SemaStmt.cpp revision 117054a99f4994e4ec8a1fc904b554e1f2dc9b29
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" 196fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson#include "clang/Basic/TargetInfo.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/Diagnostic.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) { 37a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(new 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 4681c018d9482e7cc2addadc6202dcf162a01faefdChris Lattner ScopedDecl *SD = cast<ScopedDecl>(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; 518ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek while (SD) { 528ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek ScopedDecl* d = SD; 538ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek SD = SD->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()); 62a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(new DeclStmt(DG, StartLoc, EndLoc)); 638ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek } 648ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek else { 6508631c5fa053867146b5ee8be658c229f6bf127cChris Lattner DeclGroupOwningRef DG(DeclGroup::Create(Context, decls.size(), &decls[0])); 66a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(new 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) { 891bddf7e9c5f0243f0a2f65bc40b31e060ff260f3Ted Kremenek ScopedDecl *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 119a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl return Owned(new CompoundStmt(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(); 152b5a69586f1b8855ee4c1f0bb7a8f0ff4fe32ce09Steve Naroff CaseStmt *CS = new 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 1670fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner DefaultStmt *DS = new DefaultStmt(DefaultLoc, SubStmt); 1688a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner SwitchStack.back()->addSwitchCase(DS); 169117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 1731b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II, 1740fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner SourceLocation ColonLoc, StmtTy *subStmt) { 1750fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Stmt *SubStmt = static_cast<Stmt*>(subStmt); 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelStmt *&LabelDecl = LabelMap[II]; 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If not forward referenced or defined already, just create a new LabelStmt. 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LabelDecl == 0) 1810fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner return LabelDecl = new LabelStmt(IdentLoc, II, SubStmt); 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(LabelDecl->getID() == II && "Label mismatch!"); 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 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); 1900fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner return SubStmt; 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 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); 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return LabelDecl; 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 2011b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnIfStmt(SourceLocation IfLoc, ExprTy *CondVal, 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StmtTy *ThenVal, SourceLocation ElseLoc, 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StmtTy *ElseVal) { 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Expr *condExpr = (Expr *)CondVal; 2052d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson Stmt *thenStmt = (Stmt *)ThenVal; 2062d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 2071b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnIfStmt(): missing expression"); 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 209c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff DefaultFunctionArrayConversion(condExpr); 210c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff QualType condType = condExpr->getType(); 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2125921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 2135921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 2145921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis return true; 2155921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else if (!condType->isScalarType()) // C99 6.8.4.1p1 216d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner return Diag(IfLoc, diag::err_typecheck_statement_requires_scalar) 217d162584991885ab004a02573a73ce06422b921fcChris Lattner << condType << condExpr->getSourceRange(); 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2192d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 2202d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 2212d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 2222d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 2232d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (!ElseVal) { 2242d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 2252d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 2262d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 2272d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 2282d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson return new IfStmt(IfLoc, condExpr, thenStmt, (Stmt*)ElseVal); 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 2321b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnStartOfSwitchStmt(ExprTy *cond) { 233f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *Cond = static_cast<Expr*>(cond); 234f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 2355921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 2365921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // C++ 6.4.2.p2: 2375921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // The condition shall be of integral type, enumeration type, or of a class 2385921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // type for which a single conversion function to integral or enumeration 2395921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // type exists (12.3). If the condition is of class type, the condition is 2405921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // converted by calling that conversion function, and the result of the 2415921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // conversion is used in place of the original condition for the remainder 2425921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // of this section. Integral promotions are performed. 2435921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis 2445921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis QualType Ty = Cond->getType(); 2455921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis 2465921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: Handle class types. 2475921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis 2485921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // If the type is wrong a diagnostic will be emitted later at 2495921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // ActOnFinishSwitchStmt. 2505921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (Ty->isIntegralType() || Ty->isEnumeralType()) { 2515921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // Integral promotions are performed. 2525921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: Integral promotions for C++ are not complete. 2535921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis UsualUnaryConversions(Cond); 2545921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 2555921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else { 2565921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 2575921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis UsualUnaryConversions(Cond); 2585921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 259f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 260f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner SwitchStmt *SS = new SwitchStmt(Cond); 261c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SwitchStack.push_back(SS); 262c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson return SS; 263c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson} 2646c36be5b383875b490684bcf439d6d427298c1afChris Lattner 265f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 266f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 267f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 268f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 269f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 270f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner SourceLocation Loc, 271f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 272f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 273f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 274f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 275f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 276f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.extend(NewWidth); 277f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 278f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If the input was signed and negative and the output is unsigned, 279f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // warn. 280f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (!NewSign && OldVal.isSigned() && OldVal.isNegative()) 281d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << OldVal.toString(10) << Val.toString(10); 282f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 283f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 284f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 285f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 286f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 287f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.trunc(NewWidth); 288b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 289f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.extend(Val.getBitWidth()); 290b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 291f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 292d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 293f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 294f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 295f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 296f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.trunc(NewWidth); 297b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 298f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 299f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 300f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 301f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 302f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 303f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 304f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (Val.isNegative()) // Sign bit changes meaning. 305d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << OldVal.toString(10) << Val.toString(10); 306f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 307f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 308f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3090471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3100471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3110471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3120471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3130471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3140471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3150e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3160e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3170e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3180e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3190471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3200471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3210471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3220471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3230471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3240471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3250471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 326764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 327764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 328764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 329764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 330764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 331764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 332764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 333764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 334764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 335764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 336764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 337764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 338764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 339764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 340c1fcb7762673be706b0a40477d5e93411e918f93Anders CarlssonAction::StmtResult 341764a7ce5217f9569e100a3445f47496ee82daf86Chris LattnerSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, StmtTy *Switch, 342764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner ExprTy *Body) { 343c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson Stmt *BodyStmt = (Stmt*)Body; 344c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 345c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SwitchStmt *SS = SwitchStack.back(); 346c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson assert(SS == (SwitchStmt*)Switch && "switch stack missing push/pop!"); 347c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 3489dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 349c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SwitchStack.pop_back(); 350c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 351f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 352f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner QualType CondType = CondExpr->getType(); 3536c36be5b383875b490684bcf439d6d427298c1afChris Lattner 354f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (!CondType->isIntegerType()) { // C99 6.8.4.2p1 355d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(SwitchLoc, diag::err_typecheck_statement_requires_integer) 356d162584991885ab004a02573a73ce06422b921fcChris Lattner << CondType << CondExpr->getSourceRange(); 357f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner return true; 358c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 359f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 360f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 361f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 36298be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CondWidth = static_cast<unsigned>(Context.getTypeSize(CondType)); 363f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner bool CondIsSigned = CondType->isSignedIntegerType(); 364f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 365f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 366f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 367f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 3680471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner typedef llvm::SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 3690471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 370f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 371f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 372f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRanges; 373f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 374f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 375c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 376b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 377b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 378b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner for (SwitchCase *SC = SS->getSwitchCaseList(); SC; 379c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 380b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 381c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 382f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 383f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 3845f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 385c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 386f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 387f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // we'll return a valid AST. This requires recursing down the 388f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // AST and finding it, not something we are set up to do right now. For 389f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // now, just lop the entire switch stmt out of the AST. 390b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 391c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 392f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 393c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 394f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 395f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 396f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 397f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 398f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 3991e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 40051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 401f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 402f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 403f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 404f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CS->getLHS()->getLocStart(), 405f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 4066c36be5b383875b490684bcf439d6d427298c1afChris Lattner 4071e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 4081e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 4091e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner ImpCastExprToType(Lo, CondType); 4101e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 4111e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner 412b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 413f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (CS->getRHS()) 414f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 415b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner else 416b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 417f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 418f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 419f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 420b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Sort all the scalar case values so we can easily detect duplicates. 421764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 422b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 423f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner if (!CaseVals.empty()) { 424f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner for (unsigned i = 0, e = CaseVals.size()-1; i != e; ++i) { 425f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner if (CaseVals[i].first == CaseVals[i+1].first) { 426f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner // If we have a duplicate, report it. 427f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner Diag(CaseVals[i+1].second->getLHS()->getLocStart(), 428d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner diag::err_duplicate_case) << CaseVals[i].first.toString(10); 429f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner Diag(CaseVals[i].second->getLHS()->getLocStart(), 4305f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner diag::note_duplicate_case_prev); 431f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner // FIXME: We really want to remove the bogus case stmt from the substmt, 432f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner // but we have no way to do this right now. 433f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner CaseListIsErroneous = true; 434f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner } 435b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 436b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 437f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 438b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Detect duplicate case ranges, which usually don't exist at all in the first 439b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // place. 440b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (!CaseRanges.empty()) { 441b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Sort all the case ranges by their low value so we can easily detect 442b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // overlaps between ranges. 4430471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 444b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 445b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Scan the ranges, computing the high values and removing empty ranges. 446b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner std::vector<llvm::APSInt> HiVals; 4476efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 448b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseStmt *CR = CaseRanges[i].second; 4491e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Hi = CR->getRHS(); 45051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 451b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 452b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Convert the value to the same width/sign as the condition. 453b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 454b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CR->getRHS()->getLocStart(), 455b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner diag::warn_case_value_overflow); 456b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 4571e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 4581e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 4591e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner ImpCastExprToType(Hi, CondType); 4601e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CR->setRHS(Hi); 4611e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner 4626efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner // If the low value is bigger than the high value, the case is empty. 4636efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner if (CaseRanges[i].first > HiVal) { 464dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 465dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << SourceRange(CR->getLHS()->getLocStart(), 466dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner CR->getRHS()->getLocEnd()); 4676efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner CaseRanges.erase(CaseRanges.begin()+i); 4686efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner --i, --e; 4696efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner continue; 4706efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 471b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner HiVals.push_back(HiVal); 472b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 473b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 474b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Rescan the ranges, looking for overlap with singleton values and other 4750471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // ranges. Since the range list is sorted, we only need to compare case 4760471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // ranges with their neighbors. 477b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 4780471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner llvm::APSInt &CRLo = CaseRanges[i].first; 4790471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner llvm::APSInt &CRHi = HiVals[i]; 4800471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseStmt *CR = CaseRanges[i].second; 4810471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 4820471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Check to see whether the case range overlaps with any singleton cases. 4830471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseStmt *OverlapStmt = 0; 4840471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner llvm::APSInt OverlapVal(32); 4850471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 4860471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Find the smallest value >= the lower bound. If I is in the case range, 4870471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // then we have overlap. 4880471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 4890471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseVals.end(), CRLo, 4900471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseCompareFunctor()); 4910471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (I != CaseVals.end() && I->first < CRHi) { 4920471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapVal = I->first; // Found overlap with scalar. 4930471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapStmt = I->second; 4940471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 4950471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 4960471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Find the smallest value bigger than the upper bound. 4970471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 4980471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 4990471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapVal = (I-1)->first; // Found overlap with scalar. 5000471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapStmt = (I-1)->second; 5010471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 5020471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 5030471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Check to see if this case stmt overlaps with the subsequent case range. 5040471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (i && CRLo <= HiVals[i-1]) { 5050471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapVal = HiVals[i-1]; // Found overlap with range. 5060471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapStmt = CaseRanges[i-1].second; 5070471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 508b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 5090471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (OverlapStmt) { 5100471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // If we have a duplicate, report it. 511d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 512d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner << OverlapVal.toString(10); 5130471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner Diag(OverlapStmt->getLHS()->getLocStart(), 5145f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner diag::note_duplicate_case_prev); 5150471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // FIXME: We really want to remove the bogus case stmt from the substmt, 5160471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // but we have no way to do this right now. 5170471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseListIsErroneous = true; 5180471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 519b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 520b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 521f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 522b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // FIXME: If the case list was broken is some way, we don't have a good system 523b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // to patch it up. Instead, just return the whole substmt as broken. 524b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 525b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner return true; 526f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 527c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson return SS; 5285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 5311b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnWhileStmt(SourceLocation WhileLoc, ExprTy *Cond, StmtTy *Body) { 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Expr *condExpr = (Expr *)Cond; 5331b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnWhileStmt(): missing expression"); 5345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 535c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff DefaultFunctionArrayConversion(condExpr); 536c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff QualType condType = condExpr->getType(); 5375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5385921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 5395921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 5405921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis return true; 5415921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else if (!condType->isScalarType()) // C99 6.8.5p2 542d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner return Diag(WhileLoc, diag::err_typecheck_statement_requires_scalar) 543d162584991885ab004a02573a73ce06422b921fcChris Lattner << condType << condExpr->getSourceRange(); 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 545b5a69586f1b8855ee4c1f0bb7a8f0ff4fe32ce09Steve Naroff return new WhileStmt(condExpr, (Stmt*)Body, WhileLoc); 5465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 5491b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnDoStmt(SourceLocation DoLoc, StmtTy *Body, 5505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation WhileLoc, ExprTy *Cond) { 5515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Expr *condExpr = (Expr *)Cond; 5521b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnDoStmt(): missing expression"); 5535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 554c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff DefaultFunctionArrayConversion(condExpr); 555c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff QualType condType = condExpr->getType(); 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5576314ff264c345b5babb9faf50dad0bc68d7bd74eArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 5586314ff264c345b5babb9faf50dad0bc68d7bd74eArgyrios Kyrtzidis if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 5596314ff264c345b5babb9faf50dad0bc68d7bd74eArgyrios Kyrtzidis return true; 5606314ff264c345b5babb9faf50dad0bc68d7bd74eArgyrios Kyrtzidis } else if (!condType->isScalarType()) // C99 6.8.5p2 561d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner return Diag(DoLoc, diag::err_typecheck_statement_requires_scalar) 562d162584991885ab004a02573a73ce06422b921fcChris Lattner << condType << condExpr->getSourceRange(); 5635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 564b5a69586f1b8855ee4c1f0bb7a8f0ff4fe32ce09Steve Naroff return new DoStmt((Stmt*)Body, condExpr, DoLoc); 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 5681b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 56936c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner StmtTy *first, ExprTy *second, ExprTy *third, 57036c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner SourceLocation RParenLoc, StmtTy *body) { 57136c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner Stmt *First = static_cast<Stmt*>(first); 57236c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner Expr *Second = static_cast<Expr*>(second); 57336c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner Expr *Third = static_cast<Expr*>(third); 57436c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner Stmt *Body = static_cast<Stmt*>(body); 57536c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner 5765921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 5775921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 578f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 579f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 580f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 5815921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 5825921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 5835921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 5845921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD && VD->isBlockVarDecl() && !VD->hasLocalStorage()) 5855921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 5865921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 5875921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 5885921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 5895921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 590ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Second) { 59336c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner DefaultFunctionArrayConversion(Second); 59436c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner QualType SecondType = Second->getType(); 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5965921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 5975921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (CheckCXXBooleanCondition(Second)) // C++ 6.4p4 5985921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis return true; 5995921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else if (!SecondType->isScalarType()) // C99 6.8.5p2 600d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner return Diag(ForLoc, diag::err_typecheck_statement_requires_scalar) 601d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 6025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 603b5a69586f1b8855ee4c1f0bb7a8f0ff4fe32ce09Steve Naroff return new ForStmt(First, Second, Third, Body, ForLoc); 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6063ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz JahanianAction::StmtResult 6077571228ec9b31de7733ae96352ee4eaa8afcf2b5Fariborz JahanianSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 6083ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian SourceLocation LParenLoc, 6093ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian StmtTy *first, ExprTy *second, 6103ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian SourceLocation RParenLoc, StmtTy *body) { 6113ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian Stmt *First = static_cast<Stmt*>(first); 6123ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian Expr *Second = static_cast<Expr*>(second); 6133ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian Stmt *Body = static_cast<Stmt*>(body); 61420552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 61520552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 61620552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 617f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek if (!DS->hasSolitaryDecl()) 618f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek return Diag((*DS->decl_begin())->getLocation(), 619f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek diag::err_toomany_element_decls); 620f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek 621f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek ScopedDecl *D = DS->getSolitaryDecl(); 622f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek FirstType = cast<ValueDecl>(D)->getType(); 623f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 624f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 625f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 626248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff VarDecl *VD = cast<VarDecl>(D); 627248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff if (VD->isBlockVarDecl() && !VD->hasLocalStorage()) 628248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff return Diag(VD->getLocation(), diag::err_non_variable_decl_in_for); 6291fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 6301fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson Expr::isLvalueResult lval = cast<Expr>(First)->isLvalue(Context); 6311fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 6321fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson if (lval != Expr::LV_Valid) 633dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner return Diag(First->getLocStart(), diag::err_selector_element_not_lvalue) 634dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << First->getSourceRange(); 6351fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 6361fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson FirstType = static_cast<Expr*>(first)->getType(); 6371fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 638b6ccaac65ca72f72954eb3893bbd940bedd23f00Ted Kremenek if (!Context.isObjCObjectPointerType(FirstType)) 639dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 640d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 6413ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 6423ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian if (Second) { 6433ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian DefaultFunctionArrayConversion(Second); 6443ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian QualType SecondType = Second->getType(); 645b6ccaac65ca72f72954eb3893bbd940bedd23f00Ted Kremenek if (!Context.isObjCObjectPointerType(SecondType)) 646dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_collection_expr_type) 647d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 6483ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 6497571228ec9b31de7733ae96352ee4eaa8afcf2b5Fariborz Jahanian return new ObjCForCollectionStmt(First, Second, Body, ForLoc, RParenLoc); 6503ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 6515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 6531b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnGotoStmt(SourceLocation GotoLoc, SourceLocation LabelLoc, 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *LabelII) { 6554eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If we are in a block, reject all gotos for now. 6564eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock) 6574eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return Diag(GotoLoc, diag::err_goto_in_block); 6584eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelStmt *&LabelDecl = LabelMap[LabelII]; 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we haven't seen this label yet, create a forward reference. 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LabelDecl == 0) 6645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelDecl = new LabelStmt(LabelLoc, LabelII, 0); 6655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 66661f62165220e75694fe333179c78815e2e48d71fTed Kremenek return new GotoStmt(LabelDecl, GotoLoc, LabelLoc); 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 6701b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc,SourceLocation StarLoc, 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ExprTy *DestExp) { 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: Verify that the operand is convertible to void*. 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return new IndirectGotoStmt((Expr*)DestExp); 6755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 6781b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 6805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 6815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ContinueLoc, diag::err_continue_not_in_loop); 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 686507f2d5811bd7da1a4d9d2f4960f32177dfab9deSteve Naroff return new ContinueStmt(ContinueLoc); 6875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 6901b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 6915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 6925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 6935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 6945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(BreakLoc, diag::err_break_not_in_loop_or_switch); 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 698507f2d5811bd7da1a4d9d2f4960f32177dfab9deSteve Naroff return new BreakStmt(BreakLoc); 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 70127c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 7024eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 7034eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffAction::StmtResult 7044eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 7054eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 7064eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 7074eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 7084eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType == 0) { 709c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 71016564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 71116564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 71216564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff DefaultFunctionArrayConversion(RetValExp); 7134eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff CurBlock->ReturnType = RetValExp->getType().getTypePtr(); 714c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 7154eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff CurBlock->ReturnType = Context.VoidTy.getTypePtr(); 7164eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return new ReturnStmt(ReturnLoc, RetValExp); 7174eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7184eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 7194eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 7204eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 7214eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 7224eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 7234eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) { 7244eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 7254eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff delete RetValExp; 7264eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 7274eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7284eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return new ReturnStmt(ReturnLoc, RetValExp); 7294eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7304eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 7314eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (!RetValExp) { 7324eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_block_return_missing_expr); 7334eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return true; 7344eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7354eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 7364eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // we have a non-void block with an expression, continue checking 7374eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff QualType RetValType = RetValExp->getType(); 7384eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 7394eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // For now, restrict multiple return statements in a block to have 7404eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // strict compatible types only. 7414eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff QualType BlockQT = QualType(CurBlock->ReturnType, 0); 7424eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (Context.getCanonicalType(BlockQT).getTypePtr() 7434eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff != Context.getCanonicalType(RetValType).getTypePtr()) { 7444eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff DiagnoseAssignmentResult(Incompatible, ReturnLoc, BlockQT, 7454eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValType, RetValExp, "returning"); 7464eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return true; 7474eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7484eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 7494eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) CheckReturnStackAddr(RetValExp, BlockQT, ReturnLoc); 7504eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 7514eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return new ReturnStmt(ReturnLoc, (Expr*)RetValExp); 7524eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 7535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::StmtResult 7551b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnReturnStmt(SourceLocation ReturnLoc, ExprTy *rex) { 75690045e8ebabf50d6f1b3a67081a621b20b5e5341Steve Naroff Expr *RetValExp = static_cast<Expr *>(rex); 7574eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock) 7584eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 759371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner 760371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 761371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 762371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 763371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner else 764371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = getCurMethodDecl()->getResultType(); 7655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7665cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 7673c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (RetValExp) {// C99 6.8.6.4p1 (ext_ since GCC warns) 76865ce04bef06696379682410f399f37b43996d824Chris Lattner unsigned D = diag::ext_return_has_expr; 76965ce04bef06696379682410f399f37b43996d824Chris Lattner if (RetValExp->getType()->isVoidType()) 77065ce04bef06696379682410f399f37b43996d824Chris Lattner D = diag::ext_return_has_void_expr; 77165ce04bef06696379682410f399f37b43996d824Chris Lattner 772e878eb035b343d7d819c092102364ec9849716aeChris Lattner // return (some void expression); is legal in C++. 773e878eb035b343d7d819c092102364ec9849716aeChris Lattner if (D != diag::ext_return_has_void_expr || 774e878eb035b343d7d819c092102364ec9849716aeChris Lattner !getLangOptions().CPlusPlus) { 775e878eb035b343d7d819c092102364ec9849716aeChris Lattner NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 776e878eb035b343d7d819c092102364ec9849716aeChris Lattner Diag(ReturnLoc, D) 777e878eb035b343d7d819c092102364ec9849716aeChris Lattner << CurDecl->getDeclName() << isa<ObjCMethodDecl>(CurDecl) 778e878eb035b343d7d819c092102364ec9849716aeChris Lattner << RetValExp->getSourceRange(); 779e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 7805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7813c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner return new ReturnStmt(ReturnLoc, RetValExp); 7825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7833c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 7843c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (!RetValExp) { 7853c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 7863c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 7873c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 7883c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 7893c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 79008631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 7913c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 79208631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 7933c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner return new ReturnStmt(ReturnLoc, (Expr*)0); 7943c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner } 7953c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 796898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 797898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // we have a non-void function with an expression, continue checking 798898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor QualType RetValType = RetValExp->getType(); 799898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 800898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 801898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 802898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // function return. 803898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 804898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // In C++ the return statement is handled via a copy initialization. 805898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // the C version of which boils down to 806898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // CheckSingleAssignmentConstraints. 807898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (PerformCopyInitialization(RetValExp, FnRetType, "returning")) 808898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor return true; 80906de276fff91264437fa75111ed76de43097e089Ted Kremenek 810898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (RetValExp) CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 811898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 812898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 813507f2d5811bd7da1a4d9d2f4960f32177dfab9deSteve Naroff return new ReturnStmt(ReturnLoc, (Expr*)RetValExp); 8145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8166a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders CarlssonSema::StmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, 81708631c5fa053867146b5ee8be658c229f6bf127cChris Lattner bool IsSimple, 81839c47b56f45437bbc49c9568b7308a400234a730Anders Carlsson bool IsVolatile, 819b235fc2cf37621c7fc6511bb2b8788c95f9fb9fcAnders Carlsson unsigned NumOutputs, 820b235fc2cf37621c7fc6511bb2b8788c95f9fb9fcAnders Carlsson unsigned NumInputs, 821b235fc2cf37621c7fc6511bb2b8788c95f9fb9fcAnders Carlsson std::string *Names, 8221708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner ExprTy **constraints, 8231708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner ExprTy **exprs, 8246bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner ExprTy *asmString, 825b235fc2cf37621c7fc6511bb2b8788c95f9fb9fcAnders Carlsson unsigned NumClobbers, 8261708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner ExprTy **clobbers, 827fe795956194141c91ae555985c9b930595bff43fChris Lattner SourceLocation RParenLoc) { 8281708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral **Constraints = reinterpret_cast<StringLiteral**>(constraints); 8291708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner Expr **Exprs = reinterpret_cast<Expr **>(exprs); 8306bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner StringLiteral *AsmString = cast<StringLiteral>((Expr *)asmString); 8311708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers); 8321708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner 8331708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 8346bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (AsmString->isWide()) 8356bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner // FIXME: We currently leak memory here. 836dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner return Diag(AsmString->getLocStart(), diag::err_asm_wide_character) 837dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << AsmString->getSourceRange(); 8386bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner 8396bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner 8401708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 8411708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 8426bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 8436bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner // FIXME: We currently leak memory here. 844dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner return Diag(Literal->getLocStart(), diag::err_asm_wide_character) 845dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << Literal->getSourceRange(); 8466bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner 847d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson std::string OutputConstraint(Literal->getStrData(), 848d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson Literal->getByteLength()); 849d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson 850d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson TargetInfo::ConstraintInfo info; 8516bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (!Context.Target.validateOutputConstraint(OutputConstraint.c_str(),info)) 852d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // FIXME: We currently leak memory here. 8536bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner return Diag(Literal->getLocStart(), 854f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner diag::err_asm_invalid_output_constraint) << OutputConstraint; 855d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson 856d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 8571708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner ParenExpr *OutputExpr = cast<ParenExpr>(Exprs[i]); 85828be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner Expr::isLvalueResult Result = OutputExpr->isLvalue(Context); 85904728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson if (Result != Expr::LV_Valid) { 86004728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson // FIXME: We currently leak memory here. 8611708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner return Diag(OutputExpr->getSubExpr()->getLocStart(), 862dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 863dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << OutputExpr->getSubExpr()->getSourceRange(); 86404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 86504728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 86604728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson 86704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 8681708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 8696bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 8706bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner // FIXME: We currently leak memory here. 871dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner return Diag(Literal->getLocStart(), diag::err_asm_wide_character) 872dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << Literal->getSourceRange(); 873d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson 874d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson std::string InputConstraint(Literal->getStrData(), 875d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson Literal->getByteLength()); 876d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson 877d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson TargetInfo::ConstraintInfo info; 878d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson if (!Context.Target.validateInputConstraint(InputConstraint.c_str(), 8791708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner NumOutputs, info)) { 880d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // FIXME: We currently leak memory here. 8816bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner return Diag(Literal->getLocStart(), 882dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_input_constraint) << InputConstraint; 883d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 88404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson 885d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the input exprs aren't of type void. 8861708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner ParenExpr *InputExpr = cast<ParenExpr>(Exprs[i]); 88704728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson if (InputExpr->getType()->isVoidType()) { 88804728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson 88904728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson // FIXME: We currently leak memory here. 8901708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner return Diag(InputExpr->getSubExpr()->getLocStart(), 891fa25bbb351f4fdd977f51254119cdfc2b525ce90Chris Lattner diag::err_asm_invalid_type_in_input) 892d162584991885ab004a02573a73ce06422b921fcChris Lattner << InputExpr->getType() << InputConstraint 893fa25bbb351f4fdd977f51254119cdfc2b525ce90Chris Lattner << InputExpr->getSubExpr()->getSourceRange(); 89404728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 89504728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 896b235fc2cf37621c7fc6511bb2b8788c95f9fb9fcAnders Carlsson 8976fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 8981708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 8991708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 9006bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 9016bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner // FIXME: We currently leak memory here. 902dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner return Diag(Literal->getLocStart(), diag::err_asm_wide_character) 903dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << Literal->getSourceRange(); 9046fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson 9056fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson llvm::SmallString<16> Clobber(Literal->getStrData(), 9066fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson Literal->getStrData() + 9076fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson Literal->getByteLength()); 9086fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson 9096bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (!Context.Target.isValidGCCRegisterName(Clobber.c_str())) 9106fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // FIXME: We currently leak memory here. 9116bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner return Diag(Literal->getLocStart(), 912f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner diag::err_asm_unknown_register_name) << Clobber.c_str(); 9136fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 9146fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson 9151708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner return new AsmStmt(AsmLoc, IsSimple, IsVolatile, NumOutputs, NumInputs, 9161708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner Names, Constraints, Exprs, AsmString, NumClobbers, 9171708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner Clobbers, RParenLoc); 918fe795956194141c91ae555985c9b930595bff43fChris Lattner} 9193b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 9203b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz JahanianAction::StmtResult 921a526c5c67e5a0473c340903ee542ce570119665fTed KremenekSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 9223b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian SourceLocation RParen, StmtTy *Parm, 9233b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian StmtTy *Body, StmtTy *CatchList) { 924a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCAtCatchStmt *CS = new ObjCAtCatchStmt(AtLoc, RParen, 9253b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian static_cast<Stmt*>(Parm), static_cast<Stmt*>(Body), 9263b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian static_cast<Stmt*>(CatchList)); 9273b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian return CatchList ? CatchList : CS; 9283b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 9293b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 930161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz JahanianAction::StmtResult 931a526c5c67e5a0473c340903ee542ce570119665fTed KremenekSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, StmtTy *Body) { 932a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCAtFinallyStmt *FS = new ObjCAtFinallyStmt(AtLoc, 933161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian static_cast<Stmt*>(Body)); 934161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian return FS; 935161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 936bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 937bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz JahanianAction::StmtResult 938a526c5c67e5a0473c340903ee542ce570119665fTed KremenekSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, 939bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian StmtTy *Try, StmtTy *Catch, StmtTy *Finally) { 940a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCAtTryStmt *TS = new ObjCAtTryStmt(AtLoc, static_cast<Stmt*>(Try), 941bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian static_cast<Stmt*>(Catch), 942bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian static_cast<Stmt*>(Finally)); 943bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian return TS; 944bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 945bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 94639f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz JahanianAction::StmtResult 947a526c5c67e5a0473c340903ee542ce570119665fTed KremenekSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, StmtTy *Throw) { 948a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCAtThrowStmt *TS = new ObjCAtThrowStmt(AtLoc, static_cast<Stmt*>(Throw)); 94939f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian return TS; 95039f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 951bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 952fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz JahanianAction::StmtResult 953fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz JahanianSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, ExprTy *SynchExpr, 954fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian StmtTy *SynchBody) { 955fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian ObjCAtSynchronizedStmt *SS = new ObjCAtSynchronizedStmt(AtLoc, 956a0f55792409289d1d343023fa8292cff6355e538Fariborz Jahanian static_cast<Stmt*>(SynchExpr), static_cast<Stmt*>(SynchBody)); 957fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian return SS; 958fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 9594b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 9604b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 9614b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 9624b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian RedlAction::OwningStmtResult 9634b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian RedlSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, DeclTy *ExDecl, 9644b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl StmtArg HandlerBlock) { 9654b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 9664b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl return Owned(new CXXCatchStmt(CatchLoc, static_cast<VarDecl*>(ExDecl), 9674b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl static_cast<Stmt*>(HandlerBlock.release()))); 9684b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 9698351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 9708351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 9718351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 9728351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlAction::OwningStmtResult 9738351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlSema::ActOnCXXTryBlock(SourceLocation TryLoc, StmtArg TryBlock, 9748351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 9758351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 9768351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 9778351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 9788351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl Stmt **Handlers = reinterpret_cast<Stmt**>(RawHandlers.get()); 9798351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 9808351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl for(unsigned i = 0; i < NumHandlers - 1; ++i) { 9818351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl CXXCatchStmt *Handler = llvm::cast<CXXCatchStmt>(Handlers[i]); 9828351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl if (!Handler->getExceptionDecl()) 9838351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl return StmtError(Diag(Handler->getLocStart(), diag::err_early_catch_all)); 9848351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 9858351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers for the same type as an earlier one. 9868351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // This one is rather easy. 9878351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 9888351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 9898351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 9908351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 9918351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 9928351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 9938351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl RawHandlers.release(); 9948351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl return Owned(new CXXTryStmt(TryLoc, static_cast<Stmt*>(TryBlock.release()), 9958351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl Handlers, NumHandlers)); 9968351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 997