acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // We have already converted the expression to an integral or enumeration 488dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // type, when we started the switch statement. If we don't have an 489acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // appropriate type now, just return an error. 490acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor if (!CondType->isIntegralOrEnumerationType()) 49112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan return StmtError(); 49212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan 4932b334bb3126a67895813e49e6228dad4aec0b4d6Chris Lattner if (CondExpr->isKnownToHaveBooleanValue()) { 49412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(bool_expr) {...} is often a programmer error, e.g. 49512356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(n && mask) { ... } // Doh - should be "n & mask". 49612356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // One can always use an if statement instead of switch(bool_expr). 49712356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::warn_bool_switch_condition) 49812356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondExpr->getSourceRange(); 49912356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 500c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 501de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 502f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 503f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 5041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HasDependentValue 505dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 5061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned CondWidth 5071d6ab7af99a1fc059a6aa5da083640c1d94b07f7Chris Lattner = HasDependentValue ? 0 : Context.getIntWidth(CondTypeBeforePromotion); 5085f04881eb025f61396d0555d8173730fe2759e0aChris Lattner bool CondIsSigned = CondTypeBeforePromotion->isSignedIntegerType(); 5091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 510f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 511f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 512f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 5130471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner typedef llvm::SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 5140471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 5151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 516f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 517ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRangesTy; 518ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy CaseRanges; 5191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 520f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 5211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 522b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 5231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 524dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 525c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 5261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 527c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 528f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 529f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 5305f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 531de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 532f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 533390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 534390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 535390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 536b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 537c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 538f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 5391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 540f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 541f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 5421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 543f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 544f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 5451e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 546dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 547dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 548dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 549dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 550dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 5511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 55251fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 5531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 554f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 555f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 55628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Lo->getLocStart(), 557f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 5586c36be5b383875b490684bcf439d6d427298c1afChris Lattner 5591e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 5601e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 561429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Lo = ImpCastExprToType(Lo, CondType, CK_IntegralCast).take(); 5621e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 5631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 564b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 565dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 5661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CS->getRHS()->isTypeDependent() || 567dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 568dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 569dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 570dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 571f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 5721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 573b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 574f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 575f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 576b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 577dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 5780fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // If we don't have a default statement, check whether the 5790fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // condition is constant. 5800fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt ConstantCondValue; 5810fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool HasConstantCond = false; 5820fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool ShouldCheckConstantCond = false; 5830fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!HasDependentValue && !TheDefaultStmt) { 5840fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr::EvalResult Result; 5850fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall HasConstantCond = CondExprBeforePromotion->Evaluate(Result, Context); 5860fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (HasConstantCond) { 5870fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(Result.Val.isInt() && "switch condition evaluated to non-int"); 5880fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue = Result.Val.getInt(); 5890fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = true; 5900fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 5910fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(ConstantCondValue.getBitWidth() == CondWidth && 5920fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue.isSigned() == CondIsSigned); 5930fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 5940fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 5950fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 596dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 597dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 598dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 599dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 6000fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (unsigned i = 0, e = CaseVals.size(); i != e; ++i) { 6010fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 6020fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CaseVals[i].first == ConstantCondValue) 6030fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6040fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6050fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (i != 0 && CaseVals[i].first == CaseVals[i-1].first) { 606dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 6071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(CaseVals[i].second->getLHS()->getLocStart(), 6080fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall diag::err_duplicate_case) << CaseVals[i].first.toString(10); 6090fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CaseVals[i-1].second->getLHS()->getLocStart(), 610dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 611390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 612390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 613dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 614dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6156efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 616b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 6171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 618dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 619dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 620dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 621dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 622dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 623dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 6241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 625dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 626dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 627dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 6280fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt &LoVal = CaseRanges[i].first; 629dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 630dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 631dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 633dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 634dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 63528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocStart(), 636dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 6371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 638dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the LHS is not the same type as the condition, insert an implicit 639dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // cast. 640429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Hi = ImpCastExprToType(Hi, CondType, CK_IntegralCast).take(); 641dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 6421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 643dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 6440fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (LoVal > HiVal) { 645dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 646dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 64728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocEnd()); 648dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 649dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 650dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 651dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6520fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6530fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 6540fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall LoVal <= ConstantCondValue && 6550fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue <= HiVal) 6560fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6570fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 658dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 6590471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 6601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 661dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 662dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 663dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 664dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 665dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 666dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 667dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 6681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 669dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 670dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 671dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 672dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 6731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 674dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 675dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 676dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 677dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 678dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 679dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 680dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 681dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 682dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 684dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 685dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 686dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 687dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 688dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 689dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 691dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 692dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 693dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 694dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 695dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 696dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 698dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 699dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 700dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 701dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 7021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(OverlapStmt->getLHS()->getLocStart(), 703dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 704390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 705390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 706dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 707dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7080471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 709b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 710ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7110fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Complain if we have a constant condition and we didn't find a match. 7120fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!CaseListIsErroneous && ShouldCheckConstantCond) { 7130fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // TODO: it would be nice if we printed enums as enums, chars as 7140fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // chars, etc. 7150fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CondExpr->getExprLoc(), diag::warn_missing_case_for_condition) 7160fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ConstantCondValue.toString(10) 7170fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << CondExpr->getSourceRange(); 7180fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 7190fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7200fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Check to see if switch is over an Enum and handles all of its 721559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // values. We only issue a warning if there is not 'default:', but 722559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // we still do the analysis to preserve this information in the AST 723559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // (which can be used by flow-based analyes). 7240fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // 725ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner const EnumType *ET = CondTypeBeforePromotion->getAs<EnumType>(); 726559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 727ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // If switch has default case, then ignore it. 728559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!CaseListIsErroneous && !HasConstantCond && ET) { 729ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const EnumDecl *ED = ET->getDecl(); 730ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef llvm::SmallVector<std::pair<llvm::APSInt, EnumConstantDecl*>, 64> EnumValsTy; 731ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy EnumVals; 732ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7330fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Gather all enum values, set their type and sort them, 7340fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // allowing easier comparison with CaseVals. 7350fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (EnumDecl::enumerator_iterator EDI = ED->enumerator_begin(); 73628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EDI != ED->enumerator_end(); ++EDI) { 73728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif llvm::APSInt Val = EDI->getInitVal(); 73828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Val, CondWidth, CondIsSigned); 73928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EnumVals.push_back(std::make_pair(Val, *EDI)); 740ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 741ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor std::stable_sort(EnumVals.begin(), EnumVals.end(), CmpEnumVals); 7420fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall EnumValsTy::iterator EIend = 7430fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall std::unique(EnumVals.begin(), EnumVals.end(), EqEnumVals); 744559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 745559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // See which case values aren't in enum. 746559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // TODO: we might want to check whether case values are out of the 747559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // enum even if we don't want to check whether all cases are handled. 748559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!TheDefaultStmt) { 74947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EnumValsTy::const_iterator EI = EnumVals.begin(); 75047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseValsTy::const_iterator CI = CaseVals.begin(); 7510fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CI != CaseVals.end(); CI++) { 75247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < CI->first) 75347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 75447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first > CI->first) 7550fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 7560fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ED->getDeclName(); 75747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 75847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek // See which of case ranges aren't in enum 75947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI = EnumVals.begin(); 76047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseRangesTy::const_iterator RI = CaseRanges.begin(); 7610fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall RI != CaseRanges.end() && EI != EIend; RI++) { 76247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < RI->first) 76347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 764dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 76547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != RI->first) { 76647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 76747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 76847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 769e0ba9d1beeba01a96808c2fc61f9ca89acec313bTed Kremenek 77047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 77128164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 77247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < Hi) 77347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 77447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != Hi) 77547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getRHS()->getExprLoc(), diag::warn_not_in_enum) 77647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 77747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 778ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 779dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 780559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Check which enum vals aren't in switch 781ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseValsTy::const_iterator CI = CaseVals.begin(); 782ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy::const_iterator RI = CaseRanges.begin(); 783559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek bool hasCasesNotInSwitch = false; 784559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 785ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner llvm::SmallVector<DeclarationName,8> UnhandledNames; 786dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 787559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek for (EnumValsTy::const_iterator EI = EnumVals.begin(); EI != EIend; EI++){ 788ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Drop unneeded case values 789ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt CIVal; 790ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (CI != CaseVals.end() && CI->first < EI->first) 791ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CI++; 792dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 793ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (CI != CaseVals.end() && CI->first == EI->first) 794ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor continue; 795ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 796559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Drop unneeded case ranges 797ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (; RI != CaseRanges.end(); RI++) { 798ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 79928164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 800ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI->first <= Hi) 801ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor break; 802ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 803ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 804559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (RI == CaseRanges.end() || EI->first < RI->first) { 80547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek hasCasesNotInSwitch = true; 80647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (!TheDefaultStmt) 807ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner UnhandledNames.push_back(EI->second->getDeclName()); 80847bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 809ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 810dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 811ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Produce a nice diagnostic if multiple values aren't handled. 812ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner switch (UnhandledNames.size()) { 813ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 0: break; 814ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 1: 815ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case1) 816ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0]; 817ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 818ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 2: 819ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case2) 820ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1]; 821ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 822ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 3: 823ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case3) 824ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 825ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 826ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner default: 827ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_cases) 828ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << (unsigned)UnhandledNames.size() 829ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 830ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 831ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner } 832559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 833559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!hasCasesNotInSwitch) 83447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek SS->setAllEnumCasesCovered(); 835ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 836b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 837dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 838390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 839390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 840b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 841de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 842de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 843de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 8445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 84660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 847dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, 8489ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Decl *CondVar, Stmt *Body) { 84960d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(Cond.release()); 850dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8515656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor VarDecl *ConditionVar = 0; 852d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 853d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 854586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, WhileLoc, true); 85599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 85699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 8575656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor } 8589ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *ConditionExpr = CondResult.take(); 85999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 86099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 861dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8629ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 8631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86443dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor return Owned(new (Context) WhileStmt(Context, ConditionVar, ConditionExpr, 8659ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Body, WhileLoc)); 8665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 86860d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 8699ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 870989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 8719ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Cond, SourceLocation CondRParen) { 8729ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert(Cond && "ActOnDoStmt(): missing expression"); 873f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 874429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult CondResult = CheckBooleanCondition(Cond, DoLoc); 875429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (CondResult.isInvalid() || CondResult.isInvalid()) 8765a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 877429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Cond = CondResult.take(); 8785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 879b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, DoLoc); 880429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CondResult = MaybeCreateExprWithCleanups(Cond); 8819ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 882586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 8839ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 884dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8859ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 886754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 8879ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) DoStmt(Body, Cond, DoLoc, WhileLoc, CondRParen)); 8885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 89060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 891f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 8929ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, FullExprArg second, Decl *secondVar, 89399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor FullExprArg third, 8949ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 8955921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 8965921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 897f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 898f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 899f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 9005921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 9015921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 9025921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 903b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD && VD->isLocalVarDecl() && !VD->hasLocalStorage()) 9045921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 9055921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 9065921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 9075921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 9085921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 909ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 9105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 91199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 91260d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult SecondResult(second.release()); 91399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor VarDecl *ConditionVar = 0; 914d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (secondVar) { 915d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(secondVar); 916586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor SecondResult = CheckConditionVariable(ConditionVar, ForLoc, true); 91799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (SecondResult.isInvalid()) 91899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 91999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor } 920dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 92199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Third = third.release().takeAs<Expr>(); 922dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9233af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(First); 9243af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(Third); 925754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(Body); 926754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 927dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) ForStmt(Context, First, 928dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi SecondResult.take(), ConditionVar, 929dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Third, Body, ForLoc, LParenLoc, 93043dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor RParenLoc)); 9315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 933f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// In an Objective C collection iteration statement: 934f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// for (x in y) 935f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// x can be an arbitrary l-value expression. Bind it up as a 936f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// full-expression. 937f6a1648197562e0b133440d612d9af297d0a86ccJohn McCallStmtResult Sema::ActOnForEachLValueExpr(Expr *E) { 938f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall CheckImplicitConversions(E); 9394765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall ExprResult Result = MaybeCreateExprWithCleanups(E); 940f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall if (Result.isInvalid()) return StmtError(); 941f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall return Owned(static_cast<Stmt*>(Result.get())); 942f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall} 943f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall 94460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 945f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 946f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 9479ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, Expr *Second, 9489ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 94920552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 95020552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 95120552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 9527e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 953f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 954f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 955f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 9567e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner Decl *D = DS->getSingleDecl(); 957f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek FirstType = cast<ValueDecl>(D)->getType(); 958f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 959f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 960f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 961248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff VarDecl *VD = cast<VarDecl>(D); 962b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD->isLocalVarDecl() && !VD->hasLocalStorage()) 963f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(VD->getLocation(), 964f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 9651fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 966c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor Expr *FirstE = cast<Expr>(First); 9677eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (!FirstE->isTypeDependent() && !FirstE->isLValue()) 968f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 969f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 970f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 9711fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 9721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FirstType = static_cast<Expr*>(First)->getType(); 9731fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 974c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (!FirstType->isDependentType() && 975c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor !FirstType->isObjCObjectPointerType() && 976a5e42a82ce055f29f3733f3a1f10da6cb9877deeFariborz Jahanian !FirstType->isBlockPointerType()) 977dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 978d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 9793ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 980c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (Second && !Second->isTypeDependent()) { 981429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(Second); 982429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 983429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 984429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Second = Result.take(); 9853ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian QualType SecondType = Second->getType(); 986f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!SecondType->isObjCObjectPointerType()) 987dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_collection_expr_type) 988d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 989ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian else if (const ObjCObjectPointerType *OPT = 990ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian SecondType->getAsObjCInterfacePointerType()) { 991ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian llvm::SmallVector<IdentifierInfo *, 4> KeyIdents; 992dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi IdentifierInfo* selIdent = 993ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian &Context.Idents.get("countByEnumeratingWithState"); 994ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 995ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian selIdent = &Context.Idents.get("objects"); 996ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 997ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian selIdent = &Context.Idents.get("count"); 998ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 999ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian Selector CSelector = Context.Selectors.getSelector(3, &KeyIdents[0]); 1000ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian if (ObjCInterfaceDecl *IDecl = OPT->getInterfaceDecl()) { 1001dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!IDecl->isForwardDecl() && 100261478065fbcafcf5295bb0fb796c9a92f2d861e0Fariborz Jahanian !IDecl->lookupInstanceMethod(CSelector) && 100361478065fbcafcf5295bb0fb796c9a92f2d861e0Fariborz Jahanian !LookupMethodInQualifiedType(CSelector, OPT, true)) { 100480a785c2452c73b7c41d4a867edcf5a090c78c46Fariborz Jahanian // Must further look into private implementation methods. 1005ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian if (!LookupPrivateInstanceMethod(CSelector, IDecl)) 1006ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian Diag(ForLoc, diag::warn_collection_expr_type) 1007ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian << SecondType << CSelector << Second->getSourceRange(); 1008ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 1009ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 1010ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 10113ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 10128189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 10138189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 10143ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 10155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 101657ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerStmtResult Sema::ActOnGotoStmt(SourceLocation GotoLoc, 101757ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation LabelLoc, 101857ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner LabelDecl *TheDecl) { 101957ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner getCurFunction()->setHasBranchIntoScope(); 1020ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setUsed(); 1021ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(new (Context) GotoStmt(TheDecl, GotoLoc, LabelLoc)); 10225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 102460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1025ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 10269ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E) { 1027bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 10285f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 10295f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 10302877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth QualType DestTy = Context.getPointerType(Context.VoidTy.withConst()); 1031429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult ExprRes = Owned(E); 10325f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 1033429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CheckSingleAssignmentConstraints(DestTy, ExprRes); 1034429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (ExprRes.isInvalid()) 1035429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1036429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley E = ExprRes.take(); 10372877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth if (DiagnoseAssignmentResult(ConvTy, StarLoc, DestTy, ETy, E, AA_Passing)) 10385f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 10395f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 1040b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 1041781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasIndirectGoto(); 1042b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 10435f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 10445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 104660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 10471b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 10485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 10495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 10505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 10514cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 10525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10534cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10548189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 10555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 105760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 10581b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 10595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 10605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 10615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 10624cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 10635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10644cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10658189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 10665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1068dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \brief Determine whether the given expression is a candidate for 1069f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// copy elision in either a return statement or a throw expression. 10705077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1071f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param ReturnType If we're determining the copy elision candidate for 1072f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// a return statement, this is the return type of the function. If we're 1073f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// determining the copy elision candidate for a throw expression, this will 1074f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// be a NULL type. 10755077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1076f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param E The expression being returned from the function or block, or 1077f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// being thrown. 10785077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1079f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param AllowFunctionParameter 10805077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 10815077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \returns The NRVO candidate variable, if the return statement may use the 10825077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// NRVO, or NULL if there is no such candidate. 1083f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregorconst VarDecl *Sema::getCopyElisionCandidate(QualType ReturnType, 1084f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor Expr *E, 1085f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor bool AllowFunctionParameter) { 1086f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor QualType ExprType = E->getType(); 10873c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // - in a return statement in a function with ... 10883c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // ... a class return type ... 1089f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType.isNull()) { 1090f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType->isRecordType()) 1091f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1092f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // ... the same cv-unqualified type as the function return type ... 1093f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!Context.hasSameUnqualifiedType(ReturnType, ExprType)) 1094f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1095f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor } 1096dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1097dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // ... the expression is the name of a non-volatile automatic object 1098f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // (other than a function or catch-clause parameter)) ... 1099f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(E->IgnoreParens()); 11003c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!DR) 11015077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 11023c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 11033c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!VD) 11045077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 1105dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1106f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (VD->hasLocalStorage() && !VD->isExceptionVariable() && 1107d86c477fb5d3fc34864afecbbb5443da9355e8fbDouglas Gregor !VD->getType()->isReferenceType() && !VD->hasAttr<BlocksAttr>() && 1108f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor !VD->getType().isVolatileQualified() && 11094a46c77813af1241139b81a086b539e4d734cb86Douglas Gregor ((VD->getKind() == Decl::Var) || 11104a46c77813af1241139b81a086b539e4d734cb86Douglas Gregor (AllowFunctionParameter && VD->getKind() == Decl::ParmVar))) 11115077c3876beeaed32280af88244e8050078619a8Douglas Gregor return VD; 1112dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 11135077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 11143c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor} 11153c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor 111607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// \brief Perform the initialization of a potentially-movable value, which 111707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// is the result of return value. 1118cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// 1119cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// This routine implements C++0x [class.copy]p33, which attempts to treat 1120cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// returned lvalues as rvalues in certain cases (to prefer move construction), 1121cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// then falls back to treating them as lvalues if that failed. 1122dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiExprResult 112307f402cff25354c5f06f307f19b0c57c09d964bdDouglas GregorSema::PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 112407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor const VarDecl *NRVOCandidate, 112507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor QualType ResultType, 112607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Expr *Value) { 1127cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // C++0x [class.copy]p33: 1128dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // When the criteria for elision of a copy operation are met or would 1129dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // be met save for the fact that the source object is a function 1130dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // parameter, and the object to be copied is designated by an lvalue, 1131cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // overload resolution to select the constructor for the copy is first 1132cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // performed as if the object were designated by an rvalue. 1133cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor ExprResult Res = ExprError(); 113407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor if (NRVOCandidate || getCopyElisionCandidate(ResultType, Value, true)) { 1135dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ImplicitCastExpr AsRvalue(ImplicitCastExpr::OnStack, 113607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getType(), CK_LValueToRValue, 113707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value, VK_XValue); 1138dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1139cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Expr *InitExpr = &AsRvalue; 1140dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializationKind Kind 114107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = InitializationKind::CreateCopy(Value->getLocStart(), 114207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getLocStart()); 114307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor InitializationSequence Seq(*this, Entity, Kind, &InitExpr, 1); 1144dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1145dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // [...] If overload resolution fails, or if the type of the first 1146cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // parameter of the selected constructor is not an rvalue reference 11470099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // to the object's type (possibly cv-qualified), overload resolution 1148cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // is performed again, considering the object as an lvalue. 1149cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor if (Seq.getKind() != InitializationSequence::FailedSequence) { 1150cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor for (InitializationSequence::step_iterator Step = Seq.step_begin(), 1151cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor StepEnd = Seq.step_end(); 1152cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Step != StepEnd; ++Step) { 1153dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (Step->Kind 1154cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor != InitializationSequence::SK_ConstructorInitialization) 1155cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor continue; 1156dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1157dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CXXConstructorDecl *Constructor 1158cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor = cast<CXXConstructorDecl>(Step->Function.Function); 1159dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1160cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor const RValueReferenceType *RRefType 116107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = Constructor->getParamDecl(0)->getType() 116207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor ->getAs<RValueReferenceType>(); 1163dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1164cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // If we don't meet the criteria, break out now. 1165dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!RRefType || 116607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor !Context.hasSameUnqualifiedType(RRefType->getPointeeType(), 116707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Context.getTypeDeclType(Constructor->getParent()))) 1168cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor break; 1169dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1170cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Promote "AsRvalue" to the heap, since we now need this 1171cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // expression node to persist. 117207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value = ImplicitCastExpr::Create(Context, Value->getType(), 1173dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CK_LValueToRValue, Value, 0, 117407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor VK_XValue); 1175dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1176cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Complete type-checking the initialization of the return type 1177cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // using the constructor we found. 117807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = Seq.Perform(*this, Entity, Kind, MultiExprArg(&Value, 1)); 1179cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1180cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1181cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1182dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1183cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Either we didn't meet the criteria for treating an lvalue as an rvalue, 1184dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // above, or overload resolution failed. Either way, we need to try 1185cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // (again) now with the return value expression as written. 1186cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor if (Res.isInvalid()) 118707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = PerformCopyInitialization(Entity, SourceLocation(), Value); 1188dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1189cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor return Res; 1190cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor} 1191cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor 119227c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 11934eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 119460d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 11954eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 11964eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 11974eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 11989ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor BlockScopeInfo *CurBlock = getCurBlock(); 11997d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CurBlock->ReturnType.isNull()) { 1200c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 120116564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 120216564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 1203429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(RetValExp); 1204429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1205429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1206429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley RetValExp = Result.take(); 12077d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = RetValExp->getType(); 12087d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(RetValExp)) { 12097d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // We have to remove a 'const' added to copied-in variable which was 12107d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // part of the implementation spec. and not the actual qualifier for 12117d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // the variable. 12127d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CDRE->isConstQualAdded()) 121349f4e1cbd839da27ff4814b4ea6d85a79f786cbdJohn McCall CurBlock->ReturnType.removeLocalConst(); // FIXME: local??? 12147d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian } 1215c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 12167d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = Context.VoidTy; 12174eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 12187d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian QualType FnRetType = CurBlock->ReturnType; 12194cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1220711c52bb20d0c69063b52a99826fb7d2835501f1John McCall if (CurBlock->FunctionType->getAs<FunctionType>()->getNoReturnAttr()) { 12216c92fa75e62937f9738696840efcb258560f4568Mike Stump Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr) 12226c92fa75e62937f9738696840efcb258560f4568Mike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 12236c92fa75e62937f9738696840efcb258560f4568Mike Stump return StmtError(); 12246c92fa75e62937f9738696840efcb258560f4568Mike Stump } 12256c92fa75e62937f9738696840efcb258560f4568Mike Stump 12264eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 12274eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 12284eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 12295077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 12304eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 12314eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) { 12324eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 12334eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 12344eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 12355077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 12365077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp) { 12374cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 12385077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 12395077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 1240dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 12415077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 12425077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void block with an expression, continue checking 12435077c3876beeaed32280af88244e8050078619a8Douglas Gregor 12445077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 12455077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 12465077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 12475077c3876beeaed32280af88244e8050078619a8Douglas Gregor 12485077c3876beeaed32280af88244e8050078619a8Douglas Gregor // In C++ the return statement is handled via a copy initialization. 12495077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 1250f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 1251dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 125207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 125307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor NRVOCandidate != 0); 1254dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 125507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 12565077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 12575077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 12585077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 12595077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 1260dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1261b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1262b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 12634765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1264b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 12654cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 12665077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 1267dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 12685077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 1269c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson } 1270dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 12715077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 127298eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 12734cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1274dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 12755077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 12765077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 12775077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 12785077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1279dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 12805077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 12814eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 12825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 128360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 12849ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 12859ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor if (getCurBlock()) 12864eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 12874cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1288371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 1289f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 1290371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 129104a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall if (FD->hasAttr<NoReturnAttr>() || 129204a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall FD->getType()->getAs<FunctionType>()->getNoReturnAttr()) 12938662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 1294f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 1295f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump } else if (ObjCMethodDecl *MD = getCurMethodDecl()) 1296c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff FnRetType = MD->getResultType(); 1297c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff else // If we don't have a function/method context, bail. 1298c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 12991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13005077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 13015cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 13021be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor if (RetValExp && !RetValExp->isTypeDependent()) { 13031be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor // C99 6.8.6.4p1 (ext_ since GCC warns) 130465ce04bef06696379682410f399f37b43996d824Chris Lattner unsigned D = diag::ext_return_has_expr; 130565ce04bef06696379682410f399f37b43996d824Chris Lattner if (RetValExp->getType()->isVoidType()) 130665ce04bef06696379682410f399f37b43996d824Chris Lattner D = diag::ext_return_has_void_expr; 1307f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall else { 1308429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = Owned(RetValExp); 1309429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Result = IgnoredValueConversions(Result.take()); 1310429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1311429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1312429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley RetValExp = Result.take(); 1313429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley RetValExp = ImpCastExprToType(RetValExp, Context.VoidTy, CK_ToVoid).take(); 1314f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall } 13154cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1316e878eb035b343d7d819c092102364ec9849716aeChris Lattner // return (some void expression); is legal in C++. 1317e878eb035b343d7d819c092102364ec9849716aeChris Lattner if (D != diag::ext_return_has_void_expr || 1318e878eb035b343d7d819c092102364ec9849716aeChris Lattner !getLangOptions().CPlusPlus) { 1319e878eb035b343d7d819c092102364ec9849716aeChris Lattner NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 1320e878eb035b343d7d819c092102364ec9849716aeChris Lattner Diag(ReturnLoc, D) 1321e878eb035b343d7d819c092102364ec9849716aeChris Lattner << CurDecl->getDeclName() << isa<ObjCMethodDecl>(CurDecl) 1322e878eb035b343d7d819c092102364ec9849716aeChris Lattner << RetValExp->getSourceRange(); 1323e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 13241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1325b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 13264765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 13275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1328dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 13295077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 13305077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp && !FnRetType->isDependentType()) { 13313c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 13323c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 13333c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 13343c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 13353c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 133608631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 13373c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 133808631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 13395077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc); 13405077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 13415077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 13425077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 13435077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void function with an expression, continue checking 13445077c3876beeaed32280af88244e8050078619a8Douglas Gregor 13455077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 13465077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 13475077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 13485077c3876beeaed32280af88244e8050078619a8Douglas Gregor 13495077c3876beeaed32280af88244e8050078619a8Douglas Gregor // In C++ the return statement is handled via a copy initialization. 13505077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 1351f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 1352dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 135307f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 135407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor NRVOCandidate != 0); 1355dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 135607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 13575077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 13585077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 13595077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 13605077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 13614cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 13625077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 1363dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 13645077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 136566724ea67d7d598b937d86fa66f03f09a1c758f3Douglas Gregor } 1366dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1367b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1368b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 13694765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1370b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 13715077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 1372898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 1373dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1374dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 13755077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 13765077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 13775077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 13785077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1379dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 13805077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 13815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 13825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1383810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 1384810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 1385810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 1386810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 1387810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 1388810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 1389810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 1390810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 1391703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson // Type dependent expressions will be checked during instantiation. 1392703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson if (E->isTypeDependent()) 1393703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson return false; 1394dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 13957eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E->isLValue()) 1396810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 1397810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1398810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 1399810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 1400810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 14017eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E != E2 && E2->isLValue()) { 1402810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (!S.getLangOptions().HeinousExtensions) 1403810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 1404810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1405810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 1406810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 1407810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1408810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 1409810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 1410810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 1411810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1412810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 1413810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 1414810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 1415810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1416ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// isOperandMentioned - Return true if the specified operand # is mentioned 1417ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// anywhere in the decomposed asm string. 1418ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattnerstatic bool isOperandMentioned(unsigned OpNo, 1419ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner llvm::ArrayRef<AsmStmt::AsmStringPiece> AsmStrPieces) { 1420ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner for (unsigned p = 0, e = AsmStrPieces.size(); p != e; ++p) { 1421ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner const AsmStmt::AsmStringPiece &Piece = AsmStrPieces[p]; 1422ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (!Piece.isOperand()) continue; 1423ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1424ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 1425ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 1426ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (Piece.getOperandNo() == OpNo) 1427ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return true; 1428ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 1429ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1430ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return false; 1431ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner} 1432810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1433ca57b4b7658a031b74cda5ac504311998be8e343Chris LattnerStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, bool IsSimple, 1434ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner bool IsVolatile, unsigned NumOutputs, 1435ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner unsigned NumInputs, IdentifierInfo **Names, 1436ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner MultiExprArg constraints, MultiExprArg exprs, 1437ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner Expr *asmString, MultiExprArg clobbers, 1438ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner SourceLocation RParenLoc, bool MSAsm) { 14393037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 14403037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 14413037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 14429ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr **Exprs = exprs.get(); 14439ae2f076ca5ab1feb3ba95629099ec2319833701John McCall StringLiteral *AsmString = cast<StringLiteral>(asmString); 14443037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 14453037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 144603eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson llvm::SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 14471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14481708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 14496bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (AsmString->isWide()) 14503037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 14513037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 14523037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 14531708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 14541708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 14556bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 14563037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 14573037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 14583037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1459ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef OutputName; 1460ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1461ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson OutputName = Names[i]->getName(); 1462ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1463ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 1464432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner if (!Context.Target.validateOutputConstraint(Info)) 14653037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1466432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 1467432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 14683037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1469d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 147072056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 1471810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 147272056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 1473dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 147472056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 147504728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 14761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 147744def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 147804728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 14793037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1480806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner llvm::SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 1481806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 148204728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 14831708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 14846bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 14853037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 14863037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 14873037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1488ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef InputName; 1489ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1490ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson InputName = Names[i]->getName(); 1491ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1492ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 1493beaaccd8e2a8748f77b66e2b330fb9136937e14cJay Foad if (!Context.Target.validateInputConstraint(OutputConstraintInfos.data(), 14942819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 14953037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1496432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 1497432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 1498d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 14993037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 150072056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 15013037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1502d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 150344def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 1504810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 150572056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1506d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 1507432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 150872056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 150904728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 15103037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 151144def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 1512d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 151372056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1514d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 15151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump << InputExpr->getType() << Info.getConstraintStr() 151672056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 1517d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 1518d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 15191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1520429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(Exprs[i]); 1521429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1522429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 15231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1524429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Exprs[i] = Result.take(); 1525806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 152604728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 15273037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 15286fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 15291708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 15301708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 15316bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 15323037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 15333037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 15343037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1535fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson llvm::StringRef Clobber = Literal->getString(); 15363037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1537fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson if (!Context.Target.isValidGCCRegisterName(Clobber)) 15383037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 15397765934ad7e157b5fcf925792a38e01b1edbcf8aDaniel Dunbar diag::err_asm_unknown_register_name) << Clobber); 15406fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 15413037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1542fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 1543dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm, 1544dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NumOutputs, NumInputs, Names, Constraints, Exprs, 1545966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson AsmString, NumClobbers, Clobbers, RParenLoc); 1546fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 1547fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 1548fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner llvm::SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 1549fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 1550fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 15512ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 15522ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 1553fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 1554fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 15551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1556806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 1557806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 1558806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 15591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1560806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 1561806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 1562806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 1563806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 15641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1565806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 1566935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner unsigned InputOpNo = i+NumOutputs; 1567f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 1568935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Expr *InputExpr = Exprs[InputOpNo]; 15697adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 15707adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 15717adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 1572806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 15731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1574aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // Decide if the input and output are in the same domain (integer/ptr or 1575aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // floating point. 1576aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner enum AsmDomain { 1577aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner AD_Int, AD_FP, AD_Other 1578aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner } InputDomain, OutputDomain; 1579dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1580aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (InTy->isIntegerType() || InTy->isPointerType()) 1581aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Int; 15820c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (InTy->isRealFloatingType()) 1583aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_FP; 1584aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 1585aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Other; 15863351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 1587aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutTy->isIntegerType() || OutTy->isPointerType()) 1588aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Int; 15890c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (OutTy->isRealFloatingType()) 1590aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_FP; 1591aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 1592aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Other; 1593dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1594aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // They are ok if they are the same size and in the same domain. This 1595aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // allows tying things like: 1596aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int* 1597aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int if they are the same size. 1598aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // double to long double if they are the same size. 1599dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // 1600aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 1601aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 1602aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutSize == InSize && InputDomain == OutputDomain && 1603aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain != AD_Other) 1604aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 1605dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1606aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 1607f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // then we can promote the smaller one to a larger input and the asm string 1608f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // won't notice. 1609aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner bool SmallerValueMentioned = false; 1610ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1611ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 1612ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 1613935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (isOperandMentioned(InputOpNo, Pieces)) { 1614ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // This is a use in the asm string of the smaller operand. Since we 1615ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // codegen this by promoting to a wider value, the asm will get printed 1616ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // "wrong". 1617f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= InSize < OutSize; 1618ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 1619f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner if (isOperandMentioned(TiedTo, Pieces)) { 1620ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the output, and if the output is the larger 1621ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // value, then it's ok because we'll promote the input to the larger type. 1622f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= OutSize < InSize; 1623806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 16241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1625aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 1626aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // output was a register, just extend the shorter one to the size of the 1627aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // larger one. 1628aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (!SmallerValueMentioned && InputDomain != AD_Other && 1629aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 1630aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 1631f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner 1632935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // Either both of the operands were mentioned or the smaller one was 1633935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // mentioned. One more special case that we'll allow: if the tied input is 1634935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // integer, unmentioned, and is a constant, then we'll allow truncating it 1635935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // down to the size of the destination. 1636935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (InputDomain == AD_Int && OutputDomain == AD_Int && 1637935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner !isOperandMentioned(InputOpNo, Pieces) && 1638935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner InputExpr->isEvaluatable(Context)) { 1639429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley InputExpr = ImpCastExprToType(InputExpr, OutTy, CK_IntegralCast).take(); 1640935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Exprs[InputOpNo] = InputExpr; 1641935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner NS->setInputExpr(i, InputExpr); 1642935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner continue; 1643935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner } 1644935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner 1645c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 1646806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 16477adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 1648806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 1649806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 1650806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 16511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1652fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 1653fe795956194141c91ae555985c9b930595bff43fChris Lattner} 16543b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 165560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1656431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 1657d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall SourceLocation RParen, Decl *Parm, 16589ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *Body) { 1659d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall VarDecl *Var = cast_or_null<VarDecl>(Parm); 1660160b5630aa781ac348303e1ae088d27016637778Douglas Gregor if (Var && Var->isInvalidDecl()) 1661160b5630aa781ac348303e1ae088d27016637778Douglas Gregor return StmtError(); 1662dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 16639ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtCatchStmt(AtLoc, RParen, Var, Body)); 16643b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 16653b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 166660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 16679ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body) { 16689ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, Body)); 1669161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 1670bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 167160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1672dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 16739ae2f076ca5ab1feb3ba95629099ec2319833701John McCall MultiStmtArg CatchStmts, Stmt *Finally) { 1674da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson if (!getLangOptions().ObjCExceptions) 1675da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@try"; 1676da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 1677781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 16788f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor unsigned NumCatchStmts = CatchStmts.size(); 16799ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(ObjCAtTryStmt::Create(Context, AtLoc, Try, 16809ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CatchStmts.release(), 16818f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor NumCatchStmts, 16829ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Finally)); 1683bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 1684bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 168560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::BuildObjCAtThrowStmt(SourceLocation AtLoc, 16869ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Throw) { 1687d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (Throw) { 1688429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultLvalueConversion(Throw); 1689429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1690429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 16915e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 1692429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Throw = Result.take(); 1693d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor QualType ThrowType = Throw->getType(); 1694d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor // Make sure the expression type is an ObjC pointer or "void *". 1695d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!ThrowType->isDependentType() && 1696d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor !ThrowType->isObjCObjectPointerType()) { 1697d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor const PointerType *PT = ThrowType->getAs<PointerType>(); 1698d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!PT || !PT->getPointeeType()->isVoidType()) 1699d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 1700d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor << Throw->getType() << Throw->getSourceRange()); 1701d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 1702d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 1703dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17049ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtThrowStmt(AtLoc, Throw)); 1705d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor} 1706d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor 170760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1708dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1709d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor Scope *CurScope) { 1710da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson if (!getLangOptions().ObjCExceptions) 1711da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@throw"; 1712da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 17139ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Throw) { 1714e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 1715e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 1716e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 1717e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 1718e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 1719e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 17204ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 1721dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 1722dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17239ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return BuildObjCAtThrowStmt(AtLoc, Throw); 172439f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 1725bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 172660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 17279ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, Expr *SyncExpr, 17289ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SyncBody) { 1729781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 173046c3c4ba78766ac0f1c5ec631b424773e21f5271Chris Lattner 1731429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultLvalueConversion(SyncExpr); 1732429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1733429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 17345e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 1735429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley SyncExpr = Result.take(); 1736a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 17378fdc13a78a43f09ac396e682c35d57ca0b48216dDouglas Gregor if (!SyncExpr->getType()->isDependentType() && 17388fdc13a78a43f09ac396e682c35d57ca0b48216dDouglas Gregor !SyncExpr->getType()->isObjCObjectPointerType()) { 17396217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const PointerType *PT = SyncExpr->getType()->getAs<PointerType>(); 1740a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner if (!PT || !PT->getPointeeType()->isVoidType()) 1741a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner return StmtError(Diag(AtLoc, diag::error_objc_synchronized_expects_object) 1742a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner << SyncExpr->getType() << SyncExpr->getSourceRange()); 1743a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 17441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17459ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, SyncExpr, SyncBody)); 1746fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 17474b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 17484b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 17494b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 175060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1751d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, Decl *ExDecl, 17529ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *HandlerBlock) { 17534b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 17548189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 1755d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall cast_or_null<VarDecl>(ExDecl), 17569ae2f076ca5ab1feb3ba95629099ec2319833701John McCall HandlerBlock)); 17574b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 17588351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 17593c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 17603c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 1761c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlclass TypeWithHandler { 1762c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType t; 1763c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *stmt; 1764c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlpublic: 1765c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler(const QualType &type, CXXCatchStmt *statement) 1766c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl : t(type), stmt(statement) {} 1767c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 17680953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // An arbitrary order is fine as long as it places identical 17690953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // types next to each other. 1770c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator<(const TypeWithHandler &y) const { 17710953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() < y.t.getAsOpaquePtr()) 1772c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return true; 17730953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() > y.t.getAsOpaquePtr()) 1774c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return false; 1775c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl else 1776c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return getTypeSpecStartLoc() < y.getTypeSpecStartLoc(); 1777c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 17781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1779c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator==(const TypeWithHandler& other) const { 17800953e767ff7817f97b3ab20896b229891eeff45bJohn McCall return t == other.t; 1781c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 17821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1783c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *getCatchStmt() const { return stmt; } 1784c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl SourceLocation getTypeSpecStartLoc() const { 1785c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return stmt->getExceptionDecl()->getTypeSpecStartLoc(); 1786c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 1787c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl}; 1788c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 17893c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 17903c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 17918351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 17928351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 179360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 17949ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 17958351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 1796729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson // Don't report an error if 'try' is used in system headers. 179715348aeb81285c75b2e92b5bf8d2db3445d147c2Anders Carlsson if (!getLangOptions().CXXExceptions && 1798729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson !getSourceManager().isInSystemHeader(TryLoc)) 1799729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson Diag(TryLoc, diag::err_exceptions_disabled) << "try"; 18007f11d9cf5df1f8ce82af46eabc4ec5cec7d580b0Anders Carlsson 18018351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 18028351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 18038351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 18049ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt **Handlers = RawHandlers.get(); 18058351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 1806c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::SmallVector<TypeWithHandler, 8> TypesWithHandlers; 18071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (unsigned i = 0; i < NumHandlers; ++i) { 18098351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl CXXCatchStmt *Handler = llvm::cast<CXXCatchStmt>(Handlers[i]); 1810c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (!Handler->getExceptionDecl()) { 1811c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (i < NumHandlers - 1) 1812c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return StmtError(Diag(Handler->getLocStart(), 1813c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::err_early_catch_all)); 18141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1815c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl continue; 1816c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 18171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1818c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CaughtType = Handler->getCaughtType(); 1819c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CanonicalCaughtType = Context.getCanonicalType(CaughtType); 1820c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypesWithHandlers.push_back(TypeWithHandler(CanonicalCaughtType, Handler)); 1821c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 1822c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 1823c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl // Detect handlers for the same type as an earlier one. 1824c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (NumHandlers > 1) { 1825c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::array_pod_sort(TypesWithHandlers.begin(), TypesWithHandlers.end()); 18261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1827c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler prev = TypesWithHandlers[0]; 1828c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl for (unsigned i = 1; i < TypesWithHandlers.size(); ++i) { 1829c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler curr = TypesWithHandlers[i]; 18301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1831c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (curr == prev) { 1832c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(curr.getTypeSpecStartLoc(), 1833c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::warn_exception_caught_by_earlier_handler) 1834c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << curr.getCatchStmt()->getCaughtType().getAsString(); 1835c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(prev.getTypeSpecStartLoc(), 1836c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::note_previous_exception_handler) 1837c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << prev.getCatchStmt()->getCaughtType().getAsString(); 1838c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 18391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1840c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl prev = curr; 1841c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 18428351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 18431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1844781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 1845b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 18468351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 18478351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 18488351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 18498351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 18508351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 18518351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 18529ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(CXXTryStmt::Create(Context, TryLoc, TryBlock, 1853a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig Handlers, NumHandlers)); 18548351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 1855