SemaStmt.cpp revision 575a1c9dc8dc5b4977194993e289f9eda7295c39
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- SemaStmt.cpp - Semantic Analysis for Statements ------------------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements semantic analysis for statements. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 142d88708cbe4e4ec5e04e4acb6bd7f5be68557379John McCall#include "clang/Sema/SemaInternal.h" 155f1e0942a32657b625702aa52f82430d0120f424John McCall#include "clang/Sema/Scope.h" 16781472fe99a120098c631b0cbe33c89f8cef5e70John McCall#include "clang/Sema/ScopeInfo.h" 17e737f5041a36d0befb39ffeed8d50ba15916d3daDouglas Gregor#include "clang/Sema/Initialization.h" 18ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith#include "clang/Sema/Lookup.h" 1951fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson#include "clang/AST/APValue.h" 20f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner#include "clang/AST/ASTContext.h" 21c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2284fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor#include "clang/AST/ExprCXX.h" 23419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner#include "clang/AST/ExprObjC.h" 2416f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtObjC.h" 2516f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtCXX.h" 26209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall#include "clang/AST/TypeLoc.h" 2784fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor#include "clang/Lex/Preprocessor.h" 286fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson#include "clang/Basic/TargetInfo.h" 29ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner#include "llvm/ADT/ArrayRef.h" 30c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/STLExtras.h" 31c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/SmallVector.h" 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 33781472fe99a120098c631b0cbe33c89f8cef5e70John McCallusing namespace sema; 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::ActOnExprStmt(FullExprArg expr) { 369ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E = expr.get(); 37bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor if (!E) // FIXME: FullExprArg has no error state? 38bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor return StmtError(); 39bebbe0d9b7568ce43a464286bee49429489ef483Douglas Gregor 40834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // C99 6.8.3p2: The expression in an expression statement is evaluated as a 41834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // void expression for its side effects. Conversion to void allows any 42834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // operand, even incomplete types. 43a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 44834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // Same thing in for stmt first clause (when expr) and third clause. 45a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(static_cast<Stmt*>(E)); 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 49b7d98d35ea723624345f06e5895ddce2e0388ef0Argyrios KyrtzidisStmtResult Sema::ActOnNullStmt(SourceLocation SemiLoc, 50b7d98d35ea723624345f06e5895ddce2e0388ef0Argyrios Kyrtzidis SourceLocation LeadingEmptyMacroLoc) { 51b7d98d35ea723624345f06e5895ddce2e0388ef0Argyrios Kyrtzidis return Owned(new (Context) NullStmt(SemiLoc, LeadingEmptyMacroLoc)); 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 54337e550218128e7d922c09bb354fbc71de90c568Chris LattnerStmtResult Sema::ActOnDeclStmt(DeclGroupPtrTy dg, SourceLocation StartLoc, 55337e550218128e7d922c09bb354fbc71de90c568Chris Lattner SourceLocation EndLoc) { 5620401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 58682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // If we have an invalid decl, just return an error. 5920401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner if (DG.isNull()) return StmtError(); 601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6124e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return Owned(new (Context) DeclStmt(DG, StartLoc, EndLoc)); 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 64a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanianvoid Sema::ActOnForEachDeclStmt(DeclGroupPtrTy dg) { 65a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 66dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 67a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian // If we have an invalid decl, just return. 68a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian if (DG.isNull() || !DG.isSingleDecl()) return; 69a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian // suppress any potential 'unused variable' warning. 70a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian DG.getSingleDecl()->setUsed(); 71a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian} 72a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian 73636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlssonvoid Sema::DiagnoseUnusedExprResult(const Stmt *S) { 74d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis if (const LabelStmt *Label = dyn_cast_or_null<LabelStmt>(S)) 75d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis return DiagnoseUnusedExprResult(Label->getSubStmt()); 76d2827af6f96d441d72315dbe6d8505c3be0f2aa6Argyrios Kyrtzidis 77754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson const Expr *E = dyn_cast_or_null<Expr>(S); 78636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (!E) 79636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 80636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 81636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceLocation Loc; 82636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceRange R1, R2; 83df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (!E->isUnusedResultAWarning(Loc, R1, R2, Context)) 84636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // Okay, we have an unused result. Depending on what the base expression is, 87419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // we might want to make a more specific diagnostic. Check for one of these 88419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // cases now. 89419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner unsigned DiagID = diag::warn_unused_expr; 904765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall if (const ExprWithCleanups *Temps = dyn_cast<ExprWithCleanups>(E)) 914dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor E = Temps->getSubExpr(); 9234d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth if (const CXXBindTemporaryExpr *TempExpr = dyn_cast<CXXBindTemporaryExpr>(E)) 9334d49471e0b6386aefdc0f6bd15e4a4876ce5db1Chandler Carruth E = TempExpr->getSubExpr(); 9412f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall 95f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall E = E->IgnoreParenImpCasts(); 96bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { 970faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall if (E->getType()->isVoidType()) 980faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall return; 990faede6f31b07bcec7b776f2b420c3ea9bb3e58cJohn McCall 100bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // If the callee has attribute pure, const, or warn_unused_result, warn with 101bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // a more specific message to make it clear what is happening. 102d20254f2875d0004c57ee766f258dbcee29f4841Nuno Lopes if (const Decl *FD = CE->getCalleeDecl()) { 103bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<WarnUnusedResultAttr>()) { 104bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "warn_unused_result"; 105bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 106bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 107bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<PureAttr>()) { 108bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "pure"; 109bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 110bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 111bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<ConstAttr>()) { 112bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "const"; 113bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 114bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 115dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 11612f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (const ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(E)) { 117f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian const ObjCMethodDecl *MD = ME->getMethodDecl(); 118f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian if (MD && MD->getAttr<WarnUnusedResultAttr>()) { 119f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian Diag(Loc, diag::warn_unused_call) << R1 << R2 << "warn_unused_result"; 120f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian return; 121f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 12212f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } else if (isa<ObjCPropertyRefExpr>(E)) { 12312f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall DiagID = diag::warn_unused_property_expr; 124d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor } else if (const CXXFunctionalCastExpr *FC 125d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor = dyn_cast<CXXFunctionalCastExpr>(E)) { 126d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor if (isa<CXXConstructExpr>(FC->getSubExpr()) || 127d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor isa<CXXTemporaryObjectExpr>(FC->getSubExpr())) 128d6e44a3c4193bd422bfa78c8086fb16bb2168e34Douglas Gregor return; 129f031774aa2638b4d3f487e7e44180c1f89b867efFariborz Jahanian } 130209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // Diagnose "(void*) blah" as a typo for "(void) blah". 131209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall else if (const CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(E)) { 132209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall TypeSourceInfo *TI = CE->getTypeInfoAsWritten(); 133209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall QualType T = TI->getType(); 134209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 135209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall // We really do want to use the non-canonical type here. 136209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall if (T == Context.VoidPtrTy) { 137209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall PointerTypeLoc TL = cast<PointerTypeLoc>(TI->getTypeLoc()); 138209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 139209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall Diag(Loc, diag::warn_unused_voidptr) 140209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall << FixItHint::CreateRemoval(TL.getStarLoc()); 141209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall return; 142209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 143209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall } 144209acbd6d0c1b4444eb8c1682717753e1cbe38deJohn McCall 145351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek DiagRuntimeBehavior(Loc, 0, PDiag(DiagID) << R1 << R2); 146636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson} 147636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 14860d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1491b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 150a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 151a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 152a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 153c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 154c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 155c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus) { 156c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 157c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 158c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 159c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 160c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 161c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 162c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 163c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 164c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 1651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 166c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 1674afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 168c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 169c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 170c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 17198414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 17298414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 173636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson // Ignore statements that are last in a statement expression. 174636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (isStmtExpr && i == NumElts - 1) 17598414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 1761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 177636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson DiagnoseUnusedExprResult(Elts[i]); 17898414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 179a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 1808189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 18360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1849ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1859ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation DotDotDotLoc, Expr *RHSVal, 18624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 1879ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert((LHSVal != 0) && "missing expression in case statement"); 188117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.4.2p3: The expression shall be an integer constant. 1901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // However, GCC allows any evaluatable integer expression. 1911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!LHSVal->isTypeDependent() && !LHSVal->isValueDependent() && 192dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(LHSVal)) 19324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1956c36be5b383875b490684bcf439d6d427298c1afChris Lattner // GCC extension: The expression shall be an integer constant. 196117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 197dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (RHSVal && !RHSVal->isTypeDependent() && !RHSVal->isValueDependent() && 198dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(RHSVal)) { 199f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner RHSVal = 0; // Recover by just forgetting about it. 200117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl } 201117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 202781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 2038a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner Diag(CaseLoc, diag::err_case_not_in_switch); 20424e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 2058a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 207dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc, DotDotDotLoc, 208dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ColonLoc); 209781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(CS); 210117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 21324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 2149ae2f076ca5ab1feb3ba95629099ec2319833701John McCallvoid Sema::ActOnCaseStmtBody(Stmt *caseStmt, Stmt *SubStmt) { 21524e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 21624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 21724e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 21824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 21960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2201eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 2219ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SubStmt, Scope *CurScope) { 222781472fe99a120098c631b0cbe33c89f8cef5e70John McCall if (getCurFunction()->SwitchStack.empty()) { 2230fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 224117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 2250fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 226117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 227dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, ColonLoc, SubStmt); 228781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.back()->addSwitchCase(DS); 229117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 23260d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 23357ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerSema::ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 23457ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation ColonLoc, Stmt *SubStmt) { 23557ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner 236ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // If the label was multiply defined, reject it now. 237ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner if (TheDecl->getStmt()) { 238ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << TheDecl->getDeclName(); 239ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner Diag(TheDecl->getLocation(), diag::note_previous_definition); 240de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 242de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 243ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner // Otherwise, things are good. Fill in the declaration and return it. 244ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner LabelStmt *LS = new (Context) LabelStmt(IdentLoc, TheDecl, SubStmt); 245ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setStmt(LS); 246203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara if (!TheDecl->isGnuLocal()) 247203548ba4b72e7e59320d352afc1eb0b5ab131deAbramo Bagnara TheDecl->setLocation(IdentLoc); 248ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(LS); 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 25160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 252d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, Decl *CondVar, 25344aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *thenStmt, SourceLocation ElseLoc, 25444aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis Stmt *elseStmt) { 25560d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(CondVal.release()); 2561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2578cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor VarDecl *ConditionVar = 0; 258d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 259d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 260586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, IfLoc, true); 26199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 26299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 2638cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor } 26499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 26599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 26699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 267dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 268754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(thenStmt); 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2702d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 2712d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 2722d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 2732d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 274b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek // 2759ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!elseStmt) { 2762d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 277a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // But do not warn if the body is a macro that expands to nothing, e.g: 278a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 279a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // #define CALL(x) 280a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // if (condition) 281a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // CALL(0); 282a25b6a4b43e8b9611f7506e5fe1b448833b10a46Argyrios Kyrtzidis // 28344aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis if (!stmt->hasLeadingEmptyMacro()) 284b3198178daf9d33466fc18e009e2c6692fdf29c0Ted Kremenek Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 2852d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 2862d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 287754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(elseStmt); 2881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 289dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) IfStmt(Context, IfLoc, ConditionVar, ConditionExpr, 29044aa1f397855f130e88e62ffc1029f7f83bb5d2eArgyrios Kyrtzidis thenStmt, ElseLoc, elseStmt)); 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 293f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 294f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 295f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 296f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 297f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 2981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, 299f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 300f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 301f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 302f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 3039f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(NewWidth); 304f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 305f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor 306f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // If the input was signed and negative and the output is 307f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // unsigned, don't bother to warn: this is implementation-defined 308f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // behavior. 309f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 310f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 311f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 312f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 3139f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.trunc(NewWidth); 314b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 3159f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad ConvVal = ConvVal.extend(Val.getBitWidth()); 316b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 317f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 318d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 3191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 320f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 321f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 3229f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(NewWidth); 323b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 324f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 325f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 326f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 327dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // We don't diagnose this overflow, because it is implementation-defined 3282853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // behavior. 3292853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 330f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 331f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 332f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 333f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 334f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3350471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3360471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3370471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3380471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3390471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3400471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3410e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3420e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3430e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3440e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3450471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3460471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3470471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3480471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3490471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3500471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3510471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 352764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 353764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 354764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 355764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 356764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 357764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 358764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 359764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 360764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 361764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 362764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 363764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 364764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 365764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 366ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// CmpEnumVals - Comparison predicate for sorting enumeration values. 367ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 368ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool CmpEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 369ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 370ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 371ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first < rhs.first; 372ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 373ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 374ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// EqEnumVals - Comparison preficate for uniqing enumeration values. 375ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 376ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool EqEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 377ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 378ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 379ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first == rhs.first; 380ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 381ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 3825f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// GetTypeBeforeIntegralPromotion - Returns the pre-promotion type of 3835f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// potentially integral-promoted expression @p expr. 3845f04881eb025f61396d0555d8173730fe2759e0aChris Lattnerstatic QualType GetTypeBeforeIntegralPromotion(const Expr* expr) { 3856907fbe758d23e1aec4c0a67e7b633d1d855feb4John McCall if (const CastExpr *ImplicitCast = dyn_cast<ImplicitCastExpr>(expr)) { 3865f04881eb025f61396d0555d8173730fe2759e0aChris Lattner const Expr *ExprBeforePromotion = ImplicitCast->getSubExpr(); 3875f04881eb025f61396d0555d8173730fe2759e0aChris Lattner QualType TypeBeforePromotion = ExprBeforePromotion->getType(); 3882ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (TypeBeforePromotion->isIntegralOrEnumerationType()) { 3895f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return TypeBeforePromotion; 3905f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 3915f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 3925f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return expr->getType(); 3935f04881eb025f61396d0555d8173730fe2759e0aChris Lattner} 3945f04881eb025f61396d0555d8173730fe2759e0aChris Lattner 39560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 396dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, Expr *Cond, 397d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall Decl *CondVar) { 39860d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult; 3999ae2f076ca5ab1feb3ba95629099ec2319833701John McCall 400586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor VarDecl *ConditionVar = 0; 401d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 402d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 4039ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult = CheckConditionVariable(ConditionVar, SourceLocation(), false); 4049ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 405586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 406dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4079ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.release(); 408586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 409dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4109ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Cond) 411586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 412dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4139ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CondResult 414dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = ConvertToIntegralOrEnumerationType(SwitchLoc, Cond, 415c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_typecheck_statement_requires_integer), 416c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_incomplete_class_type) 4179ae2f076ca5ab1feb3ba95629099ec2319833701John McCall << Cond->getSourceRange(), 418c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_explicit_conversion), 419c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::note_switch_conversion), 420c30614b7e2bad089f2509499379de509f33162d6Douglas Gregor PDiag(diag::err_switch_multiple_conversions), 4216bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(diag::note_switch_conversion), 4226bc574daab3d3571d888cc4a21df67f2e2a14792Douglas Gregor PDiag(0)); 4239ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) return StmtError(); 4249ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 425dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 426d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (!CondVar) { 427b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, SwitchLoc); 4284765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall CondResult = MaybeCreateExprWithCleanups(Cond); 4299ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 430586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 4319ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 432586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor } 433b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 434781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchIntoScope(); 435dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4369ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = new (Context) SwitchStmt(Context, ConditionVar, Cond); 437781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.push_back(SS); 438586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return Owned(SS); 4397e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner} 4407e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner 44128164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greifstatic void AdjustAPSInt(llvm::APSInt &Val, unsigned BitWidth, bool IsSigned) { 44228164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif if (Val.getBitWidth() < BitWidth) 4439f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.extend(BitWidth); 44428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif else if (Val.getBitWidth() > BitWidth) 4459f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Val = Val.trunc(BitWidth); 44628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Val.setIsSigned(IsSigned); 44728164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif} 44828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif 44960d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 4509ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, Stmt *Switch, 4519ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *BodyStmt) { 4529ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SwitchStmt *SS = cast<SwitchStmt>(Switch); 453781472fe99a120098c631b0cbe33c89f8cef5e70John McCall assert(SS == getCurFunction()->SwitchStack.back() && 454781472fe99a120098c631b0cbe33c89f8cef5e70John McCall "switch stack missing push/pop!"); 455de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 4569dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 457781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->SwitchStack.pop_back(); 458c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 459ff331c15729f7d4439d253c97f4d60f2a7ffd0c6Douglas Gregor if (SS->getCond() == 0) 460be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor return StmtError(); 461dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 462f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 4630fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr *CondExprBeforePromotion = CondExpr; 46484fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor QualType CondTypeBeforePromotion = 46584fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor GetTypeBeforeIntegralPromotion(CondExpr); 466de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 4670de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 468429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult CondResult = UsualUnaryConversions(CondExpr); 469429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (CondResult.isInvalid()) 470429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 471429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CondExpr = CondResult.take(); 472a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor QualType CondType = CondExpr->getType(); 47384fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor SS->setCond(CondExpr); 47484fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor 4755f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // C++ 6.4.2.p2: 4765f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // Integral promotions are performed (on the switch condition). 4775f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // 4785f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // A case value unrepresentable by the original switch condition 4795f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // type (before the promotion) doesn't make sense, even when it can 4805f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // be represented by the promoted type. Therefore we need to find 4815f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // the pre-promotion type of the switch condition. 48212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondExpr->isTypeDependent()) { 483acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // We have already converted the expression to an integral or enumeration 484dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // type, when we started the switch statement. If we don't have an 485acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor // appropriate type now, just return an error. 486acb0bd85d30ecacbe872ca9d9cfac5d7b6038a43Douglas Gregor if (!CondType->isIntegralOrEnumerationType()) 48712356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan return StmtError(); 48812356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan 4892b334bb3126a67895813e49e6228dad4aec0b4d6Chris Lattner if (CondExpr->isKnownToHaveBooleanValue()) { 49012356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(bool_expr) {...} is often a programmer error, e.g. 49112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(n && mask) { ... } // Doh - should be "n & mask". 49212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // One can always use an if statement instead of switch(bool_expr). 49312356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::warn_bool_switch_condition) 49412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondExpr->getSourceRange(); 49512356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 496c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 497de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 498f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 499f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 5001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HasDependentValue 501dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 5021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned CondWidth 5031d6ab7af99a1fc059a6aa5da083640c1d94b07f7Chris Lattner = HasDependentValue ? 0 : Context.getIntWidth(CondTypeBeforePromotion); 504575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool CondIsSigned 505575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor = CondTypeBeforePromotion->isSignedIntegerOrEnumerationType(); 5061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 507f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 508f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 509f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 5100471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner typedef llvm::SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 5110471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 5121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 513f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 514ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRangesTy; 515ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy CaseRanges; 5161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 517f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 5181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 519b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 5201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 521dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 522c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 5231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 524c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 525f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 526f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 5275f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 528de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 529f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 530390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 531390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 532390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 533b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 534c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 535f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 5361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 537f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 538f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 5391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 540f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 541f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 5421e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 543dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 544dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 545dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 546dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 547dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 5481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 54951fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 5501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 551f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 552f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 55328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Lo->getLocStart(), 554f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 5556c36be5b383875b490684bcf439d6d427298c1afChris Lattner 5561e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 5571e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 558429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Lo = ImpCastExprToType(Lo, CondType, CK_IntegralCast).take(); 5591e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 5601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 561b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 562dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 5631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CS->getRHS()->isTypeDependent() || 564dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 565dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 566dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 567dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 568f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 5691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 570b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 571f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 572f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 573b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 574dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 5750fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // If we don't have a default statement, check whether the 5760fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // condition is constant. 5770fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt ConstantCondValue; 5780fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool HasConstantCond = false; 5790fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall bool ShouldCheckConstantCond = false; 5800fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!HasDependentValue && !TheDefaultStmt) { 5810fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Expr::EvalResult Result; 5820fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall HasConstantCond = CondExprBeforePromotion->Evaluate(Result, Context); 5830fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (HasConstantCond) { 5840fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(Result.Val.isInt() && "switch condition evaluated to non-int"); 5850fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue = Result.Val.getInt(); 5860fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = true; 5870fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 5880fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall assert(ConstantCondValue.getBitWidth() == CondWidth && 5890fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue.isSigned() == CondIsSigned); 5900fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 5910fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 5920fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 593dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 594dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 595dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 596dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 5970fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (unsigned i = 0, e = CaseVals.size(); i != e; ++i) { 5980fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 5990fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CaseVals[i].first == ConstantCondValue) 6000fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6010fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6020fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (i != 0 && CaseVals[i].first == CaseVals[i-1].first) { 603dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 6041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(CaseVals[i].second->getLHS()->getLocStart(), 6050fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall diag::err_duplicate_case) << CaseVals[i].first.toString(10); 6060fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CaseVals[i-1].second->getLHS()->getLocStart(), 607dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 608390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 609390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 610dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 611dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6126efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 613b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 6141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 615dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 616dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 617dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 618dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 619dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 620dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 6211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 622dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 623dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 624dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 6250fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall llvm::APSInt &LoVal = CaseRanges[i].first; 626dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 627dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 628dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 6291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 630dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 631dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 63228164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocStart(), 633dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 6341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 635dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the LHS is not the same type as the condition, insert an implicit 636dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // cast. 637429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Hi = ImpCastExprToType(Hi, CondType, CK_IntegralCast).take(); 638dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 6391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 640dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 6410fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (LoVal > HiVal) { 642dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 643dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 64428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif Hi->getLocEnd()); 645dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 646dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 647dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 648dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6490fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 6500fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (ShouldCheckConstantCond && 6510fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall LoVal <= ConstantCondValue && 6520fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ConstantCondValue <= HiVal) 6530fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall ShouldCheckConstantCond = false; 6540fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 655dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 6560471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 6571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 658dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 659dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 660dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 661dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 662dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 663dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 664dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 6651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 666dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 667dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 668dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 669dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 6701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 671dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 672dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 673dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 674dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 675dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 676dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 677dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 678dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 679dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 681dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 682dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 683dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 684dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 685dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 686dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 688dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 689dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 690dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 691dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 692dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 693dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 695dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 696dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 697dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 698dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 6991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(OverlapStmt->getLHS()->getLocStart(), 700dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 701390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 702390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 703dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 704dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7050471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 706b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 707ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7080fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Complain if we have a constant condition and we didn't find a match. 7090fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall if (!CaseListIsErroneous && ShouldCheckConstantCond) { 7100fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // TODO: it would be nice if we printed enums as enums, chars as 7110fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // chars, etc. 7120fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CondExpr->getExprLoc(), diag::warn_missing_case_for_condition) 7130fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ConstantCondValue.toString(10) 7140fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << CondExpr->getSourceRange(); 7150fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall } 7160fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall 7170fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Check to see if switch is over an Enum and handles all of its 718559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // values. We only issue a warning if there is not 'default:', but 719559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // we still do the analysis to preserve this information in the AST 720559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // (which can be used by flow-based analyes). 7210fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // 722ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner const EnumType *ET = CondTypeBeforePromotion->getAs<EnumType>(); 723559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 724ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // If switch has default case, then ignore it. 725559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!CaseListIsErroneous && !HasConstantCond && ET) { 726ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const EnumDecl *ED = ET->getDecl(); 727ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef llvm::SmallVector<std::pair<llvm::APSInt, EnumConstantDecl*>, 64> EnumValsTy; 728ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy EnumVals; 729ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 7300fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // Gather all enum values, set their type and sort them, 7310fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall // allowing easier comparison with CaseVals. 7320fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall for (EnumDecl::enumerator_iterator EDI = ED->enumerator_begin(); 73328164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EDI != ED->enumerator_end(); ++EDI) { 73428164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif llvm::APSInt Val = EDI->getInitVal(); 73528164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Val, CondWidth, CondIsSigned); 73628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif EnumVals.push_back(std::make_pair(Val, *EDI)); 737ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 738ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor std::stable_sort(EnumVals.begin(), EnumVals.end(), CmpEnumVals); 7390fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall EnumValsTy::iterator EIend = 7400fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall std::unique(EnumVals.begin(), EnumVals.end(), EqEnumVals); 741559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 742559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // See which case values aren't in enum. 743559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // TODO: we might want to check whether case values are out of the 744559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // enum even if we don't want to check whether all cases are handled. 745559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!TheDefaultStmt) { 74647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EnumValsTy::const_iterator EI = EnumVals.begin(); 74747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseValsTy::const_iterator CI = CaseVals.begin(); 7480fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall CI != CaseVals.end(); CI++) { 74947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < CI->first) 75047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 75147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first > CI->first) 7520fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall Diag(CI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 7530fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall << ED->getDeclName(); 75447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 75547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek // See which of case ranges aren't in enum 75647bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI = EnumVals.begin(); 75747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek for (CaseRangesTy::const_iterator RI = CaseRanges.begin(); 7580fb97083cc0f8a82e404e22991ae80d2216e71d5John McCall RI != CaseRanges.end() && EI != EIend; RI++) { 75947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < RI->first) 76047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 761dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 76247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != RI->first) { 76347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getLHS()->getExprLoc(), diag::warn_not_in_enum) 76447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 76547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 766e0ba9d1beeba01a96808c2fc61f9ca89acec313bTed Kremenek 76747bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 76828164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 76947bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek while (EI != EIend && EI->first < Hi) 77047bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek EI++; 77147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (EI == EIend || EI->first != Hi) 77247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek Diag(RI->second->getRHS()->getExprLoc(), diag::warn_not_in_enum) 77347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek << ED->getDeclName(); 77447bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 775ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 776dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 777559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Check which enum vals aren't in switch 778ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseValsTy::const_iterator CI = CaseVals.begin(); 779ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy::const_iterator RI = CaseRanges.begin(); 780559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek bool hasCasesNotInSwitch = false; 781559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 782ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner llvm::SmallVector<DeclarationName,8> UnhandledNames; 783dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 784559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek for (EnumValsTy::const_iterator EI = EnumVals.begin(); EI != EIend; EI++){ 785ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Drop unneeded case values 786ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt CIVal; 787ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (CI != CaseVals.end() && CI->first < EI->first) 788ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CI++; 789dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 790ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (CI != CaseVals.end() && CI->first == EI->first) 791ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor continue; 792ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 793559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek // Drop unneeded case ranges 794ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (; RI != CaseRanges.end(); RI++) { 795ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 79628164ab2ac1deea68cdb989f941728bf1860ce41Gabor Greif AdjustAPSInt(Hi, CondWidth, CondIsSigned); 797ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI->first <= Hi) 798ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor break; 799ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 800ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 801559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (RI == CaseRanges.end() || EI->first < RI->first) { 80247bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek hasCasesNotInSwitch = true; 80347bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek if (!TheDefaultStmt) 804ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner UnhandledNames.push_back(EI->second->getDeclName()); 80547bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek } 806ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 807dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 808ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner // Produce a nice diagnostic if multiple values aren't handled. 809ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner switch (UnhandledNames.size()) { 810ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 0: break; 811ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 1: 812ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case1) 813ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0]; 814ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 815ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 2: 816ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case2) 817ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1]; 818ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 819ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner case 3: 820ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_case3) 821ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 822ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 823ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner default: 824ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner Diag(CondExpr->getExprLoc(), diag::warn_missing_cases) 825ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << (unsigned)UnhandledNames.size() 826ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner << UnhandledNames[0] << UnhandledNames[1] << UnhandledNames[2]; 827ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner break; 828ce78461303f45fecb3460d1c49c9b71f27ad19c3Chris Lattner } 829559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek 830559fb554602bedb57dbbf3cc14ac8a38264b4547Ted Kremenek if (!hasCasesNotInSwitch) 83147bb27f16882e4f5ababdd0cf6642bb904a9aaf8Ted Kremenek SS->setAllEnumCasesCovered(); 832ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 833b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 834dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 835390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 836390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 837b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 838de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 839de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 840de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 8415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 84360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 844dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, 8459ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Decl *CondVar, Stmt *Body) { 84660d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult CondResult(Cond.release()); 847dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8485656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor VarDecl *ConditionVar = 0; 849d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (CondVar) { 850d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(CondVar); 851586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor CondResult = CheckConditionVariable(ConditionVar, WhileLoc, true); 85299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 85399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 8545656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor } 8559ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *ConditionExpr = CondResult.take(); 85699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 85799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 858dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8599ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 8601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 86143dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor return Owned(new (Context) WhileStmt(Context, ConditionVar, ConditionExpr, 8629ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Body, WhileLoc)); 8635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 86560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 8669ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 867989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 8689ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Cond, SourceLocation CondRParen) { 8699ae2f076ca5ab1feb3ba95629099ec2319833701John McCall assert(Cond && "ActOnDoStmt(): missing expression"); 870f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 871429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult CondResult = CheckBooleanCondition(Cond, DoLoc); 872429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (CondResult.isInvalid() || CondResult.isInvalid()) 8735a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 874429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Cond = CondResult.take(); 8755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 876b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(Cond, DoLoc); 877429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CondResult = MaybeCreateExprWithCleanups(Cond); 8789ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (CondResult.isInvalid()) 879586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor return StmtError(); 8809ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Cond = CondResult.take(); 881dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 8829ae2f076ca5ab1feb3ba95629099ec2319833701John McCall DiagnoseUnusedExprResult(Body); 883754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 8849ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) DoStmt(Body, Cond, DoLoc, WhileLoc, CondRParen)); 8855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 88760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 888f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 8899ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, FullExprArg second, Decl *secondVar, 89099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor FullExprArg third, 8919ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 8925921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 8935921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 894f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 895f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 896f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 8975921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 8985921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 8995921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 900b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD && VD->isLocalVarDecl() && !VD->hasLocalStorage()) 9015921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 9025921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 9035921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 9045921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 9055921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 906ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 9075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 90899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 90960d7b3a319d84d688752be3870615ac0f111fb16John McCall ExprResult SecondResult(second.release()); 91099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor VarDecl *ConditionVar = 0; 911d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall if (secondVar) { 912d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall ConditionVar = cast<VarDecl>(secondVar); 913586596fd7f7a336a2847b300c80614dcf39ab6d5Douglas Gregor SecondResult = CheckConditionVariable(ConditionVar, ForLoc, true); 91499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (SecondResult.isInvalid()) 91599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 91699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor } 917dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 91899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Third = third.release().takeAs<Expr>(); 919dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9203af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(First); 9213af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(Third); 922754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(Body); 923754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 924dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Owned(new (Context) ForStmt(Context, First, 925dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi SecondResult.take(), ConditionVar, 926dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Third, Body, ForLoc, LParenLoc, 92743dec6bbde2d0a16c35978983761c8b7030c8e18Douglas Gregor RParenLoc)); 9285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 930f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// In an Objective C collection iteration statement: 931f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// for (x in y) 932f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// x can be an arbitrary l-value expression. Bind it up as a 933f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall/// full-expression. 934f6a1648197562e0b133440d612d9af297d0a86ccJohn McCallStmtResult Sema::ActOnForEachLValueExpr(Expr *E) { 935f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall CheckImplicitConversions(E); 9364765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall ExprResult Result = MaybeCreateExprWithCleanups(E); 937f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall if (Result.isInvalid()) return StmtError(); 938f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall return Owned(static_cast<Stmt*>(Result.get())); 939f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall} 940f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall 94160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 942f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 943f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 9449ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *First, Expr *Second, 9459ae2f076ca5ab1feb3ba95629099ec2319833701John McCall SourceLocation RParenLoc, Stmt *Body) { 94620552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 94720552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 94820552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 9497e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 950f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 951f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 952f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 9537e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner Decl *D = DS->getSingleDecl(); 954f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek FirstType = cast<ValueDecl>(D)->getType(); 955f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 956f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 957f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 958248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff VarDecl *VD = cast<VarDecl>(D); 959b6bbcc9995186799a60ce17d0c1acff31601653aJohn McCall if (VD->isLocalVarDecl() && !VD->hasLocalStorage()) 960f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(VD->getLocation(), 961f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 9621fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 963c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor Expr *FirstE = cast<Expr>(First); 9647eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (!FirstE->isTypeDependent() && !FirstE->isLValue()) 965f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 966f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 967f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 9681fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 9691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FirstType = static_cast<Expr*>(First)->getType(); 9701fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 971c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (!FirstType->isDependentType() && 972c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor !FirstType->isObjCObjectPointerType() && 973a5e42a82ce055f29f3733f3a1f10da6cb9877deeFariborz Jahanian !FirstType->isBlockPointerType()) 974dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 975d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 9763ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 977c3203e7ee1464a096f341c2e2a83a10be2da000aDouglas Gregor if (Second && !Second->isTypeDependent()) { 978429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(Second); 979429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 980429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 981429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Second = Result.take(); 9823ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian QualType SecondType = Second->getType(); 983f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!SecondType->isObjCObjectPointerType()) 984dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_collection_expr_type) 985d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 986ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian else if (const ObjCObjectPointerType *OPT = 987ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian SecondType->getAsObjCInterfacePointerType()) { 988ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian llvm::SmallVector<IdentifierInfo *, 4> KeyIdents; 989dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi IdentifierInfo* selIdent = 990ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian &Context.Idents.get("countByEnumeratingWithState"); 991ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 992ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian selIdent = &Context.Idents.get("objects"); 993ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 994ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian selIdent = &Context.Idents.get("count"); 995ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian KeyIdents.push_back(selIdent); 996ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian Selector CSelector = Context.Selectors.getSelector(3, &KeyIdents[0]); 997ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian if (ObjCInterfaceDecl *IDecl = OPT->getInterfaceDecl()) { 998dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!IDecl->isForwardDecl() && 99961478065fbcafcf5295bb0fb796c9a92f2d861e0Fariborz Jahanian !IDecl->lookupInstanceMethod(CSelector) && 100061478065fbcafcf5295bb0fb796c9a92f2d861e0Fariborz Jahanian !LookupMethodInQualifiedType(CSelector, OPT, true)) { 100180a785c2452c73b7c41d4a867edcf5a090c78c46Fariborz Jahanian // Must further look into private implementation methods. 1002ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian if (!LookupPrivateInstanceMethod(CSelector, IDecl)) 1003ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian Diag(ForLoc, diag::warn_collection_expr_type) 1004ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian << SecondType << CSelector << Second->getSourceRange(); 1005ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 1006ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 1007ea16110ce3a4fbb205735f0a55050bc11292e82cFariborz Jahanian } 10083ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 10098189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 10108189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 10113ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 10125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1013ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithnamespace { 1014ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1015ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithenum BeginEndFunction { 1016ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_begin, 1017ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_end 1018ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith}; 1019ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1020ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Build a variable declaration for a for-range statement. 1021ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic VarDecl *BuildForRangeVarDecl(Sema &SemaRef, SourceLocation Loc, 1022ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType Type, const char *Name) { 1023ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclContext *DC = SemaRef.CurContext; 1024ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IdentifierInfo *II = &SemaRef.PP.getIdentifierTable().get(Name); 1025ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TypeSourceInfo *TInfo = SemaRef.Context.getTrivialTypeSourceInfo(Type, Loc); 1026ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *Decl = VarDecl::Create(SemaRef.Context, DC, Loc, Loc, II, Type, 1027ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TInfo, SC_Auto, SC_None); 1028b403d6d746239095a2c7bac958c924d92434e2b4Richard Smith Decl->setImplicit(); 1029ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return Decl; 1030ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1031ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1032ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Finish building a variable declaration for a for-range statement. 1033ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// \return true if an error occurs. 1034ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic bool FinishForRangeVarDecl(Sema &SemaRef, VarDecl *Decl, Expr *Init, 1035ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc, int diag) { 1036ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Deduce the type for the iterator variable now rather than leaving it to 1037ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // AddInitializerToDecl, so we can produce a more suitable diagnostic. 1038ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith TypeSourceInfo *InitTSI = 0; 1039ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (Init->getType()->isVoidType() || 1040ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith !SemaRef.DeduceAutoType(Decl->getTypeSourceInfo(), Init, InitTSI)) 1041ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Loc, diag) << Init->getType(); 1042ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!InitTSI) { 1043ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setInvalidDecl(); 1044ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return true; 1045ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1046ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setTypeSourceInfo(InitTSI); 1047ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl->setType(InitTSI->getType()); 1048ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1049ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.AddInitializerToDecl(Decl, Init, /*DirectInit=*/false, 1050ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TypeMayContainAuto=*/false); 1051ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.FinalizeDeclaration(Decl); 1052b403d6d746239095a2c7bac958c924d92434e2b4Richard Smith SemaRef.CurContext->addHiddenDecl(Decl); 1053ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return false; 1054ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1055ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1056ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Produce a note indicating which begin/end function was implicitly called 1057ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// by a C++0x for-range statement. This is often not obvious from the code, 1058ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// nor from the diagnostics produced when analysing the implicit expressions 1059ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// required in a for-range statement. 1060ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithvoid NoteForRangeBeginEndFunction(Sema &SemaRef, Expr *E, 1061ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndFunction BEF) { 1062ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr *CE = dyn_cast<CallExpr>(E); 1063ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!CE) 1064ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return; 1065ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FunctionDecl *D = dyn_cast<FunctionDecl>(CE->getCalleeDecl()); 1066ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!D) 1067ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return; 1068ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc = D->getLocation(); 1069ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1070ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith std::string Description; 1071ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith bool IsTemplate = false; 1072ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FunctionTemplateDecl *FunTmpl = D->getPrimaryTemplate()) { 1073ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Description = SemaRef.getTemplateArgumentBindingsText( 1074ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FunTmpl->getTemplateParameters(), *D->getTemplateSpecializationArgs()); 1075ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IsTemplate = true; 1076ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1077ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1078ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Loc, diag::note_for_range_begin_end) 1079ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << BEF << IsTemplate << Description << E->getType(); 1080ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1081ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1082ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// Build a call to 'begin' or 'end' for a C++0x for-range statement. If the 1083ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// given LookupResult is non-empty, it is assumed to describe a member which 1084ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// will be invoked. Otherwise, the function will be found via argument 1085ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// dependent lookup. 1086ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smithstatic ExprResult BuildForRangeBeginEndCall(Sema &SemaRef, Scope *S, 1087ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation Loc, 1088ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *Decl, 1089ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndFunction BEF, 1090ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith const DeclarationNameInfo &NameInfo, 1091ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult &MemberLookup, 1092ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Range) { 1093ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult CallExpr; 1094ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!MemberLookup.empty()) { 1095ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult MemberRef = 1096ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.BuildMemberReferenceExpr(Range, Range->getType(), Loc, 1097ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*IsPtr=*/false, CXXScopeSpec(), 1098ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*Qualifier=*/0, MemberLookup, 1099ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TemplateArgs=*/0); 1100ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (MemberRef.isInvalid()) 1101ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1102ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr = SemaRef.ActOnCallExpr(S, MemberRef.get(), Loc, MultiExprArg(), 1103ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Loc, 0); 1104ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CallExpr.isInvalid()) 1105ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1106ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1107ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedSet<0> FoundNames; 1108ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // C++0x [stmt.ranged]p1: For the purposes of this name lookup, namespace 1109ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // std is an associated namespace. 1110ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedLookupExpr *Fn = 1111ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith UnresolvedLookupExpr::Create(SemaRef.Context, /*NamingClass=*/0, 1112ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NestedNameSpecifierLoc(), NameInfo, 1113ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*NeedsADL=*/true, /*Overloaded=*/false, 1114ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith FoundNames.begin(), FoundNames.end(), 1115ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*LookInStdNamespace=*/true); 1116ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith CallExpr = SemaRef.BuildOverloadedCallExpr(S, Fn, Fn, Loc, &Range, 1, Loc, 1117ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 0); 1118ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CallExpr.isInvalid()) { 1119ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SemaRef.Diag(Range->getLocStart(), diag::note_for_range_type) 1120ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << Range->getType(); 1121ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1122ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1123ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1124ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(SemaRef, Decl, CallExpr.get(), Loc, 1125ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1126ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(SemaRef, CallExpr.get(), BEF); 1127ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return ExprError(); 1128ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1129ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return CallExpr; 1130ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1131ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1132ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1133ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1134ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// ActOnCXXForRangeStmt - Check and build a C++0x for-range statement. 1135ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1136ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// C++0x [stmt.ranged]: 1137ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// A range-based for statement is equivalent to 1138ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1139ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// { 1140ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// auto && __range = range-init; 1141ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// for ( auto __begin = begin-expr, 1142ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// __end = end-expr; 1143ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// __begin != __end; 1144ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// ++__begin ) { 1145ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// for-range-declaration = *__begin; 1146ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// statement 1147ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// } 1148ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// } 1149ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// 1150ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// The body of the loop is not available yet, since it cannot be analysed until 1151ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// we have determined the type of the for-range-declaration. 1152ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult 1153ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithSema::ActOnCXXForRangeStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 1154ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Stmt *First, SourceLocation ColonLoc, Expr *Range, 1155ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RParenLoc) { 1156ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!First || !Range) 1157ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1158ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1159ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *DS = dyn_cast<DeclStmt>(First); 1160ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith assert(DS && "first part of for range not a decl stmt"); 1161ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1162ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!DS->isSingleDecl()) { 1163ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(DS->getStartLoc(), diag::err_type_defined_in_for_range); 1164ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1165ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1166ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DS->getSingleDecl()->isInvalidDecl()) 1167ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1168ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1169ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DiagnoseUnexpandedParameterPack(Range, UPPC_Expression)) 1170ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1171ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1172ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build auto && __range = range-init 1173ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RangeLoc = Range->getLocStart(); 1174ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *RangeVar = BuildForRangeVarDecl(*this, RangeLoc, 1175ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Context.getAutoRRefDeductType(), 1176ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__range"); 1177ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, RangeVar, Range, RangeLoc, 1178ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_deduction_failure)) 1179ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1180ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1181ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Claim the type doesn't contain auto: we've already done the checking. 1182ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclGroupPtrTy RangeGroup = 1183ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BuildDeclaratorGroup((Decl**)&RangeVar, 1, /*TypeMayContainAuto=*/false); 1184ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith StmtResult RangeDecl = ActOnDeclStmt(RangeGroup, RangeLoc, RangeLoc); 1185ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RangeDecl.isInvalid()) 1186ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1187ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1188ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return BuildCXXForRangeStmt(ForLoc, ColonLoc, RangeDecl.get(), 1189ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*BeginEndDecl=*/0, /*Cond=*/0, /*Inc=*/0, DS, 1190ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith RParenLoc); 1191ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1192ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1193ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// BuildCXXForRangeStmt - Build or instantiate a C++0x for-range statement. 1194ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult 1195ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithSema::BuildCXXForRangeStmt(SourceLocation ForLoc, SourceLocation ColonLoc, 1196ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Stmt *RangeDecl, Stmt *BeginEnd, Expr *Cond, 1197ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Inc, Stmt *LoopVarDecl, 1198ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RParenLoc) { 1199ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Scope *S = getCurScope(); 1200ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1201ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *RangeDS = cast<DeclStmt>(RangeDecl); 1202ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *RangeVar = cast<VarDecl>(RangeDS->getSingleDecl()); 1203ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType RangeVarType = RangeVar->getType(); 1204ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1205ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclStmt *LoopVarDS = cast<DeclStmt>(LoopVarDecl); 1206ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *LoopVar = cast<VarDecl>(LoopVarDS->getSingleDecl()); 1207ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1208ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith StmtResult BeginEndDecl = BeginEnd; 1209ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult NotEqExpr = Cond, IncrExpr = Inc; 1210ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1211ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!BeginEndDecl.get() && !RangeVarType->isDependentType()) { 1212ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith SourceLocation RangeLoc = RangeVar->getLocation(); 1213ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1214ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult RangeRef = BuildDeclRefExpr(RangeVar, 1215ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith RangeVarType.getNonReferenceType(), 1216ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1217ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RangeRef.isInvalid()) 1218ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1219ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1220ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType AutoType = Context.getAutoDeductType(); 1221ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Expr *Range = RangeVar->getInit(); 1222ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Range) 1223ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1224ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType RangeType = Range->getType(); 1225ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1226ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (RequireCompleteType(RangeLoc, RangeType, 1227ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith PDiag(diag::err_for_range_incomplete_type))) 1228ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1229ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1230ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build auto __begin = begin-expr, __end = end-expr. 1231ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *BeginVar = BuildForRangeVarDecl(*this, ColonLoc, AutoType, 1232ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__begin"); 1233ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VarDecl *EndVar = BuildForRangeVarDecl(*this, ColonLoc, AutoType, 1234ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith "__end"); 1235ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1236ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build begin-expr and end-expr and attach to __begin and __end variables. 1237ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BeginExpr, EndExpr; 1238ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (const ArrayType *UnqAT = RangeType->getAsArrayTypeUnsafe()) { 1239ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - if _RangeT is an array type, begin-expr and end-expr are __range and 1240ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // __range + __bound, respectively, where __bound is the array bound. If 1241ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // _RangeT is an array of unknown size or an array of incomplete type, 1242ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // the program is ill-formed; 1243ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1244ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // begin-expr is __range. 1245ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginExpr = RangeRef; 1246ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, BeginVar, RangeRef.get(), ColonLoc, 1247ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1248ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1249ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1250ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1251ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1252ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Find the array bound. 1253ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BoundExpr; 1254ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(UnqAT)) 1255ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr = Owned(IntegerLiteral::Create(Context, CAT->getSize(), 12561dd986dff9ddfbec687975700770bb377988e9edRichard Trieu Context.getPointerDiffType(), 12571dd986dff9ddfbec687975700770bb377988e9edRichard Trieu RangeLoc)); 1258ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith else if (const VariableArrayType *VAT = 1259ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith dyn_cast<VariableArrayType>(UnqAT)) 1260ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr = VAT->getSizeExpr(); 1261ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith else { 1262ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Can't be a DependentSizedArrayType or an IncompleteArrayType since 1263ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // UnqAT is not incomplete and Range is not type-dependent. 1264ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith assert(0 && "Unexpected array type in for-range"); 1265ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1266ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1267ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1268ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // end-expr is __range + __bound. 1269ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith EndExpr = ActOnBinOp(S, ColonLoc, tok::plus, RangeRef.get(), 1270ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BoundExpr.get()); 1271ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (EndExpr.isInvalid()) 1272ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1273ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (FinishForRangeVarDecl(*this, EndVar, EndExpr.get(), ColonLoc, 1274ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith diag::err_for_range_iter_deduction_failure)) { 1275ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1276ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1277ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1278ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1279ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclarationNameInfo BeginNameInfo(&PP.getIdentifierTable().get("begin"), 1280ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc); 1281ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclarationNameInfo EndNameInfo(&PP.getIdentifierTable().get("end"), 1282ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc); 1283ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1284ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult BeginMemberLookup(*this, BeginNameInfo, LookupMemberName); 1285ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupResult EndMemberLookup(*this, EndNameInfo, LookupMemberName); 1286ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1287ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (CXXRecordDecl *D = RangeType->getAsCXXRecordDecl()) { 1288ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - if _RangeT is a class type, the unqualified-ids begin and end are 1289ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // looked up in the scope of class _RangeT as if by class member access 1290ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // lookup (3.4.5), and if either (or both) finds at least one 1291ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // declaration, begin-expr and end-expr are __range.begin() and 1292ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // __range.end(), respectively; 1293ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupQualifiedName(BeginMemberLookup, D); 1294ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LookupQualifiedName(EndMemberLookup, D); 1295ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1296ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (BeginMemberLookup.empty() != EndMemberLookup.empty()) { 1297ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(ColonLoc, diag::err_for_range_member_begin_end_mismatch) 1298ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << RangeType << BeginMemberLookup.empty(); 1299ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1300ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1301ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } else { 1302ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // - otherwise, begin-expr and end-expr are begin(__range) and 1303ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // end(__range), respectively, where begin and end are looked up with 1304ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // argument-dependent lookup (3.4.2). For the purposes of this name 1305ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // lookup, namespace std is an associated namespace. 1306ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1307ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1308ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, BeginVar, 1309ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_begin, BeginNameInfo, 1310ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginMemberLookup, RangeRef.get()); 1311ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (BeginExpr.isInvalid()) 1312ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1313ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1314ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith EndExpr = BuildForRangeBeginEndCall(*this, S, ColonLoc, EndVar, 1315ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BEF_end, EndNameInfo, 1316ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith EndMemberLookup, RangeRef.get()); 1317ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (EndExpr.isInvalid()) 1318ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1319ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1320ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1321ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // C++0x [decl.spec.auto]p6: BeginType and EndType must be the same. 1322ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith QualType BeginType = BeginVar->getType(), EndType = EndVar->getType(); 1323ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Context.hasSameType(BeginType, EndType)) { 1324ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Diag(RangeLoc, diag::err_for_range_begin_end_types_differ) 1325ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith << BeginType << EndType; 1326ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1327ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1328ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1329ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1330ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith Decl *BeginEndDecls[] = { BeginVar, EndVar }; 1331ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Claim the type doesn't contain auto: we've already done the checking. 1332ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith DeclGroupPtrTy BeginEndGroup = 1333ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BuildDeclaratorGroup(BeginEndDecls, 2, /*TypeMayContainAuto=*/false); 1334ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginEndDecl = ActOnDeclStmt(BeginEndGroup, ColonLoc, ColonLoc); 1335ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1336ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult BeginRef = BuildDeclRefExpr(BeginVar, 1337ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginType.getNonReferenceType(), 1338ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1339ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult EndRef = BuildDeclRefExpr(EndVar, EndType.getNonReferenceType(), 1340ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith VK_LValue, ColonLoc); 1341ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1342ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check __begin != __end expression. 1343ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnBinOp(S, ColonLoc, tok::exclaimequal, 1344ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith BeginRef.get(), EndRef.get()); 1345ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnBooleanCondition(S, ColonLoc, NotEqExpr.get()); 1346ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr = ActOnFinishFullExpr(NotEqExpr.get()); 1347ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (NotEqExpr.isInvalid()) { 1348ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1349ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!Context.hasSameType(BeginType, EndType)) 1350ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, EndExpr.get(), BEF_end); 1351ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1352ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1353ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1354ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check ++__begin expression. 1355ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IncrExpr = ActOnUnaryOp(S, ColonLoc, tok::plusplus, BeginRef.get()); 1356ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith IncrExpr = ActOnFinishFullExpr(IncrExpr.get()); 1357ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (IncrExpr.isInvalid()) { 1358ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1359ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1360ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1361ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1362ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Build and check *__begin expression. 1363ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ExprResult DerefExpr = ActOnUnaryOp(S, ColonLoc, tok::star, BeginRef.get()); 1364ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (DerefExpr.isInvalid()) { 1365ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1366ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1367ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1368ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1369ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith // Attach *__begin as initializer for VD. 1370ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!LoopVar->isInvalidDecl()) { 1371ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith AddInitializerToDecl(LoopVar, DerefExpr.get(), /*DirectInit=*/false, 1372ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith /*TypeMayContainAuto=*/true); 1373ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (LoopVar->isInvalidDecl()) 1374ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin); 1375ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1376ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith } 1377ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1378ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return Owned(new (Context) CXXForRangeStmt(RangeDS, 1379ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith cast_or_null<DeclStmt>(BeginEndDecl.get()), 1380ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith NotEqExpr.take(), IncrExpr.take(), 1381ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith LoopVarDS, /*Body=*/0, ForLoc, 1382ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith ColonLoc, RParenLoc)); 1383ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1384ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1385ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// FinishCXXForRangeStmt - Attach the body to a C++0x for-range statement. 1386ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// This is a separate step from ActOnCXXForRangeStmt because analysis of the 1387ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// body cannot be performed until after the type of the range variable is 1388ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith/// determined. 1389ad762fcdc16b9e4705b12b09d92b8c026212b906Richard SmithStmtResult Sema::FinishCXXForRangeStmt(Stmt *S, Stmt *B) { 1390ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith if (!S || !B) 1391ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return StmtError(); 1392ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 1393ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith cast<CXXForRangeStmt>(S)->setBody(B); 1394ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith return S; 1395ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith} 1396ad762fcdc16b9e4705b12b09d92b8c026212b906Richard Smith 139757ad37823e198f977cac605dbfbaefb4daf325e9Chris LattnerStmtResult Sema::ActOnGotoStmt(SourceLocation GotoLoc, 139857ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner SourceLocation LabelLoc, 139957ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner LabelDecl *TheDecl) { 140057ad37823e198f977cac605dbfbaefb4daf325e9Chris Lattner getCurFunction()->setHasBranchIntoScope(); 1401ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner TheDecl->setUsed(); 1402ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattner return Owned(new (Context) GotoStmt(TheDecl, GotoLoc, LabelLoc)); 14035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 14045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 140560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 1406ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 14079ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *E) { 1408bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 14095f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 14105f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 14112877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth QualType DestTy = Context.getPointerType(Context.VoidTy.withConst()); 1412429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult ExprRes = Owned(E); 14135f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 1414429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley CheckSingleAssignmentConstraints(DestTy, ExprRes); 1415429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (ExprRes.isInvalid()) 1416429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1417429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley E = ExprRes.take(); 14182877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth if (DiagnoseAssignmentResult(ConvTy, StarLoc, DestTy, ETy, E, AA_Passing)) 14195f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 14205f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 1421b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 1422781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasIndirectGoto(); 1423b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 14245f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 14255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 14265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 142760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 14281b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 14295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 14305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 14315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 14324cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 14335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 14344cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 14358189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 14365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 14375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 143860d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 14391b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 14405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 14415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 14425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 14434cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 14445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 14454cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 14468189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 14475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 14485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1449dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \brief Determine whether the given expression is a candidate for 1450f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// copy elision in either a return statement or a throw expression. 14515077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1452f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param ReturnType If we're determining the copy elision candidate for 1453f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// a return statement, this is the return type of the function. If we're 1454f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// determining the copy elision candidate for a throw expression, this will 1455f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// be a NULL type. 14565077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 1457f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// \param E The expression being returned from the function or block, or 1458f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor/// being thrown. 14595077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 14604926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// \param AllowFunctionParameter Whether we allow function parameters to 14614926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// be considered NRVO candidates. C++ prohibits this for NRVO itself, but 14624926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// we re-use this logic to determine whether we should try to move as part of 14634926d832aa2f0af9d7c00633727d49e7967eb978Douglas Gregor/// a return or throw (which does allow function parameters). 14645077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// 14655077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// \returns The NRVO candidate variable, if the return statement may use the 14665077c3876beeaed32280af88244e8050078619a8Douglas Gregor/// NRVO, or NULL if there is no such candidate. 1467f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregorconst VarDecl *Sema::getCopyElisionCandidate(QualType ReturnType, 1468f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor Expr *E, 1469f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor bool AllowFunctionParameter) { 1470f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor QualType ExprType = E->getType(); 14713c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // - in a return statement in a function with ... 14723c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor // ... a class return type ... 1473f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType.isNull()) { 1474f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!ReturnType->isRecordType()) 1475f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1476f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // ... the same cv-unqualified type as the function return type ... 1477f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (!Context.hasSameUnqualifiedType(ReturnType, ExprType)) 1478f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor return 0; 1479f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor } 1480dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1481dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // ... the expression is the name of a non-volatile automatic object 1482f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor // (other than a function or catch-clause parameter)) ... 1483f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(E->IgnoreParens()); 14843c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!DR) 14855077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 14863c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 14873c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor if (!VD) 14885077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 1489dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1490f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor if (VD->hasLocalStorage() && !VD->isExceptionVariable() && 1491d86c477fb5d3fc34864afecbbb5443da9355e8fbDouglas Gregor !VD->getType()->isReferenceType() && !VD->hasAttr<BlocksAttr>() && 1492f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor !VD->getType().isVolatileQualified() && 14934a46c77813af1241139b81a086b539e4d734cb86Douglas Gregor ((VD->getKind() == Decl::Var) || 14944a46c77813af1241139b81a086b539e4d734cb86Douglas Gregor (AllowFunctionParameter && VD->getKind() == Decl::ParmVar))) 14955077c3876beeaed32280af88244e8050078619a8Douglas Gregor return VD; 1496dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 14975077c3876beeaed32280af88244e8050078619a8Douglas Gregor return 0; 14983c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor} 14993c9034cb7ff1d6c1e4ecd1b44c98f553df013c7cDouglas Gregor 150007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// \brief Perform the initialization of a potentially-movable value, which 150107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor/// is the result of return value. 1502cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// 1503cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// This routine implements C++0x [class.copy]p33, which attempts to treat 1504cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// returned lvalues as rvalues in certain cases (to prefer move construction), 1505cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor/// then falls back to treating them as lvalues if that failed. 1506dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiExprResult 150707f402cff25354c5f06f307f19b0c57c09d964bdDouglas GregorSema::PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 150807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor const VarDecl *NRVOCandidate, 150907f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor QualType ResultType, 151007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Expr *Value) { 1511cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // C++0x [class.copy]p33: 1512dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // When the criteria for elision of a copy operation are met or would 1513dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // be met save for the fact that the source object is a function 1514dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // parameter, and the object to be copied is designated by an lvalue, 1515cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // overload resolution to select the constructor for the copy is first 1516cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // performed as if the object were designated by an rvalue. 1517cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor ExprResult Res = ExprError(); 151807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor if (NRVOCandidate || getCopyElisionCandidate(ResultType, Value, true)) { 1519dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ImplicitCastExpr AsRvalue(ImplicitCastExpr::OnStack, 152007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getType(), CK_LValueToRValue, 152107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value, VK_XValue); 1522dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1523cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Expr *InitExpr = &AsRvalue; 1524dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializationKind Kind 152507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = InitializationKind::CreateCopy(Value->getLocStart(), 152607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value->getLocStart()); 152707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor InitializationSequence Seq(*this, Entity, Kind, &InitExpr, 1); 1528dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1529dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // [...] If overload resolution fails, or if the type of the first 1530cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // parameter of the selected constructor is not an rvalue reference 15310099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // to the object's type (possibly cv-qualified), overload resolution 1532cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // is performed again, considering the object as an lvalue. 1533cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor if (Seq.getKind() != InitializationSequence::FailedSequence) { 1534cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor for (InitializationSequence::step_iterator Step = Seq.step_begin(), 1535cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor StepEnd = Seq.step_end(); 1536cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor Step != StepEnd; ++Step) { 1537dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (Step->Kind 1538cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor != InitializationSequence::SK_ConstructorInitialization) 1539cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor continue; 1540dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1541dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CXXConstructorDecl *Constructor 1542cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor = cast<CXXConstructorDecl>(Step->Function.Function); 1543dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1544cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor const RValueReferenceType *RRefType 154507f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor = Constructor->getParamDecl(0)->getType() 154607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor ->getAs<RValueReferenceType>(); 1547dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1548cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // If we don't meet the criteria, break out now. 1549dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!RRefType || 155007f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor !Context.hasSameUnqualifiedType(RRefType->getPointeeType(), 155107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Context.getTypeDeclType(Constructor->getParent()))) 1552cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor break; 1553dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1554cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Promote "AsRvalue" to the heap, since we now need this 1555cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // expression node to persist. 155607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Value = ImplicitCastExpr::Create(Context, Value->getType(), 1557dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi CK_LValueToRValue, Value, 0, 155807f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor VK_XValue); 1559dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1560cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Complete type-checking the initialization of the return type 1561cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // using the constructor we found. 156207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = Seq.Perform(*this, Entity, Kind, MultiExprArg(&Value, 1)); 1563cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1564cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1565cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor } 1566dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1567cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // Either we didn't meet the criteria for treating an lvalue as an rvalue, 1568dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // above, or overload resolution failed. Either way, we need to try 1569cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor // (again) now with the return value expression as written. 1570cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor if (Res.isInvalid()) 157107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor Res = PerformCopyInitialization(Entity, SourceLocation(), Value); 1572dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1573cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor return Res; 1574cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor} 1575cc15f010672a13b38104a32e3cefc7adc07ffbf7Douglas Gregor 157627c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 15774eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 157860d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 15794eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 15804eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 15814eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 15829ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor BlockScopeInfo *CurBlock = getCurBlock(); 15837d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CurBlock->ReturnType.isNull()) { 1584c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 158516564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 158616564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 1587429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(RetValExp); 1588429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1589429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1590429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley RetValExp = Result.take(); 15917d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = RetValExp->getType(); 15927d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(RetValExp)) { 15937d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // We have to remove a 'const' added to copied-in variable which was 15947d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // part of the implementation spec. and not the actual qualifier for 15957d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // the variable. 15967d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CDRE->isConstQualAdded()) 159749f4e1cbd839da27ff4814b4ea6d85a79f786cbdJohn McCall CurBlock->ReturnType.removeLocalConst(); // FIXME: local??? 15987d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian } 1599c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 16007d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = Context.VoidTy; 16014eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 16027d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian QualType FnRetType = CurBlock->ReturnType; 16034cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1604711c52bb20d0c69063b52a99826fb7d2835501f1John McCall if (CurBlock->FunctionType->getAs<FunctionType>()->getNoReturnAttr()) { 16056c92fa75e62937f9738696840efcb258560f4568Mike Stump Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr) 16066c92fa75e62937f9738696840efcb258560f4568Mike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 16076c92fa75e62937f9738696840efcb258560f4568Mike Stump return StmtError(); 16086c92fa75e62937f9738696840efcb258560f4568Mike Stump } 16096c92fa75e62937f9738696840efcb258560f4568Mike Stump 16104eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 16114eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 16124eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 16135077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 16144eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 16154eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) { 16164eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 16174eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 16184eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 16195077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 16205077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp) { 16214cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 16225077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 16235077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 1624dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 16255077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 16265077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void block with an expression, continue checking 16275077c3876beeaed32280af88244e8050078619a8Douglas Gregor 16285077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 16295077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 16305077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 16315077c3876beeaed32280af88244e8050078619a8Douglas Gregor 16325077c3876beeaed32280af88244e8050078619a8Douglas Gregor // In C++ the return statement is handled via a copy initialization. 16335077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 1634f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 1635dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 163607f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 163707f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor NRVOCandidate != 0); 1638dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 163907f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 16405077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 16415077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 16425077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 16435077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 1644dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1645b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1646b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 16474765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1648b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 16494cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 16505077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 1651dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 16525077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 1653c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson } 1654dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 16555077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 165698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 16574cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1658dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 16595077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 16605077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 16615077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 16625077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1663dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 16645077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 16654eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 16665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 166760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 16689ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 1669fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor // Check for unexpanded parameter packs. 1670fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor if (RetValExp && DiagnoseUnexpandedParameterPack(RetValExp)) 1671fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor return StmtError(); 1672fc92137eee708b632c00a9b0934ff87aeae234a5Douglas Gregor 16739ea9bdbc14374f7bacdb50d3e52c664ff12150ffDouglas Gregor if (getCurBlock()) 16744eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 16754cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1676371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 1677f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 1678371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 167904a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall if (FD->hasAttr<NoReturnAttr>() || 168004a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall FD->getType()->getAs<FunctionType>()->getNoReturnAttr()) 16818662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 1682f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 1683f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump } else if (ObjCMethodDecl *MD = getCurMethodDecl()) 1684c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff FnRetType = MD->getResultType(); 1685c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff else // If we don't have a function/method context, bail. 1686c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 16871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16885077c3876beeaed32280af88244e8050078619a8Douglas Gregor ReturnStmt *Result = 0; 16895cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 16901be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor if (RetValExp && !RetValExp->isTypeDependent()) { 16911be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor // C99 6.8.6.4p1 (ext_ since GCC warns) 169265ce04bef06696379682410f399f37b43996d824Chris Lattner unsigned D = diag::ext_return_has_expr; 169365ce04bef06696379682410f399f37b43996d824Chris Lattner if (RetValExp->getType()->isVoidType()) 169465ce04bef06696379682410f399f37b43996d824Chris Lattner D = diag::ext_return_has_void_expr; 1695f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall else { 1696429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = Owned(RetValExp); 1697429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Result = IgnoredValueConversions(Result.take()); 1698429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1699429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 1700429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley RetValExp = Result.take(); 1701429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley RetValExp = ImpCastExprToType(RetValExp, Context.VoidTy, CK_ToVoid).take(); 1702f6a1648197562e0b133440d612d9af297d0a86ccJohn McCall } 17034cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1704e878eb035b343d7d819c092102364ec9849716aeChris Lattner // return (some void expression); is legal in C++. 1705e878eb035b343d7d819c092102364ec9849716aeChris Lattner if (D != diag::ext_return_has_void_expr || 1706e878eb035b343d7d819c092102364ec9849716aeChris Lattner !getLangOptions().CPlusPlus) { 1707e878eb035b343d7d819c092102364ec9849716aeChris Lattner NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 1708e878eb035b343d7d819c092102364ec9849716aeChris Lattner Diag(ReturnLoc, D) 1709e878eb035b343d7d819c092102364ec9849716aeChris Lattner << CurDecl->getDeclName() << isa<ObjCMethodDecl>(CurDecl) 1710e878eb035b343d7d819c092102364ec9849716aeChris Lattner << RetValExp->getSourceRange(); 1711e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 17121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1713b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 17144765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 17155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1716dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17175077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, 0); 17185077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else if (!RetValExp && !FnRetType->isDependentType()) { 17193c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 17203c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 17213c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 17223c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 17233c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 172408631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 17253c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 172608631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 17275077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc); 17285077c3876beeaed32280af88244e8050078619a8Douglas Gregor } else { 17295077c3876beeaed32280af88244e8050078619a8Douglas Gregor const VarDecl *NRVOCandidate = 0; 17305077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 17315077c3876beeaed32280af88244e8050078619a8Douglas Gregor // we have a non-void function with an expression, continue checking 17325077c3876beeaed32280af88244e8050078619a8Douglas Gregor 17335077c3876beeaed32280af88244e8050078619a8Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 17345077c3876beeaed32280af88244e8050078619a8Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 17355077c3876beeaed32280af88244e8050078619a8Douglas Gregor // function return. 17365077c3876beeaed32280af88244e8050078619a8Douglas Gregor 17375077c3876beeaed32280af88244e8050078619a8Douglas Gregor // In C++ the return statement is handled via a copy initialization. 17385077c3876beeaed32280af88244e8050078619a8Douglas Gregor // the C version of which boils down to CheckSingleAssignmentConstraints. 1739f5d8f466c3eebaffc51468812bdcbe7f0fe4891aDouglas Gregor NRVOCandidate = getCopyElisionCandidate(FnRetType, RetValExp, false); 1740dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi InitializedEntity Entity = InitializedEntity::InitializeResult(ReturnLoc, 174107f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, 174207f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor NRVOCandidate != 0); 1743dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ExprResult Res = PerformMoveOrCopyInitialization(Entity, NRVOCandidate, 174407f402cff25354c5f06f307f19b0c57c09d964bdDouglas Gregor FnRetType, RetValExp); 17455077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (Res.isInvalid()) { 17465077c3876beeaed32280af88244e8050078619a8Douglas Gregor // FIXME: Cleanup temporaries here, anyway? 17475077c3876beeaed32280af88244e8050078619a8Douglas Gregor return StmtError(); 17485077c3876beeaed32280af88244e8050078619a8Douglas Gregor } 17494cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 17505077c3876beeaed32280af88244e8050078619a8Douglas Gregor RetValExp = Res.takeAs<Expr>(); 1751dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (RetValExp) 17525077c3876beeaed32280af88244e8050078619a8Douglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 175366724ea67d7d598b937d86fa66f03f09a1c758f3Douglas Gregor } 1754dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1755b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall if (RetValExp) { 1756b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall CheckImplicitConversions(RetValExp, ReturnLoc); 17574765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall RetValExp = MaybeCreateExprWithCleanups(RetValExp); 1758b4eb64d8426c0eaa58d398961e0e74ff85063d7cJohn McCall } 17595077c3876beeaed32280af88244e8050078619a8Douglas Gregor Result = new (Context) ReturnStmt(ReturnLoc, RetValExp, NRVOCandidate); 1760898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 1761dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1762dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we need to check for the named return value optimization, save the 17635077c3876beeaed32280af88244e8050078619a8Douglas Gregor // return statement in our scope for later processing. 17645077c3876beeaed32280af88244e8050078619a8Douglas Gregor if (getLangOptions().CPlusPlus && FnRetType->isRecordType() && 17655077c3876beeaed32280af88244e8050078619a8Douglas Gregor !CurContext->isDependentContext()) 17665077c3876beeaed32280af88244e8050078619a8Douglas Gregor FunctionScopes.back()->Returns.push_back(Result); 1767dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17685077c3876beeaed32280af88244e8050078619a8Douglas Gregor return Owned(Result); 17695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 17705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1771810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 1772810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 1773810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 1774810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 1775810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 1776810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 1777810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 1778810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 1779703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson // Type dependent expressions will be checked during instantiation. 1780703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson if (E->isTypeDependent()) 1781703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson return false; 1782dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17837eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E->isLValue()) 1784810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 1785810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1786810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 1787810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 1788810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 17897eb0a9eb0cde8444b97f9c5b713d9be7a6f1e607John McCall if (E != E2 && E2->isLValue()) { 1790810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (!S.getLangOptions().HeinousExtensions) 1791810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 1792810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1793810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 1794810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 1795810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1796810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 1797810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 1798810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 1799810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1800810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 1801810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 1802810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 1803810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1804ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// isOperandMentioned - Return true if the specified operand # is mentioned 1805ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner/// anywhere in the decomposed asm string. 1806ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattnerstatic bool isOperandMentioned(unsigned OpNo, 1807ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner llvm::ArrayRef<AsmStmt::AsmStringPiece> AsmStrPieces) { 1808ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner for (unsigned p = 0, e = AsmStrPieces.size(); p != e; ++p) { 1809ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner const AsmStmt::AsmStringPiece &Piece = AsmStrPieces[p]; 1810ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (!Piece.isOperand()) continue; 1811ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1812ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 1813ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 1814ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner if (Piece.getOperandNo() == OpNo) 1815ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return true; 1816ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 1817ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1818ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner return false; 1819ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner} 1820810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1821ca57b4b7658a031b74cda5ac504311998be8e343Chris LattnerStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, bool IsSimple, 1822ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner bool IsVolatile, unsigned NumOutputs, 1823ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner unsigned NumInputs, IdentifierInfo **Names, 1824ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner MultiExprArg constraints, MultiExprArg exprs, 1825ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner Expr *asmString, MultiExprArg clobbers, 1826ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner SourceLocation RParenLoc, bool MSAsm) { 18273037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 18283037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 18293037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 18309ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr **Exprs = exprs.get(); 18319ae2f076ca5ab1feb3ba95629099ec2319833701John McCall StringLiteral *AsmString = cast<StringLiteral>(asmString); 18323037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 18333037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 183403eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson llvm::SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 18351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18361708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 18376bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (AsmString->isWide()) 18383037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 18393037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 18403037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 18411708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 18421708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 18436bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 18443037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 18453037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 18463037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1847ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef OutputName; 1848ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1849ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson OutputName = Names[i]->getName(); 1850ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1851ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 1852432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner if (!Context.Target.validateOutputConstraint(Info)) 18533037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1854432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 1855432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 18563037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1857d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 185872056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 1859810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 186072056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 1861dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 186272056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 186304728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 18641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 186544def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 186604728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 18673037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1868806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner llvm::SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 1869806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 187004728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 18711708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 18726bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 18733037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 18743037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 18753037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1876ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef InputName; 1877ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1878ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson InputName = Names[i]->getName(); 1879ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1880ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 1881beaaccd8e2a8748f77b66e2b330fb9136937e14cJay Foad if (!Context.Target.validateInputConstraint(OutputConstraintInfos.data(), 18822819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 18833037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1884432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 1885432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 1886d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 18873037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 188872056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 18893037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1890d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 189144def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 1892810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 189372056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1894d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 1895432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 189672056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 189704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 18983037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 189944def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 1900d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 190172056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1902d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 19031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump << InputExpr->getType() << Info.getConstraintStr() 190472056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 1905d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 1906d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 19071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1908429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultFunctionArrayLvalueConversion(Exprs[i]); 1909429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 1910429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 19111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1912429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Exprs[i] = Result.take(); 1913806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 191404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 19153037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 19166fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 19171708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 19181708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 19196bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 19203037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 19213037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 19223037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1923fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson llvm::StringRef Clobber = Literal->getString(); 19243037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1925fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson if (!Context.Target.isValidGCCRegisterName(Clobber)) 19263037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 19277765934ad7e157b5fcf925792a38e01b1edbcf8aDaniel Dunbar diag::err_asm_unknown_register_name) << Clobber); 19286fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 19293037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1930fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 1931dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm, 1932dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NumOutputs, NumInputs, Names, Constraints, Exprs, 1933966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson AsmString, NumClobbers, Clobbers, RParenLoc); 1934fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 1935fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 1936fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner llvm::SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 1937fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 1938fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 19392ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 19402ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 1941fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 1942fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 19431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1944806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 1945806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 1946806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 19471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1948806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 1949806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 1950806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 1951806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 19521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1953806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 1954935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner unsigned InputOpNo = i+NumOutputs; 1955f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 1956935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Expr *InputExpr = Exprs[InputOpNo]; 19577adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 19587adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 19597adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 1960806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 19611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1962aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // Decide if the input and output are in the same domain (integer/ptr or 1963aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // floating point. 1964aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner enum AsmDomain { 1965aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner AD_Int, AD_FP, AD_Other 1966aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner } InputDomain, OutputDomain; 1967dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1968aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (InTy->isIntegerType() || InTy->isPointerType()) 1969aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Int; 19700c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (InTy->isRealFloatingType()) 1971aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_FP; 1972aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 1973aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain = AD_Other; 19743351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 1975aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutTy->isIntegerType() || OutTy->isPointerType()) 1976aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Int; 19770c293ea13d452c1a47a05ada5a5ee9acc69c66ccDouglas Gregor else if (OutTy->isRealFloatingType()) 1978aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_FP; 1979aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner else 1980aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputDomain = AD_Other; 1981dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1982aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // They are ok if they are the same size and in the same domain. This 1983aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // allows tying things like: 1984aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int* 1985aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // void* to int if they are the same size. 1986aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // double to long double if they are the same size. 1987dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // 1988aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 1989aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 1990aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (OutSize == InSize && InputDomain == OutputDomain && 1991aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner InputDomain != AD_Other) 1992aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 1993dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1994aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 1995f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // then we can promote the smaller one to a larger input and the asm string 1996f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner // won't notice. 1997aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner bool SmallerValueMentioned = false; 1998ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner 1999ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the input and if the input was the smaller 2000ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // one, then we have to reject this asm. 2001935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (isOperandMentioned(InputOpNo, Pieces)) { 2002ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // This is a use in the asm string of the smaller operand. Since we 2003ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // codegen this by promoting to a wider value, the asm will get printed 2004ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // "wrong". 2005f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= InSize < OutSize; 2006ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner } 2007f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner if (isOperandMentioned(TiedTo, Pieces)) { 2008ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // If this is a reference to the output, and if the output is the larger 2009ca57b4b7658a031b74cda5ac504311998be8e343Chris Lattner // value, then it's ok because we'll promote the input to the larger type. 2010f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner SmallerValueMentioned |= OutSize < InSize; 2011806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 20121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2013aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 2014aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // output was a register, just extend the shorter one to the size of the 2015aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner // larger one. 2016aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner if (!SmallerValueMentioned && InputDomain != AD_Other && 2017aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 2018aab64d0b7f41ed30b15ba9210ed859424cbc7455Chris Lattner continue; 2019f0c4d28020fb13fdbf7d6fccfab1b7b6a118ad0eChris Lattner 2020935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // Either both of the operands were mentioned or the smaller one was 2021935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // mentioned. One more special case that we'll allow: if the tied input is 2022935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // integer, unmentioned, and is a constant, then we'll allow truncating it 2023935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner // down to the size of the destination. 2024935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner if (InputDomain == AD_Int && OutputDomain == AD_Int && 2025935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner !isOperandMentioned(InputOpNo, Pieces) && 2026935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner InputExpr->isEvaluatable(Context)) { 20274da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall CastKind castKind = 20284da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall (OutTy->isBooleanType() ? CK_IntegralToBoolean : CK_IntegralCast); 20294da89c87b2b6ca31f1015ec19aae65a02971ea9aJohn McCall InputExpr = ImpCastExprToType(InputExpr, OutTy, castKind).take(); 2030935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner Exprs[InputOpNo] = InputExpr; 2031935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner NS->setInputExpr(i, InputExpr); 2032935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner continue; 2033935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner } 2034935f0f01c1ed3c2052b797ac035d57a85b78adc4Chris Lattner 2035c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 2036806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 20377adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 2038806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 2039806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 2040806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 20411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2042fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 2043fe795956194141c91ae555985c9b930595bff43fChris Lattner} 20443b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 204560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2046431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 2047d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall SourceLocation RParen, Decl *Parm, 20489ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *Body) { 2049d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall VarDecl *Var = cast_or_null<VarDecl>(Parm); 2050160b5630aa781ac348303e1ae088d27016637778Douglas Gregor if (Var && Var->isInvalidDecl()) 2051160b5630aa781ac348303e1ae088d27016637778Douglas Gregor return StmtError(); 2052dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 20539ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtCatchStmt(AtLoc, RParen, Var, Body)); 20543b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 20553b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 205660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 20579ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body) { 20589ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, Body)); 2059161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 2060bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 206160d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2062dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 20639ae2f076ca5ab1feb3ba95629099ec2319833701John McCall MultiStmtArg CatchStmts, Stmt *Finally) { 2064da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson if (!getLangOptions().ObjCExceptions) 2065da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@try"; 2066da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 2067781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 20688f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor unsigned NumCatchStmts = CatchStmts.size(); 20699ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(ObjCAtTryStmt::Create(Context, AtLoc, Try, 20709ae2f076ca5ab1feb3ba95629099ec2319833701John McCall CatchStmts.release(), 20718f5e3dd32e443768d9dbbad7191e123e6733750cDouglas Gregor NumCatchStmts, 20729ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Finally)); 2073bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 2074bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 207560d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult Sema::BuildObjCAtThrowStmt(SourceLocation AtLoc, 20769ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Expr *Throw) { 2077d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (Throw) { 2078429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultLvalueConversion(Throw); 2079429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2080429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 20815e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 2082429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley Throw = Result.take(); 2083d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor QualType ThrowType = Throw->getType(); 2084d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor // Make sure the expression type is an ObjC pointer or "void *". 2085d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!ThrowType->isDependentType() && 2086d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor !ThrowType->isObjCObjectPointerType()) { 2087d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor const PointerType *PT = ThrowType->getAs<PointerType>(); 2088d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor if (!PT || !PT->getPointeeType()->isVoidType()) 2089d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 2090d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor << Throw->getType() << Throw->getSourceRange()); 2091d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 2092d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor } 2093dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 20949ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtThrowStmt(AtLoc, Throw)); 2095d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor} 2096d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor 209760d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2098dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2099d1377b25a36adfe6604f78cbd3a23a07cf0f29e6Douglas Gregor Scope *CurScope) { 2100da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson if (!getLangOptions().ObjCExceptions) 2101da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson Diag(AtLoc, diag::err_objc_exceptions_disabled) << "@throw"; 2102da4b7cf09ebfd4e4098b516081fa9dae2f5c99e0Anders Carlsson 21039ae2f076ca5ab1feb3ba95629099ec2319833701John McCall if (!Throw) { 2104e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 2105e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 2106e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 2107e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 2108e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 2109e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 21104ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 2111dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 2112dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 21139ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return BuildObjCAtThrowStmt(AtLoc, Throw); 211439f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 2115bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 211660d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 21179ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, Expr *SyncExpr, 21189ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *SyncBody) { 2119781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 212046c3c4ba78766ac0f1c5ec631b424773e21f5271Chris Lattner 2121429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley ExprResult Result = DefaultLvalueConversion(SyncExpr); 2122429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley if (Result.isInvalid()) 2123429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley return StmtError(); 21245e3c67b4bd894a926282d24b4d0cbc0e123c9f4aJohn McCall 2125429bb276991ff2dbc7c5b438828b9b7737cb15ebJohn Wiegley SyncExpr = Result.take(); 2126a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 21278fdc13a78a43f09ac396e682c35d57ca0b48216dDouglas Gregor if (!SyncExpr->getType()->isDependentType() && 21288fdc13a78a43f09ac396e682c35d57ca0b48216dDouglas Gregor !SyncExpr->getType()->isObjCObjectPointerType()) { 21296217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const PointerType *PT = SyncExpr->getType()->getAs<PointerType>(); 2130a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner if (!PT || !PT->getPointeeType()->isVoidType()) 2131a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner return StmtError(Diag(AtLoc, diag::error_objc_synchronized_expects_object) 2132a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner << SyncExpr->getType() << SyncExpr->getSourceRange()); 2133a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 21341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21359ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, SyncExpr, SyncBody)); 2136fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 21374b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 21384b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 21394b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 214060d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 2141d226f65006733ed7f709c3174f22ce33391cb58fJohn McCallSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, Decl *ExDecl, 21429ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt *HandlerBlock) { 21434b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 21448189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 2145d226f65006733ed7f709c3174f22ce33391cb58fJohn McCall cast_or_null<VarDecl>(ExDecl), 21469ae2f076ca5ab1feb3ba95629099ec2319833701John McCall HandlerBlock)); 21474b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 21488351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 21493c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 21503c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 2151c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlclass TypeWithHandler { 2152c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType t; 2153c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *stmt; 2154c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlpublic: 2155c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler(const QualType &type, CXXCatchStmt *statement) 2156c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl : t(type), stmt(statement) {} 2157c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 21580953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // An arbitrary order is fine as long as it places identical 21590953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // types next to each other. 2160c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator<(const TypeWithHandler &y) const { 21610953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() < y.t.getAsOpaquePtr()) 2162c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return true; 21630953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() > y.t.getAsOpaquePtr()) 2164c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return false; 2165c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl else 2166c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return getTypeSpecStartLoc() < y.getTypeSpecStartLoc(); 2167c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 21681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2169c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator==(const TypeWithHandler& other) const { 21700953e767ff7817f97b3ab20896b229891eeff45bJohn McCall return t == other.t; 2171c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 21721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2173c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *getCatchStmt() const { return stmt; } 2174c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl SourceLocation getTypeSpecStartLoc() const { 2175c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return stmt->getExceptionDecl()->getTypeSpecStartLoc(); 2176c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 2177c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl}; 2178c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 21793c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 21803c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 21818351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 21828351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 218360d7b3a319d84d688752be3870615ac0f111fb16John McCallStmtResult 21849ae2f076ca5ab1feb3ba95629099ec2319833701John McCallSema::ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 21858351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 2186729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson // Don't report an error if 'try' is used in system headers. 218715348aeb81285c75b2e92b5bf8d2db3445d147c2Anders Carlsson if (!getLangOptions().CXXExceptions && 2188729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson !getSourceManager().isInSystemHeader(TryLoc)) 2189729b853f4bfa83e53c638a06a9dccf83b4e1f720Anders Carlsson Diag(TryLoc, diag::err_exceptions_disabled) << "try"; 21907f11d9cf5df1f8ce82af46eabc4ec5cec7d580b0Anders Carlsson 21918351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 21928351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 21938351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 21949ae2f076ca5ab1feb3ba95629099ec2319833701John McCall Stmt **Handlers = RawHandlers.get(); 21958351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 2196c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::SmallVector<TypeWithHandler, 8> TypesWithHandlers; 21971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (unsigned i = 0; i < NumHandlers; ++i) { 21998351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl CXXCatchStmt *Handler = llvm::cast<CXXCatchStmt>(Handlers[i]); 2200c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (!Handler->getExceptionDecl()) { 2201c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (i < NumHandlers - 1) 2202c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return StmtError(Diag(Handler->getLocStart(), 2203c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::err_early_catch_all)); 22041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2205c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl continue; 2206c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 22071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2208c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CaughtType = Handler->getCaughtType(); 2209c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CanonicalCaughtType = Context.getCanonicalType(CaughtType); 2210c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypesWithHandlers.push_back(TypeWithHandler(CanonicalCaughtType, Handler)); 2211c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 2212c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 2213c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl // Detect handlers for the same type as an earlier one. 2214c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (NumHandlers > 1) { 2215c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::array_pod_sort(TypesWithHandlers.begin(), TypesWithHandlers.end()); 22161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2217c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler prev = TypesWithHandlers[0]; 2218c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl for (unsigned i = 1; i < TypesWithHandlers.size(); ++i) { 2219c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler curr = TypesWithHandlers[i]; 22201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2221c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (curr == prev) { 2222c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(curr.getTypeSpecStartLoc(), 2223c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::warn_exception_caught_by_earlier_handler) 2224c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << curr.getCatchStmt()->getCaughtType().getAsString(); 2225c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(prev.getTypeSpecStartLoc(), 2226c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::note_previous_exception_handler) 2227c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << prev.getCatchStmt()->getCaughtType().getAsString(); 2228c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 22291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2230c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl prev = curr; 2231c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 22328351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 22331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2234781472fe99a120098c631b0cbe33c89f8cef5e70John McCall getCurFunction()->setHasBranchProtectedScope(); 2235b60a77e453d32db0ab1914d28e175c2defc0eb65John McCall 22368351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 22378351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 22388351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 22398351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 22408351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 22418351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 22429ae2f076ca5ab1feb3ba95629099ec2319833701John McCall return Owned(CXXTryStmt::Create(Context, TryLoc, TryBlock, 2243a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig Handlers, NumHandlers)); 22448351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 224528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 224628bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 224728bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHTryBlock(bool IsCXXTry, 224828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley SourceLocation TryLoc, 224928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *TryBlock, 225028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Handler) { 225128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(TryBlock && Handler); 225228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 225328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley getCurFunction()->setHasBranchProtectedScope(); 225428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 225528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHTryStmt::Create(Context,IsCXXTry,TryLoc,TryBlock,Handler)); 225628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 225728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 225828bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 225928bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHExceptBlock(SourceLocation Loc, 226028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Expr *FilterExpr, 226128bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Block) { 226228bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(FilterExpr && Block); 226328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 226428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley if(!FilterExpr->getType()->isIntegerType()) { 226528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return StmtError(Diag(FilterExpr->getExprLoc(), diag::err_filter_expression_integral) << FilterExpr->getType()); 226628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley } 226728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 226828bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHExceptStmt::Create(Context,Loc,FilterExpr,Block)); 226928bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 227028bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 227128bbe4b8acc338476fe0825769b41fb32b423c72John WiegleyStmtResult 227228bbe4b8acc338476fe0825769b41fb32b423c72John WiegleySema::ActOnSEHFinallyBlock(SourceLocation Loc, 227328bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley Stmt *Block) { 227428bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley assert(Block); 227528bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley return Owned(SEHFinallyStmt::Create(Context,Loc,Block)); 227628bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley} 227728bbe4b8acc338476fe0825769b41fb32b423c72John Wiegley 2278