SemaStmt.cpp revision 7e24e82a70a2c681f4291a3397bcd1e1005f251a
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) { 619653db7bd0e3665b955a0445859285f2e1e7dacdDouglas Gregor DeclGroupRef DG(*decls.begin()); 628189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) DeclStmt(DG, StartLoc, EndLoc)); 638ffb159441e923322bef6b5dee1aaf24c738d75eTed Kremenek } 6424e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 6524e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner DeclGroupRef DG(DeclGroup::Create(Context, decls.size(), &decls[0])); 6624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return Owned(new (Context) DeclStmt(DG, StartLoc, EndLoc)); 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 69a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian RedlAction::OwningStmtResult 701b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnCompoundStmt(SourceLocation L, SourceLocation R, 71a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl MultiStmtArg elts, bool isStmtExpr) { 72a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl unsigned NumElts = elts.size(); 73a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl Stmt **Elts = reinterpret_cast<Stmt**>(elts.release()); 74c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // If we're in C89 mode, check that we don't have any decls after stmts. If 75c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // so, emit an extension diagnostic. 76c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus) { 77c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Note that __extension__ can be around a decl. 78c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner unsigned i = 0; 79c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // Skip over all declarations. 80c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && isa<DeclStmt>(Elts[i]); ++i) 81c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 82c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 83c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner // We found the end of the list or a statement. Scan for another declstmt. 84c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner for (; i != NumElts && !isa<DeclStmt>(Elts[i]); ++i) 85c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner /*empty*/; 86c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner 87c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner if (i != NumElts) { 884afa39deaa245592977136d367251ee2c173dd8dDouglas Gregor Decl *D = *cast<DeclStmt>(Elts[i])->decl_begin(); 89c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner Diag(D->getLocation(), diag::ext_mixed_decls_code); 90c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 91c30ebfbf23d6a471146e3c68c2cf7f170b7e55dcChris Lattner } 9298414c1b7d1944a57156d52e29bd41c005de09acChris Lattner // Warn about unused expressions in statements. 9398414c1b7d1944a57156d52e29bd41c005de09acChris Lattner for (unsigned i = 0; i != NumElts; ++i) { 9498414c1b7d1944a57156d52e29bd41c005de09acChris Lattner Expr *E = dyn_cast<Expr>(Elts[i]); 9598414c1b7d1944a57156d52e29bd41c005de09acChris Lattner if (!E) continue; 9698414c1b7d1944a57156d52e29bd41c005de09acChris Lattner 97026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner // Warn about expressions with unused results if they are non-void and if 98026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner // this not the last stmt in a stmt expr. 99026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner if (E->getType()->isVoidType() || (isStmtExpr && i == NumElts-1)) 10098414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 10198414c1b7d1944a57156d52e29bd41c005de09acChris Lattner 102026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner SourceLocation Loc; 103026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner SourceRange R1, R2; 104026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner if (!E->isUnusedResultAWarning(Loc, R1, R2)) 10598414c1b7d1944a57156d52e29bd41c005de09acChris Lattner continue; 106026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner 107026dc96ac6ece60da5e1b98e2a71bd0ff0939fd8Chris Lattner Diag(Loc, diag::warn_unused_expr) << R1 << R2; 10898414c1b7d1944a57156d52e29bd41c005de09acChris Lattner } 109a60528cdac7deee3991c2b48af4df4f315e49e9dSebastian Redl 1108189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CompoundStmt(Context, Elts, NumElts, L, R)); 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 113117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlAction::OwningStmtResult 114117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlSema::ActOnCaseStmt(SourceLocation CaseLoc, ExprArg lhsval, 115117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl SourceLocation DotDotDotLoc, ExprArg rhsval, 11624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner SourceLocation ColonLoc) { 117117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl assert((lhsval.get() != 0) && "missing expression in case statement"); 118117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.4.2p3: The expression shall be an integer constant. 12051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // However, GCC allows any evaluatable integer expression. 121117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Expr *LHSVal = static_cast<Expr*>(lhsval.get()); 122d3a61d5ec5357d19b7c0b6b599231e68dc5e237fAnders Carlsson if (VerifyIntegerConstantExpression(LHSVal)) 12324e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1256c36be5b383875b490684bcf439d6d427298c1afChris Lattner // GCC extension: The expression shall be an integer constant. 126117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 127117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Expr *RHSVal = static_cast<Expr*>(rhsval.get()); 128117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl if (RHSVal && VerifyIntegerConstantExpression(RHSVal)) { 129f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner RHSVal = 0; // Recover by just forgetting about it. 130117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl rhsval = 0; 131117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl } 132117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1338a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner if (SwitchStack.empty()) { 1348a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner Diag(CaseLoc, diag::err_case_not_in_switch); 13524e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner return StmtError(); 1368a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner } 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 138117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl // Only now release the smart pointers. 139117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl lhsval.release(); 140117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl rhsval.release(); 14124e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = new (Context) CaseStmt(LHSVal, RHSVal, CaseLoc); 1428a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner SwitchStack.back()->addSwitchCase(CS); 143117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(CS); 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 14624e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner/// ActOnCaseStmtBody - This installs a statement as the body of a case. 14724e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattnervoid Sema::ActOnCaseStmtBody(StmtTy *caseStmt, StmtArg subStmt) { 14824e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CaseStmt *CS = static_cast<CaseStmt*>(caseStmt); 14924e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner Stmt *SubStmt = static_cast<Stmt*>(subStmt.release()); 15024e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner CS->setSubStmt(SubStmt); 15124e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner} 15224e1e707b4c362f18e371e2bbf054a8345b57bfaChris Lattner 153117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian RedlAction::OwningStmtResult 1541b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnDefaultStmt(SourceLocation DefaultLoc, SourceLocation ColonLoc, 155117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl StmtArg subStmt, Scope *CurScope) { 156117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl Stmt *SubStmt = static_cast<Stmt*>(subStmt.release()); 157117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1588a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner if (SwitchStack.empty()) { 1590fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner Diag(DefaultLoc, diag::err_default_not_in_switch); 160117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(SubStmt); 1610fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner } 162117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl 1638189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek DefaultStmt *DS = new (Context) DefaultStmt(DefaultLoc, SubStmt); 1648a87e57beb96212ee61dc08a5f691cd7f7710703Chris Lattner SwitchStack.back()->addSwitchCase(DS); 165117054a99f4994e4ec8a1fc904b554e1f2dc9b29Sebastian Redl return Owned(DS); 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 168de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 1691b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II, 170de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl SourceLocation ColonLoc, StmtArg subStmt) { 171de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Stmt *SubStmt = static_cast<Stmt*>(subStmt.release()); 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 173d8eb456289a81728f9aac77ac0a4db0ea9cc231aSteve Naroff LabelStmt *&LabelDecl = CurBlock ? CurBlock->LabelMap[II] : LabelMap[II]; 174de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If not forward referenced or defined already, just create a new LabelStmt. 176caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff if (LabelDecl == 0) 177caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff return Owned(LabelDecl = new (Context) LabelStmt(IdentLoc, II, SubStmt)); 178de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(LabelDecl->getID() == II && "Label mismatch!"); 180de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was either forward reference or multiply defined. If 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // multiply defined, reject it now. 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (LabelDecl->getSubStmt()) { 18408631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(IdentLoc, diag::err_redefinition_of_label) << LabelDecl->getID(); 1855f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(LabelDecl->getIdentLoc(), diag::note_previous_definition); 186de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SubStmt); 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 188de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this label was forward declared, and we just found its real 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // definition. Fill in the forward definition and return it. 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer LabelDecl->setIdentLoc(IdentLoc); 1920fa152e72bb71c4aa184d0edd91caa9cbebbf70eChris Lattner LabelDecl->setSubStmt(SubStmt); 193de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(LabelDecl); 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 196de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 197de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlSema::ActOnIfStmt(SourceLocation IfLoc, ExprArg CondVal, 198de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg ThenVal, SourceLocation ElseLoc, 199de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg ElseVal) { 200de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Expr *condExpr = (Expr *)CondVal.release(); 201de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2021b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnIfStmt(): missing expression"); 203de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 204c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff DefaultFunctionArrayConversion(condExpr); 205de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl // Take ownership again until we're past the error checking. 206de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl CondVal = condExpr; 207c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff QualType condType = condExpr->getType(); 208de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2095921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 2105921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 211de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 2125921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else if (!condType->isScalarType()) // C99 6.8.4.1p1 213de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(Diag(IfLoc, diag::err_typecheck_statement_requires_scalar) 214de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl << condType << condExpr->getSourceRange()); 215de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 216de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Stmt *thenStmt = (Stmt *)ThenVal.release(); 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2182d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // Warn if the if block has a null body without an else value. 2192d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // this helps prevent bugs due to typos, such as 2202d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // if (condition); 2212d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson // do_stuff(); 222de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl if (!ElseVal.get()) { 2232d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson if (NullStmt* stmt = dyn_cast<NullStmt>(thenStmt)) 2242d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson Diag(stmt->getSemiLoc(), diag::warn_empty_if_body); 2252d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson } 2262d85f8ba62fd6fdcf0ae303d77112b413d412caeAnders Carlsson 227de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl CondVal.release(); 2288189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) IfStmt(IfLoc, condExpr, thenStmt, 2298189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek (Stmt*)ElseVal.release())); 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 232de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 233de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlSema::ActOnStartOfSwitchStmt(ExprArg cond) { 234de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Expr *Cond = static_cast<Expr*>(cond.release()); 235de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2365921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 2375921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // C++ 6.4.2.p2: 2385921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // The condition shall be of integral type, enumeration type, or of a class 2395921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // type for which a single conversion function to integral or enumeration 2405921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // type exists (12.3). If the condition is of class type, the condition is 2415921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // converted by calling that conversion function, and the result of the 2425921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // conversion is used in place of the original condition for the remainder 2435921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // of this section. Integral promotions are performed. 2445921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis 2455921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis QualType Ty = Cond->getType(); 2465921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis 2475921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: Handle class types. 2485921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis 2495921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // If the type is wrong a diagnostic will be emitted later at 2505921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // ActOnFinishSwitchStmt. 2515921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (Ty->isIntegralType() || Ty->isEnumeralType()) { 2525921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // Integral promotions are performed. 2535921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: Integral promotions for C++ are not complete. 2545921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis UsualUnaryConversions(Cond); 2555921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 2565921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else { 2575921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // C99 6.8.4.2p5 - Integer promotions are performed on the controlling expr. 2585921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis UsualUnaryConversions(Cond); 2595921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 260de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 2618189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek SwitchStmt *SS = new (Context) SwitchStmt(Cond); 262c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SwitchStack.push_back(SS); 263de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 264c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson} 2656c36be5b383875b490684bcf439d6d427298c1afChris Lattner 266f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 267f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified width and sign. If an overflow occurs, detect it and emit 268f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner/// the specified diagnostic. 269f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattnervoid Sema::ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &Val, 270f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned NewWidth, bool NewSign, 271f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner SourceLocation Loc, 272f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner unsigned DiagID) { 273f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Perform a conversion to the promoted condition type if needed. 274f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (NewWidth > Val.getBitWidth()) { 275f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is an extension, just do it. 276f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 277f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.extend(NewWidth); 278f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 279f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If the input was signed and negative and the output is unsigned, 280f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // warn. 281f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (!NewSign && OldVal.isSigned() && OldVal.isNegative()) 282d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << OldVal.toString(10) << Val.toString(10); 283f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 284f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 285f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewWidth < Val.getBitWidth()) { 286f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // If this is a truncation, check for overflow. 287f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt ConvVal(Val); 288f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.trunc(NewWidth); 289b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(NewSign); 290f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvVal.extend(Val.getBitWidth()); 291b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner ConvVal.setIsSigned(Val.isSigned()); 292f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (ConvVal != Val) 293d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << Val.toString(10) << ConvVal.toString(10); 294f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 295f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Regardless of whether a diagnostic was emitted, really do the 296f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // truncation. 297f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.trunc(NewWidth); 298b2137ae3f1bd0aadb0552189af2824a324ffaa69Chris Lattner Val.setIsSigned(NewSign); 299f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else if (NewSign != Val.isSigned()) { 300f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the sign to match the sign of the condition. This can cause 301f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // overflow as well: unsigned(INTMIN) 302f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner llvm::APSInt OldVal(Val); 303f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Val.setIsSigned(NewSign); 304f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 305f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (Val.isNegative()) // Sign bit changes meaning. 306d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, DiagID) << OldVal.toString(10) << Val.toString(10); 307f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 308f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner} 309f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 3100471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattnernamespace { 3110471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner struct CaseCompareFunctor { 3120471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3130471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const llvm::APSInt &RHS) { 3140471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS.first < RHS; 3150471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3160e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner bool operator()(const std::pair<llvm::APSInt, CaseStmt*> &LHS, 3170e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3180e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner return LHS.first < RHS.first; 3190e85a2761ace912c66663d779dd230f88cf77fe0Chris Lattner } 3200471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner bool operator()(const llvm::APSInt &LHS, 3210471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner const std::pair<llvm::APSInt, CaseStmt*> &RHS) { 3220471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner return LHS < RHS.first; 3230471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 3240471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner }; 3250471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner} 3260471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 327764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// CmpCaseVals - Comparison predicate for sorting case values. 328764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner/// 329764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattnerstatic bool CmpCaseVals(const std::pair<llvm::APSInt, CaseStmt*>& lhs, 330764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner const std::pair<llvm::APSInt, CaseStmt*>& rhs) { 331764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first < rhs.first) 332764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 333764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 334764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner if (lhs.first == rhs.first && 335764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner lhs.second->getCaseLoc().getRawEncoding() 336764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner < rhs.second->getCaseLoc().getRawEncoding()) 337764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return true; 338764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner return false; 339764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner} 340764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner 341de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlAction::OwningStmtResult 342de307473448fb3cebcb4c10090728300b53bca03Sebastian RedlSema::ActOnFinishSwitchStmt(SourceLocation SwitchLoc, StmtArg Switch, 343de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl StmtArg Body) { 344de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Stmt *BodyStmt = (Stmt*)Body.release(); 345de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 346c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SwitchStmt *SS = SwitchStack.back(); 347de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl assert(SS == (SwitchStmt*)Switch.get() && "switch stack missing push/pop!"); 348de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 3499dcbfa450d751bd68fc4af8b75da381d4f6984b9Steve Naroff SS->setBody(BodyStmt, SwitchLoc); 350c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SwitchStack.pop_back(); 351c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 352f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Expr *CondExpr = SS->getCond(); 353f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner QualType CondType = CondExpr->getType(); 354de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 355f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (!CondType->isIntegerType()) { // C99 6.8.4.2p1 356d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(SwitchLoc, diag::err_typecheck_statement_requires_integer) 357d162584991885ab004a02573a73ce06422b921fcChris Lattner << CondType << CondExpr->getSourceRange(); 358de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 359c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 360de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 361f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Get the bitwidth of the switched-on value before promotions. We must 362f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // convert the integer case values to this width before comparison. 36398be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CondWidth = static_cast<unsigned>(Context.getTypeSize(CondType)); 364f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner bool CondIsSigned = CondType->isSignedIntegerType(); 365f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 366f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Accumulate all of the case values in a vector so that we can sort them 367f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // and detect duplicates. This vector contains the APInt for the case after 368f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // it has been converted to the condition type. 3690471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner typedef llvm::SmallVector<std::pair<llvm::APSInt, CaseStmt*>, 64> CaseValsTy; 3700471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy CaseVals; 371f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 372f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Keep track of any GNU case ranges we see. The APSInt is the low value. 373f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner std::vector<std::pair<llvm::APSInt, CaseStmt*> > CaseRanges; 374f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 375f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner DefaultStmt *TheDefaultStmt = 0; 376c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 377b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner bool CaseListIsErroneous = false; 378b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 379b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner for (SwitchCase *SC = SS->getSwitchCaseList(); SC; 380c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson SC = SC->getNextSwitchCase()) { 381b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 382c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson if (DefaultStmt *DS = dyn_cast<DefaultStmt>(SC)) { 383f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (TheDefaultStmt) { 384f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner Diag(DS->getDefaultLoc(), diag::err_multiple_default_labels_defined); 3855f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner Diag(TheDefaultStmt->getDefaultLoc(), diag::note_duplicate_case_prev); 386de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 387f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // FIXME: Remove the default statement from the switch block so that 388f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // we'll return a valid AST. This requires recursing down the 389f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // AST and finding it, not something we are set up to do right now. For 390f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // now, just lop the entire switch stmt out of the AST. 391b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseListIsErroneous = true; 392c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson } 393f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner TheDefaultStmt = DS; 394c1fcb7762673be706b0a40477d5e93411e918f93Anders Carlsson 395f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } else { 396f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseStmt *CS = cast<CaseStmt>(SC); 397f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 398f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // We already verified that the expression has a i-c-e value (C99 399f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // 6.8.4.2p3) - get that value now. 4001e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Lo = CS->getLHS(); 40151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt LoVal = Lo->EvaluateAsInt(Context); 402f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 403f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner // Convert the value to the same width/sign as the condition. 404f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner ConvertIntegerToTypeWarnOnOverflow(LoVal, CondWidth, CondIsSigned, 405f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CS->getLHS()->getLocStart(), 406f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner diag::warn_case_value_overflow); 4076c36be5b383875b490684bcf439d6d427298c1afChris Lattner 4081e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 4091e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 4101e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner ImpCastExprToType(Lo, CondType); 4111e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CS->setLHS(Lo); 4121e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner 413b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // If this is a case range, remember it in CaseRanges, otherwise CaseVals. 414f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner if (CS->getRHS()) 415f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner CaseRanges.push_back(std::make_pair(LoVal, CS)); 416b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner else 417b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseVals.push_back(std::make_pair(LoVal, CS)); 418f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 419f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner } 420f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 421b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Sort all the scalar case values so we can easily detect duplicates. 422764a7ce5217f9569e100a3445f47496ee82daf86Chris Lattner std::stable_sort(CaseVals.begin(), CaseVals.end(), CmpCaseVals); 423b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 424f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner if (!CaseVals.empty()) { 425f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner for (unsigned i = 0, e = CaseVals.size()-1; i != e; ++i) { 426f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner if (CaseVals[i].first == CaseVals[i+1].first) { 427f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner // If we have a duplicate, report it. 428f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner Diag(CaseVals[i+1].second->getLHS()->getLocStart(), 429d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner diag::err_duplicate_case) << CaseVals[i].first.toString(10); 430f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner Diag(CaseVals[i].second->getLHS()->getLocStart(), 4315f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner diag::note_duplicate_case_prev); 432f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner // FIXME: We really want to remove the bogus case stmt from the substmt, 433f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner // but we have no way to do this right now. 434f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner CaseListIsErroneous = true; 435f334850cd2fc2d4ac9b585f80d97b4f0097a0348Chris Lattner } 436b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 437b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 438f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 439b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Detect duplicate case ranges, which usually don't exist at all in the first 440b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // place. 441b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (!CaseRanges.empty()) { 442b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Sort all the case ranges by their low value so we can easily detect 443b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // overlaps between ranges. 4440471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner std::stable_sort(CaseRanges.begin(), CaseRanges.end()); 445b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 446b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Scan the ranges, computing the high values and removing empty ranges. 447b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner std::vector<llvm::APSInt> HiVals; 4486efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 449b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CaseStmt *CR = CaseRanges[i].second; 4501e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner Expr *Hi = CR->getRHS(); 45151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson llvm::APSInt HiVal = Hi->EvaluateAsInt(Context); 452b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 453b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Convert the value to the same width/sign as the condition. 454b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner ConvertIntegerToTypeWarnOnOverflow(HiVal, CondWidth, CondIsSigned, 455b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner CR->getRHS()->getLocStart(), 456b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner diag::warn_case_value_overflow); 457b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 4581e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // If the LHS is not the same type as the condition, insert an implicit 4591e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner // cast. 4601e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner ImpCastExprToType(Hi, CondType); 4611e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner CR->setRHS(Hi); 4621e0a39012467b4f409142c32148036a9ee05e1d7Chris Lattner 4636efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner // If the low value is bigger than the high value, the case is empty. 4646efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner if (CaseRanges[i].first > HiVal) { 465dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(CR->getLHS()->getLocStart(), diag::warn_case_empty_range) 466dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << SourceRange(CR->getLHS()->getLocStart(), 467dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner CR->getRHS()->getLocEnd()); 4686efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner CaseRanges.erase(CaseRanges.begin()+i); 4696efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner --i, --e; 4706efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner continue; 4716efc4d3659632ddcea4a58cb62e9ee54ca4a373eChris Lattner } 472b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner HiVals.push_back(HiVal); 473b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 474b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 475b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // Rescan the ranges, looking for overlap with singleton values and other 4760471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // ranges. Since the range list is sorted, we only need to compare case 4770471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // ranges with their neighbors. 478b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner for (unsigned i = 0, e = CaseRanges.size(); i != e; ++i) { 4790471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner llvm::APSInt &CRLo = CaseRanges[i].first; 4800471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner llvm::APSInt &CRHi = HiVals[i]; 4810471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseStmt *CR = CaseRanges[i].second; 4820471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 4830471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Check to see whether the case range overlaps with any singleton cases. 4840471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseStmt *OverlapStmt = 0; 4850471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner llvm::APSInt OverlapVal(32); 4860471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 4870471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Find the smallest value >= the lower bound. If I is in the case range, 4880471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // then we have overlap. 4890471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseValsTy::iterator I = std::lower_bound(CaseVals.begin(), 4900471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseVals.end(), CRLo, 4910471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseCompareFunctor()); 4920471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (I != CaseVals.end() && I->first < CRHi) { 4930471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapVal = I->first; // Found overlap with scalar. 4940471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapStmt = I->second; 4950471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 4960471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 4970471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Find the smallest value bigger than the upper bound. 4980471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner I = std::upper_bound(I, CaseVals.end(), CRHi, CaseCompareFunctor()); 4990471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (I != CaseVals.begin() && (I-1)->first >= CRLo) { 5000471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapVal = (I-1)->first; // Found overlap with scalar. 5010471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapStmt = (I-1)->second; 5020471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 5030471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner 5040471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // Check to see if this case stmt overlaps with the subsequent case range. 5050471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (i && CRLo <= HiVals[i-1]) { 5060471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapVal = HiVals[i-1]; // Found overlap with range. 5070471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner OverlapStmt = CaseRanges[i-1].second; 5080471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 509b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner 5100471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner if (OverlapStmt) { 5110471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // If we have a duplicate, report it. 512d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(CR->getLHS()->getLocStart(), diag::err_duplicate_case) 513d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner << OverlapVal.toString(10); 5140471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner Diag(OverlapStmt->getLHS()->getLocStart(), 5155f4a6829dc58cab2f76e2b98492859aa3b91e3f2Chris Lattner diag::note_duplicate_case_prev); 5160471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // FIXME: We really want to remove the bogus case stmt from the substmt, 5170471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner // but we have no way to do this right now. 5180471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner CaseListIsErroneous = true; 5190471f5bc8191e39cdb61fabcaf1870e2af2d42e8Chris Lattner } 520b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 521b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner } 522f4021e7d5228a2be5a380269dffa0331a6c78b95Chris Lattner 523b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // FIXME: If the case list was broken is some way, we don't have a good system 524b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner // to patch it up. Instead, just return the whole substmt as broken. 525b2ec9d6fede9cccc170a202de7bf7f523dea8be4Chris Lattner if (CaseListIsErroneous) 526de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return StmtError(); 527de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl 528de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl Switch.release(); 529de307473448fb3cebcb4c10090728300b53bca03Sebastian Redl return Owned(SS); 5305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 532f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 533f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnWhileStmt(SourceLocation WhileLoc, ExprArg Cond, StmtArg Body) { 534f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *condExpr = (Expr *)Cond.release(); 5351b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnWhileStmt(): missing expression"); 536f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 537c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff DefaultFunctionArrayConversion(condExpr); 538f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond = condExpr; 539c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff QualType condType = condExpr->getType(); 540f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 5415921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 5425921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 543f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(); 5445921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else if (!condType->isScalarType()) // C99 6.8.5p2 545f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(WhileLoc, 546f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_typecheck_statement_requires_scalar) 547f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << condType << condExpr->getSourceRange()); 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 549f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond.release(); 5508189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) WhileStmt(condExpr, (Stmt*)Body.release(), 5518189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek WhileLoc)); 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 554f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 555f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnDoStmt(SourceLocation DoLoc, StmtArg Body, 556f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation WhileLoc, ExprArg Cond) { 557f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *condExpr = (Expr *)Cond.release(); 5581b273c403734d343d720acb28f04011807c8aa56Steve Naroff assert(condExpr && "ActOnDoStmt(): missing expression"); 559f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 560c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff DefaultFunctionArrayConversion(condExpr); 561f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond = condExpr; 562c80b4eefa221f10871e7fed0ab9dc7d9d3d07dd0Steve Naroff QualType condType = condExpr->getType(); 563f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 5646314ff264c345b5babb9faf50dad0bc68d7bd74eArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 5656314ff264c345b5babb9faf50dad0bc68d7bd74eArgyrios Kyrtzidis if (CheckCXXBooleanCondition(condExpr)) // C++ 6.4p4 566f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(); 5676314ff264c345b5babb9faf50dad0bc68d7bd74eArgyrios Kyrtzidis } else if (!condType->isScalarType()) // C99 6.8.5p2 568f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(DoLoc, diag::err_typecheck_statement_requires_scalar) 569f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << condType << condExpr->getSourceRange()); 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 571f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Cond.release(); 5728189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) DoStmt((Stmt*)Body.release(), condExpr, DoLoc)); 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 575f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 576f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, 577f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl StmtArg first, ExprArg second, ExprArg third, 578f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation RParenLoc, StmtArg body) { 579f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *First = static_cast<Stmt*>(first.get()); 580f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Second = static_cast<Expr*>(second.get()); 581f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Third = static_cast<Expr*>(third.get()); 582f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *Body = static_cast<Stmt*>(body.get()); 583f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 5845921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (!getLangOptions().CPlusPlus) { 5855921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (DeclStmt *DS = dyn_cast_or_null<DeclStmt>(First)) { 586f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 587f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 588f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 5895921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis for (DeclStmt::decl_iterator DI=DS->decl_begin(), DE=DS->decl_end(); 5905921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis DI!=DE; ++DI) { 5915921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VarDecl *VD = dyn_cast<VarDecl>(*DI); 5925921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD && VD->isBlockVarDecl() && !VD->hasLocalStorage()) 5935921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis VD = 0; 5945921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (VD == 0) 5955921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis Diag((*DI)->getLocation(), diag::err_non_variable_decl_in_for); 5965921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis // FIXME: mark decl erroneous! 5975921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } 598ae3b701f59e78e058b83344be17206af3bf5d277Chris Lattner } 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Second) { 60136c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner DefaultFunctionArrayConversion(Second); 60236c4b0ec13453bc003bbac380770b45ae35ef19cChris Lattner QualType SecondType = Second->getType(); 603f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 6045921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 6055921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis if (CheckCXXBooleanCondition(Second)) // C++ 6.4p4 606f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(); 6075921093cf1c2e9a8bd1a22b6f612e551bae7476bArgyrios Kyrtzidis } else if (!SecondType->isScalarType()) // C99 6.8.5p2 608f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(ForLoc, 609f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_typecheck_statement_requires_scalar) 610f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << SecondType << Second->getSourceRange()); 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 612f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl first.release(); 613f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl second.release(); 614f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl third.release(); 615f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl body.release(); 6168189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ForStmt(First, Second, Third, Body, ForLoc)); 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 619f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlAction::OwningStmtResult 620f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian RedlSema::ActOnObjCForCollectionStmt(SourceLocation ForLoc, 621f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation LParenLoc, 622f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl StmtArg first, ExprArg second, 623f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl SourceLocation RParenLoc, StmtArg body) { 624f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *First = static_cast<Stmt*>(first.get()); 625f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Expr *Second = static_cast<Expr*>(second.get()); 626f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl Stmt *Body = static_cast<Stmt*>(body.get()); 62720552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (First) { 62820552d2842245692b649e0d25380670922f954a2Fariborz Jahanian QualType FirstType; 62920552d2842245692b649e0d25380670922f954a2Fariborz Jahanian if (DeclStmt *DS = dyn_cast<DeclStmt>(First)) { 6307e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner if (!DS->isSingleDecl()) 631f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag((*DS->decl_begin())->getLocation(), 632f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_toomany_element_decls)); 633f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl 6347e24e82a70a2c681f4291a3397bcd1e1005f251aChris Lattner Decl *D = DS->getSingleDecl(); 635f34afeed9a0112bf31fee185b6c80556111d3834Ted Kremenek FirstType = cast<ValueDecl>(D)->getType(); 636f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // C99 6.8.5p3: The declaration part of a 'for' statement shall only 637f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // declare identifiers for objects having storage class 'auto' or 638f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner // 'register'. 639248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff VarDecl *VD = cast<VarDecl>(D); 640248a753f6b670692523c99afaeb8fe98f7ae3ca7Steve Naroff if (VD->isBlockVarDecl() && !VD->hasLocalStorage()) 641f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(VD->getLocation(), 642f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_non_variable_decl_in_for)); 6431fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } else { 644810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (cast<Expr>(First)->isLvalue(Context) != Expr::LV_Valid) 645f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl return StmtError(Diag(First->getLocStart(), 646f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl diag::err_selector_element_not_lvalue) 647f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl << First->getSourceRange()); 6481fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson 649f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl FirstType = static_cast<Expr*>(First)->getType(); 6501fe379f0fa6fbc0a6057e8966253aea2957ca953Anders Carlsson } 651b6ccaac65ca72f72954eb3893bbd940bedd23f00Ted Kremenek if (!Context.isObjCObjectPointerType(FirstType)) 652dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_selector_element_type) 653d162584991885ab004a02573a73ce06422b921fcChris Lattner << FirstType << First->getSourceRange(); 6543ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 6553ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian if (Second) { 6563ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian DefaultFunctionArrayConversion(Second); 6573ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian QualType SecondType = Second->getType(); 658b6ccaac65ca72f72954eb3893bbd940bedd23f00Ted Kremenek if (!Context.isObjCObjectPointerType(SecondType)) 659dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ForLoc, diag::err_collection_expr_type) 660d162584991885ab004a02573a73ce06422b921fcChris Lattner << SecondType << Second->getSourceRange(); 6613ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian } 662f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl first.release(); 663f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl second.release(); 664f05b1520d6f175acbfc3913489f4dfa842875ec4Sebastian Redl body.release(); 6658189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCForCollectionStmt(First, Second, Body, 6668189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ForLoc, RParenLoc)); 6673ba5a0f90a03d5e13d02cbee9abd2a1ba01b18bcFariborz Jahanian} 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6694cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 6701b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnGotoStmt(SourceLocation GotoLoc, SourceLocation LabelLoc, 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *LabelII) { 6724eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If we are in a block, reject all gotos for now. 6734eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock) 6744cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(GotoLoc, diag::err_goto_in_block)); 6754eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 6765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look up the record for this label identifier. 677d8eb456289a81728f9aac77ac0a4db0ea9cc231aSteve Naroff LabelStmt *&LabelDecl = CurBlock ? CurBlock->LabelMap[LabelII] : 678d8eb456289a81728f9aac77ac0a4db0ea9cc231aSteve Naroff LabelMap[LabelII]; 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 680caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff // If we haven't seen this label yet, create a forward reference. 681caaacecb2b64e6d2e402533baffda4cb540f4145Steve Naroff if (LabelDecl == 0) 6828189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek LabelDecl = new (Context) LabelStmt(LabelLoc, LabelII, 0); 6834cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 6848189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) GotoStmt(LabelDecl, GotoLoc, LabelLoc)); 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6874cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 6881b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnIndirectGotoStmt(SourceLocation GotoLoc,SourceLocation StarLoc, 6894cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl ExprArg DestExp) { 690bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman // Convert operand to void* 69133083823342649b1fccec856c1f239c09fc0d7e1Eli Friedman Expr* E = DestExp.takeAs<Expr>(); 69233083823342649b1fccec856c1f239c09fc0d7e1Eli Friedman QualType ETy = E->getType(); 69333083823342649b1fccec856c1f239c09fc0d7e1Eli Friedman AssignConvertType ConvTy = 69433083823342649b1fccec856c1f239c09fc0d7e1Eli Friedman CheckSingleAssignmentConstraints(Context.VoidPtrTy, E); 69533083823342649b1fccec856c1f239c09fc0d7e1Eli Friedman if (DiagnoseAssignmentResult(ConvTy, StarLoc, Context.VoidPtrTy, ETy, 69633083823342649b1fccec856c1f239c09fc0d7e1Eli Friedman E, "passing")) 69733083823342649b1fccec856c1f239c09fc0d7e1Eli Friedman return StmtError(); 698bbf462314b1dc8e422b7c4dd4cac47e566aedf6dEli Friedman return Owned(new (Context) IndirectGotoStmt(E)); 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7014cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7021b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope) { 7035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getContinueParent(); 7045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 7055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.2p1: A break shall appear only in or as a loop body. 7064cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ContinueLoc, diag::err_continue_not_in_loop)); 7075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7084cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7098189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ContinueStmt(ContinueLoc)); 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7124cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7131b273c403734d343d720acb28f04011807c8aa56Steve NaroffSema::ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope) { 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Scope *S = CurScope->getBreakParent(); 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!S) { 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.8.6.3p1: A break shall appear only in or as a switch/loop body. 7174cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(BreakLoc, diag::err_break_not_in_loop_or_switch)); 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7194cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7208189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) BreakStmt(BreakLoc)); 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 72327c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// ActOnBlockReturnStmt - Utility routine to figure out block's return type. 7244eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 7254cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7264eb206bebcdab28ababe8df55c6185cec2cdc071Steve NaroffSema::ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) { 7274cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7284eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // If this is the first return we've seen in the block, infer the type of 7294eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // the block from it. 7304eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType == 0) { 731c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff if (RetValExp) { 73216564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // Don't call UsualUnaryConversions(), since we don't want to do 73316564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff // integer promotions here. 73416564420ffe679b0e3cf310c418be6ef98d8e658Steve Naroff DefaultFunctionArrayConversion(RetValExp); 7354eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff CurBlock->ReturnType = RetValExp->getType().getTypePtr(); 736c50a4a5f2eac14ac4c631d50b0a55cadc87700ceSteve Naroff } else 7374eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff CurBlock->ReturnType = Context.VoidTy.getTypePtr(); 7384eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 73998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump QualType FnRetType = QualType(CurBlock->ReturnType, 0); 7404cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7414eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // Otherwise, verify that this result type matches the previous one. We are 7424eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // pickier with blocks than for normal functions because we don't have GCC 7434eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff // compatibility to worry about here. 7444eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock->ReturnType->isVoidType()) { 7454eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (RetValExp) { 7464eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff Diag(ReturnLoc, diag::err_return_block_has_expr); 7478189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek RetValExp->Destroy(Context); 7484eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff RetValExp = 0; 7494eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7508189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 7514eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff } 7524cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7534cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl if (!RetValExp) 7544cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(Diag(ReturnLoc, diag::err_block_return_missing_expr)); 7554cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 75698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 75798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // we have a non-void block with an expression, continue checking 75898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump QualType RetValType = RetValExp->getType(); 75998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 76098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // C99 6.8.6.4p3(136): The return statement is not an assignment. The 76198eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // overlap restriction of subclause 6.5.16.1 does not apply to the case of 76298eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // function return. 7634cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 76498eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // In C++ the return statement is handled via a copy initialization. 76598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // the C version of which boils down to CheckSingleAssignmentConstraints. 76698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // FIXME: Leaks RetValExp. 76798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (PerformCopyInitialization(RetValExp, FnRetType, "returning")) 76898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump return StmtError(); 76998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 77098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (RetValExp) CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 77198eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 7724cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 7738189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 7744eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 7755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7764cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlAction::OwningStmtResult 7774cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian RedlSema::ActOnReturnStmt(SourceLocation ReturnLoc, ExprArg rex) { 7784cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl Expr *RetValExp = static_cast<Expr *>(rex.release()); 7794eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff if (CurBlock) 7804eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return ActOnBlockReturnStmt(ReturnLoc, RetValExp); 7814cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 782371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner QualType FnRetType; 783371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 784371f258e61e1365b951b17931a3c5ac1530fd1a0Chris Lattner FnRetType = FD->getResultType(); 785c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff else if (ObjCMethodDecl *MD = getCurMethodDecl()) 786c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff FnRetType = MD->getResultType(); 787c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff else // If we don't have a function/method context, bail. 788c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff return StmtError(); 789c97fb9a394ce2cc5e664fcb472e93553528378adSteve Naroff 7905cf216b7fa64b933b60743b0b26053e8e7aa87beChris Lattner if (FnRetType->isVoidType()) { 7913c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (RetValExp) {// C99 6.8.6.4p1 (ext_ since GCC warns) 79265ce04bef06696379682410f399f37b43996d824Chris Lattner unsigned D = diag::ext_return_has_expr; 79365ce04bef06696379682410f399f37b43996d824Chris Lattner if (RetValExp->getType()->isVoidType()) 79465ce04bef06696379682410f399f37b43996d824Chris Lattner D = diag::ext_return_has_void_expr; 7954cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 796e878eb035b343d7d819c092102364ec9849716aeChris Lattner // return (some void expression); is legal in C++. 797e878eb035b343d7d819c092102364ec9849716aeChris Lattner if (D != diag::ext_return_has_void_expr || 798e878eb035b343d7d819c092102364ec9849716aeChris Lattner !getLangOptions().CPlusPlus) { 799e878eb035b343d7d819c092102364ec9849716aeChris Lattner NamedDecl *CurDecl = getCurFunctionOrMethodDecl(); 800e878eb035b343d7d819c092102364ec9849716aeChris Lattner Diag(ReturnLoc, D) 801e878eb035b343d7d819c092102364ec9849716aeChris Lattner << CurDecl->getDeclName() << isa<ObjCMethodDecl>(CurDecl) 802e878eb035b343d7d819c092102364ec9849716aeChris Lattner << RetValExp->getSourceRange(); 803e878eb035b343d7d819c092102364ec9849716aeChris Lattner } 8045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8058189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 8065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8074cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 8083c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (!RetValExp) { 8093c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner unsigned DiagID = diag::warn_return_missing_expr; // C90 6.6.6.4p4 8103c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner // C99 6.8.6.4p1 (ext_ since GCC warns) 8113c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (getLangOptions().C99) DiagID = diag::ext_return_missing_expr; 8123c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner 8133c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner if (FunctionDecl *FD = getCurFunctionDecl()) 81408631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << FD->getIdentifier() << 0/*fn*/; 8153c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner else 81608631c5fa053867146b5ee8be658c229f6bf127cChris Lattner Diag(ReturnLoc, DiagID) << getCurMethodDecl()->getDeclName() << 1/*meth*/; 8178189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, (Expr*)0)); 8183c73c41cefcfe76f36b7bed72c9f1ec195490951Chris Lattner } 8194cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 820898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (!FnRetType->isDependentType() && !RetValExp->isTypeDependent()) { 821898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // we have a non-void function with an expression, continue checking 822898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor QualType RetValType = RetValExp->getType(); 8234cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 824898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // C99 6.8.6.4p3(136): The return statement is not an assignment. The 825898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // overlap restriction of subclause 6.5.16.1 does not apply to the case of 8264cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // function return. 8274cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 828898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor // In C++ the return statement is handled via a copy initialization. 8294cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // the C version of which boils down to CheckSingleAssignmentConstraints. 8304cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl // FIXME: Leaks RetValExp. 831898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (PerformCopyInitialization(RetValExp, FnRetType, "returning")) 8324cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl return StmtError(); 8334cffe2fd5c23168bc08f0453c684cbd3f79471d3Sebastian Redl 834898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (RetValExp) CheckReturnStackAddr(RetValExp, FnRetType, ReturnLoc); 835898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } 836898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 8378189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ReturnStmt(ReturnLoc, RetValExp)); 8385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 840810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 841810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// ignore "noop" casts in places where an lvalue is required by an inline asm. 842810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 843810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// provide a strong guidance to not use it. 844810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// 845810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// This method checks to see if the argument is an acceptable l-value and 846810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner/// returns false if it is a case we can handle. 847810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattnerstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 848810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (E->isLvalue(S.Context) == Expr::LV_Valid) 849810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; // Cool, this is an lvalue. 850810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 851810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 852810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // are supposed to allow. 853810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 854810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (E != E2 && E2->isLvalue(S.Context) == Expr::LV_Valid) { 855810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (!S.getLangOptions().HeinousExtensions) 856810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 857810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 858810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner else 859810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 860810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner << E->getSourceRange(); 861810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // Accept, even if we emitted an error diagnostic. 862810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return false; 863810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner } 864810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 865810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner // None of the above, just randomly invalid non-lvalue. 866810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner return true; 867810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner} 868810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 869810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner 8703037ed0a27dba62e522304183718efc149e8b6d9Sebastian RedlSema::OwningStmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, 8713037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsSimple, 8723037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl bool IsVolatile, 8733037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumOutputs, 8743037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumInputs, 8753037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl std::string *Names, 8763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg constraints, 8773037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg exprs, 8783037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl ExprArg asmString, 8793037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl MultiExprArg clobbers, 8803037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl SourceLocation RParenLoc) { 8813037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl unsigned NumClobbers = clobbers.size(); 8823037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Constraints = 8833037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl reinterpret_cast<StringLiteral**>(constraints.get()); 8843037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl Expr **Exprs = reinterpret_cast<Expr **>(exprs.get()); 8853037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral *AsmString = cast<StringLiteral>((Expr *)asmString.get()); 8863037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.get()); 8873037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 88803eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson llvm::SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 88903eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson 8901708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner // The parser verifies that there is a string literal here. 8916bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (AsmString->isWide()) 8923037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 8933037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << AsmString->getSourceRange()); 8943037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 8953037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 8961708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumOutputs; i++) { 8971708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 8986bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 8993037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 9003037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 9013037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 902d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson std::string OutputConstraint(Literal->getStrData(), 903d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson Literal->getByteLength()); 9043037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 905d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson TargetInfo::ConstraintInfo info; 9066bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (!Context.Target.validateOutputConstraint(OutputConstraint.c_str(),info)) 9073037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 9083037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl diag::err_asm_invalid_output_constraint) << OutputConstraint); 9093037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 910d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson // Check that the output exprs are valid lvalues. 9111708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner ParenExpr *OutputExpr = cast<ParenExpr>(Exprs[i]); 912810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(OutputExpr, *this)) { 9133037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(OutputExpr->getSubExpr()->getLocStart(), 914dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_asm_invalid_lvalue_in_output) 9153037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << OutputExpr->getSubExpr()->getSourceRange()); 91604728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 91703eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson 91803eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson OutputConstraintInfos.push_back(info); 91904728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 9203037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 92104728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 9221708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Constraints[i]; 9236bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 9243037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 9253037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 9263037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9273037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl std::string InputConstraint(Literal->getStrData(), 928d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson Literal->getByteLength()); 9293037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 930d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson TargetInfo::ConstraintInfo info; 931d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson if (!Context.Target.validateInputConstraint(InputConstraint.c_str(), 93245b050e72d058131e6f169fe54888bb91a003fb5Anders Carlsson &Names[0], 93303eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson &Names[0] + NumOutputs, 93403eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson &OutputConstraintInfos[0], 93503eb543cf7ebee463b33b5802b83ac92c21770cfAnders Carlsson info)) { 9363037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 9373037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl diag::err_asm_invalid_input_constraint) << InputConstraint); 938d04c6e23f2e10eeb9936778d67f4a1c4a14cc4f6Anders Carlsson } 9393037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9401708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner ParenExpr *InputExpr = cast<ParenExpr>(Exprs[i]); 9413037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 942d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson // Only allow void types for memory constraints. 943e6ea27995fb15add0de47588b4226049fa0753e5Anders Carlsson if ((info & TargetInfo::CI_AllowsMemory) 944e6ea27995fb15add0de47588b4226049fa0753e5Anders Carlsson && !(info & TargetInfo::CI_AllowsRegister)) { 945810f6d5d6223adaab0ccf0139f40de6484ad1bb5Chris Lattner if (CheckAsmLValue(InputExpr, *this)) 946d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson return StmtError(Diag(InputExpr->getSubExpr()->getLocStart(), 947d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_lvalue_in_input) 948d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson << InputConstraint << InputExpr->getSubExpr()->getSourceRange()); 94904728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 9503037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 951d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (info & TargetInfo::CI_AllowsRegister) { 952d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson if (InputExpr->getType()->isVoidType()) { 953d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson return StmtError(Diag(InputExpr->getSubExpr()->getLocStart(), 954d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson diag::err_asm_invalid_type_in_input) 955d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson << InputExpr->getType() << InputConstraint 956d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson << InputExpr->getSubExpr()->getSourceRange()); 957d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 958d9fca6e3950346ea503f92f27ed0f9d8edde9febAnders Carlsson } 9596032979a5d091e5607c7c467400449727d9beb5aAnders Carlsson 9606032979a5d091e5607c7c467400449727d9beb5aAnders Carlsson DefaultFunctionArrayConversion(Exprs[i]); 96104728b7ea928b029f165fc67d32ced40e6868b31Anders Carlsson } 9623037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9636fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson // Check that the clobbers are valid. 9641708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner for (unsigned i = 0; i != NumClobbers; i++) { 9651708b963a014b48103e78131f960a13ee1aa6d0cChris Lattner StringLiteral *Literal = Clobbers[i]; 9666bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (Literal->isWide()) 9673037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 9683037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl << Literal->getSourceRange()); 9693037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9703037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl llvm::SmallString<16> Clobber(Literal->getStrData(), 9713037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl Literal->getStrData() + 9726fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson Literal->getByteLength()); 9733037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9746bc52112dbc54551bd8e215d95bba4791b2275f7Chris Lattner if (!Context.Target.isValidGCCRegisterName(Clobber.c_str())) 9753037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl return StmtError(Diag(Literal->getLocStart(), 9763037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl diag::err_asm_unknown_register_name) << Clobber.c_str()); 9776fa9086043b0338d895a4cdb0ec8542530af90d7Anders Carlsson } 9783037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl 9793037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl constraints.release(); 9803037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl exprs.release(); 9813037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl asmString.release(); 9823037ed0a27dba62e522304183718efc149e8b6d9Sebastian Redl clobbers.release(); 983fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner AsmStmt *NS = 984fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner new (Context) AsmStmt(AsmLoc, IsSimple, IsVolatile, NumOutputs, NumInputs, 985fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner Names, Constraints, Exprs, AsmString, NumClobbers, 986fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner Clobbers, RParenLoc); 987fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // Validate the asm string, ensuring it makes sense given the operands we 988fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner // have. 989fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner llvm::SmallVector<AsmStmt::AsmStringPiece, 8> Pieces; 990fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner unsigned DiagOffs; 991fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 9922ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 9932ff0f42a962fec5a6300b5986297b417db173e6aChris Lattner << AsmString->getSourceRange(); 994fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner DeleteStmt(NS); 995fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return StmtError(); 996fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner } 997fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner 998fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner 999fb5058ef67c054296c88db18ab1b3717845cb71dChris Lattner return Owned(NS); 1000fe795956194141c91ae555985c9b930595bff43fChris Lattner} 10013b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 1002431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1003431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtCatchStmt(SourceLocation AtLoc, 10047ba138abd329e591a8f6d5001f60dd7082f71b3bSteve Naroff SourceLocation RParen, DeclTy *Parm, 1005431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg Body, StmtArg catchList) { 1006431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl Stmt *CatchList = static_cast<Stmt*>(catchList.release()); 1007f50cb369273c6bd26c9629df92ee53f1d8af4149Steve Naroff ParmVarDecl *PVD = static_cast<ParmVarDecl*>(Parm); 1008f50cb369273c6bd26c9629df92ee53f1d8af4149Steve Naroff 1009f50cb369273c6bd26c9629df92ee53f1d8af4149Steve Naroff // PVD == 0 implies @catch(...). 10109d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff if (PVD) { 10119d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff if (!Context.isObjCObjectPointerType(PVD->getType())) 10129d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff return StmtError(Diag(PVD->getLocation(), 10139d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff diag::err_catch_param_not_objc_type)); 10149d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff if (PVD->getType()->isObjCQualifiedIdType()) 10159d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff return StmtError(Diag(PVD->getLocation(), 1016d198abae5938262e501a409e833bf01ca8b8253eSteve Naroff diag::err_illegal_qualifiers_on_catch_parm)); 10179d40ee50f8a013e5253101648092cf0daa76c335Steve Naroff } 1018f50cb369273c6bd26c9629df92ee53f1d8af4149Steve Naroff 10198189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek ObjCAtCatchStmt *CS = new (Context) ObjCAtCatchStmt(AtLoc, RParen, 1020f50cb369273c6bd26c9629df92ee53f1d8af4149Steve Naroff PVD, static_cast<Stmt*>(Body.release()), CatchList); 1021431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl return Owned(CatchList ? CatchList : CS); 10223b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian} 10233b1191d7eaf2f4984564e01ab84b6713a9d80e70Fariborz Jahanian 1024431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1025431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtFinallyStmt(SourceLocation AtLoc, StmtArg Body) { 10268189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCAtFinallyStmt(AtLoc, 10278189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(Body.release()))); 1028161a9c5afaafb4d527b7efba9675a8b2cbbe32e0Fariborz Jahanian} 1029bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1030431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1031431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtTryStmt(SourceLocation AtLoc, 1032431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg Try, StmtArg Catch, StmtArg Finally) { 10338189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCAtTryStmt(AtLoc, 10348189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(Try.release()), 1035431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl static_cast<Stmt*>(Catch.release()), 1036431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl static_cast<Stmt*>(Finally.release()))); 1037bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian} 1038bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1039431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 10403dcfe10a6801eb52f4c20f1242bea0a3a98aa146Steve NaroffSema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, ExprArg expr,Scope *CurScope) { 10417151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff Expr *ThrowExpr = static_cast<Expr*>(expr.release()); 10427151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!ThrowExpr) { 1043e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // @throw without an expression designates a rethrow (which much occur 1044e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff // in the context of an @catch clause). 1045e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff Scope *AtCatchParent = CurScope; 1046e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff while (AtCatchParent && !AtCatchParent->isAtCatchScope()) 1047e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff AtCatchParent = AtCatchParent->getParent(); 1048e21dd6ffef4585fa43cd3586ed971217d65bf56cSteve Naroff if (!AtCatchParent) 10494ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_rethrow_used_outside_catch)); 10507151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } else { 10517151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff QualType ThrowType = ThrowExpr->getType(); 10527151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff // Make sure the expression type is an ObjC pointer or "void *". 10537151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!Context.isObjCObjectPointerType(ThrowType)) { 10547151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff const PointerType *PT = ThrowType->getAsPointerType(); 10557151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff if (!PT || !PT->getPointeeType()->isVoidType()) 10564ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff return StmtError(Diag(AtLoc, diag::error_objc_throw_expects_object) 10574ab2414f297fab1b290e77bfc3b049ccf45eda81Steve Naroff << ThrowExpr->getType() << ThrowExpr->getSourceRange()); 10587151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } 10597151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff } 10607151bbb55c8a437073e42f74348c3fd5f1d5b410Steve Naroff return Owned(new (Context) ObjCAtThrowStmt(AtLoc, ThrowExpr)); 106139f8f159c488a900e5958d5aab3e467af9ec8a2bFariborz Jahanian} 1062bd49a647afd9cc534fef13cadf652d4e9c396e2bFariborz Jahanian 1063431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlAction::OwningStmtResult 1064431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian RedlSema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, ExprArg SynchExpr, 1065431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl StmtArg SynchBody) { 10668189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) ObjCAtSynchronizedStmt(AtLoc, 1067431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl static_cast<Stmt*>(SynchExpr.release()), 1068431e90e887c21c0d0d56fc12a2d359df8d53ea66Sebastian Redl static_cast<Stmt*>(SynchBody.release()))); 1069fa3ee8e6776634caf064ba5928ca7699d317a280Fariborz Jahanian} 10704b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl 10714b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// ActOnCXXCatchBlock - Takes an exception declaration and a handler block 10724b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl/// and creates a proper catch handler from them. 10734b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian RedlAction::OwningStmtResult 10744b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian RedlSema::ActOnCXXCatchBlock(SourceLocation CatchLoc, DeclTy *ExDecl, 10754b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl StmtArg HandlerBlock) { 10764b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl // There's nothing to test that ActOnExceptionDecl didn't already test. 10778189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXCatchStmt(CatchLoc, 10788189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<VarDecl*>(ExDecl), 10798189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(HandlerBlock.release()))); 10804b07b2968f87f3cd5a3d8c76145f1cbfd718d42dSebastian Redl} 10818351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 10828351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// ActOnCXXTryBlock - Takes a try compound-statement and a number of 10838351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl/// handlers and creates a try statement from them. 10848351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlAction::OwningStmtResult 10858351da06ca3082dfd49dd8e3c1785a986920f57cSebastian RedlSema::ActOnCXXTryBlock(SourceLocation TryLoc, StmtArg TryBlock, 10868351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl MultiStmtArg RawHandlers) { 10878351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl unsigned NumHandlers = RawHandlers.size(); 10888351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl assert(NumHandlers > 0 && 10898351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl "The parser shouldn't call this if there are no handlers."); 10908351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl Stmt **Handlers = reinterpret_cast<Stmt**>(RawHandlers.get()); 10918351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 10928351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl for(unsigned i = 0; i < NumHandlers - 1; ++i) { 10938351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl CXXCatchStmt *Handler = llvm::cast<CXXCatchStmt>(Handlers[i]); 10948351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl if (!Handler->getExceptionDecl()) 10958351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl return StmtError(Diag(Handler->getLocStart(), diag::err_early_catch_all)); 10968351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl } 10978351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers for the same type as an earlier one. 10988351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // This one is rather easy. 10998351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // FIXME: We should detect handlers that cannot catch anything because an 11008351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // earlier handler catches a superclass. Need to find a method that is not 11018351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // quadratic for this. 11028351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // Neither of these are explicitly forbidden, but every compiler detects them 11038351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl // and warns. 11048351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl 11058351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl RawHandlers.release(); 11068189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek return Owned(new (Context) CXXTryStmt(TryLoc, 11078189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek static_cast<Stmt*>(TryBlock.release()), 11088189cde56b4f6f938cd65f53c932fe1860d0204cTed Kremenek Handlers, NumHandlers)); 11098351da06ca3082dfd49dd8e3c1785a986920f57cSebastian Redl} 1110