SemaStmt.cpp revision e21dd6ffef4585fa43cd3586ed971217d65bf56c
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" 198189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek#include "clang/AST/ASTContext.h" 206fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson#include "clang/Basic/TargetInfo.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 23a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian RedlSema::OwningStmtResult Sema::ActOnExprStmt(ExprArg expr) { 24a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Expr *E = static_cast<Expr*>(expr.release()); 251b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(E && "ActOnExprStmt(): missing expression"); 26a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 27834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // C99 6.8.3p2: The expression in an expression statement is evaluated as a 28834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // void expression for its side effects. Conversion to void allows any 29834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // operand, even incomplete types. 30a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 31834a72ac74cf4ff07ba6215545dba3db578f8a07Chris Lattner // Same thing in for stmt first clause (when expr) and third clause. 32a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(static_cast<Stmt*>(E)); 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 36a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian RedlSema::OwningStmtResult Sema::ActOnNullStmt(SourceLocation SemiLoc) { 378189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) NullStmt(SemiLoc)); 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 40a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian RedlSema::OwningStmtResult Sema::ActOnDeclStmt(DeclTy *decl, 41a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl SourceLocation StartLoc, 42a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl SourceLocation EndLoc) { 4381c018d9482e7cc2addadc6202dcf162a01faefdChris Lattner if (decl == 0) 44a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return StmtError(); 45a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 464afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = static_cast<Decl *>(decl); 47a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 488ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek // This is a temporary hack until we are always passing around 498ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek // DeclGroupRefs. 508ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek llvm::SmallVector<Decl*, 10> decls; 514afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor while (D) { 524afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl* d = D; 534afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor D = D->getNextDeclarator(); 548ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek d->setNextDeclarator(0); 558ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek decls.push_back(d); 568ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek } 578ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek 588ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek assert (!decls.empty()); 59a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 608ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek if (decls.size() == 1) { 618ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek DeclGroupOwningRef DG(*decls.begin()); 628189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) DeclStmt(DG, StartLoc, EndLoc)); 638ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek } 648ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek else { 6508631c5fa053867146b5ee8be658c229f6bf127cChris Lattner DeclGroupOwningRef DG(DeclGroup::Create(Context, decls.size(), &decls[0])); 668189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) DeclStmt(DG, StartLoc, EndLoc)); 678ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek } 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 70a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian RedlAction::OwningStmtResult 711b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 72a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 73a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 74a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 75c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 76c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 77c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus) { 78c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 79c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 80c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 81c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 82c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 83c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 84c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 85c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 86c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 87c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 88c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 894afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 90c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 91c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 92c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 9398414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 9498414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 9598414c1b7d1944a57156d52e29bd41c005de09acChris Lattner Expr *E = dyn_cast<Expr>(Elts[i]); 9698414c1b7d1944a57156d52e29bd41c005de09acChris Lattner if (!E) continue; 9798414c1b7d1944a57156d52e29bd41c005de09acChris Lattner 9898414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about expressions with unused results. 9998414c1b7d1944a57156d52e29bd41c005de09acChris Lattner if (E->hasLocalSideEffect() || E->getType()->isVoidType()) 10098414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 10198414c1b7d1944a57156d52e29bd41c005de09acChris Lattner 10298414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // The last expr in a stmt expr really is used. 10398414c1b7d1944a57156d52e29bd41c005de09acChris Lattner if (isStmtExpr && i == NumElts-1) 10498414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 10598414c1b7d1944a57156d52e29bd41c005de09acChris Lattner 10698414c1b7d1944a57156d52e29bd41c005de09acChris Lattner /// DiagnoseDeadExpr - This expression is side-effect free and evaluated in 10798414c1b7d1944a57156d52e29bd41c005de09acChris Lattner /// a context where the result is unused. Emit a diagnostic to warn about 10898414c1b7d1944a57156d52e29bd41c005de09acChris Lattner /// this. 10998414c1b7d1944a57156d52e29bd41c005de09acChris Lattner if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) 110fa25bbb351f4fdd977f51254119cdfc2b525ce90Chris Lattner Diag(BO->getOperatorLoc(), diag::warn_unused_expr) 111fa25bbb351f4fdd977f51254119cdfc2b525ce90Chris Lattner << BO->getLHS()->getSourceRange() << BO->getRHS()->getSourceRange(); 11298414c1b7d1944a57156d52e29bd41c005de09acChris Lattner else if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) 113fa25bbb351f4fdd977f51254119cdfc2b525ce90Chris Lattner Diag(UO->getOperatorLoc(), diag::warn_unused_expr) 114fa25bbb351f4fdd977f51254119cdfc2b525ce90Chris Lattner << UO->getSubExpr()->getSourceRange(); 115a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl else 116fa25bbb351f4fdd977f51254119cdfc2b525ce90Chris Lattner Diag(E->getExprLoc(), diag::warn_unused_expr) << E->getSourceRange(); 11798414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 118a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 1198189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 122117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlAction::OwningStmtResult 123117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlSema::ActOnCaseStmt(SourceLocation CaseLoc, ExprArg lhsval, 124117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl SourceLocation DotDotDotLoc, ExprArg rhsval, 125117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl SourceLocation ColonLoc, StmtArg subStmt) { 126117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Stmt *SubStmt = static_cast<Stmt*>(subStmt.release()); 127117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl assert((lhsval.get() != 0) && "missing expression in case statement"); 128117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.4.2p3: The expression shall be an integer constant. 13051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // However, GCC allows any evaluatable integer expression. 131d3a61d5ec5357d19b7c0b6b599231e68dc5e237fAnders Carlsson 132117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Expr *LHSVal = static_cast<Expr*>(lhsval.get()); 133d3a61d5ec5357d19b7c0b6b599231e68dc5e237fAnders Carlsson if (VerifyIntegerConstantExpression(LHSVal)) 134117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1366c36be5b383875b490684bcf439d6d427298c1afChris Lattner // GCC extension: The expression shall be an integer constant. 137117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 138117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Expr *RHSVal = static_cast<Expr*>(rhsval.get()); 139117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl if (RHSVal && VerifyIntegerConstantExpression(RHSVal)) { 140f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner RHSVal = 0; // Recover by just forgetting about it. 141117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl rhsval = 0; 142117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl } 143117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1448a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner if (SwitchStack.empty()) { 1458a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner Diag(CaseLoc, diag::err_case_not_in_switch); 146117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 1478a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 149117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl // Only now release the smart pointers. 150117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl lhsval.release(); 151117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl rhsval.release(); 1528189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, SubStmt, CaseLoc); 1538a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner SwitchStack.back()->addSwitchCase(CS); 154117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 157117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlAction::OwningStmtResult 1581b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 159117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl StmtArg subStmt, Scope *CurScope) { 160117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Stmt *SubStmt = static_cast<Stmt*>(subStmt.release()); 161117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1628a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner if (SwitchStack.empty()) { 1630fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 164117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 1650fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 166117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1678189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, SubStmt); 1688a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner SwitchStack.back()->addSwitchCase(DS); 169117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 172de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 1731b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II, 174de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl SourceLocation ColonLoc, StmtArg subStmt) { 175de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Stmt *SubStmt = static_cast<Stmt*>(subStmt.release()); 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelStmt *&LabelDecl = LabelMap[II]; 178de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If not forward referenced or defined already, just create a new LabelStmt. 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LabelDecl == 0) 1818189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(LabelDecl = new (Context) LabelStmt(IdentLoc, II, SubStmt)); 182de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(LabelDecl->getID() == II && "Label mismatch!"); 184de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was either forward reference or multiply defined. If 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // multiply defined, reject it now. 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LabelDecl->getSubStmt()) { 18808631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << LabelDecl->getID(); 1895f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(LabelDecl->getIdentLoc(), diag::note_previous_definition); 190de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 192de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was forward declared, and we just found its real 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // definition. Fill in the forward definition and return it. 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelDecl->setIdentLoc(IdentLoc); 1960fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner LabelDecl->setSubStmt(SubStmt); 197de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(LabelDecl); 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 200de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 201de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlSema::ActOnIfStmt(SourceLocation IfLoc, ExprArg CondVal, 202de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg ThenVal, SourceLocation ElseLoc, 203de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg ElseVal) { 204de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Expr *condExpr = (Expr *)CondVal.release(); 205de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2061b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnIfStmt(): missing expression"); 207de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 208c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff DefaultFunctionArrayConversion(condExpr); 209de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl // Take ownership again until we're past the error checking. 210de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl CondVal = condExpr; 211c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff QualType condType = condExpr->getType(); 212de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2135921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 2145921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 215de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 2165921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else if (!condType->isScalarType()) // C99 6.8.4.1p1 217de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(Diag(IfLoc, diag::err_typecheck_statement_requires_scalar) 218de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl << condType << condExpr->getSourceRange()); 219de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 220de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Stmt *thenStmt = (Stmt *)ThenVal.release(); 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2222d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 2232d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 2242d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 2252d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 226de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl if (!ElseVal.get()) { 2272d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 2282d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 2292d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 2302d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 231de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl CondVal.release(); 2328189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) IfStmt(IfLoc, condExpr, thenStmt, 2338189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek (Stmt*)ElseVal.release())); 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 236de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 237de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlSema::ActOnStartOfSwitchStmt(ExprArg cond) { 238de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Expr *Cond = static_cast<Expr*>(cond.release()); 239de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2405921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 2415921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // C++ 6.4.2.p2: 2425921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // The condition shall be of integral type, enumeration type, or of a class 2435921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // type for which a single conversion function to integral or enumeration 2445921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // type exists (12.3). If the condition is of class type, the condition is 2455921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // converted by calling that conversion function, and the result of the 2465921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // conversion is used in place of the original condition for the remainder 2475921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // of this section. Integral promotions are performed. 2485921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis 2495921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis QualType Ty = Cond->getType(); 2505921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis 2515921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: Handle class types. 2525921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis 2535921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // If the type is wrong a diagnostic will be emitted later at 2545921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // ActOnFinishSwitchStmt. 2555921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (Ty->isIntegralType() || Ty->isEnumeralType()) { 2565921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // Integral promotions are performed. 2575921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: Integral promotions for C++ are not complete. 2585921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis UsualUnaryConversions(Cond); 2595921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 2605921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else { 2615921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 2625921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis UsualUnaryConversions(Cond); 2635921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 264de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2658189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek SwitchStmt *SS = new (Context) SwitchStmt(Cond); 266c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SwitchStack.push_back(SS); 267de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 268c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson} 2696c36be5b383875b490684bcf439d6d427298c1afChris Lattner 270f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 271f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 272f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 273f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 274f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 275f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner SourceLocation Loc, 276f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 277f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 278f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 279f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 280f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 281f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.extend(NewWidth); 282f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 283f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If the input was signed and negative and the output is unsigned, 284f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // warn. 285f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (!NewSign && OldVal.isSigned() && OldVal.isNegative()) 286d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << OldVal.toString(10) << Val.toString(10); 287f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 288f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 289f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 290f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 291f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 292f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.trunc(NewWidth); 293b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 294f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.extend(Val.getBitWidth()); 295b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 296f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 297d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 298f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 299f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 300f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 301f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.trunc(NewWidth); 302b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 303f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 304f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 305f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 306f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 307f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 308f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 309f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (Val.isNegative()) // Sign bit changes meaning. 310d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << OldVal.toString(10) << Val.toString(10); 311f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 312f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 313f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3140471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3150471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3160471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3170471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3180471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3190471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3200e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3210e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3220e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3230e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3240471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3250471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3260471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3270471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3280471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3290471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3300471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 331764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 332764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 333764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 334764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 335764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 336764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 337764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 338764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 339764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 340764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 341764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 342764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 343764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 344764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 345de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 346de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, StmtArg Switch, 347de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg Body) { 348de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Stmt *BodyStmt = (Stmt*)Body.release(); 349de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 350c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SwitchStmt *SS = SwitchStack.back(); 351de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl assert(SS == (SwitchStmt*)Switch.get() && "switch stack missing push/pop!"); 352de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 3539dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 354c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SwitchStack.pop_back(); 355c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 356f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 357f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner QualType CondType = CondExpr->getType(); 358de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 359f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (!CondType->isIntegerType()) { // C99 6.8.4.2p1 360d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(SwitchLoc, diag::err_typecheck_statement_requires_integer) 361d162584991885ab004a02573a73ce06422b921fcChris Lattner << CondType << CondExpr->getSourceRange(); 362de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 363c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 364de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 365f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 366f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 36798be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CondWidth = static_cast<unsigned>(Context.getTypeSize(CondType)); 368f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner bool CondIsSigned = CondType->isSignedIntegerType(); 369f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 370f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 371f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 372f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 3730471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner typedef llvm::SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 3740471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 375f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 376f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 377f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRanges; 378f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 379f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 380c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 381b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 382b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 383b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner for (SwitchCase *SC = SS->getSwitchCaseList(); SC; 384c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 385b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 386c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 387f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 388f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 3895f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 390de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 391f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 392f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // we'll return a valid AST. This requires recursing down the 393f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // AST and finding it, not something we are set up to do right now. For 394f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // now, just lop the entire switch stmt out of the AST. 395b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 396c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 397f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 398c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 399f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 400f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 401f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 402f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 403f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 4041e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 40551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 406f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 407f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 408f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 409f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CS->getLHS()->getLocStart(), 410f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 4116c36be5b383875b490684bcf439d6d427298c1afChris Lattner 4121e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 4131e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 4141e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner ImpCastExprToType(Lo, CondType); 4151e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 4161e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner 417b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 418f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (CS->getRHS()) 419f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 420b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner else 421b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 422f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 423f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 424f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 425b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Sort all the scalar case values so we can easily detect duplicates. 426764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 427b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 428f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner if (!CaseVals.empty()) { 429f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner for (unsigned i = 0, e = CaseVals.size()-1; i != e; ++i) { 430f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner if (CaseVals[i].first == CaseVals[i+1].first) { 431f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner // If we have a duplicate, report it. 432f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner Diag(CaseVals[i+1].second->getLHS()->getLocStart(), 433d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner diag::err_duplicate_case) << CaseVals[i].first.toString(10); 434f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner Diag(CaseVals[i].second->getLHS()->getLocStart(), 4355f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner diag::note_duplicate_case_prev); 436f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner // FIXME: We really want to remove the bogus case stmt from the substmt, 437f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner // but we have no way to do this right now. 438f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner CaseListIsErroneous = true; 439f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner } 440b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 441b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 442f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 443b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Detect duplicate case ranges, which usually don't exist at all in the first 444b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // place. 445b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (!CaseRanges.empty()) { 446b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Sort all the case ranges by their low value so we can easily detect 447b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // overlaps between ranges. 4480471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 449b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 450b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Scan the ranges, computing the high values and removing empty ranges. 451b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner std::vector<llvm::APSInt> HiVals; 4526efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 453b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseStmt *CR = CaseRanges[i].second; 4541e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Hi = CR->getRHS(); 45551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 456b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 457b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Convert the value to the same width/sign as the condition. 458b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 459b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CR->getRHS()->getLocStart(), 460b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner diag::warn_case_value_overflow); 461b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 4621e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 4631e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 4641e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner ImpCastExprToType(Hi, CondType); 4651e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CR->setRHS(Hi); 4661e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner 4676efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner // If the low value is bigger than the high value, the case is empty. 4686efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner if (CaseRanges[i].first > HiVal) { 469dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 470dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << SourceRange(CR->getLHS()->getLocStart(), 471dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner CR->getRHS()->getLocEnd()); 4726efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner CaseRanges.erase(CaseRanges.begin()+i); 4736efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner --i, --e; 4746efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner continue; 4756efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 476b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner HiVals.push_back(HiVal); 477b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 478b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 479b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Rescan the ranges, looking for overlap with singleton values and other 4800471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // ranges. Since the range list is sorted, we only need to compare case 4810471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // ranges with their neighbors. 482b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 4830471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner llvm::APSInt &CRLo = CaseRanges[i].first; 4840471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner llvm::APSInt &CRHi = HiVals[i]; 4850471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseStmt *CR = CaseRanges[i].second; 4860471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 4870471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Check to see whether the case range overlaps with any singleton cases. 4880471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseStmt *OverlapStmt = 0; 4890471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner llvm::APSInt OverlapVal(32); 4900471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 4910471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Find the smallest value >= the lower bound. If I is in the case range, 4920471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // then we have overlap. 4930471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 4940471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseVals.end(), CRLo, 4950471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseCompareFunctor()); 4960471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (I != CaseVals.end() && I->first < CRHi) { 4970471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapVal = I->first; // Found overlap with scalar. 4980471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapStmt = I->second; 4990471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 5000471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 5010471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Find the smallest value bigger than the upper bound. 5020471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 5030471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 5040471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapVal = (I-1)->first; // Found overlap with scalar. 5050471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapStmt = (I-1)->second; 5060471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 5070471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 5080471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Check to see if this case stmt overlaps with the subsequent case range. 5090471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (i && CRLo <= HiVals[i-1]) { 5100471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapVal = HiVals[i-1]; // Found overlap with range. 5110471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapStmt = CaseRanges[i-1].second; 5120471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 513b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 5140471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (OverlapStmt) { 5150471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // If we have a duplicate, report it. 516d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 517d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner << OverlapVal.toString(10); 5180471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner Diag(OverlapStmt->getLHS()->getLocStart(), 5195f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner diag::note_duplicate_case_prev); 5200471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // FIXME: We really want to remove the bogus case stmt from the substmt, 5210471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // but we have no way to do this right now. 5220471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseListIsErroneous = true; 5230471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 524b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 525b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 526f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 527b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // FIXME: If the case list was broken is some way, we don't have a good system 528b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // to patch it up. Instead, just return the whole substmt as broken. 529b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 530de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 531de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 532de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Switch.release(); 533de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 5345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 536f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 537f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnWhileStmt(SourceLocation WhileLoc, ExprArg Cond, StmtArg Body) { 538f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *condExpr = (Expr *)Cond.release(); 5391b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnWhileStmt(): missing expression"); 540f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 541c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff DefaultFunctionArrayConversion(condExpr); 542f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond = condExpr; 543c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff QualType condType = condExpr->getType(); 544f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 5455921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 5465921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 547f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(); 5485921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else if (!condType->isScalarType()) // C99 6.8.5p2 549f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(WhileLoc, 550f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_typecheck_statement_requires_scalar) 551f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << condType << condExpr->getSourceRange()); 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 553f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond.release(); 5548189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) WhileStmt(condExpr, (Stmt*)Body.release(), 5558189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek WhileLoc)); 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 558f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 559f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnDoStmt(SourceLocation DoLoc, StmtArg Body, 560f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation WhileLoc, ExprArg Cond) { 561f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *condExpr = (Expr *)Cond.release(); 5621b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnDoStmt(): missing expression"); 563f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 564c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff DefaultFunctionArrayConversion(condExpr); 565f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond = condExpr; 566c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff QualType condType = condExpr->getType(); 567f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 5686314ff264c345b5babb9faf50dad0bc68d7bd74eArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 5696314ff264c345b5babb9faf50dad0bc68d7bd74eArgyrios Kyrtzidis if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 570f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(); 5716314ff264c345b5babb9faf50dad0bc68d7bd74eArgyrios Kyrtzidis } else if (!condType->isScalarType()) // C99 6.8.5p2 572f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(DoLoc, diag::err_typecheck_statement_requires_scalar) 573f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << condType << condExpr->getSourceRange()); 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 575f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond.release(); 5768189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) DoStmt((Stmt*)Body.release(), condExpr, DoLoc)); 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 579f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 580f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 581f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl StmtArg first, ExprArg second, ExprArg third, 582f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation RParenLoc, StmtArg body) { 583f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *First = static_cast<Stmt*>(first.get()); 584f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Second = static_cast<Expr*>(second.get()); 585f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Third = static_cast<Expr*>(third.get()); 586f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *Body = static_cast<Stmt*>(body.get()); 587f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 5885921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 5895921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 590f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 591f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 592f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 5935921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 5945921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 5955921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 5965921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD && VD->isBlockVarDecl() && !VD->hasLocalStorage()) 5975921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 5985921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 5995921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 6005921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 6015921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 602ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 6035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Second) { 60536c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner DefaultFunctionArrayConversion(Second); 60636c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner QualType SecondType = Second->getType(); 607f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 6085921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 6095921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (CheckCXXBooleanCondition(Second)) // C++ 6.4p4 610f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(); 6115921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else if (!SecondType->isScalarType()) // C99 6.8.5p2 612f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(ForLoc, 613f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_typecheck_statement_requires_scalar) 614f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << SecondType << Second->getSourceRange()); 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 616f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl first.release(); 617f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl second.release(); 618f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl third.release(); 619f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl body.release(); 6208189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ForStmt(First, Second, Third, Body, ForLoc)); 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 623f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 624f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 625f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 626f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl StmtArg first, ExprArg second, 627f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation RParenLoc, StmtArg body) { 628f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *First = static_cast<Stmt*>(first.get()); 629f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Second = static_cast<Expr*>(second.get()); 630f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *Body = static_cast<Stmt*>(body.get()); 63120552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 63220552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 63320552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 634f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek if (!DS->hasSolitaryDecl()) 635f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 636f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 637f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 6384afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = DS->getSolitaryDecl(); 639f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek FirstType = cast<ValueDecl>(D)->getType(); 640f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 641f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 642f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 643248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff VarDecl *VD = cast<VarDecl>(D); 644248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff if (VD->isBlockVarDecl() && !VD->hasLocalStorage()) 645f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(VD->getLocation(), 646f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 6471fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 6481fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson Expr::isLvalueResult lval = cast<Expr>(First)->isLvalue(Context); 649f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 6501fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson if (lval != Expr::LV_Valid) 651f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 652f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 653f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 6541fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 655f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl FirstType = static_cast<Expr*>(First)->getType(); 6561fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 657b6ccaac65ca72f72954eb3893bbd940bedd23f00Ted Kremenek if (!Context.isObjCObjectPointerType(FirstType)) 658dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 659d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 6603ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 6613ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian if (Second) { 6623ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian DefaultFunctionArrayConversion(Second); 6633ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian QualType SecondType = Second->getType(); 664b6ccaac65ca72f72954eb3893bbd940bedd23f00Ted Kremenek if (!Context.isObjCObjectPointerType(SecondType)) 665dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_collection_expr_type) 666d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 6673ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 668f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl first.release(); 669f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl second.release(); 670f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl body.release(); 6718189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 6728189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 6733ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 6745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6754cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 6761b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnGotoStmt(SourceLocation GotoLoc, SourceLocation LabelLoc, 6775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *LabelII) { 6784eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If we are in a block, reject all gotos for now. 6794eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock) 6804cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(GotoLoc, diag::err_goto_in_block)); 6814eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelStmt *&LabelDecl = LabelMap[LabelII]; 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we haven't seen this label yet, create a forward reference. 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LabelDecl == 0) 6878189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek LabelDecl = new (Context) LabelStmt(LabelLoc, LabelII, 0); 6884cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 6898189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) GotoStmt(LabelDecl, GotoLoc, LabelLoc)); 6905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6924cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 6931b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc,SourceLocation StarLoc, 6944cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl ExprArg DestExp) { 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: Verify that the operand is convertible to void*. 6964cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 6978189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) IndirectGotoStmt((Expr*)DestExp.release())); 6985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7004cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7011b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 7025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 7035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 7045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 7054cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 7065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7074cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7088189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 7095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7114cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7121b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 7164cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7184cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7198189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 72227c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 7234eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 7244cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7254eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 7264cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7274eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 7284eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 7294eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType == 0) { 730c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 73116564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 73216564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 73316564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff DefaultFunctionArrayConversion(RetValExp); 7344eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff CurBlock->ReturnType = RetValExp->getType().getTypePtr(); 735c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 7364eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff CurBlock->ReturnType = Context.VoidTy.getTypePtr(); 7374eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 73898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump QualType FnRetType = QualType(CurBlock->ReturnType, 0); 7394cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7404eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 7414eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 7424eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 7434eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 7444eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) { 7454eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 7468189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek RetValExp->Destroy(Context); 7474eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 7484eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7498189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 7504eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7514cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7524cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl if (!RetValExp) 7534cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 7544cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 75598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 75698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // we have a non-void block with an expression, continue checking 75798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump QualType RetValType = RetValExp->getType(); 75898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 75998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // C99 6.8.6.4p3(136): The return statement is not an assignment. The 76098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // overlap restriction of subclause 6.5.16.1 does not apply to the case of 76198eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // function return. 7624cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 76398eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // In C++ the return statement is handled via a copy initialization. 76498eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // the C version of which boils down to CheckSingleAssignmentConstraints. 76598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // FIXME: Leaks RetValExp. 76698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (PerformCopyInitialization(RetValExp, FnRetType, "returning")) 76798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump return StmtError(); 76898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 76998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (RetValExp) CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 77098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 7714cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7728189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 7734eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 7745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7754cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7764cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlSema::ActOnReturnStmt(SourceLocation ReturnLoc, ExprArg rex) { 7774cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl Expr *RetValExp = static_cast<Expr *>(rex.release()); 7784eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock) 7794eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 7804cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 781371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 782371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 783371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 784371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner else 785371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = getCurMethodDecl()->getResultType(); 7865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7875cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 7883c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (RetValExp) {// C99 6.8.6.4p1 (ext_ since GCC warns) 78965ce04bef06696379682410f399f37b43996d824Chris Lattner unsigned D = diag::ext_return_has_expr; 79065ce04bef06696379682410f399f37b43996d824Chris Lattner if (RetValExp->getType()->isVoidType()) 79165ce04bef06696379682410f399f37b43996d824Chris Lattner D = diag::ext_return_has_void_expr; 7924cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 793e878eb035b343d7d819c092102364ec9849716aeChris Lattner // return (some void expression); is legal in C++. 794e878eb035b343d7d819c092102364ec9849716aeChris Lattner if (D != diag::ext_return_has_void_expr || 795e878eb035b343d7d819c092102364ec9849716aeChris Lattner !getLangOptions().CPlusPlus) { 796e878eb035b343d7d819c092102364ec9849716aeChris Lattner NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 797e878eb035b343d7d819c092102364ec9849716aeChris Lattner Diag(ReturnLoc, D) 798e878eb035b343d7d819c092102364ec9849716aeChris Lattner << CurDecl->getDeclName() << isa<ObjCMethodDecl>(CurDecl) 799e878eb035b343d7d819c092102364ec9849716aeChris Lattner << RetValExp->getSourceRange(); 800e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 8015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8028189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 8035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8044cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 8053c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (!RetValExp) { 8063c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 8073c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 8083c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 8093c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 8103c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 81108631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 8123c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 81308631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 8148189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, (Expr*)0)); 8153c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner } 8164cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 817898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 818898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // we have a non-void function with an expression, continue checking 819898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor QualType RetValType = RetValExp->getType(); 8204cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 821898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 822898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 8234cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // function return. 8244cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 825898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // In C++ the return statement is handled via a copy initialization. 8264cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // the C version of which boils down to CheckSingleAssignmentConstraints. 8274cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // FIXME: Leaks RetValExp. 828898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (PerformCopyInitialization(RetValExp, FnRetType, "returning")) 8294cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(); 8304cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 831898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (RetValExp) CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 832898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 833898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 8348189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 8355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8373037ed0a27dba62e522304183718efc149e8b6d9Sebastian RedlSema::OwningStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, 8383037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsSimple, 8393037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsVolatile, 8403037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumOutputs, 8413037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumInputs, 8423037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl std::string *Names, 8433037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg constraints, 8443037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg exprs, 8453037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl ExprArg asmString, 8463037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg clobbers, 8473037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl SourceLocation RParenLoc) { 8483037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 8493037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 8503037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 8513037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl Expr **Exprs = reinterpret_cast<Expr **>(exprs.get()); 8523037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral *AsmString = cast<StringLiteral>((Expr *)asmString.get()); 8533037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 8543037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 85503eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson llvm::SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 85603eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson 8571708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 8586bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (AsmString->isWide()) 8593037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 8603037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 8613037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 8623037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 8631708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 8641708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 8656bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 8663037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 8673037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 8683037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 869d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson std::string OutputConstraint(Literal->getStrData(), 870d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson Literal->getByteLength()); 8713037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 872d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson TargetInfo::ConstraintInfo info; 8736bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (!Context.Target.validateOutputConstraint(OutputConstraint.c_str(),info)) 8743037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 8753037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl diag::err_asm_invalid_output_constraint) << OutputConstraint); 8763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 877d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 8781708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner ParenExpr *OutputExpr = cast<ParenExpr>(Exprs[i]); 87928be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner Expr::isLvalueResult Result = OutputExpr->isLvalue(Context); 88004728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson if (Result != Expr::LV_Valid) { 8813037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(OutputExpr->getSubExpr()->getLocStart(), 882dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 8833037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << OutputExpr->getSubExpr()->getSourceRange()); 88404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 88503eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson 88603eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson OutputConstraintInfos.push_back(info); 88704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 8883037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 88904728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 8901708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 8916bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 8923037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 8933037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 8943037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 8953037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl std::string InputConstraint(Literal->getStrData(), 896d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson Literal->getByteLength()); 8973037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 898d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson TargetInfo::ConstraintInfo info; 899d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson if (!Context.Target.validateInputConstraint(InputConstraint.c_str(), 90045b050e72d058131e6f169fe54888bb91a003fb5Anders Carlsson &Names[0], 90103eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson &Names[0] + NumOutputs, 90203eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson &OutputConstraintInfos[0], 90303eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson info)) { 9043037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 9053037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl diag::err_asm_invalid_input_constraint) << InputConstraint); 906d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 9073037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9081708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner ParenExpr *InputExpr = cast<ParenExpr>(Exprs[i]); 9093037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 910d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 911e6ea27995fb15add0de47588b4226049fa0753e5Anders Carlsson if ((info & TargetInfo::CI_AllowsMemory) 912e6ea27995fb15add0de47588b4226049fa0753e5Anders Carlsson && !(info & TargetInfo::CI_AllowsRegister)) { 913d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->isLvalue(Context) != Expr::LV_Valid) 914d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson return StmtError(Diag(InputExpr->getSubExpr()->getLocStart(), 915d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 916d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson << InputConstraint << InputExpr->getSubExpr()->getSourceRange()); 91704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 9183037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 919d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (info & TargetInfo::CI_AllowsRegister) { 920d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 921d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson return StmtError(Diag(InputExpr->getSubExpr()->getLocStart(), 922d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 923d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson << InputExpr->getType() << InputConstraint 924d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson << InputExpr->getSubExpr()->getSourceRange()); 925d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 926d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson 927562489e0c8bbfc2490377542590e048cde822934Anders Carlsson DefaultFunctionArrayConversion(Exprs[i]); 928d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 92904728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 9303037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9316fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 9321708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 9331708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 9346bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 9353037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 9363037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 9373037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9383037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl llvm::SmallString<16> Clobber(Literal->getStrData(), 9393037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl Literal->getStrData() + 9406fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson Literal->getByteLength()); 9413037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9426bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (!Context.Target.isValidGCCRegisterName(Clobber.c_str())) 9433037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 9443037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl diag::err_asm_unknown_register_name) << Clobber.c_str()); 9456fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 9463037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9473037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl constraints.release(); 9483037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl exprs.release(); 9493037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl asmString.release(); 9503037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl clobbers.release(); 9518189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) AsmStmt(AsmLoc, IsSimple, IsVolatile, NumOutputs, 9528189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek NumInputs, Names, Constraints, Exprs, 9538189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek AsmString, NumClobbers, 9548189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek Clobbers, RParenLoc)); 955fe795956194141c91ae555985c9b930595bff43fChris Lattner} 9563b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 957431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 958431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 959431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl SourceLocation RParen, StmtArg Parm, 960431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg Body, StmtArg catchList) { 961431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl Stmt *CatchList = static_cast<Stmt*>(catchList.release()); 9628189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ObjCAtCatchStmt *CS = new (Context) ObjCAtCatchStmt(AtLoc, RParen, 963431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl static_cast<Stmt*>(Parm.release()), static_cast<Stmt*>(Body.release()), 964431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl CatchList); 965431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl return Owned(CatchList ? CatchList : CS); 9663b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 9673b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 968431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 969431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, StmtArg Body) { 9708189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, 9718189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(Body.release()))); 972161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 973bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 974431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 975431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, 976431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg Try, StmtArg Catch, StmtArg Finally) { 9778189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCAtTryStmt(AtLoc, 9788189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(Try.release()), 979431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl static_cast<Stmt*>(Catch.release()), 980431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl static_cast<Stmt*>(Finally.release()))); 981bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 982bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 983431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 984e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve NaroffSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, ExprArg expr, 985e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *CurScope) { 9867151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff Expr *ThrowExpr = static_cast<Expr*>(expr.release()); 9877151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!ThrowExpr) { 988e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 989e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 990e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 991e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 992e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 993e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 994e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Diag(AtLoc, diag::error_rethrow_used_outside_catch); 9957151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } else { 9967151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff QualType ThrowType = ThrowExpr->getType(); 9977151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff // Make sure the expression type is an ObjC pointer or "void *". 9987151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!Context.isObjCObjectPointerType(ThrowType)) { 9997151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff const PointerType *PT = ThrowType->getAsPointerType(); 10007151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!PT || !PT->getPointeeType()->isVoidType()) 10017151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff // This should be an error, however GCC only yields a warning. 10027151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff Diag(AtLoc, diag::warn_objc_throw_expects_object) 10037151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff << ThrowExpr->getType() << ThrowExpr->getSourceRange(); 10047151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } 10057151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } 10067151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff return Owned(new (Context) ObjCAtThrowStmt(AtLoc, ThrowExpr)); 100739f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 1008bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1009431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1010431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, ExprArg SynchExpr, 1011431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg SynchBody) { 10128189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, 1013431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl static_cast<Stmt*>(SynchExpr.release()), 1014431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl static_cast<Stmt*>(SynchBody.release()))); 1015fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 10164b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 10174b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 10184b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 10194b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian RedlAction::OwningStmtResult 10204b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian RedlSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, DeclTy *ExDecl, 10214b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl StmtArg HandlerBlock) { 10224b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 10238189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 10248189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<VarDecl*>(ExDecl), 10258189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(HandlerBlock.release()))); 10264b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 10278351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 10288351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 10298351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 10308351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlAction::OwningStmtResult 10318351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlSema::ActOnCXXTryBlock(SourceLocation TryLoc, StmtArg TryBlock, 10328351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 10338351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 10348351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 10358351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 10368351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl Stmt **Handlers = reinterpret_cast<Stmt**>(RawHandlers.get()); 10378351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 10388351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl for(unsigned i = 0; i < NumHandlers - 1; ++i) { 10398351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl CXXCatchStmt *Handler = llvm::cast<CXXCatchStmt>(Handlers[i]); 10408351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl if (!Handler->getExceptionDecl()) 10418351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl return StmtError(Diag(Handler->getLocStart(), diag::err_early_catch_all)); 10428351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 10438351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers for the same type as an earlier one. 10448351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // This one is rather easy. 10458351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 10468351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 10478351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 10488351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 10498351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 10508351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 10518351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl RawHandlers.release(); 10528189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXTryStmt(TryLoc, 10538189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(TryBlock.release()), 10548189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek Handlers, NumHandlers)); 10558351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 1056