SemaStmt.cpp revision f9f627dbbc62fbf51b906c24c783b4249dc7e9bb
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 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "Sema.h" 1518ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor#include "SemaInit.h" 1651fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson#include "clang/AST/APValue.h" 17f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner#include "clang/AST/ASTContext.h" 18c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 1984fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor#include "clang/AST/ExprCXX.h" 20419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner#include "clang/AST/ExprObjC.h" 2116f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtObjC.h" 2216f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtCXX.h" 2384fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor#include "clang/Lex/Preprocessor.h" 246fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson#include "clang/Basic/TargetInfo.h" 25c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/STLExtras.h" 26c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl#include "llvm/ADT/SmallVector.h" 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 296b1d283fe879fb11d7ce7a69feecf66e77b0eaf3Anders CarlssonSema::OwningStmtResult Sema::ActOnExprStmt(FullExprArg expr) { 306b1d283fe879fb11d7ce7a69feecf66e77b0eaf3Anders Carlsson Expr *E = expr->takeAs<Expr>(); 311b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(E && "ActOnExprStmt(): missing expression"); 3216b10378a93e8644008289fd86c1caf737d1395cFariborz Jahanian if (E->getType()->isObjCInterfaceType()) { 3316b10378a93e8644008289fd86c1caf737d1395cFariborz Jahanian if (LangOpts.ObjCNonFragileABI) 3416b10378a93e8644008289fd86c1caf737d1395cFariborz Jahanian Diag(E->getLocEnd(), diag::err_indirection_requires_nonfragile_object) 3516b10378a93e8644008289fd86c1caf737d1395cFariborz Jahanian << E->getType(); 3616b10378a93e8644008289fd86c1caf737d1395cFariborz Jahanian else 3716b10378a93e8644008289fd86c1caf737d1395cFariborz Jahanian Diag(E->getLocEnd(), diag::err_direct_interface_unsupported) 3816b10378a93e8644008289fd86c1caf737d1395cFariborz Jahanian << E->getType(); 3916b10378a93e8644008289fd86c1caf737d1395cFariborz Jahanian return StmtError(); 4016b10378a93e8644008289fd86c1caf737d1395cFariborz Jahanian } 41834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // C99 6.8.3p2: The expression in an expression statement is evaluated as a 42834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // void expression for its side effects. Conversion to void allows any 43834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // operand, even incomplete types. 44a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 45834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // Same thing in for stmt first clause (when expr) and third clause. 46a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(static_cast<Stmt*>(E)); 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 50a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian RedlSema::OwningStmtResult Sema::ActOnNullStmt(SourceLocation SemiLoc) { 518189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) NullStmt(SemiLoc)); 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 54682bf92db408a6cbc3d37b5496a99b6ef85041ecChris LattnerSema::OwningStmtResult Sema::ActOnDeclStmt(DeclGroupPtrTy dg, 55a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl SourceLocation StartLoc, 56a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl SourceLocation EndLoc) { 5720401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 59682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // If we have an invalid decl, just return an error. 6020401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner if (DG.isNull()) return StmtError(); 611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6224e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return Owned(new (Context) DeclStmt(DG, StartLoc, EndLoc)); 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 65a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanianvoid Sema::ActOnForEachDeclStmt(DeclGroupPtrTy dg) { 66a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 67a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian 68a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian // If we have an invalid decl, just return. 69a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian if (DG.isNull() || !DG.isSingleDecl()) return; 70a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian // suppress any potential 'unused variable' warning. 71a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian DG.getSingleDecl()->setUsed(); 72a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian} 73a7cf23a72b0846fc5aacf3f38bb8c8f9e76784cfFariborz Jahanian 74636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlssonvoid Sema::DiagnoseUnusedExprResult(const Stmt *S) { 75754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson const Expr *E = dyn_cast_or_null<Expr>(S); 76636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (!E) 77636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 78636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 79636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson // Ignore expressions that have void type. 80636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (E->getType()->isVoidType()) 81636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceLocation Loc; 84636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson SourceRange R1, R2; 85df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (!E->isUnusedResultAWarning(Loc, R1, R2, Context)) 86636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson return; 871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 88419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // Okay, we have an unused result. Depending on what the base expression is, 89419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // we might want to make a more specific diagnostic. Check for one of these 90419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner // cases now. 91419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner unsigned DiagID = diag::warn_unused_expr; 92419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner E = E->IgnoreParens(); 9309105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian if (isa<ObjCImplicitSetterGetterRefExpr>(E)) 94419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner DiagID = diag::warn_unused_property_expr; 95bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner 964dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor if (const CXXExprWithTemporaries *Temps = dyn_cast<CXXExprWithTemporaries>(E)) 974dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor E = Temps->getSubExpr(); 984dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor if (const CXXZeroInitValueExpr *Zero = dyn_cast<CXXZeroInitValueExpr>(E)) { 994dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor if (const RecordType *RecordT = Zero->getType()->getAs<RecordType>()) 1004dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor if (CXXRecordDecl *RecordD = dyn_cast<CXXRecordDecl>(RecordT->getDecl())) 1014dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor if (!RecordD->hasTrivialDestructor()) 1024dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor return; 1034dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor } 1044dffad64c5c7106dc5ac506be94944299c8f7bc3Douglas Gregor 105bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { 106bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // If the callee has attribute pure, const, or warn_unused_result, warn with 107bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // a more specific message to make it clear what is happening. 108d20254f2875d0004c57ee766f258dbcee29f4841Nuno Lopes if (const Decl *FD = CE->getCalleeDecl()) { 109bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<WarnUnusedResultAttr>()) { 110bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "warn_unused_result"; 111bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 112bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 113bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<PureAttr>()) { 114bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "pure"; 115bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 116bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 117bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<ConstAttr>()) { 118bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "const"; 119bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 120bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 121bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 122bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 1231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 124419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner Diag(Loc, DiagID) << R1 << R2; 125636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson} 126636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 127a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian RedlAction::OwningStmtResult 1281b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 129a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 130a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 131a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 132c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 133c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 134c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus) { 135c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 136c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 137c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 138c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 139c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 140c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 141c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 142c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 143c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 1441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 145c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 1464afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 147c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 148c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 149c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 15098414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 15198414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 152636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson // Ignore statements that are last in a statement expression. 153636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (isStmtExpr && i == NumElts - 1) 15498414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 1551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 156636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson DiagnoseUnusedExprResult(Elts[i]); 15798414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 158a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 1598189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 162117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlAction::OwningStmtResult 163117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlSema::ActOnCaseStmt(SourceLocation CaseLoc, ExprArg lhsval, 164117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl SourceLocation DotDotDotLoc, ExprArg rhsval, 16524e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 166117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl assert((lhsval.get() != 0) && "missing expression in case statement"); 167117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.4.2p3: The expression shall be an integer constant. 1691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // However, GCC allows any evaluatable integer expression. 170117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Expr *LHSVal = static_cast<Expr*>(lhsval.get()); 1711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!LHSVal->isTypeDependent() && !LHSVal->isValueDependent() && 172dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(LHSVal)) 17324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1756c36be5b383875b490684bcf439d6d427298c1afChris Lattner // GCC extension: The expression shall be an integer constant. 176117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 177117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Expr *RHSVal = static_cast<Expr*>(rhsval.get()); 178dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (RHSVal && !RHSVal->isTypeDependent() && !RHSVal->isValueDependent() && 179dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(RHSVal)) { 180f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner RHSVal = 0; // Recover by just forgetting about it. 181117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl rhsval = 0; 182117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl } 183117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 184bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner if (getSwitchStack().empty()) { 1858a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner Diag(CaseLoc, diag::err_case_not_in_switch); 18624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1878a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 189117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl // Only now release the smart pointers. 190117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl lhsval.release(); 191117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl rhsval.release(); 192dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc, DotDotDotLoc, 193dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ColonLoc); 194bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner getSwitchStack().back()->addSwitchCase(CS); 195117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 19824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 19924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattnervoid Sema::ActOnCaseStmtBody(StmtTy *caseStmt, StmtArg subStmt) { 20024e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 201f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *SubStmt = subStmt.takeAs<Stmt>(); 20224e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 20324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 20424e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 205117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlAction::OwningStmtResult 2061eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 207117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl StmtArg subStmt, Scope *CurScope) { 208f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *SubStmt = subStmt.takeAs<Stmt>(); 209117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 210bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner if (getSwitchStack().empty()) { 2110fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 212117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 2130fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 214117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 215dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, ColonLoc, SubStmt); 216bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner getSwitchStack().back()->addSwitchCase(DS); 217117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 220de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 2211b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II, 222de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl SourceLocation ColonLoc, StmtArg subStmt) { 223f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *SubStmt = subStmt.takeAs<Stmt>(); 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 225ea29a3a0d6948c4a51a261d19ec1a585d2a9c779Chris Lattner LabelStmt *&LabelDecl = getLabelMap()[II]; 226de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If not forward referenced or defined already, just create a new LabelStmt. 228caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff if (LabelDecl == 0) 229caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff return Owned(LabelDecl = new (Context) LabelStmt(IdentLoc, II, SubStmt)); 230de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(LabelDecl->getID() == II && "Label mismatch!"); 232de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was either forward reference or multiply defined. If 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // multiply defined, reject it now. 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LabelDecl->getSubStmt()) { 23608631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << LabelDecl->getID(); 2375f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(LabelDecl->getIdentLoc(), diag::note_previous_definition); 238de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 240de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was forward declared, and we just found its real 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // definition. Fill in the forward definition and return it. 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelDecl->setIdentLoc(IdentLoc); 2440fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner LabelDecl->setSubStmt(SubStmt); 245de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(LabelDecl); 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 248de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 24999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas GregorSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, DeclPtrTy CondVar, 250de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg ThenVal, SourceLocation ElseLoc, 251de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg ElseVal) { 252a99fad8ff134273fe85f2970c7d89133d1218900Anders Carlsson OwningExprResult CondResult(CondVal.release()); 2531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2548cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor VarDecl *ConditionVar = 0; 25599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondVar.get()) { 25699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor ConditionVar = CondVar.getAs<VarDecl>(); 25799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult = CheckConditionVariable(ConditionVar); 25899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 25999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 2608cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor } 26199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 26299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 26399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 2648cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor 26599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CheckBooleanCondition(ConditionExpr, IfLoc)) { 26699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult = ConditionExpr; 2675a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 268d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor } 269de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 270e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Stmt *thenStmt = ThenVal.takeAs<Stmt>(); 271754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(thenStmt); 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2732d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 2742d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 2752d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 2762d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 2771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!ElseVal.get()) { 2782d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 2792d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 2802d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 2812d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 282754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson Stmt *elseStmt = ElseVal.takeAs<Stmt>(); 283754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(elseStmt); 2841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 285a99fad8ff134273fe85f2970c7d89133d1218900Anders Carlsson CondResult.release(); 28699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return Owned(new (Context) IfStmt(IfLoc, ConditionVar, ConditionExpr, 28799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor thenStmt, ElseLoc, elseStmt)); 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 290de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 29199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas GregorSema::ActOnStartOfSwitchStmt(FullExprArg cond, DeclPtrTy CondVar) { 29299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor OwningExprResult CondResult(cond.release()); 29399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 294d3d5301c44138b92bf01286183f5bf310cdd37cfDouglas Gregor VarDecl *ConditionVar = 0; 29599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondVar.get()) { 29699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor ConditionVar = CondVar.getAs<VarDecl>(); 29799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult = CheckConditionVariable(ConditionVar); 29899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 29999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 300d3d5301c44138b92bf01286183f5bf310cdd37cfDouglas Gregor } 301be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor SwitchStmt *SS = new (Context) SwitchStmt(ConditionVar, 302be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor CondResult.takeAs<Expr>()); 303bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner getSwitchStack().push_back(SS); 304de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 305c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson} 3066c36be5b383875b490684bcf439d6d427298c1afChris Lattner 307f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 308f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 309f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 310f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 311f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 3121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, 313f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 314f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 315f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 316f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 317f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.extend(NewWidth); 318f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 319f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor 320f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // If the input was signed and negative and the output is 321f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // unsigned, don't bother to warn: this is implementation-defined 322f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // behavior. 323f9f627dbbc62fbf51b906c24c783b4249dc7e9bbDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 324f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 325f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 326f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 327f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.trunc(NewWidth); 328b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 329f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.extend(Val.getBitWidth()); 330b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 331f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 332d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 3331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 334f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 335f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 336f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.trunc(NewWidth); 337b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 338f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 339f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 340f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 3412853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // We don't diagnose this overflow, because it is implementation-defined 3422853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // behavior. 3432853eac24e2e70a74d7da817653b0528b976039fDouglas Gregor // FIXME: Introduce a second, default-ignored warning for this case? 344f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 345f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 346f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 347f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 348f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3490471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3500471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3510471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3520471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3530471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3540471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3550e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3560e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3570e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3580e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3590471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3600471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3610471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3620471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3630471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3640471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3650471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 366764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 367764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 368764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 369764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 370764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 371764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 372764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 373764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 374764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 375764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 376764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 377764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 378764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 379764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 380ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// CmpEnumVals - Comparison predicate for sorting enumeration values. 381ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 382ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool CmpEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 383ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 384ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 385ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first < rhs.first; 386ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 387ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 388ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// EqEnumVals - Comparison preficate for uniqing enumeration values. 389ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor/// 390ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregorstatic bool EqEnumVals(const std::pair<llvm::APSInt, EnumConstantDecl*>& lhs, 391ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const std::pair<llvm::APSInt, EnumConstantDecl*>& rhs) 392ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor{ 393ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor return lhs.first == rhs.first; 394ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor} 395ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 3965f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// GetTypeBeforeIntegralPromotion - Returns the pre-promotion type of 3975f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// potentially integral-promoted expression @p expr. 3985f04881eb025f61396d0555d8173730fe2759e0aChris Lattnerstatic QualType GetTypeBeforeIntegralPromotion(const Expr* expr) { 3995f04881eb025f61396d0555d8173730fe2759e0aChris Lattner const ImplicitCastExpr *ImplicitCast = 4005f04881eb025f61396d0555d8173730fe2759e0aChris Lattner dyn_cast_or_null<ImplicitCastExpr>(expr); 4015f04881eb025f61396d0555d8173730fe2759e0aChris Lattner if (ImplicitCast != NULL) { 4025f04881eb025f61396d0555d8173730fe2759e0aChris Lattner const Expr *ExprBeforePromotion = ImplicitCast->getSubExpr(); 4035f04881eb025f61396d0555d8173730fe2759e0aChris Lattner QualType TypeBeforePromotion = ExprBeforePromotion->getType(); 4045f04881eb025f61396d0555d8173730fe2759e0aChris Lattner if (TypeBeforePromotion->isIntegralType()) { 4055f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return TypeBeforePromotion; 4065f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 4075f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 4085f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return expr->getType(); 4095f04881eb025f61396d0555d8173730fe2759e0aChris Lattner} 4105f04881eb025f61396d0555d8173730fe2759e0aChris Lattner 4110be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor/// \brief Check (and possibly convert) the condition in a switch 4120be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor/// statement in C++. 4130be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregorstatic bool CheckCXXSwitchCondition(Sema &S, SourceLocation SwitchLoc, 4140be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor Expr *&CondExpr) { 4150be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (CondExpr->isTypeDependent()) 4160be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor return false; 4170be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4180be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor QualType CondType = CondExpr->getType(); 4190be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4200be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // C++ 6.4.2.p2: 4210be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // The condition shall be of integral type, enumeration type, or of a class 4220be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // type for which a single conversion function to integral or enumeration 4230be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // type exists (12.3). If the condition is of class type, the condition is 4240be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // converted by calling that conversion function, and the result of the 4250be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // conversion is used in place of the original condition for the remainder 4260be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // of this section. Integral promotions are performed. 4270be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4280be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // Make sure that the condition expression has a complete type, 4290be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // otherwise we'll never find any conversions. 4300be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (S.RequireCompleteType(SwitchLoc, CondType, 4310be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor PDiag(diag::err_switch_incomplete_class_type) 4320be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << CondExpr->getSourceRange())) 4330be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor return true; 4340be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4350be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor llvm::SmallVector<CXXConversionDecl *, 4> ViableConversions; 4360be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor llvm::SmallVector<CXXConversionDecl *, 4> ExplicitConversions; 4370be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (const RecordType *RecordTy = CondType->getAs<RecordType>()) { 438eec51cf1ba5f0e62c9cdb81b5c63babdd6e649abJohn McCall const UnresolvedSetImpl *Conversions 4390be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor = cast<CXXRecordDecl>(RecordTy->getDecl()) 4400be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ->getVisibleConversionFunctions(); 441eec51cf1ba5f0e62c9cdb81b5c63babdd6e649abJohn McCall for (UnresolvedSetImpl::iterator I = Conversions->begin(), 4420be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor E = Conversions->end(); I != E; ++I) { 4430be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(*I)) 4440be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (Conversion->getConversionType().getNonReferenceType() 4450be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ->isIntegralType()) { 4460be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (Conversion->isExplicit()) 4470be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ExplicitConversions.push_back(Conversion); 4480be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor else 4490be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ViableConversions.push_back(Conversion); 4500be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 4510be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 4520be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4530be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor switch (ViableConversions.size()) { 4540be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor case 0: 4550be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (ExplicitConversions.size() == 1) { 4560be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // The user probably meant to invoke the given explicit 4570be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // conversion; use it. 4580be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor QualType ConvTy 4590be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor = ExplicitConversions[0]->getConversionType() 4600be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor .getNonReferenceType(); 4610be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor std::string TypeStr; 4620be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ConvTy.getAsStringInternal(TypeStr, S.Context.PrintingPolicy); 4630be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4640be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor S.Diag(SwitchLoc, diag::err_switch_explicit_conversion) 4650be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << CondType << ConvTy << CondExpr->getSourceRange() 4660be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << CodeModificationHint::CreateInsertion(CondExpr->getLocStart(), 4670be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor "static_cast<" + TypeStr + ">(") 4680be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << CodeModificationHint::CreateInsertion( 4690be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor S.PP.getLocForEndOfToken(CondExpr->getLocEnd()), 4700be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ")"); 4710be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor S.Diag(ExplicitConversions[0]->getLocation(), 4720be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor diag::note_switch_conversion) 4730be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << ConvTy->isEnumeralType() << ConvTy; 4740be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4750be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // If we aren't in a SFINAE context, build a call to the 4760be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // explicit conversion function. 4770be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (S.isSFINAEContext()) 4780be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor return true; 4790be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4800be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor CondExpr = S.BuildCXXMemberCallExpr(CondExpr, ExplicitConversions[0]); 4810be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 4820be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4830be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // We'll complain below about a non-integral condition type. 4840be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor break; 4850be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4860be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor case 1: 4870be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // Apply this conversion. 4880be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor CondExpr = S.BuildCXXMemberCallExpr(CondExpr, ViableConversions[0]); 4890be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor break; 4900be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4910be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor default: 4920be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor S.Diag(SwitchLoc, diag::err_switch_multiple_conversions) 4930be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << CondType << CondExpr->getSourceRange(); 4940be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor for (unsigned I = 0, N = ViableConversions.size(); I != N; ++I) { 4950be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor QualType ConvTy 4960be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor = ViableConversions[I]->getConversionType().getNonReferenceType(); 4970be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor S.Diag(ViableConversions[I]->getLocation(), 4980be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor diag::note_switch_conversion) 4990be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << ConvTy->isEnumeralType() << ConvTy; 5000be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 5010be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor return true; 5020be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 5030be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 5040be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 5050be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor return false; 5060be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor} 5070be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 5087e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner/// ActOnSwitchBodyError - This is called if there is an error parsing the 5097e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner/// body of the switch stmt instead of ActOnFinishSwitchStmt. 5107e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattnervoid Sema::ActOnSwitchBodyError(SourceLocation SwitchLoc, StmtArg Switch, 5117e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner StmtArg Body) { 5127e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner // Keep the switch stack balanced. 5137e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner assert(getSwitchStack().back() == (SwitchStmt*)Switch.get() && 5147e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner "switch stack missing push/pop!"); 5157e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner getSwitchStack().pop_back(); 5167e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner} 5177e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner 518de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 519de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, StmtArg Switch, 520de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg Body) { 521e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Stmt *BodyStmt = Body.takeAs<Stmt>(); 522de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 523bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner SwitchStmt *SS = getSwitchStack().back(); 524de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl assert(SS == (SwitchStmt*)Switch.get() && "switch stack missing push/pop!"); 525de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 5269dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 5271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump getSwitchStack().pop_back(); 528c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 529be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor if (SS->getCond() == 0) { 530be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor SS->Destroy(Context); 531be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor return StmtError(); 532be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor } 533be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor 534f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 53584fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor QualType CondTypeBeforePromotion = 53684fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor GetTypeBeforeIntegralPromotion(CondExpr); 537de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 5380de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor if (getLangOptions().CPlusPlus && 539a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor CheckCXXSwitchCondition(*this, SwitchLoc, CondExpr)) 5400de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor return StmtError(); 541a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor 5420de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 5430de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor UsualUnaryConversions(CondExpr); 544a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor QualType CondType = CondExpr->getType(); 54584fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor SS->setCond(CondExpr); 54684fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor 5475f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // C++ 6.4.2.p2: 5485f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // Integral promotions are performed (on the switch condition). 5495f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // 5505f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // A case value unrepresentable by the original switch condition 5515f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // type (before the promotion) doesn't make sense, even when it can 5525f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // be represented by the promoted type. Therefore we need to find 5535f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // the pre-promotion type of the switch condition. 55412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondExpr->isTypeDependent()) { 55512356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondType->isIntegerType()) { // C99 6.8.4.2p1 55612356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::err_typecheck_statement_requires_integer) 55712356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondType << CondExpr->getSourceRange(); 55812356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan return StmtError(); 55912356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 56012356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan 56112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (CondTypeBeforePromotion->isBooleanType()) { 56212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(bool_expr) {...} is often a programmer error, e.g. 56312356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(n && mask) { ... } // Doh - should be "n & mask". 56412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // One can always use an if statement instead of switch(bool_expr). 56512356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::warn_bool_switch_condition) 56612356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondExpr->getSourceRange(); 56712356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 568c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 569de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 570f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 571f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 5721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HasDependentValue 573dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 5741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned CondWidth 575dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = HasDependentValue? 0 5765f04881eb025f61396d0555d8173730fe2759e0aChris Lattner : static_cast<unsigned>(Context.getTypeSize(CondTypeBeforePromotion)); 5775f04881eb025f61396d0555d8173730fe2759e0aChris Lattner bool CondIsSigned = CondTypeBeforePromotion->isSignedIntegerType(); 5781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 579f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 580f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 581f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 5820471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner typedef llvm::SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 5830471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 5841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 585f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 586ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRangesTy; 587ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy CaseRanges; 5881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 589f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 5901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 591b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 5921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 593dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 594c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 5951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 596c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 597f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 598f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 5995f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 600de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 601f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 602390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 603390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 604390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 605b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 606c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 607f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 6081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 609f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 610f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 6111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 612f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 613f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 6141e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 615dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 616dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 617dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 618dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 619dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 62151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 6221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 623f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 624f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 625f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CS->getLHS()->getLocStart(), 626f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 6276c36be5b383875b490684bcf439d6d427298c1afChris Lattner 6281e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 6291e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 63073c39abdbb79927605d740c93dd9629e3e4f9bfeEli Friedman ImpCastExprToType(Lo, CondType, CastExpr::CK_IntegralCast); 6311e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 633b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 634dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 6351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CS->getRHS()->isTypeDependent() || 636dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 637dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 638dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 639dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 640f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 642b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 643f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 644f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 645b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 646dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 647dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 648dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 649dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 650dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 651dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseVals.size()-1; i != e; ++i) { 652dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CaseVals[i].first == CaseVals[i+1].first) { 653dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 654dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CaseVals[i+1].second->getLHS()->getLocStart(), 655dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::err_duplicate_case) << CaseVals[i].first.toString(10); 6561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(CaseVals[i].second->getLHS()->getLocStart(), 657dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 658390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 659390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 660dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 661dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6626efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 663b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 6641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 665dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 666dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 667dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 668dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 669dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 670dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 6711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 672dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 673dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 674dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 675dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 676dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 677dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 6781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 679dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 680dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 681dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->getRHS()->getLocStart(), 682dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 6831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 684dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the LHS is not the same type as the condition, insert an implicit 685dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // cast. 68673c39abdbb79927605d740c93dd9629e3e4f9bfeEli Friedman ImpCastExprToType(Hi, CondType, CastExpr::CK_IntegralCast); 687dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 6881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 689dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 690dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CaseRanges[i].first > HiVal) { 691dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 692dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 693dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->getRHS()->getLocEnd()); 694dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 695dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 696dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 697dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 698dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 6990471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 7001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 701dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 702dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 703dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 704dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 705dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 706dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 707dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 7081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 709dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 710dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 711dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 712dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 7131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 714dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 715dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 716dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 717dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 718dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 719dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 720dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 721dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 722dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 724dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 725dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 726dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 727dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 728dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 729dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 731dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 732dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 733dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 734dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 735dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 736dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 738dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 739dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 740dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 741dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 7421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(OverlapStmt->getLHS()->getLocStart(), 743dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 744390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 745390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 746dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 747dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7480471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 749b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 750ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 751ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // Check to see if switch is over an Enum and handles all of its 752ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // values 75330ab37122300a5f6664b8ae2d0b43b4396eb6bcbDouglas Gregor const EnumType* ET = CondTypeBeforePromotion->getAs<EnumType>(); 754ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // If switch has default case, then ignore it. 755ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (!CaseListIsErroneous && !TheDefaultStmt && ET) { 756ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor const EnumDecl *ED = ET->getDecl(); 757ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor typedef llvm::SmallVector<std::pair<llvm::APSInt, EnumConstantDecl*>, 64> EnumValsTy; 758ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy EnumVals; 759ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 760ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // Gather all enum values, set their type and sort them, allowing easier comparison 761ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // with CaseVals. 762ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (EnumDecl::enumerator_iterator EDI = ED->enumerator_begin(); EDI != ED->enumerator_end(); EDI++) { 763ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt Val = (*EDI)->getInitVal(); 764ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if(Val.getBitWidth() < CondWidth) 765ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor Val.extend(CondWidth); 766ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor Val.setIsSigned(CondIsSigned); 767ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumVals.push_back(std::make_pair(Val, (*EDI))); 768ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 769ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor std::stable_sort(EnumVals.begin(), EnumVals.end(), CmpEnumVals); 770ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy::iterator EIend = std::unique(EnumVals.begin(), EnumVals.end(), EqEnumVals); 771ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // See which case values aren't in enum 772ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EnumValsTy::const_iterator EI = EnumVals.begin(); 773ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (CaseValsTy::const_iterator CI = CaseVals.begin(); CI != CaseVals.end(); CI++) { 774ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (EI != EIend && EI->first < CI->first) 775ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EI++; 776ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI == EIend || EI->first > CI->first) 777ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor Diag(CI->second->getLHS()->getExprLoc(), diag::not_in_enum) << ED->getDeclName(); 778ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 779ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor // See which of case ranges aren't in enum 780ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EI = EnumVals.begin(); 781ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (CaseRangesTy::const_iterator RI = CaseRanges.begin(); RI != CaseRanges.end() && EI != EIend; RI++) { 782ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (EI != EIend && EI->first < RI->first) 783ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EI++; 784ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 785ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI == EIend || EI->first != RI->first) { 786ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor Diag(RI->second->getLHS()->getExprLoc(), diag::not_in_enum) << ED->getDeclName(); 787ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 788ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 789ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 790ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (EI != EIend && EI->first < Hi) 791ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EI++; 792ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI == EIend || EI->first != Hi) 793ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor Diag(RI->second->getRHS()->getExprLoc(), diag::not_in_enum) << ED->getDeclName(); 794ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 795ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor //Check which enum vals aren't in switch 796ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseValsTy::const_iterator CI = CaseVals.begin(); 797ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CaseRangesTy::const_iterator RI = CaseRanges.begin(); 798ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor EI = EnumVals.begin(); 799ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (; EI != EIend; EI++) { 800ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor //Drop unneeded case values 801ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt CIVal; 802ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor while (CI != CaseVals.end() && CI->first < EI->first) 803ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor CI++; 804ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 805ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (CI != CaseVals.end() && CI->first == EI->first) 806ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor continue; 807ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 808ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor //Drop unneeded case ranges 809ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor for (; RI != CaseRanges.end(); RI++) { 810ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor llvm::APSInt Hi = RI->second->getRHS()->EvaluateAsInt(Context); 811ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (EI->first <= Hi) 812ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor break; 813ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 814ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor 815ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor if (RI == CaseRanges.end() || EI->first < RI->first) 816ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor Diag(CondExpr->getExprLoc(), diag::warn_missing_cases) << EI->second->getDeclName(); 817ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 818ba915af51ced751c46e7c2b9c6f3b59d2e668825Douglas Gregor } 819b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 820dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 821390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 822390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 823b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 824de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 825de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 826de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Switch.release(); 827de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 8285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 830f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 83199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas GregorSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, 83299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor DeclPtrTy CondVar, StmtArg Body) { 83399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor OwningExprResult CondResult(Cond.release()); 83499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 8355656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor VarDecl *ConditionVar = 0; 83699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondVar.get()) { 83799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor ConditionVar = CondVar.getAs<VarDecl>(); 83899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult = CheckConditionVariable(ConditionVar); 83999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 84099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 8415656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor } 84299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 84399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 84499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 84599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 84699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CheckBooleanCondition(ConditionExpr, WhileLoc)) { 84799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult = ConditionExpr; 8485a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 8494a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor } 8505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 851754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson Stmt *bodyStmt = Body.takeAs<Stmt>(); 852754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(bodyStmt); 8531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 85499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult.release(); 85599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return Owned(new (Context) WhileStmt(ConditionVar, ConditionExpr, bodyStmt, 8565656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor WhileLoc)); 8575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 859f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 860f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnDoStmt(SourceLocation DoLoc, StmtArg Body, 861989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 862989135901c750af61ef012b6b0a0368be415bc46Chris Lattner ExprArg Cond, SourceLocation CondRParen) { 863e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Expr *condExpr = Cond.takeAs<Expr>(); 8641b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnDoStmt(): missing expression"); 865f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 8665a881bb09928b7ade891efc680088aaad276f8d6John McCall if (CheckBooleanCondition(condExpr, DoLoc)) { 8679f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor Cond = condExpr; 8685a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 8699f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor } 8705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 871754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson Stmt *bodyStmt = Body.takeAs<Stmt>(); 872754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(bodyStmt); 873754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 874f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond.release(); 875754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson return Owned(new (Context) DoStmt(bodyStmt, condExpr, DoLoc, 876989135901c750af61ef012b6b0a0368be415bc46Chris Lattner WhileLoc, CondRParen)); 8775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 879f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 880f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 88199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor StmtArg first, FullExprArg second, DeclPtrTy secondVar, 88299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor FullExprArg third, 883f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation RParenLoc, StmtArg body) { 884f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *First = static_cast<Stmt*>(first.get()); 885f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 8865921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 8875921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 888f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 889f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 890f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 8915921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 8925921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 8935921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 8945921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD && VD->isBlockVarDecl() && !VD->hasLocalStorage()) 8955921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 8965921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 8975921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 8985921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 8995921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 900ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 9015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 90299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 90399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor OwningExprResult SecondResult(second.release()); 90499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor VarDecl *ConditionVar = 0; 90599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (secondVar.get()) { 90699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor ConditionVar = secondVar.getAs<VarDecl>(); 90799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor SecondResult = CheckConditionVariable(ConditionVar); 90899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (SecondResult.isInvalid()) 90999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 91099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor } 91199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 91299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Second = SecondResult.takeAs<Expr>(); 9135a881bb09928b7ade891efc680088aaad276f8d6John McCall if (Second && CheckBooleanCondition(Second, ForLoc)) { 91499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor SecondResult = Second; 9155a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 9165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 91899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Third = third.release().takeAs<Expr>(); 91999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Stmt *Body = static_cast<Stmt*>(body.get()); 92099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 9213af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(First); 9223af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(Third); 923754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(Body); 924754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 925f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl first.release(); 926f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl body.release(); 92799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return Owned(new (Context) ForStmt(First, Second, ConditionVar, Third, Body, 92899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor ForLoc, LParenLoc, RParenLoc)); 9295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 931f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 932f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 933f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 934f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl StmtArg first, ExprArg second, 935f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation RParenLoc, StmtArg body) { 936f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *First = static_cast<Stmt*>(first.get()); 937f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Second = static_cast<Expr*>(second.get()); 938f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *Body = static_cast<Stmt*>(body.get()); 93920552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 94020552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 94120552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 9427e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 943f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 944f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 945f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 9467e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner Decl *D = DS->getSingleDecl(); 947f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek FirstType = cast<ValueDecl>(D)->getType(); 948f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 949f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 950f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 951248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff VarDecl *VD = cast<VarDecl>(D); 952248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff if (VD->isBlockVarDecl() && !VD->hasLocalStorage()) 953f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(VD->getLocation(), 954f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 9551fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 956810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (cast<Expr>(First)->isLvalue(Context) != Expr::LV_Valid) 957f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 958f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 959f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 9601fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 9611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FirstType = static_cast<Expr*>(First)->getType(); 9621fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 9631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!FirstType->isObjCObjectPointerType() && 964a5e42a82ce055f29f3733f3a1f10da6cb9877deeFariborz Jahanian !FirstType->isBlockPointerType()) 965dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 966d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 9673ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 9683ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian if (Second) { 969a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(Second); 9703ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian QualType SecondType = Second->getType(); 971f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!SecondType->isObjCObjectPointerType()) 972dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_collection_expr_type) 973d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 9743ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 975f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl first.release(); 976f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl second.release(); 977f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl body.release(); 9788189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 9798189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 9803ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 9815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9824cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 9831b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnGotoStmt(SourceLocation GotoLoc, SourceLocation LabelLoc, 9845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *LabelII) { 9855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 986ea29a3a0d6948c4a51a261d19ec1a585d2a9c779Chris Lattner LabelStmt *&LabelDecl = getLabelMap()[LabelII]; 9875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 988caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff // If we haven't seen this label yet, create a forward reference. 989caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff if (LabelDecl == 0) 9908189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek LabelDecl = new (Context) LabelStmt(LabelLoc, LabelII, 0); 9914cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 9928189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) GotoStmt(LabelDecl, GotoLoc, LabelLoc)); 9935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9954cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 996ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 9974cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl ExprArg DestExp) { 998bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 99933083823342649b1fccec856c1f239c09fc0d7e1Eli Friedman Expr* E = DestExp.takeAs<Expr>(); 10005f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 10015f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 10022877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth QualType DestTy = Context.getPointerType(Context.VoidTy.withConst()); 10035f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 10042877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth CheckSingleAssignmentConstraints(DestTy, E); 10052877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth if (DiagnoseAssignmentResult(ConvTy, StarLoc, DestTy, ETy, E, AA_Passing)) 10065f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 10075f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 10085f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 10095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10114cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 10121b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 10135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 10145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 10155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 10164cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 10175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10184cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10198189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 10205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10224cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 10231b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 10245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 10255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 10265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 10274cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 10285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10294cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10308189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 10315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 103327c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 10344eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 10354cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 10364eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 10374eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 10384eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 10397d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CurBlock->ReturnType.isNull()) { 1040c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 104116564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 104216564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 1043a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(RetValExp); 10447d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = RetValExp->getType(); 10457d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(RetValExp)) { 10467d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // We have to remove a 'const' added to copied-in variable which was 10477d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // part of the implementation spec. and not the actual qualifier for 10487d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // the variable. 10497d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CDRE->isConstQualAdded()) 10507d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType.removeConst(); 10517d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian } 1052c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 10537d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = Context.VoidTy; 10544eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 10557d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian QualType FnRetType = CurBlock->ReturnType; 10564cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 105740b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (CurBlock->TheDecl->hasAttr<NoReturnAttr>()) { 10586c92fa75e62937f9738696840efcb258560f4568Mike Stump Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr) 10596c92fa75e62937f9738696840efcb258560f4568Mike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 10606c92fa75e62937f9738696840efcb258560f4568Mike Stump return StmtError(); 10616c92fa75e62937f9738696840efcb258560f4568Mike Stump } 10626c92fa75e62937f9738696840efcb258560f4568Mike Stump 10634eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 10644eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 10654eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 10664eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 10674eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) { 10684eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 10698189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek RetValExp->Destroy(Context); 10704eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 10714eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 10728189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 10734eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 10744cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10754cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl if (!RetValExp) 10764cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 10774cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 107898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 107998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // we have a non-void block with an expression, continue checking 108098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 10811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // C99 6.8.6.4p3(136): The return statement is not an assignment. The 10821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // overlap restriction of subclause 6.5.16.1 does not apply to the case of 108398eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // function return. 10844cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 108598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // In C++ the return statement is handled via a copy initialization. 108698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // the C version of which boils down to CheckSingleAssignmentConstraints. 1087c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson OwningExprResult Res = PerformCopyInitialization( 1088c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson InitializedEntity::InitializeResult(ReturnLoc, 1089c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson FnRetType), 1090c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson SourceLocation(), 1091c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson Owned(RetValExp)); 1092c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson if (Res.isInvalid()) { 1093c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson // FIXME: Cleanup temporaries here, anyway? 109498eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump return StmtError(); 1095c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson } 1096c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson 1097c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson RetValExp = Res.takeAs<Expr>(); 1098c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson if (RetValExp) 1099c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 110098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 11014cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 11028189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 11034eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 11045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1105e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl/// IsReturnCopyElidable - Whether returning @p RetExpr from a function that 1106e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl/// returns a @p RetType fulfills the criteria for copy elision (C++0x 12.8p15). 1107e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redlstatic bool IsReturnCopyElidable(ASTContext &Ctx, QualType RetType, 1108e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl Expr *RetExpr) { 1109e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl QualType ExprType = RetExpr->getType(); 1110e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // - in a return statement in a function with ... 1111e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // ... a class return type ... 1112e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (!RetType->isRecordType()) 1113e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 1114e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // ... the same cv-unqualified type as the function return type ... 1115a4923eb7c4b04d360cb2747641a5e92818edf804Douglas Gregor if (!Ctx.hasSameUnqualifiedType(RetType, ExprType)) 1116e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 1117e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // ... the expression is the name of a non-volatile automatic object ... 1118e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // We ignore parentheses here. 1119e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // FIXME: Is this compliant? 1120e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(RetExpr->IgnoreParens()); 1121e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (!DR) 1122e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 1123e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 1124e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (!VD) 1125e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 1126e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return VD->hasLocalStorage() && !VD->getType()->isReferenceType() 1127e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl && !VD->getType().isVolatileQualified(); 1128e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl} 1129e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl 11304cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 1131f53b4433abb7a3bc14c0329d3175cbc291280137Anders CarlssonSema::ActOnReturnStmt(SourceLocation ReturnLoc, ExprArg rex) { 1132f53b4433abb7a3bc14c0329d3175cbc291280137Anders Carlsson Expr *RetValExp = rex.takeAs<Expr>(); 11334eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock) 11344eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 11354cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1136371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 1137f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 1138371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 113904a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall if (FD->hasAttr<NoReturnAttr>() || 114004a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall FD->getType()->getAs<FunctionType>()->getNoReturnAttr()) 11418662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 1142f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 1143f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump } else if (ObjCMethodDecl *MD = getCurMethodDecl()) 1144c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff FnRetType = MD->getResultType(); 1145c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff else // If we don't have a function/method context, bail. 1146c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 11471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11485cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 11491be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor if (RetValExp && !RetValExp->isTypeDependent()) { 11501be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor // C99 6.8.6.4p1 (ext_ since GCC warns) 115165ce04bef06696379682410f399f37b43996d824Chris Lattner unsigned D = diag::ext_return_has_expr; 115265ce04bef06696379682410f399f37b43996d824Chris Lattner if (RetValExp->getType()->isVoidType()) 115365ce04bef06696379682410f399f37b43996d824Chris Lattner D = diag::ext_return_has_void_expr; 11544cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1155e878eb035b343d7d819c092102364ec9849716aeChris Lattner // return (some void expression); is legal in C++. 1156e878eb035b343d7d819c092102364ec9849716aeChris Lattner if (D != diag::ext_return_has_void_expr || 1157e878eb035b343d7d819c092102364ec9849716aeChris Lattner !getLangOptions().CPlusPlus) { 1158e878eb035b343d7d819c092102364ec9849716aeChris Lattner NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 1159e878eb035b343d7d819c092102364ec9849716aeChris Lattner Diag(ReturnLoc, D) 1160e878eb035b343d7d819c092102364ec9849716aeChris Lattner << CurDecl->getDeclName() << isa<ObjCMethodDecl>(CurDecl) 1161e878eb035b343d7d819c092102364ec9849716aeChris Lattner << RetValExp->getSourceRange(); 1162e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 11631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11640ece491d8f62ce67f047491a6703fac0d3bd4ff4Anders Carlsson RetValExp = MaybeCreateCXXExprWithTemporaries(RetValExp); 11655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 11668189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 11675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 11684cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 116903d77760a5db7990724b6901cea958a673ce0b39Anders Carlsson if (!RetValExp && !FnRetType->isDependentType()) { 11703c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 11713c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 11723c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 11733c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 11743c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 117508631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 11763c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 117708631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 11788189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, (Expr*)0)); 11793c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner } 11804cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1181898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 1182898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // we have a non-void function with an expression, continue checking 11834cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 11841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // C99 6.8.6.4p3(136): The return statement is not an assignment. The 11851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // overlap restriction of subclause 6.5.16.1 does not apply to the case of 11864cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // function return. 11874cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1188e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // C++0x 12.8p15: When certain criteria are met, an implementation is 1189e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // allowed to omit the copy construction of a class object, [...] 1190e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // - in a return statement in a function with a class return type, when 1191e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // the expression is the name of a non-volatile automatic object with 1192e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // the same cv-unqualified type as the function return type, the copy 1193e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // operation can be omitted [...] 1194e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // C++0x 12.8p16: When the criteria for elision of a copy operation are met 1195e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // and the object to be copied is designated by an lvalue, overload 1196e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // resolution to select the constructor for the copy is first performed 1197e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // as if the object were designated by an rvalue. 1198e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // Note that we only compute Elidable if we're in C++0x, since we don't 1199e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // care otherwise. 1200e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl bool Elidable = getLangOptions().CPlusPlus0x ? 1201e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl IsReturnCopyElidable(Context, FnRetType, RetValExp) : 1202e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl false; 120318ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor // FIXME: Elidable 120418ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor (void)Elidable; 120518ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor 1206898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // In C++ the return statement is handled via a copy initialization. 12074cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // the C version of which boils down to CheckSingleAssignmentConstraints. 1208bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor OwningExprResult Res = PerformCopyInitialization( 1209bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor InitializedEntity::InitializeResult(ReturnLoc, 1210d6542d8efcf8389c3aab764f9e29ac284e16eda6Douglas Gregor FnRetType), 1211bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor SourceLocation(), 1212bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor Owned(RetValExp)); 1213bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor if (Res.isInvalid()) { 121418ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor // FIXME: Cleanup temporaries here, anyway? 12154cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(); 121666724ea67d7d598b937d86fa66f03f09a1c758f3Douglas Gregor } 121718ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor 1218bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor RetValExp = Res.takeAs<Expr>(); 121918ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor if (RetValExp) 122018ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 1221898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 1222898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 1223f53b4433abb7a3bc14c0329d3175cbc291280137Anders Carlsson if (RetValExp) 12240ece491d8f62ce67f047491a6703fac0d3bd4ff4Anders Carlsson RetValExp = MaybeCreateCXXExprWithTemporaries(RetValExp); 12258189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 12265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 12275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1228810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 1229810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 1230810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 1231810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 1232810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 1233810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 1234810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 1235810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 1236703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson // Type dependent expressions will be checked during instantiation. 1237703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson if (E->isTypeDependent()) 1238703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson return false; 1239703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson 1240810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (E->isLvalue(S.Context) == Expr::LV_Valid) 1241810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 1242810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1243810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 1244810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 1245810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 1246810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (E != E2 && E2->isLvalue(S.Context) == Expr::LV_Valid) { 1247810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (!S.getLangOptions().HeinousExtensions) 1248810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 1249810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1250810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 1251810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 1252810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1253810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 1254810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 1255810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 1256810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1257810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 1258810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 1259810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 1260810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1261810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 12623037ed0a27dba62e522304183718efc149e8b6d9Sebastian RedlSema::OwningStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, 12633037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsSimple, 12643037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsVolatile, 12653037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumOutputs, 12663037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumInputs, 1267ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson IdentifierInfo **Names, 12683037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg constraints, 12693037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg exprs, 12703037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl ExprArg asmString, 12713037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg clobbers, 12723b11fd3b52e7b88233c602407c151d07cb093e75Mike Stump SourceLocation RParenLoc, 12733b11fd3b52e7b88233c602407c151d07cb093e75Mike Stump bool MSAsm) { 12743037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 12753037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 12763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 12773037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl Expr **Exprs = reinterpret_cast<Expr **>(exprs.get()); 12783037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral *AsmString = cast<StringLiteral>((Expr *)asmString.get()); 12793037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 12803037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 128103eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson llvm::SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 12821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12831708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 12846bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (AsmString->isWide()) 12853037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 12863037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 12873037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 12881708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 12891708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 12906bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 12913037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 12923037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 12933037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1294ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef OutputName; 1295ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1296ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson OutputName = Names[i]->getName(); 1297ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1298ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 1299432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner if (!Context.Target.validateOutputConstraint(Info)) 13003037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1301432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 1302432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 13033037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1304d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 130572056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 1306810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 130772056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 1308dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 130972056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 131004728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 13111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 131244def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 131304728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 13143037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1315806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner llvm::SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 1316806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 131704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 13181708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 13196bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 13203037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 13213037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 13223037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1323ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef InputName; 1324ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1325ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson InputName = Names[i]->getName(); 1326ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1327ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 1328beaaccd8e2a8748f77b66e2b330fb9136937e14cJay Foad if (!Context.Target.validateInputConstraint(OutputConstraintInfos.data(), 13292819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 13303037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1331432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 1332432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 1333d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 13343037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 133572056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 13363037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1337d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 133844def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 1339810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 134072056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1341d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 1342432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 134372056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 134404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 13453037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 134644def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 1347d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 134872056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1349d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 13501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump << InputExpr->getType() << Info.getConstraintStr() 135172056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 1352d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 1353d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 13541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1355a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(Exprs[i]); 13561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1357806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 135804728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 13593037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 13606fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 13611708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 13621708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 13636bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 13643037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 13653037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 13663037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1367fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson llvm::StringRef Clobber = Literal->getString(); 13683037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1369fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson if (!Context.Target.isValidGCCRegisterName(Clobber)) 13703037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 13717765934ad7e157b5fcf925792a38e01b1edbcf8aDaniel Dunbar diag::err_asm_unknown_register_name) << Clobber); 13726fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 13733037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 13743037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl constraints.release(); 13753037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl exprs.release(); 13763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl asmString.release(); 13773037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl clobbers.release(); 1378fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 1379966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm, 1380966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson NumOutputs, NumInputs, Names, Constraints, Exprs, 1381966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson AsmString, NumClobbers, Clobbers, RParenLoc); 1382fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 1383fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 1384fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner llvm::SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 1385fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 1386fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 13872ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 13882ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 1389fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner DeleteStmt(NS); 1390fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 1391fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 13921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1393806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 1394806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 1395806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 13961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1397806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 1398806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 1399806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 1400806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 14011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1402806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 1403f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 1404c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Expr *InputExpr = Exprs[i+NumOutputs]; 14057adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 14067adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 14077adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 1408806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 14091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14107adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // Int/ptr operands have some special cases that we allow. 14117adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if ((OutTy->isIntegerType() || OutTy->isPointerType()) && 14127adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner (InTy->isIntegerType() || InTy->isPointerType())) { 14131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14147adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // They are ok if they are the same size. Tying void* to int is ok if 14157adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // they are the same size, for example. This also allows tying void* to 14167adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // int*. 14173351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 14183351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 14193351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (OutSize == InSize) 1420806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; 14211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14223351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 14233351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // then we can promote it and the asm string won't notice. Check this 1424f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner // case now. 14253351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner bool SmallerValueMentioned = false; 142658bce89d12b1dfba16637ce3754d6cb24c3099bbChris Lattner for (unsigned p = 0, e = Pieces.size(); p != e; ++p) { 142758bce89d12b1dfba16637ce3754d6cb24c3099bbChris Lattner AsmStmt::AsmStringPiece &Piece = Pieces[p]; 142858bce89d12b1dfba16637ce3754d6cb24c3099bbChris Lattner if (!Piece.isOperand()) continue; 14291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14303351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If this is a reference to the input and if the input was the smaller 14313351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // one, then we have to reject this asm. 14323351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (Piece.getOperandNo() == i+NumOutputs) { 14333351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (InSize < OutSize) { 14343351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner SmallerValueMentioned = true; 14353351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner break; 14363351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 14373351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 14383351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 14393351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If this is a reference to the input and if the input was the smaller 14403351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // one, then we have to reject this asm. 14413351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (Piece.getOperandNo() == TiedTo) { 14423351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (InSize > OutSize) { 14433351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner SmallerValueMentioned = true; 14443351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner break; 14453351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 14463351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 1447f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner } 14481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14493351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 14503351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // output was a register, just extend the shorter one to the size of the 14513351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // larger one. 14523351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (!SmallerValueMentioned && 1453f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 1454f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner continue; 1455806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 14561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1457c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 1458806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 14597adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 1460806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 1461806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner DeleteStmt(NS); 1462806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 1463806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 14641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1465fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 1466fe795956194141c91ae555985c9b930595bff43fChris Lattner} 14673b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 1468431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1469431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 1470b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner SourceLocation RParen, DeclPtrTy Parm, 1471431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg Body, StmtArg catchList) { 1472f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *CatchList = catchList.takeAs<Stmt>(); 1473b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner ParmVarDecl *PVD = cast_or_null<ParmVarDecl>(Parm.getAs<Decl>()); 14741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1475f50cb369273c6bd26c9629df92ee53f1d8af4149Steve Naroff // PVD == 0 implies @catch(...). 14769d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff if (PVD) { 147793c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner // If we already know the decl is invalid, reject it. 147893c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner if (PVD->isInvalidDecl()) 147993c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner return StmtError(); 14801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1481f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!PVD->getType()->isObjCObjectPointerType()) 14821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return StmtError(Diag(PVD->getLocation(), 14839d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff diag::err_catch_param_not_objc_type)); 14849d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff if (PVD->getType()->isObjCQualifiedIdType()) 14851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return StmtError(Diag(PVD->getLocation(), 1486d198abae5938262e501a409e833bf01ca8b8253eSteve Naroff diag::err_illegal_qualifiers_on_catch_parm)); 14879d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff } 148893c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner 14898189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ObjCAtCatchStmt *CS = new (Context) ObjCAtCatchStmt(AtLoc, RParen, 1490e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson PVD, Body.takeAs<Stmt>(), CatchList); 1491431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl return Owned(CatchList ? CatchList : CS); 14923b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 14933b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 1494431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1495431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, StmtArg Body) { 14968189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, 14978189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(Body.release()))); 1498161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 1499bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1500431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1501431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, 1502431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg Try, StmtArg Catch, StmtArg Finally) { 150338c5ebd7b1b65304c7b5c7b9bf3f9162df22e77dChris Lattner CurFunctionNeedsScopeChecking = true; 1504e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson return Owned(new (Context) ObjCAtTryStmt(AtLoc, Try.takeAs<Stmt>(), 1505e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Catch.takeAs<Stmt>(), 1506e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Finally.takeAs<Stmt>())); 1507bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 1508bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1509431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 15103dcfe10a6801eb52f4c20f1242bea0a3a98aa146Steve NaroffSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, ExprArg expr,Scope *CurScope) { 1511f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Expr *ThrowExpr = expr.takeAs<Expr>(); 15127151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!ThrowExpr) { 1513e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 1514e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 1515e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 1516e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 1517e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 1518e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 15194ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 15207151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } else { 15217151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff QualType ThrowType = ThrowExpr->getType(); 15227151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff // Make sure the expression type is an ObjC pointer or "void *". 1523f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!ThrowType->isObjCObjectPointerType()) { 15246217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const PointerType *PT = ThrowType->getAs<PointerType>(); 15257151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!PT || !PT->getPointeeType()->isVoidType()) 15264ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 15274ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff << ThrowExpr->getType() << ThrowExpr->getSourceRange()); 15287151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } 15297151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } 15307151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff return Owned(new (Context) ObjCAtThrowStmt(AtLoc, ThrowExpr)); 153139f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 1532bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1533431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1534431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, ExprArg SynchExpr, 1535431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg SynchBody) { 153646c3c4ba78766ac0f1c5ec631b424773e21f5271Chris Lattner CurFunctionNeedsScopeChecking = true; 153746c3c4ba78766ac0f1c5ec631b424773e21f5271Chris Lattner 1538a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 1539a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner Expr *SyncExpr = static_cast<Expr*>(SynchExpr.get()); 1540f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!SyncExpr->getType()->isObjCObjectPointerType()) { 15416217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const PointerType *PT = SyncExpr->getType()->getAs<PointerType>(); 1542a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner if (!PT || !PT->getPointeeType()->isVoidType()) 1543a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner return StmtError(Diag(AtLoc, diag::error_objc_synchronized_expects_object) 1544a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner << SyncExpr->getType() << SyncExpr->getSourceRange()); 1545a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 15461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, 1548e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson SynchExpr.takeAs<Stmt>(), 1549e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson SynchBody.takeAs<Stmt>())); 1550fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 15514b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 15524b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 15534b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 15544b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian RedlAction::OwningStmtResult 1555b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris LattnerSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, DeclPtrTy ExDecl, 15564b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl StmtArg HandlerBlock) { 15574b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 15588189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 1559b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner cast_or_null<VarDecl>(ExDecl.getAs<Decl>()), 1560e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson HandlerBlock.takeAs<Stmt>())); 15614b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 15628351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 1563c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlclass TypeWithHandler { 1564c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType t; 1565c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *stmt; 1566c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlpublic: 1567c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler(const QualType &type, CXXCatchStmt *statement) 1568c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl : t(type), stmt(statement) {} 1569c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 15700953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // An arbitrary order is fine as long as it places identical 15710953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // types next to each other. 1572c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator<(const TypeWithHandler &y) const { 15730953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() < y.t.getAsOpaquePtr()) 1574c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return true; 15750953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() > y.t.getAsOpaquePtr()) 1576c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return false; 1577c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl else 1578c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return getTypeSpecStartLoc() < y.getTypeSpecStartLoc(); 1579c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 15801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1581c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator==(const TypeWithHandler& other) const { 15820953e767ff7817f97b3ab20896b229891eeff45bJohn McCall return t == other.t; 1583c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 15841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1585c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType getQualType() const { return t; } 1586c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *getCatchStmt() const { return stmt; } 1587c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl SourceLocation getTypeSpecStartLoc() const { 1588c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return stmt->getExceptionDecl()->getTypeSpecStartLoc(); 1589c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 1590c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl}; 1591c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 15928351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 15938351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 15948351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlAction::OwningStmtResult 15958351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlSema::ActOnCXXTryBlock(SourceLocation TryLoc, StmtArg TryBlock, 15968351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 15978351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 15988351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 15998351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 16008351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl Stmt **Handlers = reinterpret_cast<Stmt**>(RawHandlers.get()); 16018351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 1602c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::SmallVector<TypeWithHandler, 8> TypesWithHandlers; 16031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (unsigned i = 0; i < NumHandlers; ++i) { 16058351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl CXXCatchStmt *Handler = llvm::cast<CXXCatchStmt>(Handlers[i]); 1606c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (!Handler->getExceptionDecl()) { 1607c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (i < NumHandlers - 1) 1608c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return StmtError(Diag(Handler->getLocStart(), 1609c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::err_early_catch_all)); 16101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1611c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl continue; 1612c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 16131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1614c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CaughtType = Handler->getCaughtType(); 1615c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CanonicalCaughtType = Context.getCanonicalType(CaughtType); 1616c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypesWithHandlers.push_back(TypeWithHandler(CanonicalCaughtType, Handler)); 1617c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 1618c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 1619c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl // Detect handlers for the same type as an earlier one. 1620c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (NumHandlers > 1) { 1621c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::array_pod_sort(TypesWithHandlers.begin(), TypesWithHandlers.end()); 16221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1623c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler prev = TypesWithHandlers[0]; 1624c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl for (unsigned i = 1; i < TypesWithHandlers.size(); ++i) { 1625c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler curr = TypesWithHandlers[i]; 16261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1627c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (curr == prev) { 1628c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(curr.getTypeSpecStartLoc(), 1629c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::warn_exception_caught_by_earlier_handler) 1630c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << curr.getCatchStmt()->getCaughtType().getAsString(); 1631c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(prev.getTypeSpecStartLoc(), 1632c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::note_previous_exception_handler) 1633c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << prev.getCatchStmt()->getCaughtType().getAsString(); 1634c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 16351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1636c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl prev = curr; 1637c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 16388351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 16391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16408351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 16418351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 16428351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 16438351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 16448351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 16458351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 1646972041f45bdf8df7ea447221292d7827466ba94bSebastian Redl CurFunctionNeedsScopeChecking = true; 16478351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl RawHandlers.release(); 1648a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig return Owned(CXXTryStmt::Create(Context, TryLoc, 1649a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig static_cast<Stmt*>(TryBlock.release()), 1650a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig Handlers, NumHandlers)); 16518351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 1652