SemaStmt.cpp revision 989135901c750af61ef012b6b0a0368be415bc46
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" 1551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson#include "clang/AST/APValue.h" 16f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner#include "clang/AST/ASTContext.h" 17c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/Expr.h" 1916f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtObjC.h" 2016f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtCXX.h" 216fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson#include "clang/Basic/TargetInfo.h" 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 246b1d283fe879fb11d7ce7a69feecf66e77b0eaf3Anders CarlssonSema::OwningStmtResult Sema::ActOnExprStmt(FullExprArg expr) { 256b1d283fe879fb11d7ce7a69feecf66e77b0eaf3Anders Carlsson Expr *E = expr->takeAs<Expr>(); 261b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(E && "ActOnExprStmt(): missing expression"); 27a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 28834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // C99 6.8.3p2: The expression in an expression statement is evaluated as a 29834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // void expression for its side effects. Conversion to void allows any 30834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // operand, even incomplete types. 31a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 32834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // Same thing in for stmt first clause (when expr) and third clause. 33a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(static_cast<Stmt*>(E)); 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 37a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian RedlSema::OwningStmtResult Sema::ActOnNullStmt(SourceLocation SemiLoc) { 388189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) NullStmt(SemiLoc)); 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 41682bf92db408a6cbc3d37b5496a99b6ef85041ecChris LattnerSema::OwningStmtResult Sema::ActOnDeclStmt(DeclGroupPtrTy dg, 42a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl SourceLocation StartLoc, 43a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl SourceLocation EndLoc) { 4420401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner DeclGroupRef DG = dg.getAsVal<DeclGroupRef>(); 4520401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner 46682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // If we have an invalid decl, just return an error. 4720401698e3bd93a24bb5d9e18e435895cefe5fd1Chris Lattner if (DG.isNull()) return StmtError(); 48682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner 4924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return Owned(new (Context) DeclStmt(DG, StartLoc, EndLoc)); 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 52a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian RedlAction::OwningStmtResult 531b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 54a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 55a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 56a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 57c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 58c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 59c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus) { 60c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 61c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 62c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 63c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 64c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 65c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 66c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 67c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 68c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 69c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 70c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 714afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 72c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 73c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 74c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 7598414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 7698414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 7798414c1b7d1944a57156d52e29bd41c005de09acChris Lattner Expr *E = dyn_cast<Expr>(Elts[i]); 7898414c1b7d1944a57156d52e29bd41c005de09acChris Lattner if (!E) continue; 7998414c1b7d1944a57156d52e29bd41c005de09acChris Lattner 80026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner // Warn about expressions with unused results if they are non-void and if 81026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner // this not the last stmt in a stmt expr. 82026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner if (E->getType()->isVoidType() || (isStmtExpr && i == NumElts-1)) 8398414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 8498414c1b7d1944a57156d52e29bd41c005de09acChris Lattner 85026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner SourceLocation Loc; 86026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner SourceRange R1, R2; 87026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner if (!E->isUnusedResultAWarning(Loc, R1, R2)) 8898414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 89026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner 90026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner Diag(Loc, diag::warn_unused_expr) << R1 << R2; 9198414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 92a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 938189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 96117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlAction::OwningStmtResult 97117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlSema::ActOnCaseStmt(SourceLocation CaseLoc, ExprArg lhsval, 98117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl SourceLocation DotDotDotLoc, ExprArg rhsval, 9924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 100117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl assert((lhsval.get() != 0) && "missing expression in case statement"); 101117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.4.2p3: The expression shall be an integer constant. 10351fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // However, GCC allows any evaluatable integer expression. 104117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Expr *LHSVal = static_cast<Expr*>(lhsval.get()); 105dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!LHSVal->isTypeDependent() && !LHSVal->isValueDependent() && 106dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(LHSVal)) 10724e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1096c36be5b383875b490684bcf439d6d427298c1afChris Lattner // GCC extension: The expression shall be an integer constant. 110117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 111117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Expr *RHSVal = static_cast<Expr*>(rhsval.get()); 112dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (RHSVal && !RHSVal->isTypeDependent() && !RHSVal->isValueDependent() && 113dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor VerifyIntegerConstantExpression(RHSVal)) { 114f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner RHSVal = 0; // Recover by just forgetting about it. 115117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl rhsval = 0; 116117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl } 117117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 118bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner if (getSwitchStack().empty()) { 1198a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner Diag(CaseLoc, diag::err_case_not_in_switch); 12024e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1218a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 123117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl // Only now release the smart pointers. 124117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl lhsval.release(); 125117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl rhsval.release(); 126dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc, DotDotDotLoc, 127dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ColonLoc); 128bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner getSwitchStack().back()->addSwitchCase(CS); 129117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 13224e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 13324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattnervoid Sema::ActOnCaseStmtBody(StmtTy *caseStmt, StmtArg subStmt) { 13424e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 135f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *SubStmt = subStmt.takeAs<Stmt>(); 13624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 13724e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 13824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 139117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlAction::OwningStmtResult 1401b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 141117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl StmtArg subStmt, Scope *CurScope) { 142f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *SubStmt = subStmt.takeAs<Stmt>(); 143117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 144bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner if (getSwitchStack().empty()) { 1450fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 146117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 1470fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 148117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 149dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, ColonLoc, SubStmt); 150bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner getSwitchStack().back()->addSwitchCase(DS); 151117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 154de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 1551b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II, 156de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl SourceLocation ColonLoc, StmtArg subStmt) { 157f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *SubStmt = subStmt.takeAs<Stmt>(); 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 159ea29a3a0d6948c4a51a261d19ec1a585d2a9c779Chris Lattner LabelStmt *&LabelDecl = getLabelMap()[II]; 160de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If not forward referenced or defined already, just create a new LabelStmt. 162caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff if (LabelDecl == 0) 163caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff return Owned(LabelDecl = new (Context) LabelStmt(IdentLoc, II, SubStmt)); 164de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(LabelDecl->getID() == II && "Label mismatch!"); 166de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was either forward reference or multiply defined. If 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // multiply defined, reject it now. 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LabelDecl->getSubStmt()) { 17008631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << LabelDecl->getID(); 1715f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(LabelDecl->getIdentLoc(), diag::note_previous_definition); 172de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 174de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was forward declared, and we just found its real 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // definition. Fill in the forward definition and return it. 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelDecl->setIdentLoc(IdentLoc); 1780fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner LabelDecl->setSubStmt(SubStmt); 179de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(LabelDecl); 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 182de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 183a99fad8ff134273fe85f2970c7d89133d1218900Anders CarlssonSema::ActOnIfStmt(SourceLocation IfLoc, FullExprArg CondVal, 184de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg ThenVal, SourceLocation ElseLoc, 185de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg ElseVal) { 186a99fad8ff134273fe85f2970c7d89133d1218900Anders Carlsson OwningExprResult CondResult(CondVal.release()); 187a99fad8ff134273fe85f2970c7d89133d1218900Anders Carlsson 188a99fad8ff134273fe85f2970c7d89133d1218900Anders Carlsson Expr *condExpr = CondResult.takeAs<Expr>(); 189de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1901b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnIfStmt(): missing expression"); 191de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 192d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor if (!condExpr->isTypeDependent()) { 193d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor DefaultFunctionArrayConversion(condExpr); 194d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor // Take ownership again until we're past the error checking. 195a99fad8ff134273fe85f2970c7d89133d1218900Anders Carlsson CondResult = condExpr; 196d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor QualType condType = condExpr->getType(); 197d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor 198d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor if (getLangOptions().CPlusPlus) { 199d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 200d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor return StmtError(); 201d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor } else if (!condType->isScalarType()) // C99 6.8.4.1p1 202d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor return StmtError(Diag(IfLoc, 203d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor diag::err_typecheck_statement_requires_scalar) 204d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor << condType << condExpr->getSourceRange()); 205d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor } 206de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 207e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Stmt *thenStmt = ThenVal.takeAs<Stmt>(); 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2092d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 2102d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 2112d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 2122d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 213de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl if (!ElseVal.get()) { 2142d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 2152d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 2162d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 2172d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 218a99fad8ff134273fe85f2970c7d89133d1218900Anders Carlsson CondResult.release(); 2198189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) IfStmt(IfLoc, condExpr, thenStmt, 220d06f6ca61062f85926eb9d409eb3d4f8afcf93c7Douglas Gregor ElseLoc, ElseVal.takeAs<Stmt>())); 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 223de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 224de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlSema::ActOnStartOfSwitchStmt(ExprArg cond) { 225f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Expr *Cond = cond.takeAs<Expr>(); 226de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2275921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 2285921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // C++ 6.4.2.p2: 2295921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // The condition shall be of integral type, enumeration type, or of a class 2305921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // type for which a single conversion function to integral or enumeration 2315921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // type exists (12.3). If the condition is of class type, the condition is 2325921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // converted by calling that conversion function, and the result of the 2335921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // conversion is used in place of the original condition for the remainder 2345921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // of this section. Integral promotions are performed. 235dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!Cond->isTypeDependent()) { 236dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor QualType Ty = Cond->getType(); 237dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 238dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // FIXME: Handle class types. 239dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 240dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the type is wrong a diagnostic will be emitted later at 241dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ActOnFinishSwitchStmt. 242dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Ty->isIntegralType() || Ty->isEnumeralType()) { 243dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Integral promotions are performed. 244dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // FIXME: Integral promotions for C++ are not complete. 245dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor UsualUnaryConversions(Cond); 246dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 2475921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 2485921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else { 2495921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 2505921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis UsualUnaryConversions(Cond); 2515921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 252de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2538189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek SwitchStmt *SS = new (Context) SwitchStmt(Cond); 254bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner getSwitchStack().push_back(SS); 255de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 256c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson} 2576c36be5b383875b490684bcf439d6d427298c1afChris Lattner 258f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 259f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 260f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 261f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 262f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 263f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner SourceLocation Loc, 264f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 265f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 266f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 267f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 268f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 269f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.extend(NewWidth); 270f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 271f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If the input was signed and negative and the output is unsigned, 272f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // warn. 273f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (!NewSign && OldVal.isSigned() && OldVal.isNegative()) 274d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << OldVal.toString(10) << Val.toString(10); 275f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 276f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 277f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 278f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 279f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 280f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.trunc(NewWidth); 281b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 282f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.extend(Val.getBitWidth()); 283b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 284f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 285d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 286f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 287f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 288f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 289f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.trunc(NewWidth); 290b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 291f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 292f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 293f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 294f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 295f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 296f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 297f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (Val.isNegative()) // Sign bit changes meaning. 298d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << OldVal.toString(10) << Val.toString(10); 299f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 300f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 301f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3020471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3030471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3040471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3050471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3060471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3070471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3080e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3090e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3100e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3110e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3120471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3130471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3140471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3150471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3160471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3170471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3180471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 319764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 320764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 321764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 322764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 323764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 324764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 325764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 326764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 327764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 328764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 329764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 330764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 331764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 332764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 333de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 334de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, StmtArg Switch, 335de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg Body) { 336e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Stmt *BodyStmt = Body.takeAs<Stmt>(); 337de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 338bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner SwitchStmt *SS = getSwitchStack().back(); 339de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl assert(SS == (SwitchStmt*)Switch.get() && "switch stack missing push/pop!"); 340de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 3419dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 342bcfce66584e47bb07f49a86b7cb39b4fdd269a5aChris Lattner getSwitchStack().pop_back(); 343c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 344f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 345f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner QualType CondType = CondExpr->getType(); 346de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 347dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CondExpr->isTypeDependent() && 348dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor !CondType->isIntegerType()) { // C99 6.8.4.2p1 349d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(SwitchLoc, diag::err_typecheck_statement_requires_integer) 350d162584991885ab004a02573a73ce06422b921fcChris Lattner << CondType << CondExpr->getSourceRange(); 351de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 352c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 353de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 354f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 355f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 356dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor bool HasDependentValue 357dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = CondExpr->isTypeDependent() || CondExpr->isValueDependent(); 358dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor unsigned CondWidth 359dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor = HasDependentValue? 0 360dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor : static_cast<unsigned>(Context.getTypeSize(CondType)); 361f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner bool CondIsSigned = CondType->isSignedIntegerType(); 362f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 363f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 364f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 365f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 3660471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner typedef llvm::SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 3670471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 368f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 369f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 370f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRanges; 371f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 372f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 373c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 374b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 375b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 376dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (SwitchCase *SC = SS->getSwitchCaseList(); SC && !HasDependentValue; 377c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 378b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 379c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 380f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 381f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 3825f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 383de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 384f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 385390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // we'll return a valid AST. This requires recursing down the AST and 386390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // finding it, not something we are set up to do right now. For now, 387390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // just lop the entire switch stmt out of the AST. 388b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 389c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 390f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 391c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 392f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 393f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 394f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 395f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 396f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 3971e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 398dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 399dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (Lo->isTypeDependent() || Lo->isValueDependent()) { 400dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 401dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 402dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 403dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 40451fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 405f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 406f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 407f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 408f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CS->getLHS()->getLocStart(), 409f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 4106c36be5b383875b490684bcf439d6d427298c1afChris Lattner 4111e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 4121e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 4131e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner ImpCastExprToType(Lo, CondType); 4141e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 4151e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner 416b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 417dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()) { 418dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CS->getRHS()->isTypeDependent() || 419dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CS->getRHS()->isValueDependent()) { 420dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HasDependentValue = true; 421dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor break; 422dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 423f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 424dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } else 425b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 426f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 427f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 428b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 429dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!HasDependentValue) { 430dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the scalar case values so we can easily detect duplicates. 431dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 432dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 433dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseVals.empty()) { 434dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseVals.size()-1; i != e; ++i) { 435dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CaseVals[i].first == CaseVals[i+1].first) { 436dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 437dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CaseVals[i+1].second->getLHS()->getLocStart(), 438dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::err_duplicate_case) << CaseVals[i].first.toString(10); 439dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CaseVals[i].second->getLHS()->getLocStart(), 440dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 441390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 442390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 443dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 444dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 4456efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 446b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 447dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 448dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Detect duplicate case ranges, which usually don't exist at all in 449dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // the first place. 450dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (!CaseRanges.empty()) { 451dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Sort all the case ranges by their low value so we can easily detect 452dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // overlaps between ranges. 453dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 4540471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 455dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Scan the ranges, computing the high values and removing empty ranges. 456dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor std::vector<llvm::APSInt> HiVals; 457dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 458dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 459dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Expr *Hi = CR->getRHS(); 460dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 461dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 462dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Convert the value to the same width/sign as the condition. 463dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 464dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->getRHS()->getLocStart(), 465dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::warn_case_value_overflow); 466dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 467dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the LHS is not the same type as the condition, insert an implicit 468dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // cast. 469dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor ImpCastExprToType(Hi, CondType); 470dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->setRHS(Hi); 471dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 472dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If the low value is bigger than the high value, the case is empty. 473dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (CaseRanges[i].first > HiVal) { 474dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 475dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << SourceRange(CR->getLHS()->getLocStart(), 476dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CR->getRHS()->getLocEnd()); 477dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseRanges.erase(CaseRanges.begin()+i); 478dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor --i, --e; 479dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor continue; 480dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 481dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor HiVals.push_back(HiVal); 4820471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 483b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 484dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Rescan the ranges, looking for overlap with singleton values and other 485dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges. Since the range list is sorted, we only need to compare case 486dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // ranges with their neighbors. 487dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 488dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRLo = CaseRanges[i].first; 489dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt &CRHi = HiVals[i]; 490dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *CR = CaseRanges[i].second; 491dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 492dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see whether the case range overlaps with any 493dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // singleton cases. 494dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseStmt *OverlapStmt = 0; 495dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor llvm::APSInt OverlapVal(32); 496dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 497dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value >= the lower bound. If I is in the 498dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range, then we have overlap. 499dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 500dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseVals.end(), CRLo, 501dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseCompareFunctor()); 502dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.end() && I->first < CRHi) { 503dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = I->first; // Found overlap with scalar. 504dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = I->second; 505dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 506dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 507dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Find the smallest value bigger than the upper bound. 508dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 509dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 510dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = (I-1)->first; // Found overlap with scalar. 511dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = (I-1)->second; 512dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 513dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 514dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // Check to see if this case stmt overlaps with the subsequent 515dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // case range. 516dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (i && CRLo <= HiVals[i-1]) { 517dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapVal = HiVals[i-1]; // Found overlap with range. 518dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor OverlapStmt = CaseRanges[i-1].second; 519dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 520dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 521dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor if (OverlapStmt) { 522dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor // If we have a duplicate, report it. 523dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 524dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor << OverlapVal.toString(10); 525dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor Diag(OverlapStmt->getLHS()->getLocStart(), 526dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor diag::note_duplicate_case_prev); 527390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: We really want to remove the bogus case stmt from the 528390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // substmt, but we have no way to do this right now. 529dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor CaseListIsErroneous = true; 530dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor } 5310471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 532b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 533b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 534dbb26db1d426fb6caaaf1b4fa47b46d1947c12c9Douglas Gregor 535390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // FIXME: If the case list was broken is some way, we don't have a good system 536390b4cc8b45a05612349269ef08faab3e4688f06Mike Stump // to patch it up. Instead, just return the whole substmt as broken. 537b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 538de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 539de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 540de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Switch.release(); 541de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 5425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 544f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 5457f537c18c7029e73f0bd555be3782c066e7e2c1eAnders CarlssonSema::ActOnWhileStmt(SourceLocation WhileLoc, FullExprArg Cond, StmtArg Body) { 5467f537c18c7029e73f0bd555be3782c066e7e2c1eAnders Carlsson ExprArg CondArg(Cond.release()); 5477f537c18c7029e73f0bd555be3782c066e7e2c1eAnders Carlsson Expr *condExpr = CondArg.takeAs<Expr>(); 5481b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnWhileStmt(): missing expression"); 549f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 5504a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor if (!condExpr->isTypeDependent()) { 5514a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor DefaultFunctionArrayConversion(condExpr); 5527f537c18c7029e73f0bd555be3782c066e7e2c1eAnders Carlsson CondArg = condExpr; 5534a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor QualType condType = condExpr->getType(); 5544a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor 5554a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor if (getLangOptions().CPlusPlus) { 5564a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 5574a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor return StmtError(); 5584a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor } else if (!condType->isScalarType()) // C99 6.8.5p2 5594a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor return StmtError(Diag(WhileLoc, 5604a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor diag::err_typecheck_statement_requires_scalar) 5614a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor << condType << condExpr->getSourceRange()); 5624a2e2041edc63db687677325e113b39b9d123c40Douglas Gregor } 5635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5647f537c18c7029e73f0bd555be3782c066e7e2c1eAnders Carlsson CondArg.release(); 565e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson return Owned(new (Context) WhileStmt(condExpr, Body.takeAs<Stmt>(), 5668189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek WhileLoc)); 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 569f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 570f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnDoStmt(SourceLocation DoLoc, StmtArg Body, 571989135901c750af61ef012b6b0a0368be415bc46Chris Lattner SourceLocation WhileLoc, SourceLocation CondLParen, 572989135901c750af61ef012b6b0a0368be415bc46Chris Lattner ExprArg Cond, SourceLocation CondRParen) { 573e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Expr *condExpr = Cond.takeAs<Expr>(); 5741b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnDoStmt(): missing expression"); 575f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 5769f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor if (!condExpr->isTypeDependent()) { 5779f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor DefaultFunctionArrayConversion(condExpr); 5789f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor Cond = condExpr; 5799f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor QualType condType = condExpr->getType(); 5809f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor 5819f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor if (getLangOptions().CPlusPlus) { 5829f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 5839f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor return StmtError(); 5849f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor } else if (!condType->isScalarType()) // C99 6.8.5p2 5859f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor return StmtError(Diag(DoLoc, 5869f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor diag::err_typecheck_statement_requires_scalar) 5879f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor << condType << condExpr->getSourceRange()); 5889f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor } 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 590f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond.release(); 5919f3ca2a7747bd47f14d7693f333103fac29a24d2Douglas Gregor return Owned(new (Context) DoStmt(Body.takeAs<Stmt>(), condExpr, DoLoc, 592989135901c750af61ef012b6b0a0368be415bc46Chris Lattner WhileLoc, CondRParen)); 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 595f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 596f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 597f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl StmtArg first, ExprArg second, ExprArg third, 598f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation RParenLoc, StmtArg body) { 599f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *First = static_cast<Stmt*>(first.get()); 600f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Second = static_cast<Expr*>(second.get()); 601f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Third = static_cast<Expr*>(third.get()); 602f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *Body = static_cast<Stmt*>(body.get()); 603f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 6045921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 6055921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 606f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 607f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 608f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 6095921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 6105921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 6115921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 6125921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD && VD->isBlockVarDecl() && !VD->hasLocalStorage()) 6135921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 6145921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 6155921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 6165921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 6175921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 618ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6205831c6a1efc47e6a19d82fe3dd25b5b8fef6979dDouglas Gregor if (Second && !Second->isTypeDependent()) { 62136c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner DefaultFunctionArrayConversion(Second); 62236c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner QualType SecondType = Second->getType(); 623f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 6245921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 6255921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (CheckCXXBooleanCondition(Second)) // C++ 6.4p4 626f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(); 6275921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else if (!SecondType->isScalarType()) // C99 6.8.5p2 628f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(ForLoc, 629f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_typecheck_statement_requires_scalar) 630f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << SecondType << Second->getSourceRange()); 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 632f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl first.release(); 633f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl second.release(); 634f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl third.release(); 635f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl body.release(); 6365831c6a1efc47e6a19d82fe3dd25b5b8fef6979dDouglas Gregor return Owned(new (Context) ForStmt(First, Second, Third, Body, ForLoc, 6375831c6a1efc47e6a19d82fe3dd25b5b8fef6979dDouglas Gregor LParenLoc, RParenLoc)); 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 640f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 641f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 642f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 643f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl StmtArg first, ExprArg second, 644f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation RParenLoc, StmtArg body) { 645f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *First = static_cast<Stmt*>(first.get()); 646f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Second = static_cast<Expr*>(second.get()); 647f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *Body = static_cast<Stmt*>(body.get()); 64820552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 64920552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 65020552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 6517e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 652f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 653f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 654f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 6557e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner Decl *D = DS->getSingleDecl(); 656f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek FirstType = cast<ValueDecl>(D)->getType(); 657f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 658f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 659f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 660248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff VarDecl *VD = cast<VarDecl>(D); 661248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff if (VD->isBlockVarDecl() && !VD->hasLocalStorage()) 662f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(VD->getLocation(), 663f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 6641fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 665810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (cast<Expr>(First)->isLvalue(Context) != Expr::LV_Valid) 666f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 667f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 668f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 6691fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 670f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl FirstType = static_cast<Expr*>(First)->getType(); 6711fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 672b6ccaac65ca72f72954eb3893bbd940bedd23f00Ted Kremenek if (!Context.isObjCObjectPointerType(FirstType)) 673dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 674d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 6753ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 6763ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian if (Second) { 6773ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian DefaultFunctionArrayConversion(Second); 6783ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian QualType SecondType = Second->getType(); 679b6ccaac65ca72f72954eb3893bbd940bedd23f00Ted Kremenek if (!Context.isObjCObjectPointerType(SecondType)) 680dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_collection_expr_type) 681d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 6823ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 683f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl first.release(); 684f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl second.release(); 685f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl body.release(); 6868189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 6878189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 6883ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 6895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6904cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 6911b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnGotoStmt(SourceLocation GotoLoc, SourceLocation LabelLoc, 6925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *LabelII) { 6934eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If we are in a block, reject all gotos for now. 6944eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock) 6954cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(GotoLoc, diag::err_goto_in_block)); 6964eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 698ea29a3a0d6948c4a51a261d19ec1a585d2a9c779Chris Lattner LabelStmt *&LabelDecl = getLabelMap()[LabelII]; 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 700caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff // If we haven't seen this label yet, create a forward reference. 701caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff if (LabelDecl == 0) 7028189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek LabelDecl = new (Context) LabelStmt(LabelLoc, LabelII, 0); 7034cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7048189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) GotoStmt(LabelDecl, GotoLoc, LabelLoc)); 7055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7074cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 708ad56d684259f706b7c0ae5ad9c23adb4f2926817Chris LattnerSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc, SourceLocation StarLoc, 7094cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl ExprArg DestExp) { 710bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 71133083823342649b1fccec856c1f239c09fc0d7e1Eli Friedman Expr* E = DestExp.takeAs<Expr>(); 7125f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (!E->isTypeDependent()) { 7135f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor QualType ETy = E->getType(); 7145f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor AssignConvertType ConvTy = 7155f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor CheckSingleAssignmentConstraints(Context.VoidPtrTy, E); 7165f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor if (DiagnoseAssignmentResult(ConvTy, StarLoc, Context.VoidPtrTy, ETy, 7175f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor E, "passing")) 7185f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return StmtError(); 7195f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor } 7205f1b9e689fa5c101512aef99225f2afea1673449Douglas Gregor return Owned(new (Context) IndirectGotoStmt(GotoLoc, StarLoc, E)); 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7234cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7241b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 7255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 7265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 7275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 7284cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 7295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7304cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7318189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 7325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7344cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7351b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 7365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 7375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 7385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 7394cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 7405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7414cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7428189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 7435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 74527c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 7464eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 7474cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7484eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 7494eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 7504eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 7514eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType == 0) { 752c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 75316564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 75416564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 75516564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff DefaultFunctionArrayConversion(RetValExp); 7564eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff CurBlock->ReturnType = RetValExp->getType().getTypePtr(); 757c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 7584eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff CurBlock->ReturnType = Context.VoidTy.getTypePtr(); 7594eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 76098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump QualType FnRetType = QualType(CurBlock->ReturnType, 0); 7614cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7626c92fa75e62937f9738696840efcb258560f4568Mike Stump if (CurBlock->TheDecl->hasAttr<NoReturnAttr>()) { 7636c92fa75e62937f9738696840efcb258560f4568Mike Stump Diag(ReturnLoc, diag::err_noreturn_block_has_return_expr) 7646c92fa75e62937f9738696840efcb258560f4568Mike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 7656c92fa75e62937f9738696840efcb258560f4568Mike Stump return StmtError(); 7666c92fa75e62937f9738696840efcb258560f4568Mike Stump } 7676c92fa75e62937f9738696840efcb258560f4568Mike Stump 7684eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 7694eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 7704eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 7714eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 7724eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) { 7734eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 7748189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek RetValExp->Destroy(Context); 7754eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 7764eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7778189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 7784eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7794cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7804cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl if (!RetValExp) 7814cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 7824cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 78398eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 78498eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // we have a non-void block with an expression, continue checking 78598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump QualType RetValType = RetValExp->getType(); 78698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 78798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // C99 6.8.6.4p3(136): The return statement is not an assignment. The 78898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // overlap restriction of subclause 6.5.16.1 does not apply to the case of 78998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // function return. 7904cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 79198eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // In C++ the return statement is handled via a copy initialization. 79298eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // the C version of which boils down to CheckSingleAssignmentConstraints. 79398eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // FIXME: Leaks RetValExp. 79498eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (PerformCopyInitialization(RetValExp, FnRetType, "returning")) 79598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump return StmtError(); 79698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 79798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (RetValExp) CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 79898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 7994cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 8008189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 8014eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 8025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 803e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl/// IsReturnCopyElidable - Whether returning @p RetExpr from a function that 804e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl/// returns a @p RetType fulfills the criteria for copy elision (C++0x 12.8p15). 805e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redlstatic bool IsReturnCopyElidable(ASTContext &Ctx, QualType RetType, 806e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl Expr *RetExpr) { 807e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl QualType ExprType = RetExpr->getType(); 808e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // - in a return statement in a function with ... 809e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // ... a class return type ... 810e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (!RetType->isRecordType()) 811e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 812e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // ... the same cv-unqualified type as the function return type ... 813e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (Ctx.getCanonicalType(RetType).getUnqualifiedType() != 814e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl Ctx.getCanonicalType(ExprType).getUnqualifiedType()) 815e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 816e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // ... the expression is the name of a non-volatile automatic object ... 817e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // We ignore parentheses here. 818e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // FIXME: Is this compliant? 819e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(RetExpr->IgnoreParens()); 820e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (!DR) 821e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 822e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()); 823e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (!VD) 824e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return false; 825e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl return VD->hasLocalStorage() && !VD->getType()->isReferenceType() 826e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl && !VD->getType().isVolatileQualified(); 827e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl} 828e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl 8294cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 830a0ab25d2808fe77ffff54f25a015893791dfd4b6Anders CarlssonSema::ActOnReturnStmt(SourceLocation ReturnLoc, FullExprArg rex) { 831a0ab25d2808fe77ffff54f25a015893791dfd4b6Anders Carlsson Expr *RetValExp = rex->takeAs<Expr>(); 8324eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock) 8334eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 8344cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 835371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 836f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump if (const FunctionDecl *FD = getCurFunctionDecl()) { 837371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 8388662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner if (FD->hasAttr<NoReturnAttr>()) 8398662587fa75d3fb04f873e265841c9314c7f5523Chris Lattner Diag(ReturnLoc, diag::warn_noreturn_function_has_return_expr) 840f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump << getCurFunctionOrMethodDecl()->getDeclName(); 841f7c41dab1a8de29b0991e853b8822bb0d1ddc01cMike Stump } else if (ObjCMethodDecl *MD = getCurMethodDecl()) 842c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff FnRetType = MD->getResultType(); 843c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff else // If we don't have a function/method context, bail. 844c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 845c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff 8465cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 8473c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (RetValExp) {// C99 6.8.6.4p1 (ext_ since GCC warns) 84865ce04bef06696379682410f399f37b43996d824Chris Lattner unsigned D = diag::ext_return_has_expr; 84965ce04bef06696379682410f399f37b43996d824Chris Lattner if (RetValExp->getType()->isVoidType()) 85065ce04bef06696379682410f399f37b43996d824Chris Lattner D = diag::ext_return_has_void_expr; 8514cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 852e878eb035b343d7d819c092102364ec9849716aeChris Lattner // return (some void expression); is legal in C++. 853e878eb035b343d7d819c092102364ec9849716aeChris Lattner if (D != diag::ext_return_has_void_expr || 854e878eb035b343d7d819c092102364ec9849716aeChris Lattner !getLangOptions().CPlusPlus) { 855e878eb035b343d7d819c092102364ec9849716aeChris Lattner NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 856e878eb035b343d7d819c092102364ec9849716aeChris Lattner Diag(ReturnLoc, D) 857e878eb035b343d7d819c092102364ec9849716aeChris Lattner << CurDecl->getDeclName() << isa<ObjCMethodDecl>(CurDecl) 858e878eb035b343d7d819c092102364ec9849716aeChris Lattner << RetValExp->getSourceRange(); 859e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 8605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8618189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 8625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8634cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 86403d77760a5db7990724b6901cea958a673ce0b39Anders Carlsson if (!RetValExp && !FnRetType->isDependentType()) { 8653c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 8663c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 8673c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 8683c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 8693c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 87008631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 8713c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 87208631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 8738189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, (Expr*)0)); 8743c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner } 8754cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 876898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 877898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // we have a non-void function with an expression, continue checking 8784cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 879898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 880898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 8814cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // function return. 8824cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 883e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // C++0x 12.8p15: When certain criteria are met, an implementation is 884e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // allowed to omit the copy construction of a class object, [...] 885e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // - in a return statement in a function with a class return type, when 886e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // the expression is the name of a non-volatile automatic object with 887e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // the same cv-unqualified type as the function return type, the copy 888e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // operation can be omitted [...] 889e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // C++0x 12.8p16: When the criteria for elision of a copy operation are met 890e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // and the object to be copied is designated by an lvalue, overload 891e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // resolution to select the constructor for the copy is first performed 892e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // as if the object were designated by an rvalue. 893e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // Note that we only compute Elidable if we're in C++0x, since we don't 894e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // care otherwise. 895e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl bool Elidable = getLangOptions().CPlusPlus0x ? 896e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl IsReturnCopyElidable(Context, FnRetType, RetValExp) : 897e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl false; 898e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl 899898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // In C++ the return statement is handled via a copy initialization. 9004cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // the C version of which boils down to CheckSingleAssignmentConstraints. 901e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl // FIXME: Leaks RetValExp on error. 902e2b6833d445c7a4ce64f1816c05f176ba1740acaSebastian Redl if (PerformCopyInitialization(RetValExp, FnRetType, "returning", Elidable)) 9034cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(); 9044cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 905898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (RetValExp) CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 906898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 907898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 9088189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 9095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 9105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 911810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 912810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 913810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 914810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 915810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 916810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 917810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 918810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 919810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (E->isLvalue(S.Context) == Expr::LV_Valid) 920810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 921810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 922810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 923810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 924810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 925810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (E != E2 && E2->isLvalue(S.Context) == Expr::LV_Valid) { 926810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (!S.getLangOptions().HeinousExtensions) 927810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 928810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 929810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 930810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 931810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 932810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 933810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 934810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 935810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 936810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 937810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 938810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 939810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 940810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 9413037ed0a27dba62e522304183718efc149e8b6d9Sebastian RedlSema::OwningStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, 9423037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsSimple, 9433037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsVolatile, 9443037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumOutputs, 9453037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumInputs, 9463037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl std::string *Names, 9473037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg constraints, 9483037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg exprs, 9493037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl ExprArg asmString, 9503037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg clobbers, 9513037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl SourceLocation RParenLoc) { 9523037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 9533037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 9543037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 9553037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl Expr **Exprs = reinterpret_cast<Expr **>(exprs.get()); 9563037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral *AsmString = cast<StringLiteral>((Expr *)asmString.get()); 9573037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 9583037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 95903eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson llvm::SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 96003eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson 9611708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 9626bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (AsmString->isWide()) 9633037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 9643037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 9653037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9661708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 9671708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 9686bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 9693037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 9703037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 9713037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 972432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner TargetInfo::ConstraintInfo Info(Literal->getStrData(), 9732819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner Literal->getByteLength(), 9742819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner Names[i]); 975432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner if (!Context.Target.validateOutputConstraint(Info)) 9763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 977432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_output_constraint) 978432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 9793037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 980d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 98172056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *OutputExpr = Exprs[i]; 982810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 98372056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(OutputExpr->getLocStart(), 984dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 98572056a237c536ee63285ab0850cb50f299281767Eli Friedman << OutputExpr->getSourceRange()); 98604728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 98703eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson 98844def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner OutputConstraintInfos.push_back(Info); 98904728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 9903037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 991806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner llvm::SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 992806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 99304728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 9941708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 9956bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 9963037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 9973037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 9983037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 999432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner TargetInfo::ConstraintInfo Info(Literal->getStrData(), 10002819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner Literal->getByteLength(), 10012819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner Names[i]); 1002beaaccd8e2a8748f77b66e2b330fb9136937e14cJay Foad if (!Context.Target.validateInputConstraint(OutputConstraintInfos.data(), 10032819fa85651526d59ade4fdc9da2cadd7b132973Chris Lattner NumOutputs, Info)) { 10043037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 1005432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner diag::err_asm_invalid_input_constraint) 1006432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr()); 1007d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 10083037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 100972056a237c536ee63285ab0850cb50f299281767Eli Friedman Expr *InputExpr = Exprs[i]; 10103037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 1011d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 101244def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsMemory() && !Info.allowsRegister()) { 1013810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 101472056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1015d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 1016432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << Info.getConstraintStr() 101772056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 101804728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 10193037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 102044def070435a2b5d67f0534f7a3a85a7389d60f2Chris Lattner if (Info.allowsRegister()) { 1021d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 102272056a237c536ee63285ab0850cb50f299281767Eli Friedman return StmtError(Diag(InputExpr->getLocStart(), 1023d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 1024432c86969eced2ce658b3f3f2aa7407c8864f21bChris Lattner << InputExpr->getType() << Info.getConstraintStr() 102572056a237c536ee63285ab0850cb50f299281767Eli Friedman << InputExpr->getSourceRange()); 1026d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 1027d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 10286032979a5d091e5607c7c467400449727d9beb5aAnders Carlsson 10296032979a5d091e5607c7c467400449727d9beb5aAnders Carlsson DefaultFunctionArrayConversion(Exprs[i]); 103049ac88166d36f8c436780694f2ce955acde87c6aChris Lattner 1031806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner InputConstraintInfos.push_back(Info); 103204728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 10333037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 10346fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 10351708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 10361708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 10376bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 10383037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 10393037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 10403037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 10413037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl llvm::SmallString<16> Clobber(Literal->getStrData(), 10423037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl Literal->getStrData() + 10436fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson Literal->getByteLength()); 10443037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 10456bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (!Context.Target.isValidGCCRegisterName(Clobber.c_str())) 10463037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 10473037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl diag::err_asm_unknown_register_name) << Clobber.c_str()); 10486fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 10493037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 10503037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl constraints.release(); 10513037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl exprs.release(); 10523037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl asmString.release(); 10533037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl clobbers.release(); 1054fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 1055fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner new (Context) AsmStmt(AsmLoc, IsSimple, IsVolatile, NumOutputs, NumInputs, 1056fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner Names, Constraints, Exprs, AsmString, NumClobbers, 1057fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner Clobbers, RParenLoc); 1058fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 1059fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 1060fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner llvm::SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 1061fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 1062fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 10632ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 10642ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 1065fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner DeleteStmt(NS); 1066fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 1067fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 1068fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner 1069806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // Validate tied input operands for type mismatches. 1070806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 1071806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 1072806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 1073806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // If this is a tied constraint, verify that the output and input have 1074806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // either exactly the same type, or that they are int/ptr operands with the 1075806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner // same size (int/long, int*/long, are ok etc). 1076806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner if (!Info.hasTiedOperand()) continue; 1077806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 1078806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner unsigned TiedTo = Info.getTiedOperand(); 1079f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner Expr *OutputExpr = Exprs[TiedTo]; 1080c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Expr *InputExpr = Exprs[i+NumOutputs]; 10817adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType InTy = InputExpr->getType(); 10827adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner QualType OutTy = OutputExpr->getType(); 10837adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if (Context.hasSameType(InTy, OutTy)) 1084806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; // All types can be tied to themselves. 1085806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 10867adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // Int/ptr operands have some special cases that we allow. 10877adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner if ((OutTy->isIntegerType() || OutTy->isPointerType()) && 10887adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner (InTy->isIntegerType() || InTy->isPointerType())) { 10897adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner 10907adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // They are ok if they are the same size. Tying void* to int is ok if 10917adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // they are the same size, for example. This also allows tying void* to 10927adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner // int*. 10933351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner uint64_t OutSize = Context.getTypeSize(OutTy); 10943351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner uint64_t InSize = Context.getTypeSize(InTy); 10953351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (OutSize == InSize) 1096806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner continue; 1097f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner 10983351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If the smaller input/output operand is not mentioned in the asm string, 10993351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // then we can promote it and the asm string won't notice. Check this 1100f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner // case now. 11013351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner bool SmallerValueMentioned = false; 110258bce89d12b1dfba16637ce3754d6cb24c3099bbChris Lattner for (unsigned p = 0, e = Pieces.size(); p != e; ++p) { 110358bce89d12b1dfba16637ce3754d6cb24c3099bbChris Lattner AsmStmt::AsmStringPiece &Piece = Pieces[p]; 110458bce89d12b1dfba16637ce3754d6cb24c3099bbChris Lattner if (!Piece.isOperand()) continue; 11053351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 11063351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If this is a reference to the input and if the input was the smaller 11073351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // one, then we have to reject this asm. 11083351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (Piece.getOperandNo() == i+NumOutputs) { 11093351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (InSize < OutSize) { 11103351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner SmallerValueMentioned = true; 11113351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner break; 11123351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 11133351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 11143351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner 11153351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If this is a reference to the input and if the input was the smaller 11163351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // one, then we have to reject this asm. 11173351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (Piece.getOperandNo() == TiedTo) { 11183351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (InSize > OutSize) { 11193351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner SmallerValueMentioned = true; 11203351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner break; 11213351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 11223351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner } 1123f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner } 1124f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner 11253351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // If the smaller value wasn't mentioned in the asm string, and if the 11263351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // output was a register, just extend the shorter one to the size of the 11273351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner // larger one. 11283351f1145aa91ddd8022fcd3ca16c219db9e8277Chris Lattner if (!SmallerValueMentioned && 1129f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner OutputConstraintInfos[TiedTo].allowsRegister()) 1130f69fcaeb3843297757251a19f0a6f5bbffed7f32Chris Lattner continue; 1131806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 1132806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner 1133c1f3b28004a032f4cd13721d4d884c6dcec29c31Chris Lattner Diag(InputExpr->getLocStart(), 1134806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner diag::err_asm_tying_incompatible_types) 11357adaa18ef3be65971cd41cc61dd739baeb02af10Chris Lattner << InTy << OutTy << OutputExpr->getSourceRange() 1136806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner << InputExpr->getSourceRange(); 1137806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner DeleteStmt(NS); 1138806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner return StmtError(); 1139806503f8c839d7f5ebf3fbf7ee848c179be76dd2Chris Lattner } 1140fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner 1141fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 1142fe795956194141c91ae555985c9b930595bff43fChris Lattner} 11433b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 1144431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1145431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 1146b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner SourceLocation RParen, DeclPtrTy Parm, 1147431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg Body, StmtArg catchList) { 1148f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Stmt *CatchList = catchList.takeAs<Stmt>(); 1149b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner ParmVarDecl *PVD = cast_or_null<ParmVarDecl>(Parm.getAs<Decl>()); 1150f50cb369273c6bd26c9629df92ee53f1d8af4149Steve Naroff 1151f50cb369273c6bd26c9629df92ee53f1d8af4149Steve Naroff // PVD == 0 implies @catch(...). 11529d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff if (PVD) { 115393c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner // If we already know the decl is invalid, reject it. 115493c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner if (PVD->isInvalidDecl()) 115593c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner return StmtError(); 115693c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner 11579d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff if (!Context.isObjCObjectPointerType(PVD->getType())) 11589d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff return StmtError(Diag(PVD->getLocation(), 11599d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff diag::err_catch_param_not_objc_type)); 11609d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff if (PVD->getType()->isObjCQualifiedIdType()) 11619d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff return StmtError(Diag(PVD->getLocation(), 1162d198abae5938262e501a409e833bf01ca8b8253eSteve Naroff diag::err_illegal_qualifiers_on_catch_parm)); 11639d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff } 116493c4945c9ead2d374fe3fc528e3017c7167265beChris Lattner 11658189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ObjCAtCatchStmt *CS = new (Context) ObjCAtCatchStmt(AtLoc, RParen, 1166e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson PVD, Body.takeAs<Stmt>(), CatchList); 1167431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl return Owned(CatchList ? CatchList : CS); 11683b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 11693b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 1170431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1171431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, StmtArg Body) { 11728189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, 11738189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(Body.release()))); 1174161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 1175bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1176431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1177431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, 1178431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg Try, StmtArg Catch, StmtArg Finally) { 117938c5ebd7b1b65304c7b5c7b9bf3f9162df22e77dChris Lattner CurFunctionNeedsScopeChecking = true; 1180e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson return Owned(new (Context) ObjCAtTryStmt(AtLoc, Try.takeAs<Stmt>(), 1181e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Catch.takeAs<Stmt>(), 1182e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson Finally.takeAs<Stmt>())); 1183bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 1184bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1185431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 11863dcfe10a6801eb52f4c20f1242bea0a3a98aa146Steve NaroffSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, ExprArg expr,Scope *CurScope) { 1187f1b1d59a3f0650ab97b04235a14ae4549ca1c656Anders Carlsson Expr *ThrowExpr = expr.takeAs<Expr>(); 11887151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!ThrowExpr) { 1189e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 1190e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 1191e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 1192e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 1193e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 1194e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 11954ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 11967151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } else { 11977151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff QualType ThrowType = ThrowExpr->getType(); 11987151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff // Make sure the expression type is an ObjC pointer or "void *". 11997151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!Context.isObjCObjectPointerType(ThrowType)) { 12007151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff const PointerType *PT = ThrowType->getAsPointerType(); 12017151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!PT || !PT->getPointeeType()->isVoidType()) 12024ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 12034ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff << ThrowExpr->getType() << ThrowExpr->getSourceRange()); 12047151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } 12057151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } 12067151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff return Owned(new (Context) ObjCAtThrowStmt(AtLoc, ThrowExpr)); 120739f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 1208bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1209431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1210431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, ExprArg SynchExpr, 1211431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg SynchBody) { 121246c3c4ba78766ac0f1c5ec631b424773e21f5271Chris Lattner CurFunctionNeedsScopeChecking = true; 121346c3c4ba78766ac0f1c5ec631b424773e21f5271Chris Lattner 1214a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner // Make sure the expression type is an ObjC pointer or "void *". 1215a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner Expr *SyncExpr = static_cast<Expr*>(SynchExpr.get()); 1216a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner if (!Context.isObjCObjectPointerType(SyncExpr->getType())) { 1217a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner const PointerType *PT = SyncExpr->getType()->getAsPointerType(); 1218a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner if (!PT || !PT->getPointeeType()->isVoidType()) 1219a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner return StmtError(Diag(AtLoc, diag::error_objc_synchronized_expects_object) 1220a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner << SyncExpr->getType() << SyncExpr->getSourceRange()); 1221a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner } 1222a868a203a18571d091e5d226f5f100d4440f3d94Chris Lattner 1223e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, 1224e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson SynchExpr.takeAs<Stmt>(), 1225e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson SynchBody.takeAs<Stmt>())); 1226fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 12274b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 12284b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 12294b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 12304b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian RedlAction::OwningStmtResult 1231b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris LattnerSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, DeclPtrTy ExDecl, 12324b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl StmtArg HandlerBlock) { 12334b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 12348189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 1235b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner cast_or_null<VarDecl>(ExDecl.getAs<Decl>()), 1236e9146f2e9f1c4e281544e8c080934c72d41012caAnders Carlsson HandlerBlock.takeAs<Stmt>())); 12374b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 12388351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 12398351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 12408351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 12418351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlAction::OwningStmtResult 12428351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlSema::ActOnCXXTryBlock(SourceLocation TryLoc, StmtArg TryBlock, 12438351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 12448351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 12458351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 12468351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 12478351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl Stmt **Handlers = reinterpret_cast<Stmt**>(RawHandlers.get()); 12488351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 12498351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl for(unsigned i = 0; i < NumHandlers - 1; ++i) { 12508351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl CXXCatchStmt *Handler = llvm::cast<CXXCatchStmt>(Handlers[i]); 12518351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl if (!Handler->getExceptionDecl()) 12528351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl return StmtError(Diag(Handler->getLocStart(), diag::err_early_catch_all)); 12538351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 12548351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers for the same type as an earlier one. 12558351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // This one is rather easy. 12568351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 12578351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 12588351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 12598351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 12608351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 12618351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 1262972041f45bdf8df7ea447221292d7827466ba94bSebastian Redl CurFunctionNeedsScopeChecking = true; 12638351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl RawHandlers.release(); 12648189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXTryStmt(TryLoc, 12658189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(TryBlock.release()), 12668189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek Handlers, NumHandlers)); 12678351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 1268