SemaStmt.cpp revision a1a396df16c02b22983b5c9592022fd9237d4866
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 96bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (const CallExpr *CE = dyn_cast<CallExpr>(E)) { 97bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // If the callee has attribute pure, const, or warn_unused_result, warn with 98bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner // a more specific message to make it clear what is happening. 99d20254f2875d0004c57ee766f258dbcee29f4841Nuno Lopes if (const Decl *FD = CE->getCalleeDecl()) { 100bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<WarnUnusedResultAttr>()) { 101bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "warn_unused_result"; 102bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 103bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 104bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<PureAttr>()) { 105bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "pure"; 106bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 107bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 108bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner if (FD->getAttr<ConstAttr>()) { 109bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner Diag(Loc, diag::warn_unused_call) << R1 << R2 << "const"; 110bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner return; 111bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 112bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 113bc8d42c6f1565c0b2f93ad524edebfd7a4e6cac6Chris Lattner } 1141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 115419cfb318cd69b6c717019288d5a3822be18d8f9Chris Lattner Diag(Loc, DiagID) << R1 << R2; 116636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson} 117636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson 118a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian RedlAction::OwningStmtResult 1191b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 120a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 121a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 122a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 123c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 124c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 125c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus) { 126c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 127c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 128c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 129c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 130c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 131c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 132c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 133c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 134c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 1351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 136c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 1374afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 138c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 139c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 140c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 14198414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 14298414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 143636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson // Ignore statements that are last in a statement expression. 144636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson if (isStmtExpr && i == NumElts - 1) 14598414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 1461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 147636463e4c43be15e2f0fd0b8a08667f3066d8af7Anders Carlsson DiagnoseUnusedExprResult(Elts[i]); 14898414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 149a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 1508189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 153117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlAction::OwningStmtResult 154117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlSema::ActOnCaseStmt(SourceLocation CaseLoc, ExprArg lhsval, 155117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl SourceLocation DotDotDotLoc, ExprArg rhsval, 15624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 157117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl assert((lhsval.get() != 0) && "missing expression in case statement"); 158117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.4.2p3: The expression shall be an integer constant. 1601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // However, GCC allows any evaluatable integer expression. 161117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Expr *LHSVal = static_cast<Expr*>(lhsval.get()); 1621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!LHSVal->isTypeDependent() && !LHSVal->isValueDependent() && 163dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(LHSVal)) 16424e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1666c36be5b383875b490684bcf439d6d427298c1afChris Lattner // GCC extension: The expression shall be an integer constant. 167117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 168117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Expr *RHSVal = static_cast<Expr*>(rhsval.get()); 169dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (RHSVal && !RHSVal->isTypeDependent() && !RHSVal->isValueDependent() && 170dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(RHSVal)) { 171f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner RHSVal = 0; // Recover by just forgetting about it. 172117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl rhsval = 0; 173117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl } 174117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 175bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner if (getSwitchStack().empty()) { 1768a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner Diag(CaseLoc, diag::err_case_not_in_switch); 17724e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1788a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 180117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl // Only now release the smart pointers. 181117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl lhsval.release(); 182117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl rhsval.release(); 183dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc, DotDotDotLoc, 184dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ColonLoc); 185bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner getSwitchStack().back()->addSwitchCase(CS); 186117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 18924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 19024e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattnervoid Sema::ActOnCaseStmtBody(StmtTy *caseStmt, StmtArg subStmt) { 19124e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 192f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *SubStmt = subStmt.takeAs<Stmt>(); 19324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 19424e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 19524e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 196117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlAction::OwningStmtResult 1971eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 198117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl StmtArg subStmt, Scope *CurScope) { 199f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *SubStmt = subStmt.takeAs<Stmt>(); 200117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 201bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner if (getSwitchStack().empty()) { 2020fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 203117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 2040fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 205117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 206dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, ColonLoc, SubStmt); 207bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner getSwitchStack().back()->addSwitchCase(DS); 208117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 211de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 2121b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II, 213de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl SourceLocation ColonLoc, StmtArg subStmt) { 214f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *SubStmt = subStmt.takeAs<Stmt>(); 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 216ea29a3a0d6948c4a51a261d19ec1a585d2a9c779Chris Lattner LabelStmt *&LabelDecl = getLabelMap()[II]; 217de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If not forward referenced or defined already, just create a new LabelStmt. 219caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff if (LabelDecl == 0) 220caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff return Owned(LabelDecl = new (Context) LabelStmt(IdentLoc, II, SubStmt)); 221de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(LabelDecl->getID() == II && "Label mismatch!"); 223de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was either forward reference or multiply defined. If 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // multiply defined, reject it now. 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LabelDecl->getSubStmt()) { 22708631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << LabelDecl->getID(); 2285f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(LabelDecl->getIdentLoc(), diag::note_previous_definition); 229de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 231de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was forward declared, and we just found its real 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // definition. Fill in the forward definition and return it. 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelDecl->setIdentLoc(IdentLoc); 2350fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner LabelDecl->setSubStmt(SubStmt); 236de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(LabelDecl); 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 239de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 24099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas GregorSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, DeclPtrTy CondVar, 241de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg ThenVal, SourceLocation ElseLoc, 242de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg ElseVal) { 243a99fad8ff134273fe85f2970c7d89133d1218900Anders Carlsson OwningExprResult CondResult(CondVal.release()); 2441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2458cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor VarDecl *ConditionVar = 0; 24699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondVar.get()) { 24799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor ConditionVar = CondVar.getAs<VarDecl>(); 24899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult = CheckConditionVariable(ConditionVar); 24999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 25099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 2518cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor } 25299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 25399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 25499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 2558cfe5a784133d90bf329fd20801824a6f71bb8caDouglas Gregor 25699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CheckBooleanCondition(ConditionExpr, IfLoc)) { 25799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult = ConditionExpr; 2585a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 259d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor } 260de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 261e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Stmt *thenStmt = ThenVal.takeAs<Stmt>(); 262754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(thenStmt); 2635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2642d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 2652d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 2662d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 2672d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 2681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!ElseVal.get()) { 2692d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 2702d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 2712d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 2722d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 273754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson Stmt *elseStmt = ElseVal.takeAs<Stmt>(); 274754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(elseStmt); 2751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 276a99fad8ff134273fe85f2970c7d89133d1218900Anders Carlsson CondResult.release(); 27799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return Owned(new (Context) IfStmt(IfLoc, ConditionVar, ConditionExpr, 27899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor thenStmt, ElseLoc, elseStmt)); 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 281de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 28299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas GregorSema::ActOnStartOfSwitchStmt(FullExprArg cond, DeclPtrTy CondVar) { 28399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor OwningExprResult CondResult(cond.release()); 28499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 285d3d5301c44138b92bf01286183f5bf310cdd37cfDouglas Gregor VarDecl *ConditionVar = 0; 28699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondVar.get()) { 28799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor ConditionVar = CondVar.getAs<VarDecl>(); 28899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult = CheckConditionVariable(ConditionVar); 28999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 29099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 291d3d5301c44138b92bf01286183f5bf310cdd37cfDouglas Gregor } 292be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor SwitchStmt *SS = new (Context) SwitchStmt(ConditionVar, 293be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor CondResult.takeAs<Expr>()); 294bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner getSwitchStack().push_back(SS); 295de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 296c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson} 2976c36be5b383875b490684bcf439d6d427298c1afChris Lattner 298f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 299f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 300f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 301f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 302f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 3031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, 304f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 305f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 306f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 307f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 308f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 309f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.extend(NewWidth); 3101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 311f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If the input was signed and negative and the output is unsigned, 312f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // warn. 313f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (!NewSign && OldVal.isSigned() && OldVal.isNegative()) 314d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << OldVal.toString(10) << Val.toString(10); 3151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 316f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 317f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 318f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 319f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 320f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.trunc(NewWidth); 321b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 322f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.extend(Val.getBitWidth()); 323b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 324f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 325d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 3261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 327f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 328f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 329f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.trunc(NewWidth); 330b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 331f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 332f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 333f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 334f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 335f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 3361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 337f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (Val.isNegative()) // Sign bit changes meaning. 338d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << OldVal.toString(10) << Val.toString(10); 339f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 340f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 341f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3420471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3430471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3440471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3450471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3460471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3470471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3480e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3490e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3500e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3510e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3520471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3530471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3540471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3550471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3560471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3570471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3580471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 359764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 360764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 361764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 362764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 363764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 364764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 365764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 366764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 367764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 368764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 369764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 370764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 371764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 372764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 3735f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// GetTypeBeforeIntegralPromotion - Returns the pre-promotion type of 3745f04881eb025f61396d0555d8173730fe2759e0aChris Lattner/// potentially integral-promoted expression @p expr. 3755f04881eb025f61396d0555d8173730fe2759e0aChris Lattnerstatic QualType GetTypeBeforeIntegralPromotion(const Expr* expr) { 3765f04881eb025f61396d0555d8173730fe2759e0aChris Lattner const ImplicitCastExpr *ImplicitCast = 3775f04881eb025f61396d0555d8173730fe2759e0aChris Lattner dyn_cast_or_null<ImplicitCastExpr>(expr); 3785f04881eb025f61396d0555d8173730fe2759e0aChris Lattner if (ImplicitCast != NULL) { 3795f04881eb025f61396d0555d8173730fe2759e0aChris Lattner const Expr *ExprBeforePromotion = ImplicitCast->getSubExpr(); 3805f04881eb025f61396d0555d8173730fe2759e0aChris Lattner QualType TypeBeforePromotion = ExprBeforePromotion->getType(); 3815f04881eb025f61396d0555d8173730fe2759e0aChris Lattner if (TypeBeforePromotion->isIntegralType()) { 3825f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return TypeBeforePromotion; 3835f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 3845f04881eb025f61396d0555d8173730fe2759e0aChris Lattner } 3855f04881eb025f61396d0555d8173730fe2759e0aChris Lattner return expr->getType(); 3865f04881eb025f61396d0555d8173730fe2759e0aChris Lattner} 3875f04881eb025f61396d0555d8173730fe2759e0aChris Lattner 3880be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor/// \brief Check (and possibly convert) the condition in a switch 3890be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor/// statement in C++. 3900be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregorstatic bool CheckCXXSwitchCondition(Sema &S, SourceLocation SwitchLoc, 3910be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor Expr *&CondExpr) { 3920be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (CondExpr->isTypeDependent()) 3930be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor return false; 3940be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 3950be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor QualType CondType = CondExpr->getType(); 3960be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 3970be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // C++ 6.4.2.p2: 3980be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // The condition shall be of integral type, enumeration type, or of a class 3990be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // type for which a single conversion function to integral or enumeration 4000be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // type exists (12.3). If the condition is of class type, the condition is 4010be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // converted by calling that conversion function, and the result of the 4020be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // conversion is used in place of the original condition for the remainder 4030be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // of this section. Integral promotions are performed. 4040be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4050be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // Make sure that the condition expression has a complete type, 4060be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // otherwise we'll never find any conversions. 4070be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (S.RequireCompleteType(SwitchLoc, CondType, 4080be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor PDiag(diag::err_switch_incomplete_class_type) 4090be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << CondExpr->getSourceRange())) 4100be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor return true; 4110be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4120be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor llvm::SmallVector<CXXConversionDecl *, 4> ViableConversions; 4130be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor llvm::SmallVector<CXXConversionDecl *, 4> ExplicitConversions; 4140be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (const RecordType *RecordTy = CondType->getAs<RecordType>()) { 415eec51cf1ba5f0e62c9cdb81b5c63babdd6e649abJohn McCall const UnresolvedSetImpl *Conversions 4160be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor = cast<CXXRecordDecl>(RecordTy->getDecl()) 4170be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ->getVisibleConversionFunctions(); 418eec51cf1ba5f0e62c9cdb81b5c63babdd6e649abJohn McCall for (UnresolvedSetImpl::iterator I = Conversions->begin(), 4190be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor E = Conversions->end(); I != E; ++I) { 4200be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(*I)) 4210be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (Conversion->getConversionType().getNonReferenceType() 4220be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ->isIntegralType()) { 4230be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (Conversion->isExplicit()) 4240be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ExplicitConversions.push_back(Conversion); 4250be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor else 4260be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ViableConversions.push_back(Conversion); 4270be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 4280be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 4290be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4300be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor switch (ViableConversions.size()) { 4310be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor case 0: 4320be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (ExplicitConversions.size() == 1) { 4330be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // The user probably meant to invoke the given explicit 4340be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // conversion; use it. 4350be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor QualType ConvTy 4360be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor = ExplicitConversions[0]->getConversionType() 4370be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor .getNonReferenceType(); 4380be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor std::string TypeStr; 4390be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ConvTy.getAsStringInternal(TypeStr, S.Context.PrintingPolicy); 4400be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4410be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor S.Diag(SwitchLoc, diag::err_switch_explicit_conversion) 4420be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << CondType << ConvTy << CondExpr->getSourceRange() 4430be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << CodeModificationHint::CreateInsertion(CondExpr->getLocStart(), 4440be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor "static_cast<" + TypeStr + ">(") 4450be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << CodeModificationHint::CreateInsertion( 4460be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor S.PP.getLocForEndOfToken(CondExpr->getLocEnd()), 4470be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor ")"); 4480be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor S.Diag(ExplicitConversions[0]->getLocation(), 4490be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor diag::note_switch_conversion) 4500be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << ConvTy->isEnumeralType() << ConvTy; 4510be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4520be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // If we aren't in a SFINAE context, build a call to the 4530be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // explicit conversion function. 4540be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor if (S.isSFINAEContext()) 4550be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor return true; 4560be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4570be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor CondExpr = S.BuildCXXMemberCallExpr(CondExpr, ExplicitConversions[0]); 4580be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 4590be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4600be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // We'll complain below about a non-integral condition type. 4610be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor break; 4620be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4630be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor case 1: 4640be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor // Apply this conversion. 4650be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor CondExpr = S.BuildCXXMemberCallExpr(CondExpr, ViableConversions[0]); 4660be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor break; 4670be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4680be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor default: 4690be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor S.Diag(SwitchLoc, diag::err_switch_multiple_conversions) 4700be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << CondType << CondExpr->getSourceRange(); 4710be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor for (unsigned I = 0, N = ViableConversions.size(); I != N; ++I) { 4720be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor QualType ConvTy 4730be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor = ViableConversions[I]->getConversionType().getNonReferenceType(); 4740be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor S.Diag(ViableConversions[I]->getLocation(), 4750be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor diag::note_switch_conversion) 4760be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor << ConvTy->isEnumeralType() << ConvTy; 4770be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 4780be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor return true; 4790be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 4800be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor } 4810be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4820be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor return false; 4830be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor} 4840be3193b3bc695eb4b0debc7f85bc832026ce862Douglas Gregor 4857e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner/// ActOnSwitchBodyError - This is called if there is an error parsing the 4867e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner/// body of the switch stmt instead of ActOnFinishSwitchStmt. 4877e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattnervoid Sema::ActOnSwitchBodyError(SourceLocation SwitchLoc, StmtArg Switch, 4887e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner StmtArg Body) { 4897e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner // Keep the switch stack balanced. 4907e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner assert(getSwitchStack().back() == (SwitchStmt*)Switch.get() && 4917e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner "switch stack missing push/pop!"); 4927e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner getSwitchStack().pop_back(); 4937e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner} 4947e52de4b45286d057b367bb1f9283a1e32d79252Chris Lattner 495de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 496de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, StmtArg Switch, 497de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg Body) { 498e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Stmt *BodyStmt = Body.takeAs<Stmt>(); 499de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 500bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner SwitchStmt *SS = getSwitchStack().back(); 501de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl assert(SS == (SwitchStmt*)Switch.get() && "switch stack missing push/pop!"); 502de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 5039dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 5041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump getSwitchStack().pop_back(); 505c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 506be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor if (SS->getCond() == 0) { 507be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor SS->Destroy(Context); 508be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor return StmtError(); 509be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor } 510be724bab2ba7ad47aebced25e7c8ec551eb72d28Douglas Gregor 511f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 51284fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor QualType CondTypeBeforePromotion = 51384fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor GetTypeBeforeIntegralPromotion(CondExpr); 514de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 5150de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor if (getLangOptions().CPlusPlus && 516a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor CheckCXXSwitchCondition(*this, SwitchLoc, CondExpr)) 5170de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor return StmtError(); 518a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor 5190de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 5200de55e7e6b8a53c5d1f2e9a811fd0a4ea13ed5b0Douglas Gregor UsualUnaryConversions(CondExpr); 521a0d3ca1ea5578bc736bb71bcec50ab41fefc87b9Douglas Gregor QualType CondType = CondExpr->getType(); 52284fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor SS->setCond(CondExpr); 52384fb9c0be621c9e4ca4e56f67dae2a0bb6e44821Douglas Gregor 5245f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // C++ 6.4.2.p2: 5255f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // Integral promotions are performed (on the switch condition). 5265f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // 5275f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // A case value unrepresentable by the original switch condition 5285f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // type (before the promotion) doesn't make sense, even when it can 5295f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // be represented by the promoted type. Therefore we need to find 5305f04881eb025f61396d0555d8173730fe2759e0aChris Lattner // the pre-promotion type of the switch condition. 53112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondExpr->isTypeDependent()) { 53212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (!CondType->isIntegerType()) { // C99 6.8.4.2p1 53312356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::err_typecheck_statement_requires_integer) 53412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondType << CondExpr->getSourceRange(); 53512356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan return StmtError(); 53612356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 53712356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan 53812356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan if (CondTypeBeforePromotion->isBooleanType()) { 53912356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(bool_expr) {...} is often a programmer error, e.g. 54012356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // switch(n && mask) { ... } // Doh - should be "n & mask". 54112356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan // One can always use an if statement instead of switch(bool_expr). 54212356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan Diag(SwitchLoc, diag::warn_bool_switch_condition) 54312356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan << CondExpr->getSourceRange(); 54412356b119032edd64e9c32f9f01920d12c2acc57Edward O'Callaghan } 545c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 546de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 547f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 548f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 5491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HasDependentValue 550dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 5511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned CondWidth 552dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = HasDependentValue? 0 5535f04881eb025f61396d0555d8173730fe2759e0aChris Lattner : static_cast<unsigned>(Context.getTypeSize(CondTypeBeforePromotion)); 5545f04881eb025f61396d0555d8173730fe2759e0aChris Lattner bool CondIsSigned = CondTypeBeforePromotion->isSignedIntegerType(); 5551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 556f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 557f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 558f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 5590471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner typedef llvm::SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 5600471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 5611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 562f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 563f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRanges; 5641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 565f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 5661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 567b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 5681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 569dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 570c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 5711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 572c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 573f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 574f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 5755f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 576de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 577f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 578390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 579390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 580390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 581b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 582c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 583f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 5841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 585f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 586f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 5871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 588f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 589f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 5901e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 591dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 592dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 593dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 594dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 595dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 5961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 59751fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 5981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 599f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 600f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 601f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CS->getLHS()->getLocStart(), 602f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 6036c36be5b383875b490684bcf439d6d427298c1afChris Lattner 6041e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 6051e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 60673c39abdbb79927605d740c93dd9629e3e4f9bfeEli Friedman ImpCastExprToType(Lo, CondType, CastExpr::CK_IntegralCast); 6071e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 6081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 609b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 610dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 6111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (CS->getRHS()->isTypeDependent() || 612dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 613dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 614dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 615dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 616f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 6171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 618b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 619f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 620f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 621b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 622dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 623dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 624dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 625dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 626dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 627dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseVals.size()-1; i != e; ++i) { 628dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CaseVals[i].first == CaseVals[i+1].first) { 629dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 630dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CaseVals[i+1].second->getLHS()->getLocStart(), 631dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::err_duplicate_case) << CaseVals[i].first.toString(10); 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(CaseVals[i].second->getLHS()->getLocStart(), 633dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 634390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 635390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 636dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 637dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6386efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 639b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 6401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 641dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 642dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 643dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 644dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 645dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 646dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 6471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 648dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 649dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 650dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 651dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 652dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 653dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 6541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 655dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 656dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 657dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->getRHS()->getLocStart(), 658dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 6591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 660dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the LHS is not the same type as the condition, insert an implicit 661dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // cast. 66273c39abdbb79927605d740c93dd9629e3e4f9bfeEli Friedman ImpCastExprToType(Hi, CondType, CastExpr::CK_IntegralCast); 663dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 6641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 665dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 666dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CaseRanges[i].first > HiVal) { 667dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 668dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 669dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->getRHS()->getLocEnd()); 670dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 671dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 672dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 673dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 674dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 6750471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 6761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 677dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 678dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 679dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 680dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 681dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 682dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 683dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 6841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 685dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 686dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 687dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 688dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 6891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 690dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 691dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 692dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 693dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 694dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 695dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 696dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 697dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 698dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 6991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 700dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 701dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 702dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 703dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 704dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 705dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 707dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 708dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 709dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 710dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 711dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 712dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 714dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 715dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 716dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 717dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 7181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(OverlapStmt->getLHS()->getLocStart(), 719dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 720390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 721390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 722dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 723dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 7240471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 725b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 726b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 727dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 728390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 729390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 730b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 731de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 732de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 733de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Switch.release(); 734de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 7355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 737f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 73899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas GregorSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, 73999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor DeclPtrTy CondVar, StmtArg Body) { 74099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor OwningExprResult CondResult(Cond.release()); 74199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 7425656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor VarDecl *ConditionVar = 0; 74399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondVar.get()) { 74499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor ConditionVar = CondVar.getAs<VarDecl>(); 74599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult = CheckConditionVariable(ConditionVar); 74699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CondResult.isInvalid()) 74799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 7485656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor } 74999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *ConditionExpr = CondResult.takeAs<Expr>(); 75099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (!ConditionExpr) 75199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 75299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 75399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (CheckBooleanCondition(ConditionExpr, WhileLoc)) { 75499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult = ConditionExpr; 7555a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 7564a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor } 7575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 758754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson Stmt *bodyStmt = Body.takeAs<Stmt>(); 759754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(bodyStmt); 7601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 76199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor CondResult.release(); 76299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return Owned(new (Context) WhileStmt(ConditionVar, ConditionExpr, bodyStmt, 7635656e14d91405417182171a705ed3e3d2d6d7aa3Douglas Gregor WhileLoc)); 7645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 766f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 767f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnDoStmt(SourceLocation DoLoc, StmtArg Body, 768989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 769989135901c750af61ef012b6b0a0368be415bc46Chris Lattner ExprArg Cond, SourceLocation CondRParen) { 770e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Expr *condExpr = Cond.takeAs<Expr>(); 7711b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnDoStmt(): missing expression"); 772f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 7735a881bb09928b7ade891efc680088aaad276f8d6John McCall if (CheckBooleanCondition(condExpr, DoLoc)) { 7749f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor Cond = condExpr; 7755a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 7769f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor } 7775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 778754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson Stmt *bodyStmt = Body.takeAs<Stmt>(); 779754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(bodyStmt); 780754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 781f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond.release(); 782754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson return Owned(new (Context) DoStmt(bodyStmt, condExpr, DoLoc, 783989135901c750af61ef012b6b0a0368be415bc46Chris Lattner WhileLoc, CondRParen)); 7845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 786f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 787f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 78899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor StmtArg first, FullExprArg second, DeclPtrTy secondVar, 78999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor FullExprArg third, 790f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation RParenLoc, StmtArg body) { 791f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *First = static_cast<Stmt*>(first.get()); 792f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 7935921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 7945921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 795f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 796f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 797f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 7985921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 7995921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 8005921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 8015921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD && VD->isBlockVarDecl() && !VD->hasLocalStorage()) 8025921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 8035921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 8045921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 8055921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 8065921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 807ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 8085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 80999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 81099e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor OwningExprResult SecondResult(second.release()); 81199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor VarDecl *ConditionVar = 0; 81299e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (secondVar.get()) { 81399e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor ConditionVar = secondVar.getAs<VarDecl>(); 81499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor SecondResult = CheckConditionVariable(ConditionVar); 81599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor if (SecondResult.isInvalid()) 81699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return StmtError(); 81799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor } 81899e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 81999e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Second = SecondResult.takeAs<Expr>(); 8205a881bb09928b7ade891efc680088aaad276f8d6John McCall if (Second && CheckBooleanCondition(Second, ForLoc)) { 82199e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor SecondResult = Second; 8225a881bb09928b7ade891efc680088aaad276f8d6John McCall return StmtError(); 8235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 82599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Expr *Third = third.release().takeAs<Expr>(); 82699e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor Stmt *Body = static_cast<Stmt*>(body.get()); 82799e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor 8283af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(First); 8293af708ff19e4ae2bf9e40550548361b00e5916bfAnders Carlsson DiagnoseUnusedExprResult(Third); 830754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson DiagnoseUnusedExprResult(Body); 831754431107b61a0523df5271c2876a73dd5a051e9Anders Carlsson 832f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl first.release(); 833f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl body.release(); 83499e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor return Owned(new (Context) ForStmt(First, Second, ConditionVar, Third, Body, 83599e9b4d172f6877e6ba5ebe75bb8238721f5e01cDouglas Gregor ForLoc, LParenLoc, RParenLoc)); 8365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 838f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 839f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 840f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 841f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl StmtArg first, ExprArg second, 842f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation RParenLoc, StmtArg body) { 843f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *First = static_cast<Stmt*>(first.get()); 844f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Second = static_cast<Expr*>(second.get()); 845f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *Body = static_cast<Stmt*>(body.get()); 84620552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 84720552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 84820552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 8497e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 850f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 851f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 852f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 8537e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner Decl *D = DS->getSingleDecl(); 854f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek FirstType = cast<ValueDecl>(D)->getType(); 855f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 856f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 857f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 858248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff VarDecl *VD = cast<VarDecl>(D); 859248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff if (VD->isBlockVarDecl() && !VD->hasLocalStorage()) 860f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(VD->getLocation(), 861f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 8621fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 863810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (cast<Expr>(First)->isLvalue(Context) != Expr::LV_Valid) 864f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 865f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 866f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 8671fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 8681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FirstType = static_cast<Expr*>(First)->getType(); 8691fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 8701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!FirstType->isObjCObjectPointerType() && 871a5e42a82ce055f29f3733f3a1f10da6cb9877deeFariborz Jahanian !FirstType->isBlockPointerType()) 872dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 873d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 8743ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 8753ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian if (Second) { 876a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(Second); 8773ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian QualType SecondType = Second->getType(); 878f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!SecondType->isObjCObjectPointerType()) 879dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_collection_expr_type) 880d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 8813ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 882f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl first.release(); 883f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl second.release(); 884f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl body.release(); 8858189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 8868189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 8873ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 8885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8894cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 8901b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnGotoStmt(SourceLocation GotoLoc, SourceLocation LabelLoc, 8915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *LabelII) { 8925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 893ea29a3a0d6948c4a51a261d19ec1a585d2a9c779Chris Lattner LabelStmt *&LabelDecl = getLabelMap()[LabelII]; 8945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 895caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff // If we haven't seen this label yet, create a forward reference. 896caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff if (LabelDecl == 0) 8978189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek LabelDecl = new (Context) LabelStmt(LabelLoc, LabelII, 0); 8984cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 8998189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) GotoStmt(LabelDecl, GotoLoc, LabelLoc)); 9005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9024cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 903ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 9044cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl ExprArg DestExp) { 905bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 90633083823342649b1fccec856c1f239c09fc0d7e1Eli Friedman Expr* E = DestExp.takeAs<Expr>(); 9075f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 9085f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 9092877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth QualType DestTy = Context.getPointerType(Context.VoidTy.withConst()); 9105f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 9112877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth CheckSingleAssignmentConstraints(DestTy, E); 9122877998bd8db2fac1c56430a4edcfa0ce138aff9Chandler Carruth if (DiagnoseAssignmentResult(ConvTy, StarLoc, DestTy, ETy, E, AA_Passing)) 9135f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 9145f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 9155f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 9165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9184cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 9191b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 9205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 9215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 9225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 9234cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 9245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9254cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 9268189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 9275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9294cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 9301b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 9315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 9325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 9335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 9344cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 9355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9364cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 9378189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 9385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 94027c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 9414eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 9424cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 9434eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 9444eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 9454eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 9467d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CurBlock->ReturnType.isNull()) { 947c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 94816564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 94916564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 950a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(RetValExp); 9517d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = RetValExp->getType(); 9527d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (BlockDeclRefExpr *CDRE = dyn_cast<BlockDeclRefExpr>(RetValExp)) { 9537d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // We have to remove a 'const' added to copied-in variable which was 9547d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // part of the implementation spec. and not the actual qualifier for 9557d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian // the variable. 9567d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian if (CDRE->isConstQualAdded()) 9577d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType.removeConst(); 9587d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian } 959c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 9607d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian CurBlock->ReturnType = Context.VoidTy; 9614eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 9627d5c74ecbbd8719436c071f38657bc8e97ee4a24Fariborz Jahanian QualType FnRetType = CurBlock->ReturnType; 9634cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 96440b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (CurBlock->TheDecl->hasAttr<NoReturnAttr>()) { 9656c92fa75e62937f9738696840efcb258560f4568Mike Stump Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr) 9666c92fa75e62937f9738696840efcb258560f4568Mike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 9676c92fa75e62937f9738696840efcb258560f4568Mike Stump return StmtError(); 9686c92fa75e62937f9738696840efcb258560f4568Mike Stump } 9696c92fa75e62937f9738696840efcb258560f4568Mike Stump 9704eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 9714eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 9724eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 9734eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 9744eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) { 9754eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 9768189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek RetValExp->Destroy(Context); 9774eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 9784eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 9798189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 9804eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 9814cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 9824cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl if (!RetValExp) 9834cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 9844cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 98598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 98698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // we have a non-void block with an expression, continue checking 98798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 9881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // C99 6.8.6.4p3(136): The return statement is not an assignment. The 9891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // overlap restriction of subclause 6.5.16.1 does not apply to the case of 99098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // function return. 9914cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 99298eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // In C++ the return statement is handled via a copy initialization. 99398eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // the C version of which boils down to CheckSingleAssignmentConstraints. 994c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson OwningExprResult Res = PerformCopyInitialization( 995c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson InitializedEntity::InitializeResult(ReturnLoc, 996c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson FnRetType), 997c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson SourceLocation(), 998c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson Owned(RetValExp)); 999c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson if (Res.isInvalid()) { 1000c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson // FIXME: Cleanup temporaries here, anyway? 100198eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump return StmtError(); 1002c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson } 1003c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson 1004c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson RetValExp = Res.takeAs<Expr>(); 1005c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson if (RetValExp) 1006c6acbc58a7aef0a3382775424c80e9534b54b2edAnders Carlsson CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 100798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 10084cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10098189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 10104eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 10115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1012e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl/// IsReturnCopyElidable - Whether returning @p RetExpr from a function that 1013e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl/// returns a @p RetType fulfills the criteria for copy elision (C++0x 12.8p15). 1014e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redlstatic bool IsReturnCopyElidable(ASTContext &Ctx, QualType RetType, 1015e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl Expr *RetExpr) { 1016e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl QualType ExprType = RetExpr->getType(); 1017e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // - in a return statement in a function with ... 1018e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // ... a class return type ... 1019e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (!RetType->isRecordType()) 1020e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 1021e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // ... the same cv-unqualified type as the function return type ... 1022a4923eb7c4b04d360cb2747641a5e92818edf804Douglas Gregor if (!Ctx.hasSameUnqualifiedType(RetType, ExprType)) 1023e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 1024e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // ... the expression is the name of a non-volatile automatic object ... 1025e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // We ignore parentheses here. 1026e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // FIXME: Is this compliant? 1027e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(RetExpr->IgnoreParens()); 1028e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (!DR) 1029e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 1030e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 1031e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (!VD) 1032e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 1033e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return VD->hasLocalStorage() && !VD->getType()->isReferenceType() 1034e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl && !VD->getType().isVolatileQualified(); 1035e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl} 1036e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl 10374cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 1038f53b4433abb7a3bc14c0329d3175cbc291280137Anders CarlssonSema::ActOnReturnStmt(SourceLocation ReturnLoc, ExprArg rex) { 1039f53b4433abb7a3bc14c0329d3175cbc291280137Anders Carlsson Expr *RetValExp = rex.takeAs<Expr>(); 10404eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock) 10414eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 10424cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1043371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 1044f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 1045371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 104640b598eea1310ec9ed554d56ce3e25b34c585458Argyrios Kyrtzidis if (FD->hasAttr<NoReturnAttr>()) 10478662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 1048f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 1049f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump } else if (ObjCMethodDecl *MD = getCurMethodDecl()) 1050c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff FnRetType = MD->getResultType(); 1051c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff else // If we don't have a function/method context, bail. 1052c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 10531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10545cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 10551be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor if (RetValExp && !RetValExp->isTypeDependent()) { 10561be8aee8745e8b814ad2f151aa214b0ef07833dbDouglas Gregor // C99 6.8.6.4p1 (ext_ since GCC warns) 105765ce04bef06696379682410f399f37b43996d824Chris Lattner unsigned D = diag::ext_return_has_expr; 105865ce04bef06696379682410f399f37b43996d824Chris Lattner if (RetValExp->getType()->isVoidType()) 105965ce04bef06696379682410f399f37b43996d824Chris Lattner D = diag::ext_return_has_void_expr; 10604cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1061e878eb035b343d7d819c092102364ec9849716aeChris Lattner // return (some void expression); is legal in C++. 1062e878eb035b343d7d819c092102364ec9849716aeChris Lattner if (D != diag::ext_return_has_void_expr || 1063e878eb035b343d7d819c092102364ec9849716aeChris Lattner !getLangOptions().CPlusPlus) { 1064e878eb035b343d7d819c092102364ec9849716aeChris Lattner NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 1065e878eb035b343d7d819c092102364ec9849716aeChris Lattner Diag(ReturnLoc, D) 1066e878eb035b343d7d819c092102364ec9849716aeChris Lattner << CurDecl->getDeclName() << isa<ObjCMethodDecl>(CurDecl) 1067e878eb035b343d7d819c092102364ec9849716aeChris Lattner << RetValExp->getSourceRange(); 1068e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 10691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10700ece491d8f62ce67f047491a6703fac0d3bd4ff4Anders Carlsson RetValExp = MaybeCreateCXXExprWithTemporaries(RetValExp); 10715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10728189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 10735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10744cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 107503d77760a5db7990724b6901cea958a673ce0b39Anders Carlsson if (!RetValExp && !FnRetType->isDependentType()) { 10763c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 10773c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 10783c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 10793c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 10803c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 108108631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 10823c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 108308631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 10848189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, (Expr*)0)); 10853c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner } 10864cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1087898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 1088898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // we have a non-void function with an expression, continue checking 10894cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 10901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // C99 6.8.6.4p3(136): The return statement is not an assignment. The 10911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // overlap restriction of subclause 6.5.16.1 does not apply to the case of 10924cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // function return. 10934cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 1094e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // C++0x 12.8p15: When certain criteria are met, an implementation is 1095e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // allowed to omit the copy construction of a class object, [...] 1096e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // - in a return statement in a function with a class return type, when 1097e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // the expression is the name of a non-volatile automatic object with 1098e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // the same cv-unqualified type as the function return type, the copy 1099e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // operation can be omitted [...] 1100e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // C++0x 12.8p16: When the criteria for elision of a copy operation are met 1101e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // and the object to be copied is designated by an lvalue, overload 1102e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // resolution to select the constructor for the copy is first performed 1103e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // as if the object were designated by an rvalue. 1104e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // Note that we only compute Elidable if we're in C++0x, since we don't 1105e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // care otherwise. 1106e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl bool Elidable = getLangOptions().CPlusPlus0x ? 1107e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl IsReturnCopyElidable(Context, FnRetType, RetValExp) : 1108e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl false; 110918ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor // FIXME: Elidable 111018ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor (void)Elidable; 111118ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor 1112898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // In C++ the return statement is handled via a copy initialization. 11134cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // the C version of which boils down to CheckSingleAssignmentConstraints. 1114bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor OwningExprResult Res = PerformCopyInitialization( 1115bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor InitializedEntity::InitializeResult(ReturnLoc, 1116d6542d8efcf8389c3aab764f9e29ac284e16eda6Douglas Gregor FnRetType), 1117bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor SourceLocation(), 1118bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor Owned(RetValExp)); 1119bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor if (Res.isInvalid()) { 112018ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor // FIXME: Cleanup temporaries here, anyway? 11214cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(); 112266724ea67d7d598b937d86fa66f03f09a1c758f3Douglas Gregor } 112318ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor 1124bd8f371fec3d69e5fd8e173e1bf4020225dd47d9Douglas Gregor RetValExp = Res.takeAs<Expr>(); 112518ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor if (RetValExp) 112618ef5e28a9a2677f8b1dce1fb2638d66e0a1621fDouglas Gregor CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 1127898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 1128898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 1129f53b4433abb7a3bc14c0329d3175cbc291280137Anders Carlsson if (RetValExp) 11300ece491d8f62ce67f047491a6703fac0d3bd4ff4Anders Carlsson RetValExp = MaybeCreateCXXExprWithTemporaries(RetValExp); 11318189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 11325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 11335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1134810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 1135810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 1136810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 1137810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 1138810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 1139810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 1140810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 1141810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 1142703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson // Type dependent expressions will be checked during instantiation. 1143703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson if (E->isTypeDependent()) 1144703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson return false; 1145703e39486689d6660e75f6b6de0068db031a51c7Anders Carlsson 1146810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (E->isLvalue(S.Context) == Expr::LV_Valid) 1147810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 1148810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1149810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 1150810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 1151810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 1152810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (E != E2 && E2->isLvalue(S.Context) == Expr::LV_Valid) { 1153810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (!S.getLangOptions().HeinousExtensions) 1154810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 1155810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1156810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 1157810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 1158810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 1159810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 1160810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 1161810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 1162810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1163810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 1164810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 1165810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 1166810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 1167810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 11683037ed0a27dba62e522304183718efc149e8b6d9Sebastian RedlSema::OwningStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, 11693037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsSimple, 11703037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsVolatile, 11713037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumOutputs, 11723037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumInputs, 1173ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson IdentifierInfo **Names, 11743037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg constraints, 11753037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg exprs, 11763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl ExprArg asmString, 11773037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg clobbers, 11783b11fd3b52e7b88233c602407c151d07cb093e75Mike Stump SourceLocation RParenLoc, 11793b11fd3b52e7b88233c602407c151d07cb093e75Mike Stump bool MSAsm) { 11803037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 11813037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 11823037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 11833037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl Expr **Exprs = reinterpret_cast<Expr **>(exprs.get()); 11843037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral *AsmString = cast<StringLiteral>((Expr *)asmString.get()); 11853037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 11863037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 118703eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson llvm::SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 11881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11891708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 11906bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (AsmString->isWide()) 11913037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 11923037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 11933037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 11941708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 11951708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 11966bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 11973037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 11983037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 11993037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1200ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef OutputName; 1201ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1202ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson OutputName = Names[i]->getName(); 1203ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1204ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 1205432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner if (!Context.Target.validateOutputConstraint(Info)) 12063037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1207432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 1208432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 12093037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1210d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 121172056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 1212810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 121372056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 1214dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 121572056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 121604728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 12171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 121844def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 121904728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 12203037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1221806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner llvm::SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 1222806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 122304728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 12241708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 12256bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 12263037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 12273037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 12283037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1229ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson llvm::StringRef InputName; 1230ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson if (Names[i]) 1231ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson InputName = Names[i]->getName(); 1232ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson 1233ff93dbd887e40588ed55d135037bb9287488b285Anders Carlsson TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 1234beaaccd8e2a8748f77b66e2b330fb9136937e14cJay Foad if (!Context.Target.validateInputConstraint(OutputConstraintInfos.data(), 12352819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 12363037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1237432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 1238432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 1239d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 12403037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 124172056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 12423037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1243d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 124444def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 1245810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 124672056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1247d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 1248432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 124972056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 125004728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 12513037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 125244def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 1253d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 125472056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1255d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 12561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump << InputExpr->getType() << Info.getConstraintStr() 125772056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 1258d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 1259d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 12601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1261a873dfc9e7314681bb37efd9ab185045de121e43Douglas Gregor DefaultFunctionArrayLvalueConversion(Exprs[i]); 12621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1263806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 126404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 12653037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 12666fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 12671708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 12681708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 12696bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 12703037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 12713037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 12723037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1273fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson llvm::StringRef Clobber = Literal->getString(); 12743037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1275fdba9c069023f686e2608affde02c82131ee1cf8Anders Carlsson if (!Context.Target.isValidGCCRegisterName(Clobber)) 12763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 12777765934ad7e157b5fcf925792a38e01b1edbcf8aDaniel Dunbar diag::err_asm_unknown_register_name) << Clobber); 12786fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 12793037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 12803037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl constraints.release(); 12813037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl exprs.release(); 12823037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl asmString.release(); 12833037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl clobbers.release(); 1284fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 1285966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson new (Context) AsmStmt(Context, AsmLoc, IsSimple, IsVolatile, MSAsm, 1286966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson NumOutputs, NumInputs, Names, Constraints, Exprs, 1287966146e89141804ff6492739a2a6e6592ca671c7Anders Carlsson AsmString, NumClobbers, Clobbers, RParenLoc); 1288fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 1289fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 1290fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner llvm::SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 1291fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 1292fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 12932ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 12942ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 1295fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner DeleteStmt(NS); 1296fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 1297fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 12981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1299806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 1300806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 1301806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 13021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1303806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 1304806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 1305806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 1306806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 13071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1308806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 1309f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 1310c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Expr *InputExpr = Exprs[i+NumOutputs]; 13117adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 13127adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 13137adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 1314806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 13151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13167adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // Int/ptr operands have some special cases that we allow. 13177adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if ((OutTy->isIntegerType() || OutTy->isPointerType()) && 13187adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner (InTy->isIntegerType() || InTy->isPointerType())) { 13191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13207adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // They are ok if they are the same size. Tying void* to int is ok if 13217adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // they are the same size, for example. This also allows tying void* to 13227adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // int*. 13233351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 13243351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 13253351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (OutSize == InSize) 1326806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; 13271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13283351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 13293351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // then we can promote it and the asm string won't notice. Check this 1330f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner // case now. 13313351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner bool SmallerValueMentioned = false; 133258bce89d12b1dfba16637ce3754d6cb24c3099bbChris Lattner for (unsigned p = 0, e = Pieces.size(); p != e; ++p) { 133358bce89d12b1dfba16637ce3754d6cb24c3099bbChris Lattner AsmStmt::AsmStringPiece &Piece = Pieces[p]; 133458bce89d12b1dfba16637ce3754d6cb24c3099bbChris Lattner if (!Piece.isOperand()) continue; 13351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13363351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If this is a reference to the input and if the input was the smaller 13373351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // one, then we have to reject this asm. 13383351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (Piece.getOperandNo() == i+NumOutputs) { 13393351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (InSize < OutSize) { 13403351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner SmallerValueMentioned = true; 13413351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner break; 13423351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 13433351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 13443351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 13453351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If this is a reference to the input and if the input was the smaller 13463351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // one, then we have to reject this asm. 13473351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (Piece.getOperandNo() == TiedTo) { 13483351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (InSize > OutSize) { 13493351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner SmallerValueMentioned = true; 13503351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner break; 13513351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 13523351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 1353f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner } 13541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13553351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 13563351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // output was a register, just extend the shorter one to the size of the 13573351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // larger one. 13583351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (!SmallerValueMentioned && 1359f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 1360f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner continue; 1361806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 13621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1363c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 1364806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 13657adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 1366806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 1367806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner DeleteStmt(NS); 1368806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 1369806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 13701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1371fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 1372fe795956194141c91ae555985c9b930595bff43fChris Lattner} 13733b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 1374431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1375431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 1376b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner SourceLocation RParen, DeclPtrTy Parm, 1377431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg Body, StmtArg catchList) { 1378f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *CatchList = catchList.takeAs<Stmt>(); 1379b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner ParmVarDecl *PVD = cast_or_null<ParmVarDecl>(Parm.getAs<Decl>()); 13801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1381f50cb369273c6bd26c9629df92ee53f1d8af4149Steve Naroff // PVD == 0 implies @catch(...). 13829d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff if (PVD) { 138393c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner // If we already know the decl is invalid, reject it. 138493c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner if (PVD->isInvalidDecl()) 138593c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner return StmtError(); 13861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1387f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!PVD->getType()->isObjCObjectPointerType()) 13881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return StmtError(Diag(PVD->getLocation(), 13899d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff diag::err_catch_param_not_objc_type)); 13909d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff if (PVD->getType()->isObjCQualifiedIdType()) 13911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return StmtError(Diag(PVD->getLocation(), 1392d198abae5938262e501a409e833bf01ca8b8253eSteve Naroff diag::err_illegal_qualifiers_on_catch_parm)); 13939d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff } 139493c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner 13958189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ObjCAtCatchStmt *CS = new (Context) ObjCAtCatchStmt(AtLoc, RParen, 1396e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson PVD, Body.takeAs<Stmt>(), CatchList); 1397431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl return Owned(CatchList ? CatchList : CS); 13983b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 13993b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 1400431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1401431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, StmtArg Body) { 14028189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, 14038189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(Body.release()))); 1404161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 1405bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1406431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1407431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, 1408431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg Try, StmtArg Catch, StmtArg Finally) { 140938c5ebd7b1b65304c7b5c7b9bf3f9162df22e77dChris Lattner CurFunctionNeedsScopeChecking = true; 1410e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson return Owned(new (Context) ObjCAtTryStmt(AtLoc, Try.takeAs<Stmt>(), 1411e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Catch.takeAs<Stmt>(), 1412e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Finally.takeAs<Stmt>())); 1413bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 1414bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1415431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 14163dcfe10a6801eb52f4c20f1242bea0a3a98aa146Steve NaroffSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, ExprArg expr,Scope *CurScope) { 1417f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Expr *ThrowExpr = expr.takeAs<Expr>(); 14187151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!ThrowExpr) { 1419e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 1420e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 1421e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 1422e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 1423e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 1424e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 14254ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 14267151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } else { 14277151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff QualType ThrowType = ThrowExpr->getType(); 14287151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff // Make sure the expression type is an ObjC pointer or "void *". 1429f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!ThrowType->isObjCObjectPointerType()) { 14306217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const PointerType *PT = ThrowType->getAs<PointerType>(); 14317151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!PT || !PT->getPointeeType()->isVoidType()) 14324ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 14334ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff << ThrowExpr->getType() << ThrowExpr->getSourceRange()); 14347151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } 14357151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } 14367151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff return Owned(new (Context) ObjCAtThrowStmt(AtLoc, ThrowExpr)); 143739f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 1438bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1439431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1440431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, ExprArg SynchExpr, 1441431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg SynchBody) { 144246c3c4ba78766ac0f1c5ec631b424773e21f5271Chris Lattner CurFunctionNeedsScopeChecking = true; 144346c3c4ba78766ac0f1c5ec631b424773e21f5271Chris Lattner 1444a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 1445a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner Expr *SyncExpr = static_cast<Expr*>(SynchExpr.get()); 1446f49545602089be5b1f744e04326b8a566f6d8773Steve Naroff if (!SyncExpr->getType()->isObjCObjectPointerType()) { 14476217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const PointerType *PT = SyncExpr->getType()->getAs<PointerType>(); 1448a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner if (!PT || !PT->getPointeeType()->isVoidType()) 1449a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner return StmtError(Diag(AtLoc, diag::error_objc_synchronized_expects_object) 1450a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner << SyncExpr->getType() << SyncExpr->getSourceRange()); 1451a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 14521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, 1454e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson SynchExpr.takeAs<Stmt>(), 1455e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson SynchBody.takeAs<Stmt>())); 1456fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 14574b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 14584b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 14594b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 14604b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian RedlAction::OwningStmtResult 1461b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris LattnerSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, DeclPtrTy ExDecl, 14624b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl StmtArg HandlerBlock) { 14634b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 14648189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 1465b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner cast_or_null<VarDecl>(ExDecl.getAs<Decl>()), 1466e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson HandlerBlock.takeAs<Stmt>())); 14674b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 14688351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 1469c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlclass TypeWithHandler { 1470c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType t; 1471c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *stmt; 1472c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redlpublic: 1473c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler(const QualType &type, CXXCatchStmt *statement) 1474c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl : t(type), stmt(statement) {} 1475c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 14760953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // An arbitrary order is fine as long as it places identical 14770953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // types next to each other. 1478c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator<(const TypeWithHandler &y) const { 14790953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() < y.t.getAsOpaquePtr()) 1480c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return true; 14810953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (t.getAsOpaquePtr() > y.t.getAsOpaquePtr()) 1482c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return false; 1483c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl else 1484c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return getTypeSpecStartLoc() < y.getTypeSpecStartLoc(); 1485c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 14861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1487c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl bool operator==(const TypeWithHandler& other) const { 14880953e767ff7817f97b3ab20896b229891eeff45bJohn McCall return t == other.t; 1489c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 14901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1491c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl QualType getQualType() const { return t; } 1492c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl CXXCatchStmt *getCatchStmt() const { return stmt; } 1493c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl SourceLocation getTypeSpecStartLoc() const { 1494c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return stmt->getExceptionDecl()->getTypeSpecStartLoc(); 1495c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 1496c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl}; 1497c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 14988351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 14998351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 15008351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlAction::OwningStmtResult 15018351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlSema::ActOnCXXTryBlock(SourceLocation TryLoc, StmtArg TryBlock, 15028351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 15038351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 15048351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 15058351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 15068351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl Stmt **Handlers = reinterpret_cast<Stmt**>(RawHandlers.get()); 15078351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 1508c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::SmallVector<TypeWithHandler, 8> TypesWithHandlers; 15091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (unsigned i = 0; i < NumHandlers; ++i) { 15118351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl CXXCatchStmt *Handler = llvm::cast<CXXCatchStmt>(Handlers[i]); 1512c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (!Handler->getExceptionDecl()) { 1513c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (i < NumHandlers - 1) 1514c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl return StmtError(Diag(Handler->getLocStart(), 1515c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::err_early_catch_all)); 15161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1517c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl continue; 1518c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 15191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1520c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CaughtType = Handler->getCaughtType(); 1521c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl const QualType CanonicalCaughtType = Context.getCanonicalType(CaughtType); 1522c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypesWithHandlers.push_back(TypeWithHandler(CanonicalCaughtType, Handler)); 1523c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 1524c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl 1525c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl // Detect handlers for the same type as an earlier one. 1526c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (NumHandlers > 1) { 1527c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl llvm::array_pod_sort(TypesWithHandlers.begin(), TypesWithHandlers.end()); 15281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1529c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler prev = TypesWithHandlers[0]; 1530c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl for (unsigned i = 1; i < TypesWithHandlers.size(); ++i) { 1531c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl TypeWithHandler curr = TypesWithHandlers[i]; 15321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1533c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl if (curr == prev) { 1534c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(curr.getTypeSpecStartLoc(), 1535c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::warn_exception_caught_by_earlier_handler) 1536c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << curr.getCatchStmt()->getCaughtType().getAsString(); 1537c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl Diag(prev.getTypeSpecStartLoc(), 1538c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl diag::note_previous_exception_handler) 1539c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl << prev.getCatchStmt()->getCaughtType().getAsString(); 1540c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 15411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1542c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl prev = curr; 1543c447aba04527a71d254b151f79f444d1cbe83ce9Sebastian Redl } 15448351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 15451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15468351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 15478351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 15488351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 15498351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 15508351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 15518351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 1552972041f45bdf8df7ea447221292d7827466ba94bSebastian Redl CurFunctionNeedsScopeChecking = true; 15538351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl RawHandlers.release(); 1554a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig return Owned(CXXTryStmt::Create(Context, TryLoc, 1555a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig static_cast<Stmt*>(TryBlock.release()), 1556a1a396df16c02b22983b5c9592022fd9237d4866Sam Weinig Handlers, NumHandlers)); 15578351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 1558