CGExprScalar.cpp revision a36bf8f74180e834c6bf2db867796fd5338495ab
17f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===--- CGExprScalar.cpp - Emit LLVM Code for Scalar Exprs ---------------===// 27f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// 37f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// The LLVM Compiler Infrastructure 47f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 77f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// 87f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 97f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// 107f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// This contains code to emit Expr nodes with scalar LLVM types as LLVM code. 117f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// 127f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 147f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#include "CodeGenFunction.h" 15f7bcc7e6c803a2b2f7b7f7fdfb2506dd25ec6de8Fariborz Jahanian#include "CGObjCRuntime.h" 167f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#include "CodeGenModule.h" 17de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/ASTContext.h" 1898c5ead87d720d8b68b6f236c3c3579a388fc882Daniel Dunbar#include "clang/AST/DeclObjC.h" 1919cc4abea06a9b49e0e16a50d335c064cd723572Anders Carlsson#include "clang/AST/RecordLayout.h" 20de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/StmtVisitor.h" 2125ddea7f7835c4b1804e458a5c866cde0097430aChris Lattner#include "clang/Basic/TargetInfo.h" 227f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#include "llvm/Constants.h" 237f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#include "llvm/Function.h" 2485f9bceab1542aafff012d4d28e998f4ba16e362Anders Carlsson#include "llvm/GlobalVariable.h" 257c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson#include "llvm/Intrinsics.h" 262add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump#include "llvm/Module.h" 277f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#include "llvm/Support/Compiler.h" 28f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner#include "llvm/Support/CFG.h" 294e7a1f7682d94811bd41fca8aefccc38f686db23Mike Stump#include "llvm/Target/TargetData.h" 30c89bf69c9289d2b2305f2c267daacc7312391898Chris Lattner#include <cstdarg> 316aad91a43e26118c824d976661077819265d9bc0Ted Kremenek 327f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerusing namespace clang; 337f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerusing namespace CodeGen; 347f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerusing llvm::Value; 357f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 367f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 377f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Scalar Expression Emitter 387f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 397f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 407f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerstruct BinOpInfo { 417f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *LHS; 427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHS; 431f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner QualType Ty; // Computation Type. 447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner const BinaryOperator *E; 457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner}; 467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnernamespace { 487f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerclass VISIBILITY_HIDDEN ScalarExprEmitter 497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner : public StmtVisitor<ScalarExprEmitter, Value*> { 507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CodeGenFunction &CGF; 5145d196b8387dcefc4df26cda114fa34c6528e928Daniel Dunbar CGBuilderTy &Builder; 527f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool IgnoreResultAssign; 53a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::LLVMContext &VMContext; 547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerpublic: 557f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 567f79f9be5916c51c35da4f126b7c12596a101607Mike Stump ScalarExprEmitter(CodeGenFunction &cgf, bool ira=false) 57db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump : CGF(cgf), Builder(CGF.Builder), IgnoreResultAssign(ira), 58a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson VMContext(cgf.getLLVMContext()) { 597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 60db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner //===--------------------------------------------------------------------===// 627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Utilities 637f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner //===--------------------------------------------------------------------===// 647f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 657f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool TestAndClearIgnoreResultAssign() { 669c10fcfc3b9d2076efe701b60644a9987a93c503Chris Lattner bool I = IgnoreResultAssign; 679c10fcfc3b9d2076efe701b60644a9987a93c503Chris Lattner IgnoreResultAssign = false; 689c10fcfc3b9d2076efe701b60644a9987a93c503Chris Lattner return I; 699c10fcfc3b9d2076efe701b60644a9987a93c503Chris Lattner } 707f79f9be5916c51c35da4f126b7c12596a101607Mike Stump 717f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner const llvm::Type *ConvertType(QualType T) { return CGF.ConvertType(T); } 727f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LValue EmitLValue(const Expr *E) { return CGF.EmitLValue(E); } 737f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 747f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitLoadOfLValue(LValue LV, QualType T) { 759b65551d0b387a7597fb39356a4d8ef10046445eChris Lattner return CGF.EmitLoadOfLValue(LV, T).getScalarVal(); 767f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 77db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 787f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner /// EmitLoadOfLValue - Given an expression with complex type that represents a 797f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner /// value l-value, this method emits the address of the l-value, then loads 807f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner /// and returns the result. 817f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitLoadOfLValue(const Expr *E) { 827f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitLoadOfLValue(EmitLValue(E), E->getType()); 837f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 84db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 859abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner /// EmitConversionToBool - Convert the specified expression value to a 863420d0de2c52fedf771d7ef20522f6080233e377Chris Lattner /// boolean (i1) truth value. This is equivalent to "Val != 0". 879abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner Value *EmitConversionToBool(Value *Src, QualType DstTy); 88db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 893707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner /// EmitScalarConversion - Emit a conversion from the specified type to the 903707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner /// specified destination type, both of which are LLVM scalar types. 914f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner Value *EmitScalarConversion(Value *Src, QualType SrcTy, QualType DstTy); 924f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner 934f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner /// EmitComplexToScalarConversion - Emit a conversion from the specified 94db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump /// complex type to the specified destination type, where the destination type 95db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump /// is an LLVM scalar type. 964f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner Value *EmitComplexToScalarConversion(CodeGenFunction::ComplexPairTy Src, 974f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType SrcTy, QualType DstTy); 98df6b68c9487aed2042c7fc23db10a79f89083a11Mike Stump 997f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner //===--------------------------------------------------------------------===// 1007f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Visitor Methods 1017f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner //===--------------------------------------------------------------------===// 1027f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1037f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitStmt(Stmt *S) { 1047a9d49fd2bfac00e905b361ba76d26ab5b6c3b09Ted Kremenek S->dump(CGF.getContext().getSourceManager()); 1057f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner assert(0 && "Stmt can't have complex result type!"); 1067f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return 0; 1077f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1087f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitExpr(Expr *S); 109f51dc64f90851f636302dbaaf3f52c0524cdac36Fariborz Jahanian 1107f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitParenExpr(ParenExpr *PE) { return Visit(PE->getSubExpr()); } 1117f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1127f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Leaves. 1137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitIntegerLiteral(const IntegerLiteral *E) { 1144a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson return llvm::ConstantInt::get(VMContext, E->getValue()); 1157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1167f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitFloatingLiteral(const FloatingLiteral *E) { 117bc0a2226c7fcd18b29b6846049e2cfcb872d3593Owen Anderson return llvm::ConstantFP::get(VMContext, E->getValue()); 1187f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1197f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitCharacterLiteral(const CharacterLiteral *E) { 1204a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); 121e7579b57eb3eabfd3545b86320fb67466730e9fcNate Begeman } 122e7579b57eb3eabfd3545b86320fb67466730e9fcNate Begeman Value *VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 1234a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); 1247f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1257267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis Value *VisitCXXZeroInitValueExpr(const CXXZeroInitValueExpr *E) { 126c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson return llvm::Constant::getNullValue(ConvertType(E->getType())); 1277267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis } 1283f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson Value *VisitGNUNullExpr(const GNUNullExpr *E) { 129c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson return llvm::Constant::getNullValue(ConvertType(E->getType())); 1303f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 1317f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitTypesCompatibleExpr(const TypesCompatibleExpr *E) { 1324a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson return llvm::ConstantInt::get(ConvertType(E->getType()), 133ec0550fa3653d46560bf4484a2e988329c228e39Steve Naroff CGF.getContext().typesAreCompatible( 134ec0550fa3653d46560bf4484a2e988329c228e39Steve Naroff E->getArgType1(), E->getArgType2())); 1357f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1360518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Value *VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E); 1370ffb125996336fc7602b162c0a9e392f1a93060fDaniel Dunbar Value *VisitAddrLabelExpr(const AddrLabelExpr *E) { 138d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner llvm::Value *V = CGF.GetAddrOfLabel(E->getLabel()); 139d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner return Builder.CreateBitCast(V, ConvertType(E->getType())); 1400ffb125996336fc7602b162c0a9e392f1a93060fDaniel Dunbar } 141db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // l-values. 1437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitDeclRefExpr(DeclRefExpr *E) { 1447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (const EnumConstantDecl *EC = dyn_cast<EnumConstantDecl>(E->getDecl())) 1454a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson return llvm::ConstantInt::get(VMContext, EC->getInitVal()); 1467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitLoadOfLValue(E); 1477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 148db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump Value *VisitObjCSelectorExpr(ObjCSelectorExpr *E) { 149db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump return CGF.EmitObjCSelectorExpr(E); 1509c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar } 151db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump Value *VisitObjCProtocolExpr(ObjCProtocolExpr *E) { 152db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump return CGF.EmitObjCProtocolExpr(E); 1539c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar } 154db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump Value *VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { 1559c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar return EmitLoadOfLValue(E); 1569c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar } 1570a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar Value *VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 15885c59edda02df48fae8dc85049743319bc6e7e89Daniel Dunbar return EmitLoadOfLValue(E); 1599c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar } 16009105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian Value *VisitObjCImplicitSetterGetterRefExpr( 16109105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian ObjCImplicitSetterGetterRefExpr *E) { 16243f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian return EmitLoadOfLValue(E); 16343f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian } 1649c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar Value *VisitObjCMessageExpr(ObjCMessageExpr *E) { 1659c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar return CGF.EmitObjCMessageExpr(E).getScalarVal(); 1660a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar } 1670a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar 1687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitArraySubscriptExpr(ArraySubscriptExpr *E); 169d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman Value *VisitShuffleVectorExpr(ShuffleVectorExpr *E); 1707f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitMemberExpr(Expr *E) { return EmitLoadOfLValue(E); } 171213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman Value *VisitExtVectorElementExpr(Expr *E) { return EmitLoadOfLValue(E); } 172be20bb558cae5352898e6a913e29d24d20134841Chris Lattner Value *VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 173be20bb558cae5352898e6a913e29d24d20134841Chris Lattner return EmitLoadOfLValue(E); 174be20bb558cae5352898e6a913e29d24d20134841Chris Lattner } 1757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitStringLiteral(Expr *E) { return EmitLValue(E).getAddress(); } 176eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner Value *VisitObjCEncodeExpr(const ObjCEncodeExpr *E) { 177eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return EmitLValue(E).getAddress(); 178eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner } 179db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 180d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner Value *VisitPredefinedExpr(Expr *E) { return EmitLValue(E).getAddress(); } 18135634f5ed67966c9f1fde38420e79cc6515cd673Devang Patel 1820533b3020ca39898751d4200feed776861dcd1ceNate Begeman Value *VisitInitListExpr(InitListExpr *E); 183db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1843498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor Value *VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 185c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson return llvm::Constant::getNullValue(ConvertType(E->getType())); 1863498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor } 187c62aad8f45ec3dd893376bd1c51e5e8019a76d8eEli Friedman Value *VisitCastExpr(const CastExpr *E) { 188c62aad8f45ec3dd893376bd1c51e5e8019a76d8eEli Friedman // Make sure to evaluate VLA bounds now so that we have them for later. 189c62aad8f45ec3dd893376bd1c51e5e8019a76d8eEli Friedman if (E->getType()->isVariablyModifiedType()) 190c62aad8f45ec3dd893376bd1c51e5e8019a76d8eEli Friedman CGF.EmitVLASize(E->getType()); 191c62aad8f45ec3dd893376bd1c51e5e8019a76d8eEli Friedman 192592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson return EmitCastExpr(E); 1937f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 194592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson Value *EmitCastExpr(const CastExpr *E); 1957f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1967f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitCallExpr(const CallExpr *E) { 197e9f2f45fe9bf79bd4aea47fa1ad9204b68510fd9Anders Carlsson if (E->getCallReturnType()->isReferenceType()) 198e9f2f45fe9bf79bd4aea47fa1ad9204b68510fd9Anders Carlsson return EmitLoadOfLValue(E); 199db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 2009b65551d0b387a7597fb39356a4d8ef10046445eChris Lattner return CGF.EmitCallExpr(E).getScalarVal(); 2017f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2028f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar 2033379320c10001d7e1ee5d7e7142c417f797cfe82Chris Lattner Value *VisitStmtExpr(const StmtExpr *E); 2044e7a1f7682d94811bd41fca8aefccc38f686db23Mike Stump 205a99038c0757a836c6faeeddaa5dfd249b32f6e9eMike Stump Value *VisitBlockDeclRefExpr(const BlockDeclRefExpr *E); 206db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 2077f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Unary Operators. 2087f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitPrePostIncDec(const UnaryOperator *E, bool isInc, bool isPre); 2097f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryPostDec(const UnaryOperator *E) { 2107f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return VisitPrePostIncDec(E, false, false); 2117f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2127f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryPostInc(const UnaryOperator *E) { 2137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return VisitPrePostIncDec(E, true, false); 2147f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryPreDec(const UnaryOperator *E) { 2167f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return VisitPrePostIncDec(E, false, true); 2177f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2187f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryPreInc(const UnaryOperator *E) { 2197f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return VisitPrePostIncDec(E, true, true); 2207f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2217f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryAddrOf(const UnaryOperator *E) { 2227f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitLValue(E->getSubExpr()).getAddress(); 2237f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2247f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryDeref(const Expr *E) { return EmitLoadOfLValue(E); } 2257f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryPlus(const UnaryOperator *E) { 2267f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // This differs from gcc, though, most likely due to a bug in gcc. 2277f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 2287f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Visit(E->getSubExpr()); 2297f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2307f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryMinus (const UnaryOperator *E); 2317f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryNot (const UnaryOperator *E); 2327f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryLNot (const UnaryOperator *E); 23346f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner Value *VisitUnaryReal (const UnaryOperator *E); 23446f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner Value *VisitUnaryImag (const UnaryOperator *E); 2357f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryExtension(const UnaryOperator *E) { 2367f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Visit(E->getSubExpr()); 2377f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2385a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson Value *VisitUnaryOffsetOf(const UnaryOperator *E); 239db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 2405f4307b7ba164b03c853c8d3eb4674d33f8967a6Anders Carlsson // C++ 24104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Value *VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { 24204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return Visit(DAE->getExpr()); 24304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner } 2445f4307b7ba164b03c853c8d3eb4674d33f8967a6Anders Carlsson Value *VisitCXXThisExpr(CXXThisExpr *TE) { 2455f4307b7ba164b03c853c8d3eb4674d33f8967a6Anders Carlsson return CGF.LoadCXXThis(); 246db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump } 247db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 2487f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson Value *VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) { 2493082463f4f387b725f4e4bf7d7b46269d445e4f5Anders Carlsson return CGF.EmitCXXExprWithTemporaries(E).getScalarVal(); 2507f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson } 251a00703dccbdc6cc4a293db38477dea7db5538c7eAnders Carlsson Value *VisitCXXNewExpr(const CXXNewExpr *E) { 252a00703dccbdc6cc4a293db38477dea7db5538c7eAnders Carlsson return CGF.EmitCXXNewExpr(E); 253a00703dccbdc6cc4a293db38477dea7db5538c7eAnders Carlsson } 25460e282cc1e508be327b0481cecedc206873cb86aAnders Carlsson Value *VisitCXXDeleteExpr(const CXXDeleteExpr *E) { 25560e282cc1e508be327b0481cecedc206873cb86aAnders Carlsson CGF.EmitCXXDeleteExpr(E); 25660e282cc1e508be327b0481cecedc206873cb86aAnders Carlsson return 0; 25760e282cc1e508be327b0481cecedc206873cb86aAnders Carlsson } 258db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 259a71d819bb8f50c28938db0f2867d3fb6e2ce5910Douglas Gregor Value *VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *E) { 260a71d819bb8f50c28938db0f2867d3fb6e2ce5910Douglas Gregor // C++ [expr.pseudo]p1: 261db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // The result shall only be used as the operand for the function call 262a71d819bb8f50c28938db0f2867d3fb6e2ce5910Douglas Gregor // operator (), and the result of such a call has type void. The only 263a71d819bb8f50c28938db0f2867d3fb6e2ce5910Douglas Gregor // effect is the evaluation of the postfix-expression before the dot or 264a71d819bb8f50c28938db0f2867d3fb6e2ce5910Douglas Gregor // arrow. 265a71d819bb8f50c28938db0f2867d3fb6e2ce5910Douglas Gregor CGF.EmitScalarExpr(E->getBase()); 266a71d819bb8f50c28938db0f2867d3fb6e2ce5910Douglas Gregor return 0; 267a71d819bb8f50c28938db0f2867d3fb6e2ce5910Douglas Gregor } 268db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 269c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson Value *VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *E) { 270c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson return llvm::Constant::getNullValue(ConvertType(E->getType())); 271c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson } 272756b5c4f9d52642d87d1948bee58f97a4f795b24Anders Carlsson 273756b5c4f9d52642d87d1948bee58f97a4f795b24Anders Carlsson Value *VisitCXXThrowExpr(const CXXThrowExpr *E) { 274756b5c4f9d52642d87d1948bee58f97a4f795b24Anders Carlsson CGF.EmitCXXThrowExpr(E); 275756b5c4f9d52642d87d1948bee58f97a4f795b24Anders Carlsson return 0; 276756b5c4f9d52642d87d1948bee58f97a4f795b24Anders Carlsson } 277756b5c4f9d52642d87d1948bee58f97a4f795b24Anders Carlsson 2787f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Binary Operators. 2797f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitMul(const BinOpInfo &Ops) { 280035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump if (CGF.getContext().getLangOptions().OverflowChecking 281035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump && Ops.Ty->isSignedIntegerType()) 2822add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump return EmitOverflowCheckedBinOp(Ops); 28387415d2d45224596a96ef02310701797d56b2c19Chris Lattner if (Ops.LHS->getType()->isFPOrFPVector()) 28487415d2d45224596a96ef02310701797d56b2c19Chris Lattner return Builder.CreateFMul(Ops.LHS, Ops.RHS, "mul"); 2857f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateMul(Ops.LHS, Ops.RHS, "mul"); 2867f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2872add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump /// Create a binary op that checks for overflow. 2882add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump /// Currently only supports +, - and *. 2892add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Value *EmitOverflowCheckedBinOp(const BinOpInfo &Ops); 2907f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitDiv(const BinOpInfo &Ops); 2917f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitRem(const BinOpInfo &Ops); 2927f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitAdd(const BinOpInfo &Ops); 2937f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitSub(const BinOpInfo &Ops); 2947f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitShl(const BinOpInfo &Ops); 2957f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitShr(const BinOpInfo &Ops); 2967f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitAnd(const BinOpInfo &Ops) { 2977f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateAnd(Ops.LHS, Ops.RHS, "and"); 2987f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2997f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitXor(const BinOpInfo &Ops) { 3007f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateXor(Ops.LHS, Ops.RHS, "xor"); 3017f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 3027f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitOr (const BinOpInfo &Ops) { 3037f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateOr(Ops.LHS, Ops.RHS, "or"); 3047f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 3057f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 3061f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner BinOpInfo EmitBinOps(const BinaryOperator *E); 3073ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner Value *EmitCompoundAssign(const CompoundAssignOperator *E, 3081f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner Value *(ScalarExprEmitter::*F)(const BinOpInfo &)); 3091f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 3101f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner // Binary operators and binary compound assignment operators. 3111f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner#define HANDLEBINOP(OP) \ 3123ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner Value *VisitBin ## OP(const BinaryOperator *E) { \ 3133ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner return Emit ## OP(EmitBinOps(E)); \ 3143ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner } \ 3153ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner Value *VisitBin ## OP ## Assign(const CompoundAssignOperator *E) { \ 3163ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner return EmitCompoundAssign(E, &ScalarExprEmitter::Emit ## OP); \ 3171f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner } 3181f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Mul); 3191f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Div); 3201f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Rem); 3211f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Add); 3228c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar HANDLEBINOP(Sub); 3231f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Shl); 3241f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Shr); 3251f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(And); 3261f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Xor); 3271f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Or); 3281f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner#undef HANDLEBINOP 3298c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar 3307f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Comparisons. 3317f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitCompare(const BinaryOperator *E, unsigned UICmpOpc, 3327f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner unsigned SICmpOpc, unsigned FCmpOpc); 3337f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#define VISITCOMP(CODE, UI, SI, FP) \ 3347f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitBin##CODE(const BinaryOperator *E) { \ 3357f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitCompare(E, llvm::ICmpInst::UI, llvm::ICmpInst::SI, \ 3367f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner llvm::FCmpInst::FP); } 3377f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(LT, ICMP_ULT, ICMP_SLT, FCMP_OLT); 3387f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(GT, ICMP_UGT, ICMP_SGT, FCMP_OGT); 3397f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(LE, ICMP_ULE, ICMP_SLE, FCMP_OLE); 3407f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(GE, ICMP_UGE, ICMP_SGE, FCMP_OGE); 3417f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(EQ, ICMP_EQ , ICMP_EQ , FCMP_OEQ); 3427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(NE, ICMP_NE , ICMP_NE , FCMP_UNE); 3437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#undef VISITCOMP 344db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 3457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitBinAssign (const BinaryOperator *E); 3467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 3477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitBinLAnd (const BinaryOperator *E); 3487f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitBinLOr (const BinaryOperator *E); 3497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitBinComma (const BinaryOperator *E); 3507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 35125b825d1a48fb4d64cb553bef7a316469e89c46aEli Friedman Value *VisitBinPtrMemD(const Expr *E) { return EmitLoadOfLValue(E); } 35225b825d1a48fb4d64cb553bef7a316469e89c46aEli Friedman Value *VisitBinPtrMemI(const Expr *E) { return EmitLoadOfLValue(E); } 35325b825d1a48fb4d64cb553bef7a316469e89c46aEli Friedman 3547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Other Operators. 355df6b68c9487aed2042c7fc23db10a79f89083a11Mike Stump Value *VisitBlockExpr(const BlockExpr *BE); 3567f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitConditionalOperator(const ConditionalOperator *CO); 3577f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitChooseExpr(ChooseExpr *CE); 3587c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson Value *VisitVAArgExpr(VAArgExpr *VE); 3597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitObjCStringLiteral(const ObjCStringLiteral *E) { 3607f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return CGF.EmitObjCStringLiteral(E); 3617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 3627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner}; 3637f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} // end anonymous namespace. 3647f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 3657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 3667f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Utilities 3677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 3687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 3699abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner/// EmitConversionToBool - Convert the specified expression value to a 3703420d0de2c52fedf771d7ef20522f6080233e377Chris Lattner/// boolean (i1) truth value. This is equivalent to "Val != 0". 3719abc84e7ac4db891209fe67cc3a8c9690dc886efChris LattnerValue *ScalarExprEmitter::EmitConversionToBool(Value *Src, QualType SrcType) { 372467b27b9a24bdc823218ad1ad0e37673b6cc1e83John McCall assert(SrcType.isCanonical() && "EmitScalarConversion strips typedefs"); 373db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 3749abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner if (SrcType->isRealFloatingType()) { 3759abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner // Compare against 0.0 for fp scalars. 376c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson llvm::Value *Zero = llvm::Constant::getNullValue(Src->getType()); 3779abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner return Builder.CreateFCmpUNE(Src, Zero, "tobool"); 3789abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner } 379db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 380237957c45774713f81fbd5394b3db4317fef0938Anders Carlsson if (SrcType->isMemberPointerType()) { 381237957c45774713f81fbd5394b3db4317fef0938Anders Carlsson // FIXME: This is ABI specific. 382db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 383237957c45774713f81fbd5394b3db4317fef0938Anders Carlsson // Compare against -1. 384237957c45774713f81fbd5394b3db4317fef0938Anders Carlsson llvm::Value *NegativeOne = llvm::Constant::getAllOnesValue(Src->getType()); 385237957c45774713f81fbd5394b3db4317fef0938Anders Carlsson return Builder.CreateICmpNE(Src, NegativeOne, "tobool"); 386237957c45774713f81fbd5394b3db4317fef0938Anders Carlsson } 387db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 388d1d66bcd6914ff82abdfa88dd25bb0b74cde3b99Daniel Dunbar assert((SrcType->isIntegerType() || isa<llvm::PointerType>(Src->getType())) && 3899abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner "Unknown scalar type to convert"); 390db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 3919abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner // Because of the type rules of C, we often end up computing a logical value, 3929abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner // then zero extending it to int, then wanting it as a logical value again. 3939abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner // Optimize this common case. 3949abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner if (llvm::ZExtInst *ZI = dyn_cast<llvm::ZExtInst>(Src)) { 3950032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson if (ZI->getOperand(0)->getType() == 3960032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Type::getInt1Ty(CGF.getLLVMContext())) { 3979abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner Value *Result = ZI->getOperand(0); 398356916ec84826a793b0353e5db0e9a7589b9ec5cEli Friedman // If there aren't any more uses, zap the instruction to save space. 399356916ec84826a793b0353e5db0e9a7589b9ec5cEli Friedman // Note that there can be more uses, for example if this 400356916ec84826a793b0353e5db0e9a7589b9ec5cEli Friedman // is the result of an assignment. 401356916ec84826a793b0353e5db0e9a7589b9ec5cEli Friedman if (ZI->use_empty()) 402356916ec84826a793b0353e5db0e9a7589b9ec5cEli Friedman ZI->eraseFromParent(); 4039abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner return Result; 4049abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner } 4059abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner } 406db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 4079abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner // Compare against an integer or pointer null. 408c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson llvm::Value *Zero = llvm::Constant::getNullValue(Src->getType()); 4099abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner return Builder.CreateICmpNE(Src, Zero, "tobool"); 4109abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner} 4119abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner 4123707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner/// EmitScalarConversion - Emit a conversion from the specified type to the 4133707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner/// specified destination type, both of which are LLVM scalar types. 4144f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris LattnerValue *ScalarExprEmitter::EmitScalarConversion(Value *Src, QualType SrcType, 4154f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType DstType) { 4169619662a1d42e2008b865d3459c0677e149dad1bChris Lattner SrcType = CGF.getContext().getCanonicalType(SrcType); 4179619662a1d42e2008b865d3459c0677e149dad1bChris Lattner DstType = CGF.getContext().getCanonicalType(DstType); 4183707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner if (SrcType == DstType) return Src; 419db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 420cf289083ab007264fa3ea96d92f133339aee5d2dChris Lattner if (DstType->isVoidType()) return 0; 421db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 4220032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::LLVMContext &VMContext = CGF.getLLVMContext(); 4233707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 4243707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // Handle conversions to bool first, they are special: comparisons against 0. 425ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner if (DstType->isBooleanType()) 426ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner return EmitConversionToBool(Src, SrcType); 427db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 4283707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner const llvm::Type *DstTy = ConvertType(DstType); 4293707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 4303707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // Ignore conversions like int -> uint. 4313707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner if (Src->getType() == DstTy) 4323707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner return Src; 4333707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 434db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // Handle pointer conversions next: pointers can only be converted to/from 435db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // other pointers and integers. Check for pointer types in terms of LLVM, as 436db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // some native types (like Obj-C id) may map to a pointer type. 437270cc66683b22d6bb0b4644f5a40f84d45edf119Daniel Dunbar if (isa<llvm::PointerType>(DstTy)) { 4383707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // The source value may be an integer, or a pointer. 439191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson if (isa<llvm::PointerType>(Src->getType())) 4403707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner return Builder.CreateBitCast(Src, DstTy, "conv"); 441191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson 4423707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner assert(SrcType->isIntegerType() && "Not ptr->ptr or int->ptr conversion?"); 44325615424741bcce31fe52c896f76268f0307f00dEli Friedman // First, convert to the correct width so that we control the kind of 44425615424741bcce31fe52c896f76268f0307f00dEli Friedman // extension. 445db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump const llvm::Type *MiddleTy = 4460032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::IntegerType::get(VMContext, CGF.LLVMPointerWidth); 44725615424741bcce31fe52c896f76268f0307f00dEli Friedman bool InputSigned = SrcType->isSignedIntegerType(); 44825615424741bcce31fe52c896f76268f0307f00dEli Friedman llvm::Value* IntResult = 44925615424741bcce31fe52c896f76268f0307f00dEli Friedman Builder.CreateIntCast(Src, MiddleTy, InputSigned, "conv"); 45025615424741bcce31fe52c896f76268f0307f00dEli Friedman // Then, cast to pointer. 45125615424741bcce31fe52c896f76268f0307f00dEli Friedman return Builder.CreateIntToPtr(IntResult, DstTy, "conv"); 4523707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner } 453db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 454270cc66683b22d6bb0b4644f5a40f84d45edf119Daniel Dunbar if (isa<llvm::PointerType>(Src->getType())) { 4553707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // Must be an ptr to int cast. 4563707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner assert(isa<llvm::IntegerType>(DstTy) && "not ptr->int?"); 45750b5a30db40322880340e957ad7d6d8d60bb4c5bAnders Carlsson return Builder.CreatePtrToInt(Src, DstTy, "conv"); 4583707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner } 459db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 460213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman // A scalar can be splatted to an extended vector of the same element type 4612ef13e5abef0570a9f567b4671367275c05d4d34Nate Begeman if (DstType->isExtVectorType() && !SrcType->isVectorType()) { 4626fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman // Cast the scalar to element type 463183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall QualType EltTy = DstType->getAs<ExtVectorType>()->getElementType(); 4646fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman llvm::Value *Elt = EmitScalarConversion(Src, SrcType, EltTy); 4656fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman 4666fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman // Insert the element in element zero of an undef vector 46703e205031b08669f05c41eed5b896fc94c4a12bbOwen Anderson llvm::Value *UnV = llvm::UndefValue::get(DstTy); 4680032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Value *Idx = 4690032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 0); 4706fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman UnV = Builder.CreateInsertElement(UnV, Elt, Idx, "tmp"); 4716fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman 4726fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman // Splat the element across to all elements 4736fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman llvm::SmallVector<llvm::Constant*, 16> Args; 4746fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman unsigned NumElements = cast<llvm::VectorType>(DstTy)->getNumElements(); 4756fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman for (unsigned i = 0; i < NumElements; i++) 4760032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson Args.push_back(llvm::ConstantInt::get( 4770032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Type::getInt32Ty(VMContext), 0)); 478db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 4794a28932dba03132dabbe70abdadcaae468dd7933Owen Anderson llvm::Constant *Mask = llvm::ConstantVector::get(&Args[0], NumElements); 4806fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman llvm::Value *Yay = Builder.CreateShuffleVector(UnV, UnV, Mask, "splat"); 4816fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman return Yay; 4826fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman } 4834119d1aeca8016654d381ce079864058d1709571Nate Begeman 4843b1ae004d0ee88fc029dad876ec5695f178ef3f6Chris Lattner // Allow bitcast from vector to integer/fp of the same size. 4857019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson if (isa<llvm::VectorType>(Src->getType()) || 4863b1ae004d0ee88fc029dad876ec5695f178ef3f6Chris Lattner isa<llvm::VectorType>(DstTy)) 4877019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson return Builder.CreateBitCast(Src, DstTy, "conv"); 488db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 4893707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // Finally, we have the arithmetic types: real int/float. 4903707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner if (isa<llvm::IntegerType>(Src->getType())) { 4913707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner bool InputSigned = SrcType->isSignedIntegerType(); 492b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson if (isa<llvm::IntegerType>(DstTy)) 493b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateIntCast(Src, DstTy, InputSigned, "conv"); 494b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson else if (InputSigned) 495b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateSIToFP(Src, DstTy, "conv"); 496b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson else 497b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateUIToFP(Src, DstTy, "conv"); 4983707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner } 499db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 5003707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner assert(Src->getType()->isFloatingPoint() && "Unknown real conversion"); 5013707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner if (isa<llvm::IntegerType>(DstTy)) { 502b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson if (DstType->isSignedIntegerType()) 503b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateFPToSI(Src, DstTy, "conv"); 504b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson else 505b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateFPToUI(Src, DstTy, "conv"); 5063707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner } 5073707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 5083707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner assert(DstTy->isFloatingPoint() && "Unknown real conversion"); 509b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson if (DstTy->getTypeID() < Src->getType()->getTypeID()) 510b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateFPTrunc(Src, DstTy, "conv"); 511b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson else 512b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateFPExt(Src, DstTy, "conv"); 5133707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner} 5143707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 515db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump/// EmitComplexToScalarConversion - Emit a conversion from the specified complex 516db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump/// type to the specified destination type, where the destination type is an 517db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump/// LLVM scalar type. 5184f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris LattnerValue *ScalarExprEmitter:: 5194f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris LattnerEmitComplexToScalarConversion(CodeGenFunction::ComplexPairTy Src, 5204f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType SrcTy, QualType DstTy) { 521ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner // Get the source element type. 522183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall SrcTy = SrcTy->getAs<ComplexType>()->getElementType(); 523db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 524ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner // Handle conversions to bool first, they are special: comparisons against 0. 525ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner if (DstTy->isBooleanType()) { 526ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner // Complex != 0 -> (Real != 0) | (Imag != 0) 527ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner Src.first = EmitScalarConversion(Src.first, SrcTy, DstTy); 528ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner Src.second = EmitScalarConversion(Src.second, SrcTy, DstTy); 529ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner return Builder.CreateOr(Src.first, Src.second, "tobool"); 530ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner } 531db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 5324f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner // C99 6.3.1.7p2: "When a value of complex type is converted to a real type, 5334f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner // the imaginary part of the complex value is discarded and the value of the 5344f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner // real part is converted according to the conversion rules for the 535db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // corresponding real type. 5364f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner return EmitScalarConversion(Src.first, SrcTy, DstTy); 5374f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner} 5384f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner 5394f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner 5407f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 5417f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Visitor Methods 5427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 5437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 5447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitExpr(Expr *E) { 545488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(E, "scalar expression"); 5467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (E->getType()->isVoidType()) 5477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return 0; 54803e205031b08669f05c41eed5b896fc94c4a12bbOwen Anderson return llvm::UndefValue::get(CGF.ConvertType(E->getType())); 5497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 5507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 551d38617c8a50f9729c254ab76cd359af797c6739bEli FriedmanValue *ScalarExprEmitter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) { 552d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman llvm::SmallVector<llvm::Constant*, 32> indices; 553d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman for (unsigned i = 2; i < E->getNumSubExprs(); i++) { 554d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman indices.push_back(cast<llvm::Constant>(CGF.EmitScalarExpr(E->getExpr(i)))); 555d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman } 556d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman Value* V1 = CGF.EmitScalarExpr(E->getExpr(0)); 557d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman Value* V2 = CGF.EmitScalarExpr(E->getExpr(1)); 5584a28932dba03132dabbe70abdadcaae468dd7933Owen Anderson Value* SV = llvm::ConstantVector::get(indices.begin(), indices.size()); 559d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman return Builder.CreateShuffleVector(V1, V2, SV, "shuffle"); 560d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman} 561d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman 5627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 5637f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 5647f79f9be5916c51c35da4f126b7c12596a101607Mike Stump 5657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Emit subscript expressions in rvalue context's. For most cases, this just 5667f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // loads the lvalue formed by the subscript expr. However, we have to be 5677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // careful, because the base of a vector subscript is occasionally an rvalue, 5687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // so we can't get it as an lvalue. 5697f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (!E->getBase()->getType()->isVectorType()) 5707f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitLoadOfLValue(E); 571db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 5727f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Handle the vector case. The base must be a vector, the index must be an 5737f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // integer value. 5747f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *Base = Visit(E->getBase()); 5757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *Idx = Visit(E->getIdx()); 576daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman bool IdxSigned = E->getIdx()->getType()->isSignedIntegerType(); 5770032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson Idx = Builder.CreateIntCast(Idx, 578db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump llvm::Type::getInt32Ty(CGF.getLLVMContext()), 5790032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson IdxSigned, 580515ff5a31d75df9f4f099458a31cd7a405cf513dEli Friedman "vecidxcast"); 5817f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateExtractElement(Base, Idx, "vecext"); 5827f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 5837f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 5840533b3020ca39898751d4200feed776861dcd1ceNate Begemanstatic llvm::Constant *getMaskElt(llvm::ShuffleVectorInst *SVI, unsigned Idx, 5850533b3020ca39898751d4200feed776861dcd1ceNate Begeman unsigned Off, const llvm::Type *I32Ty) { 5860533b3020ca39898751d4200feed776861dcd1ceNate Begeman int MV = SVI->getMaskValue(Idx); 5870533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (MV == -1) 5880533b3020ca39898751d4200feed776861dcd1ceNate Begeman return llvm::UndefValue::get(I32Ty); 5890533b3020ca39898751d4200feed776861dcd1ceNate Begeman return llvm::ConstantInt::get(I32Ty, Off+MV); 5900533b3020ca39898751d4200feed776861dcd1ceNate Begeman} 5910533b3020ca39898751d4200feed776861dcd1ceNate Begeman 5920533b3020ca39898751d4200feed776861dcd1ceNate BegemanValue *ScalarExprEmitter::VisitInitListExpr(InitListExpr *E) { 5930533b3020ca39898751d4200feed776861dcd1ceNate Begeman bool Ignore = TestAndClearIgnoreResultAssign(); 5940533b3020ca39898751d4200feed776861dcd1ceNate Begeman (void)Ignore; 5950533b3020ca39898751d4200feed776861dcd1ceNate Begeman assert (Ignore == false && "init list ignored"); 5960533b3020ca39898751d4200feed776861dcd1ceNate Begeman unsigned NumInitElements = E->getNumInits(); 5970533b3020ca39898751d4200feed776861dcd1ceNate Begeman 5980533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (E->hadArrayRangeDesignator()) 5990533b3020ca39898751d4200feed776861dcd1ceNate Begeman CGF.ErrorUnsupported(E, "GNU array range designator extension"); 6000533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6010533b3020ca39898751d4200feed776861dcd1ceNate Begeman const llvm::VectorType *VType = 6020533b3020ca39898751d4200feed776861dcd1ceNate Begeman dyn_cast<llvm::VectorType>(ConvertType(E->getType())); 6030533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6040533b3020ca39898751d4200feed776861dcd1ceNate Begeman // We have a scalar in braces. Just use the first element. 6050533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (!VType) 6060533b3020ca39898751d4200feed776861dcd1ceNate Begeman return Visit(E->getInit(0)); 6070533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6080533b3020ca39898751d4200feed776861dcd1ceNate Begeman unsigned ResElts = VType->getNumElements(); 6090533b3020ca39898751d4200feed776861dcd1ceNate Begeman const llvm::Type *I32Ty = llvm::Type::getInt32Ty(CGF.getLLVMContext()); 6100533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6110533b3020ca39898751d4200feed776861dcd1ceNate Begeman // Loop over initializers collecting the Value for each, and remembering 6120533b3020ca39898751d4200feed776861dcd1ceNate Begeman // whether the source was swizzle (ExtVectorElementExpr). This will allow 6130533b3020ca39898751d4200feed776861dcd1ceNate Begeman // us to fold the shuffle for the swizzle into the shuffle for the vector 6140533b3020ca39898751d4200feed776861dcd1ceNate Begeman // initializer, since LLVM optimizers generally do not want to touch 6150533b3020ca39898751d4200feed776861dcd1ceNate Begeman // shuffles. 6160533b3020ca39898751d4200feed776861dcd1ceNate Begeman unsigned CurIdx = 0; 6170533b3020ca39898751d4200feed776861dcd1ceNate Begeman bool VIsUndefShuffle = false; 6180533b3020ca39898751d4200feed776861dcd1ceNate Begeman llvm::Value *V = llvm::UndefValue::get(VType); 6190533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned i = 0; i != NumInitElements; ++i) { 6200533b3020ca39898751d4200feed776861dcd1ceNate Begeman Expr *IE = E->getInit(i); 6210533b3020ca39898751d4200feed776861dcd1ceNate Begeman Value *Init = Visit(IE); 6220533b3020ca39898751d4200feed776861dcd1ceNate Begeman llvm::SmallVector<llvm::Constant*, 16> Args; 6230533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6240533b3020ca39898751d4200feed776861dcd1ceNate Begeman const llvm::VectorType *VVT = dyn_cast<llvm::VectorType>(Init->getType()); 6250533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6260533b3020ca39898751d4200feed776861dcd1ceNate Begeman // Handle scalar elements. If the scalar initializer is actually one 6270533b3020ca39898751d4200feed776861dcd1ceNate Begeman // element of a different vector of the same width, use shuffle instead of 6280533b3020ca39898751d4200feed776861dcd1ceNate Begeman // extract+insert. 6290533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (!VVT) { 6300533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (isa<ExtVectorElementExpr>(IE)) { 6310533b3020ca39898751d4200feed776861dcd1ceNate Begeman llvm::ExtractElementInst *EI = cast<llvm::ExtractElementInst>(Init); 6320533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6330533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (EI->getVectorOperandType()->getNumElements() == ResElts) { 6340533b3020ca39898751d4200feed776861dcd1ceNate Begeman llvm::ConstantInt *C = cast<llvm::ConstantInt>(EI->getIndexOperand()); 6350533b3020ca39898751d4200feed776861dcd1ceNate Begeman Value *LHS = 0, *RHS = 0; 6360533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (CurIdx == 0) { 6370533b3020ca39898751d4200feed776861dcd1ceNate Begeman // insert into undef -> shuffle (src, undef) 6380533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(C); 6390533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = 1; j != ResElts; ++j) 6400533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(llvm::UndefValue::get(I32Ty)); 6410533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6420533b3020ca39898751d4200feed776861dcd1ceNate Begeman LHS = EI->getVectorOperand(); 6430533b3020ca39898751d4200feed776861dcd1ceNate Begeman RHS = V; 6440533b3020ca39898751d4200feed776861dcd1ceNate Begeman VIsUndefShuffle = true; 6450533b3020ca39898751d4200feed776861dcd1ceNate Begeman } else if (VIsUndefShuffle) { 6460533b3020ca39898751d4200feed776861dcd1ceNate Begeman // insert into undefshuffle && size match -> shuffle (v, src) 6470533b3020ca39898751d4200feed776861dcd1ceNate Begeman llvm::ShuffleVectorInst *SVV = cast<llvm::ShuffleVectorInst>(V); 6480533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = 0; j != CurIdx; ++j) 6490533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(getMaskElt(SVV, j, 0, I32Ty)); 6500533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(llvm::ConstantInt::get(I32Ty, 6510533b3020ca39898751d4200feed776861dcd1ceNate Begeman ResElts + C->getZExtValue())); 6520533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = CurIdx + 1; j != ResElts; ++j) 6530533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(llvm::UndefValue::get(I32Ty)); 6540533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6550533b3020ca39898751d4200feed776861dcd1ceNate Begeman LHS = cast<llvm::ShuffleVectorInst>(V)->getOperand(0); 6560533b3020ca39898751d4200feed776861dcd1ceNate Begeman RHS = EI->getVectorOperand(); 6570533b3020ca39898751d4200feed776861dcd1ceNate Begeman VIsUndefShuffle = false; 6580533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 6590533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (!Args.empty()) { 6600533b3020ca39898751d4200feed776861dcd1ceNate Begeman llvm::Constant *Mask = llvm::ConstantVector::get(&Args[0], ResElts); 6610533b3020ca39898751d4200feed776861dcd1ceNate Begeman V = Builder.CreateShuffleVector(LHS, RHS, Mask); 6620533b3020ca39898751d4200feed776861dcd1ceNate Begeman ++CurIdx; 6630533b3020ca39898751d4200feed776861dcd1ceNate Begeman continue; 6640533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 6650533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 6660533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 6670533b3020ca39898751d4200feed776861dcd1ceNate Begeman Value *Idx = llvm::ConstantInt::get(I32Ty, CurIdx); 6680533b3020ca39898751d4200feed776861dcd1ceNate Begeman V = Builder.CreateInsertElement(V, Init, Idx, "vecinit"); 6690533b3020ca39898751d4200feed776861dcd1ceNate Begeman VIsUndefShuffle = false; 6700533b3020ca39898751d4200feed776861dcd1ceNate Begeman ++CurIdx; 6710533b3020ca39898751d4200feed776861dcd1ceNate Begeman continue; 6720533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 6730533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6740533b3020ca39898751d4200feed776861dcd1ceNate Begeman unsigned InitElts = VVT->getNumElements(); 6750533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6760533b3020ca39898751d4200feed776861dcd1ceNate Begeman // If the initializer is an ExtVecEltExpr (a swizzle), and the swizzle's 6770533b3020ca39898751d4200feed776861dcd1ceNate Begeman // input is the same width as the vector being constructed, generate an 6780533b3020ca39898751d4200feed776861dcd1ceNate Begeman // optimized shuffle of the swizzle input into the result. 679a99f08351b6df3bb0f2947e038747717a60fd93aNate Begeman unsigned Offset = (CurIdx == 0) ? 0 : ResElts; 6800533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (isa<ExtVectorElementExpr>(IE)) { 6810533b3020ca39898751d4200feed776861dcd1ceNate Begeman llvm::ShuffleVectorInst *SVI = cast<llvm::ShuffleVectorInst>(Init); 6820533b3020ca39898751d4200feed776861dcd1ceNate Begeman Value *SVOp = SVI->getOperand(0); 6830533b3020ca39898751d4200feed776861dcd1ceNate Begeman const llvm::VectorType *OpTy = cast<llvm::VectorType>(SVOp->getType()); 6840533b3020ca39898751d4200feed776861dcd1ceNate Begeman 6850533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (OpTy->getNumElements() == ResElts) { 6860533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = 0; j != CurIdx; ++j) { 6870533b3020ca39898751d4200feed776861dcd1ceNate Begeman // If the current vector initializer is a shuffle with undef, merge 6880533b3020ca39898751d4200feed776861dcd1ceNate Begeman // this shuffle directly into it. 6890533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (VIsUndefShuffle) { 6900533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(getMaskElt(cast<llvm::ShuffleVectorInst>(V), j, 0, 6910533b3020ca39898751d4200feed776861dcd1ceNate Begeman I32Ty)); 6920533b3020ca39898751d4200feed776861dcd1ceNate Begeman } else { 6930533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(llvm::ConstantInt::get(I32Ty, j)); 6940533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 6950533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 6960533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = 0, je = InitElts; j != je; ++j) 6970533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(getMaskElt(SVI, j, Offset, I32Ty)); 6980533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = CurIdx + InitElts; j != ResElts; ++j) 6990533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(llvm::UndefValue::get(I32Ty)); 7000533b3020ca39898751d4200feed776861dcd1ceNate Begeman 7010533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (VIsUndefShuffle) 7020533b3020ca39898751d4200feed776861dcd1ceNate Begeman V = cast<llvm::ShuffleVectorInst>(V)->getOperand(0); 7030533b3020ca39898751d4200feed776861dcd1ceNate Begeman 7040533b3020ca39898751d4200feed776861dcd1ceNate Begeman Init = SVOp; 7050533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 7060533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 7070533b3020ca39898751d4200feed776861dcd1ceNate Begeman 7080533b3020ca39898751d4200feed776861dcd1ceNate Begeman // Extend init to result vector length, and then shuffle its contribution 7090533b3020ca39898751d4200feed776861dcd1ceNate Begeman // to the vector initializer into V. 7100533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (Args.empty()) { 7110533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = 0; j != InitElts; ++j) 7120533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(llvm::ConstantInt::get(I32Ty, j)); 7130533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = InitElts; j != ResElts; ++j) 7140533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(llvm::UndefValue::get(I32Ty)); 7150533b3020ca39898751d4200feed776861dcd1ceNate Begeman llvm::Constant *Mask = llvm::ConstantVector::get(&Args[0], ResElts); 7160533b3020ca39898751d4200feed776861dcd1ceNate Begeman Init = Builder.CreateShuffleVector(Init, llvm::UndefValue::get(VVT), 717a99f08351b6df3bb0f2947e038747717a60fd93aNate Begeman Mask, "vext"); 7180533b3020ca39898751d4200feed776861dcd1ceNate Begeman 7190533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.clear(); 7200533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = 0; j != CurIdx; ++j) 7210533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(llvm::ConstantInt::get(I32Ty, j)); 7220533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = 0; j != InitElts; ++j) 723a99f08351b6df3bb0f2947e038747717a60fd93aNate Begeman Args.push_back(llvm::ConstantInt::get(I32Ty, j+Offset)); 7240533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (unsigned j = CurIdx + InitElts; j != ResElts; ++j) 7250533b3020ca39898751d4200feed776861dcd1ceNate Begeman Args.push_back(llvm::UndefValue::get(I32Ty)); 7260533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 7270533b3020ca39898751d4200feed776861dcd1ceNate Begeman 7280533b3020ca39898751d4200feed776861dcd1ceNate Begeman // If V is undef, make sure it ends up on the RHS of the shuffle to aid 7290533b3020ca39898751d4200feed776861dcd1ceNate Begeman // merging subsequent shuffles into this one. 7300533b3020ca39898751d4200feed776861dcd1ceNate Begeman if (CurIdx == 0) 7310533b3020ca39898751d4200feed776861dcd1ceNate Begeman std::swap(V, Init); 7320533b3020ca39898751d4200feed776861dcd1ceNate Begeman llvm::Constant *Mask = llvm::ConstantVector::get(&Args[0], ResElts); 7330533b3020ca39898751d4200feed776861dcd1ceNate Begeman V = Builder.CreateShuffleVector(V, Init, Mask, "vecinit"); 7340533b3020ca39898751d4200feed776861dcd1ceNate Begeman VIsUndefShuffle = isa<llvm::UndefValue>(Init); 7350533b3020ca39898751d4200feed776861dcd1ceNate Begeman CurIdx += InitElts; 7360533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 7370533b3020ca39898751d4200feed776861dcd1ceNate Begeman 7380533b3020ca39898751d4200feed776861dcd1ceNate Begeman // FIXME: evaluate codegen vs. shuffling against constant null vector. 7390533b3020ca39898751d4200feed776861dcd1ceNate Begeman // Emit remaining default initializers. 7400533b3020ca39898751d4200feed776861dcd1ceNate Begeman const llvm::Type *EltTy = VType->getElementType(); 7410533b3020ca39898751d4200feed776861dcd1ceNate Begeman 7420533b3020ca39898751d4200feed776861dcd1ceNate Begeman // Emit remaining default initializers 7430533b3020ca39898751d4200feed776861dcd1ceNate Begeman for (/* Do not initialize i*/; CurIdx < ResElts; ++CurIdx) { 7440533b3020ca39898751d4200feed776861dcd1ceNate Begeman Value *Idx = llvm::ConstantInt::get(I32Ty, CurIdx); 7450533b3020ca39898751d4200feed776861dcd1ceNate Begeman llvm::Value *Init = llvm::Constant::getNullValue(EltTy); 7460533b3020ca39898751d4200feed776861dcd1ceNate Begeman V = Builder.CreateInsertElement(V, Init, Idx, "vecinit"); 7470533b3020ca39898751d4200feed776861dcd1ceNate Begeman } 7480533b3020ca39898751d4200feed776861dcd1ceNate Begeman return V; 7490533b3020ca39898751d4200feed776861dcd1ceNate Begeman} 7500533b3020ca39898751d4200feed776861dcd1ceNate Begeman 751504bf55195ccbf84e016a0c7759669dee2975ba3Anders Carlsson// VisitCastExpr - Emit code for an explicit or implicit cast. Implicit casts 752504bf55195ccbf84e016a0c7759669dee2975ba3Anders Carlsson// have to handle a more broad range of conversions than explicit casts, as they 753504bf55195ccbf84e016a0c7759669dee2975ba3Anders Carlsson// handle things like function to ptr-to-function decay etc. 754592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders CarlssonValue *ScalarExprEmitter::EmitCastExpr(const CastExpr *CE) { 755592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson const Expr *E = CE->getSubExpr(); 756592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson QualType DestTy = CE->getType(); 757592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson CastExpr::CastKind Kind = CE->getCastKind(); 758592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson 759504bf55195ccbf84e016a0c7759669dee2975ba3Anders Carlsson if (!DestTy->isVoidType()) 760504bf55195ccbf84e016a0c7759669dee2975ba3Anders Carlsson TestAndClearIgnoreResultAssign(); 761db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 762504bf55195ccbf84e016a0c7759669dee2975ba3Anders Carlsson switch (Kind) { 763504bf55195ccbf84e016a0c7759669dee2975ba3Anders Carlsson default: 764ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman //return CGF.ErrorUnsupported(E, "type of cast"); 7657f9e646b7ed47bc8e9a60031ad0c2b55031e2077Anders Carlsson break; 766ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 7677f9e646b7ed47bc8e9a60031ad0c2b55031e2077Anders Carlsson case CastExpr::CK_Unknown: 768ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman //assert(0 && "Unknown cast kind!"); 769504bf55195ccbf84e016a0c7759669dee2975ba3Anders Carlsson break; 770ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 771cb3c308ef0e63b2902911b985517309c26f975dcAnders Carlsson case CastExpr::CK_BitCast: { 772cb3c308ef0e63b2902911b985517309c26f975dcAnders Carlsson Value *Src = Visit(const_cast<Expr*>(E)); 773cb3c308ef0e63b2902911b985517309c26f975dcAnders Carlsson return Builder.CreateBitCast(Src, ConvertType(DestTy)); 774cb3c308ef0e63b2902911b985517309c26f975dcAnders Carlsson } 775ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman case CastExpr::CK_NoOp: 776ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman return Visit(const_cast<Expr*>(E)); 777db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 778191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson case CastExpr::CK_DerivedToBase: { 779191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson const RecordType *DerivedClassTy = 780191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson E->getType()->getAs<PointerType>()->getPointeeType()->getAs<RecordType>(); 781191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson CXXRecordDecl *DerivedClassDecl = 782191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson cast<CXXRecordDecl>(DerivedClassTy->getDecl()); 783191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson 784191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson const RecordType *BaseClassTy = 785191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson DestTy->getAs<PointerType>()->getPointeeType()->getAs<RecordType>(); 786191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(BaseClassTy->getDecl()); 787191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson 788191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson Value *Src = Visit(const_cast<Expr*>(E)); 78932baf62b9a3aea3b63be6925b64aa182b0a2278eAnders Carlsson 790592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson bool NullCheckValue = true; 79132baf62b9a3aea3b63be6925b64aa182b0a2278eAnders Carlsson 792592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson if (isa<CXXThisExpr>(E)) { 793592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson // We always assume that 'this' is never null. 79432baf62b9a3aea3b63be6925b64aa182b0a2278eAnders Carlsson NullCheckValue = false; 795592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(CE)) { 796592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson // And that lvalue casts are never null. 797592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson if (ICE->isLvalueCast()) 798592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson NullCheckValue = false; 799592a2bbc1945358ab8ebf0d74c57f0b23c4434c0Anders Carlsson } 800191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson return CGF.GetAddressCXXOfBaseClass(Src, DerivedClassDecl, BaseClassDecl, 80132baf62b9a3aea3b63be6925b64aa182b0a2278eAnders Carlsson NullCheckValue); 802191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson } 803ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman case CastExpr::CK_ToUnion: { 804ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman assert(0 && "Should be unreachable!"); 805ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman break; 806ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman } 807ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman case CastExpr::CK_ArrayToPointerDecay: { 808ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman assert(E->getType()->isArrayType() && 809ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman "Array to pointer decay must have array source type!"); 810ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 811ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman Value *V = EmitLValue(E).getAddress(); // Bitfields can't be arrays. 812ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 813ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman // Note that VLA pointers are always decayed, so we don't need to do 814ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman // anything here. 815ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman if (!E->getType()->isVariableArrayType()) { 816ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman assert(isa<llvm::PointerType>(V->getType()) && "Expected pointer"); 817ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman assert(isa<llvm::ArrayType>(cast<llvm::PointerType>(V->getType()) 818ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman ->getElementType()) && 819ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman "Expected pointer to array"); 820ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman V = Builder.CreateStructGEP(V, 0, "arraydecay"); 821ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman } 822ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 823ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman return V; 824ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman } 825ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman case CastExpr::CK_FunctionToPointerDecay: 826ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman return EmitLValue(E).getAddress(); 827ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 828ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman case CastExpr::CK_NullToMemberPointer: 829ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman return CGF.CGM.EmitNullConstant(DestTy); 830191dfe909d6cc18e9134ac23ac4daaedeceb862fAnders Carlsson 8317f9e646b7ed47bc8e9a60031ad0c2b55031e2077Anders Carlsson case CastExpr::CK_IntegralToPointer: { 8327f9e646b7ed47bc8e9a60031ad0c2b55031e2077Anders Carlsson Value *Src = Visit(const_cast<Expr*>(E)); 83382debc7d282e723e58d183bfa89ddc2500a8daafAnders Carlsson 83482debc7d282e723e58d183bfa89ddc2500a8daafAnders Carlsson // First, convert to the correct width so that we control the kind of 83582debc7d282e723e58d183bfa89ddc2500a8daafAnders Carlsson // extension. 83682debc7d282e723e58d183bfa89ddc2500a8daafAnders Carlsson const llvm::Type *MiddleTy = 83782debc7d282e723e58d183bfa89ddc2500a8daafAnders Carlsson llvm::IntegerType::get(VMContext, CGF.LLVMPointerWidth); 83882debc7d282e723e58d183bfa89ddc2500a8daafAnders Carlsson bool InputSigned = E->getType()->isSignedIntegerType(); 83982debc7d282e723e58d183bfa89ddc2500a8daafAnders Carlsson llvm::Value* IntResult = 84082debc7d282e723e58d183bfa89ddc2500a8daafAnders Carlsson Builder.CreateIntCast(Src, MiddleTy, InputSigned, "conv"); 84182debc7d282e723e58d183bfa89ddc2500a8daafAnders Carlsson 84282debc7d282e723e58d183bfa89ddc2500a8daafAnders Carlsson return Builder.CreateIntToPtr(IntResult, ConvertType(DestTy)); 8437f9e646b7ed47bc8e9a60031ad0c2b55031e2077Anders Carlsson } 8447f9e646b7ed47bc8e9a60031ad0c2b55031e2077Anders Carlsson 8457f9e646b7ed47bc8e9a60031ad0c2b55031e2077Anders Carlsson case CastExpr::CK_PointerToIntegral: { 8467f9e646b7ed47bc8e9a60031ad0c2b55031e2077Anders Carlsson Value *Src = Visit(const_cast<Expr*>(E)); 8477f9e646b7ed47bc8e9a60031ad0c2b55031e2077Anders Carlsson return Builder.CreatePtrToInt(Src, ConvertType(DestTy)); 8487f9e646b7ed47bc8e9a60031ad0c2b55031e2077Anders Carlsson } 849c849c052d6b4b70f2651c1969531861a5f230053Mike Stump 850ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman case CastExpr::CK_ToVoid: { 851ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman CGF.EmitAnyExpr(E, 0, false, true); 852ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman return 0; 853ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman } 854ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 855c849c052d6b4b70f2651c1969531861a5f230053Mike Stump case CastExpr::CK_Dynamic: { 856c849c052d6b4b70f2651c1969531861a5f230053Mike Stump Value *V = Visit(const_cast<Expr*>(E)); 857c849c052d6b4b70f2651c1969531861a5f230053Mike Stump const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(CE); 858c849c052d6b4b70f2651c1969531861a5f230053Mike Stump return CGF.EmitDynamicCast(V, DCE); 859c849c052d6b4b70f2651c1969531861a5f230053Mike Stump } 860ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 861ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman case CastExpr::CK_VectorSplat: { 862ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman const llvm::Type *DstTy = ConvertType(DestTy); 863ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman Value *Elt = Visit(const_cast<Expr*>(E)); 864ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 865ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman // Insert the element in element zero of an undef vector 866ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman llvm::Value *UnV = llvm::UndefValue::get(DstTy); 867ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman llvm::Value *Idx = 868ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 0); 869ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman UnV = Builder.CreateInsertElement(UnV, Elt, Idx, "tmp"); 870ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 871ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman // Splat the element across to all elements 872ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman llvm::SmallVector<llvm::Constant*, 16> Args; 873ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman unsigned NumElements = cast<llvm::VectorType>(DstTy)->getNumElements(); 874ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman for (unsigned i = 0; i < NumElements; i++) 875ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman Args.push_back(llvm::ConstantInt::get( 876ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman llvm::Type::getInt32Ty(VMContext), 0)); 877ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 878ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman llvm::Constant *Mask = llvm::ConstantVector::get(&Args[0], NumElements); 879ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman llvm::Value *Yay = Builder.CreateShuffleVector(UnV, UnV, Mask, "splat"); 880ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman return Yay; 881ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman } 882ad35a83102683b00a7e28707eee7f2d8c994b742Eli Friedman 883e9776247577715ad3a19461769a3488a445a8cbdAnders Carlsson } 884db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 88558a2e944faa16f1f61439acd2e71b19f50189511Chris Lattner // Handle cases where the source is an non-complex type. 886db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 88719a1d7c646729eb858b15583e647262a22de3637Chris Lattner if (!CGF.hasAggregateLLVMType(E->getType())) { 8883707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner Value *Src = Visit(const_cast<Expr*>(E)); 8893707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 8903707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // Use EmitScalarConversion to perform the conversion. 8913707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner return EmitScalarConversion(Src, E->getType(), DestTy); 8923707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner } 893db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 8949b2dc287177394a8f73833e2ad4f7ca8cd6f22bbChris Lattner if (E->getType()->isAnyComplexType()) { 89519a1d7c646729eb858b15583e647262a22de3637Chris Lattner // Handle cases where the source is a complex type. 8967f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool IgnoreImag = true; 8977f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool IgnoreImagAssign = true; 8987f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool IgnoreReal = IgnoreResultAssign; 8997f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool IgnoreRealAssign = IgnoreResultAssign; 9007f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (DestTy->isBooleanType()) 9017f79f9be5916c51c35da4f126b7c12596a101607Mike Stump IgnoreImagAssign = IgnoreImag = false; 9027f79f9be5916c51c35da4f126b7c12596a101607Mike Stump else if (DestTy->isVoidType()) { 9037f79f9be5916c51c35da4f126b7c12596a101607Mike Stump IgnoreReal = IgnoreImag = false; 9047f79f9be5916c51c35da4f126b7c12596a101607Mike Stump IgnoreRealAssign = IgnoreImagAssign = true; 9057f79f9be5916c51c35da4f126b7c12596a101607Mike Stump } 9067f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CodeGenFunction::ComplexPairTy V 9077f79f9be5916c51c35da4f126b7c12596a101607Mike Stump = CGF.EmitComplexExpr(E, IgnoreReal, IgnoreImag, IgnoreRealAssign, 9087f79f9be5916c51c35da4f126b7c12596a101607Mike Stump IgnoreImagAssign); 9097f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return EmitComplexToScalarConversion(V, E->getType(), DestTy); 91019a1d7c646729eb858b15583e647262a22de3637Chris Lattner } 91110b00cfe6422906b223724048b9b2123968d3baaChris Lattner 91219a1d7c646729eb858b15583e647262a22de3637Chris Lattner // Okay, this is a cast from an aggregate. It must be a cast to void. Just 91319a1d7c646729eb858b15583e647262a22de3637Chris Lattner // evaluate the result and return. 9147f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitAggExpr(E, 0, false, true); 91519a1d7c646729eb858b15583e647262a22de3637Chris Lattner return 0; 9167f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 9177f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 9183379320c10001d7e1ee5d7e7142c417f797cfe82Chris LattnerValue *ScalarExprEmitter::VisitStmtExpr(const StmtExpr *E) { 91991d723da7b68be5245c3ac58aa2a36d04658cfb8Chris Lattner return CGF.EmitCompoundStmt(*E->getSubStmt(), 92091d723da7b68be5245c3ac58aa2a36d04658cfb8Chris Lattner !E->getType()->isVoidType()).getScalarVal(); 9213379320c10001d7e1ee5d7e7142c417f797cfe82Chris Lattner} 9223379320c10001d7e1ee5d7e7142c417f797cfe82Chris Lattner 923a99038c0757a836c6faeeddaa5dfd249b32f6e9eMike StumpValue *ScalarExprEmitter::VisitBlockDeclRefExpr(const BlockDeclRefExpr *E) { 924f7bcc7e6c803a2b2f7b7f7fdfb2506dd25ec6de8Fariborz Jahanian llvm::Value *V = CGF.GetAddrOfBlockDecl(E); 925f7bcc7e6c803a2b2f7b7f7fdfb2506dd25ec6de8Fariborz Jahanian if (E->getType().isObjCGCWeak()) 926f7bcc7e6c803a2b2f7b7f7fdfb2506dd25ec6de8Fariborz Jahanian return CGF.CGM.getObjCRuntime().EmitObjCWeakRead(CGF, V); 927f7bcc7e6c803a2b2f7b7f7fdfb2506dd25ec6de8Fariborz Jahanian return Builder.CreateLoad(V, false, "tmp"); 9284e7a1f7682d94811bd41fca8aefccc38f686db23Mike Stump} 9293379320c10001d7e1ee5d7e7142c417f797cfe82Chris Lattner 9307f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 9317f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Unary Operators 9327f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 9337f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 9347f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitPrePostIncDec(const UnaryOperator *E, 935dfce2a51a78455c915722bc05f07c41e600220c9Chris Lattner bool isInc, bool isPre) { 9367f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LValue LV = EmitLValue(E->getSubExpr()); 937f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman QualType ValTy = E->getSubExpr()->getType(); 938f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman Value *InVal = CGF.EmitLoadOfLValue(LV, ValTy).getScalarVal(); 9390032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson 9400032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::LLVMContext &VMContext = CGF.getLLVMContext(); 941db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 9427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner int AmountVal = isInc ? 1 : -1; 943daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman 944daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman if (ValTy->isPointerType() && 9456217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek ValTy->getAs<PointerType>()->isVariableArrayType()) { 946daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // The amount of the addition/subtraction needs to account for the VLA size 947daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman CGF.ErrorUnsupported(E, "VLA pointer inc/dec"); 948daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman } 949daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman 9507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *NextVal; 951db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump if (const llvm::PointerType *PT = 9528cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner dyn_cast<llvm::PointerType>(InVal->getType())) { 953a1cf15f4680e5cf39e72e28c5ea854fcba792e84Owen Anderson llvm::Constant *Inc = 9540032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), AmountVal); 9558cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner if (!isa<llvm::FunctionType>(PT->getElementType())) { 95662a11a78c2616ce1fa3ef7b1a4bc3f42365cafb9Fariborz Jahanian QualType PTEE = ValTy->getPointeeType(); 957db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump if (const ObjCInterfaceType *OIT = 95862a11a78c2616ce1fa3ef7b1a4bc3f42365cafb9Fariborz Jahanian dyn_cast<ObjCInterfaceType>(PTEE)) { 95962a11a78c2616ce1fa3ef7b1a4bc3f42365cafb9Fariborz Jahanian // Handle interface types, which are not represented with a concrete type. 96062a11a78c2616ce1fa3ef7b1a4bc3f42365cafb9Fariborz Jahanian int size = CGF.getContext().getTypeSize(OIT) / 8; 96162a11a78c2616ce1fa3ef7b1a4bc3f42365cafb9Fariborz Jahanian if (!isInc) 96262a11a78c2616ce1fa3ef7b1a4bc3f42365cafb9Fariborz Jahanian size = -size; 9634a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson Inc = llvm::ConstantInt::get(Inc->getType(), size); 9643c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8Ty = llvm::Type::getInt8PtrTy(VMContext); 96562a11a78c2616ce1fa3ef7b1a4bc3f42365cafb9Fariborz Jahanian InVal = Builder.CreateBitCast(InVal, i8Ty); 96662a11a78c2616ce1fa3ef7b1a4bc3f42365cafb9Fariborz Jahanian NextVal = Builder.CreateGEP(InVal, Inc, "add.ptr"); 96762a11a78c2616ce1fa3ef7b1a4bc3f42365cafb9Fariborz Jahanian llvm::Value *lhs = LV.getAddress(); 96896e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson lhs = Builder.CreateBitCast(lhs, llvm::PointerType::getUnqual(i8Ty)); 9690953e767ff7817f97b3ab20896b229891eeff45bJohn McCall LV = LValue::MakeAddr(lhs, CGF.MakeQualifiers(ValTy)); 970b3589f44c5d295cd41de2c83f3475116835eeebdMike Stump } else 971664f8934e06cf10de98083b4526aef7bce191a3fDan Gohman NextVal = Builder.CreateInBoundsGEP(InVal, Inc, "ptrincdec"); 9728cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner } else { 9733c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8Ty = llvm::Type::getInt8PtrTy(VMContext); 9748cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner NextVal = Builder.CreateBitCast(InVal, i8Ty, "tmp"); 9758cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner NextVal = Builder.CreateGEP(NextVal, Inc, "ptrincdec"); 9768cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner NextVal = Builder.CreateBitCast(NextVal, InVal->getType()); 9778cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner } 9780032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson } else if (InVal->getType() == llvm::Type::getInt1Ty(VMContext) && isInc) { 979db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner // Bool++ is an interesting case, due to promotion rules, we get: 980db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner // Bool++ -> Bool = Bool+1 -> Bool = (int)Bool+1 -> 981db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner // Bool = ((int)Bool+1) != 0 982db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner // An interesting aspect of this is that increment is always true. 983db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner // Decrement does not have this property. 9843b144ba615c32f3cfa5309060ed5e09c89ac2871Owen Anderson NextVal = llvm::ConstantInt::getTrue(VMContext); 98587415d2d45224596a96ef02310701797d56b2c19Chris Lattner } else if (isa<llvm::IntegerType>(InVal->getType())) { 9864a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson NextVal = llvm::ConstantInt::get(InVal->getType(), AmountVal); 987bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman 988bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman // Signed integer overflow is undefined behavior. 989bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman if (ValTy->isSignedIntegerType()) 990bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman NextVal = Builder.CreateNSWAdd(InVal, NextVal, isInc ? "inc" : "dec"); 991bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman else 992bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman NextVal = Builder.CreateAdd(InVal, NextVal, isInc ? "inc" : "dec"); 993e936cc8890b94e83f530453c8c9167fb5de9b5faChris Lattner } else { 994e936cc8890b94e83f530453c8c9167fb5de9b5faChris Lattner // Add the inc/dec to the real part. 995ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer if (InVal->getType()->isFloatTy()) 996db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump NextVal = 997db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump llvm::ConstantFP::get(VMContext, 998bc0a2226c7fcd18b29b6846049e2cfcb872d3593Owen Anderson llvm::APFloat(static_cast<float>(AmountVal))); 999ffbb15e54a6dc120087003d1e42448b8705bd58aBenjamin Kramer else if (InVal->getType()->isDoubleTy()) 1000db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump NextVal = 1001bc0a2226c7fcd18b29b6846049e2cfcb872d3593Owen Anderson llvm::ConstantFP::get(VMContext, 1002bc0a2226c7fcd18b29b6846049e2cfcb872d3593Owen Anderson llvm::APFloat(static_cast<double>(AmountVal))); 100325ddea7f7835c4b1804e458a5c866cde0097430aChris Lattner else { 100425ddea7f7835c4b1804e458a5c866cde0097430aChris Lattner llvm::APFloat F(static_cast<float>(AmountVal)); 1005ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen bool ignored; 1006ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen F.convert(CGF.Target.getLongDoubleFormat(), llvm::APFloat::rmTowardZero, 1007ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen &ignored); 1008bc0a2226c7fcd18b29b6846049e2cfcb872d3593Owen Anderson NextVal = llvm::ConstantFP::get(VMContext, F); 1009ca2617c0e1f87c9da4d9aa3db4ea854ee2f6a1daChris Lattner } 101087415d2d45224596a96ef02310701797d56b2c19Chris Lattner NextVal = Builder.CreateFAdd(InVal, NextVal, isInc ? "inc" : "dec"); 1011e936cc8890b94e83f530453c8c9167fb5de9b5faChris Lattner } 1012db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 10137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Store the updated result through the lvalue. 1014f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman if (LV.isBitfield()) 1015f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman CGF.EmitStoreThroughBitfieldLValue(RValue::get(NextVal), LV, ValTy, 1016f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman &NextVal); 1017f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman else 1018f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman CGF.EmitStoreThroughLValue(RValue::get(NextVal), LV, ValTy); 10197f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 10207f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // If this is a postinc, return the value read from memory, otherwise use the 10217f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // updated value. 10227f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return isPre ? NextVal : InVal; 10237f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 10247f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 10257f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 10267f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitUnaryMinus(const UnaryOperator *E) { 10277f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 10287f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *Op = Visit(E->getSubExpr()); 102987415d2d45224596a96ef02310701797d56b2c19Chris Lattner if (Op->getType()->isFPOrFPVector()) 103087415d2d45224596a96ef02310701797d56b2c19Chris Lattner return Builder.CreateFNeg(Op, "neg"); 10317f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateNeg(Op, "neg"); 10327f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 10337f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 10347f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitUnaryNot(const UnaryOperator *E) { 10357f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 10367f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *Op = Visit(E->getSubExpr()); 10377f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateNot(Op, "neg"); 10387f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 10397f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 10407f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitUnaryLNot(const UnaryOperator *E) { 10417f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Compare operand to zero. 10427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *BoolVal = CGF.EvaluateExprAsBool(E->getSubExpr()); 1043db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 10447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Invert value. 10457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // TODO: Could dynamically modify easy computations here. For example, if 10467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // the operand is an icmp ne, turn into icmp eq. 10477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner BoolVal = Builder.CreateNot(BoolVal, "lnot"); 1048db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 10499f84d88a302ea38cf0695ce8cdace47178d2fff4Anders Carlsson // ZExt result to the expr type. 10509f84d88a302ea38cf0695ce8cdace47178d2fff4Anders Carlsson return Builder.CreateZExt(BoolVal, ConvertType(E->getType()), "lnot.ext"); 10517f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 10527f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 10530518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// VisitSizeOfAlignOfExpr - Return the size or alignment of the type of 10540518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// argument of the sizeof expression as an integer. 10550518999d3adcc289997bd974dce90cc97f5c1c44Sebastian RedlValue * 10560518999d3adcc289997bd974dce90cc97f5c1c44Sebastian RedlScalarExprEmitter::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) { 10570518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType TypeToSize = E->getTypeOfArgument(); 1058f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman if (E->isSizeOf()) { 1059db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump if (const VariableArrayType *VAT = 1060f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman CGF.getContext().getAsVariableArrayType(TypeToSize)) { 1061f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman if (E->isArgumentType()) { 1062f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman // sizeof(type) - make sure to emit the VLA size. 1063f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman CGF.EmitVLASize(TypeToSize); 10648f426fa9fca022201fc0944d6c1cb2cf9918db7dEli Friedman } else { 10658f426fa9fca022201fc0944d6c1cb2cf9918db7dEli Friedman // C99 6.5.3.4p2: If the argument is an expression of type 10668f426fa9fca022201fc0944d6c1cb2cf9918db7dEli Friedman // VLA, it is evaluated. 10678f426fa9fca022201fc0944d6c1cb2cf9918db7dEli Friedman CGF.EmitAnyExpr(E->getArgumentExpr()); 1068f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman } 1069db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 107096f214776c0f69069fee4d67557c8c7f416009a8Anders Carlsson return CGF.GetVLASize(VAT); 1071b50525ba0e996bc072cdb76152fcfe0bc64bb72aAnders Carlsson } 10725d46315ca3cbbfe0d0f5f65520b618fb05dd4446Anders Carlsson } 1073f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 1074db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // If this isn't sizeof(vla), the result must be constant; use the constant 1075db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // folding logic so we don't have to duplicate it here. 1076f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman Expr::EvalResult Result; 1077f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman E->Evaluate(Result, CGF.getContext()); 10784a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson return llvm::ConstantInt::get(VMContext, Result.Val.getInt()); 10797f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 10807f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 108146f93d021a1778442c1c4a53f0b94a68bfae3be5Chris LattnerValue *ScalarExprEmitter::VisitUnaryReal(const UnaryOperator *E) { 108246f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner Expr *Op = E->getSubExpr(); 10839b2dc287177394a8f73833e2ad4f7ca8cd6f22bbChris Lattner if (Op->getType()->isAnyComplexType()) 10847f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return CGF.EmitComplexExpr(Op, false, true, false, true).first; 108546f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner return Visit(Op); 108646f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner} 108746f93d021a1778442c1c4a53f0b94a68bfae3be5Chris LattnerValue *ScalarExprEmitter::VisitUnaryImag(const UnaryOperator *E) { 108846f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner Expr *Op = E->getSubExpr(); 10899b2dc287177394a8f73833e2ad4f7ca8cd6f22bbChris Lattner if (Op->getType()->isAnyComplexType()) 10907f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return CGF.EmitComplexExpr(Op, true, false, true, false).second; 1091db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 10927f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // __imag on a scalar returns zero. Emit the subexpr to ensure side 10937f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // effects are evaluated, but not the actual value. 10947f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (E->isLvalue(CGF.getContext()) == Expr::LV_Valid) 10957f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitLValue(Op); 10967f79f9be5916c51c35da4f126b7c12596a101607Mike Stump else 10977f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitScalarExpr(Op, true); 1098c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson return llvm::Constant::getNullValue(ConvertType(E->getType())); 109946f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner} 110046f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner 11011eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpValue *ScalarExprEmitter::VisitUnaryOffsetOf(const UnaryOperator *E) { 110235183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman Value* ResultAsPtr = EmitLValue(E->getSubExpr()).getAddress(); 1103769e411b72465a63454cdd416ff26ff313d43505Eli Friedman const llvm::Type* ResultType = ConvertType(E->getType()); 110435183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return Builder.CreatePtrToInt(ResultAsPtr, ResultType, "offsetof"); 11055a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson} 110646f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner 11077f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 11087f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Binary Operators 11097f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 11107f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 11117f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerBinOpInfo ScalarExprEmitter::EmitBinOps(const BinaryOperator *E) { 11127f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 11137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner BinOpInfo Result; 11147f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Result.LHS = Visit(E->getLHS()); 11157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Result.RHS = Visit(E->getRHS()); 11161f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner Result.Ty = E->getType(); 11177f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Result.E = E; 11187f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Result; 11197f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 11207f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 11213ccf774256382ef9aa95028eaad82f54a3d0b0adChris LattnerValue *ScalarExprEmitter::EmitCompoundAssign(const CompoundAssignOperator *E, 11221f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner Value *(ScalarExprEmitter::*Func)(const BinOpInfo &)) { 11237f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool Ignore = TestAndClearIgnoreResultAssign(); 11241f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner QualType LHSTy = E->getLHS()->getType(), RHSTy = E->getRHS()->getType(); 11251f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 11261f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner BinOpInfo OpInfo; 11271f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 1128ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman if (E->getComputationResultType()->isAnyComplexType()) { 1129db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // This needs to go through the complex expression emitter, but it's a tad 1130db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // complicated to do that... I'm leaving it out for now. (Note that we do 1131db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // actually need the imaginary part of the RHS for multiplication and 1132db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // division.) 1133ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman CGF.ErrorUnsupported(E, "complex compound assignment"); 113403e205031b08669f05c41eed5b896fc94c4a12bbOwen Anderson return llvm::UndefValue::get(CGF.ConvertType(E->getType())); 11351f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner } 11368c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar 1137cc0442fa28e5d1f403f820dcdee49911c3e622a9Mike Stump // Emit the RHS first. __block variables need to have the rhs evaluated 1138cc0442fa28e5d1f403f820dcdee49911c3e622a9Mike Stump // first, plus this should improve codegen a little. 1139cc0442fa28e5d1f403f820dcdee49911c3e622a9Mike Stump OpInfo.RHS = Visit(E->getRHS()); 1140cc0442fa28e5d1f403f820dcdee49911c3e622a9Mike Stump OpInfo.Ty = E->getComputationResultType(); 1141cc0442fa28e5d1f403f820dcdee49911c3e622a9Mike Stump OpInfo.E = E; 1142ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman // Load/convert the LHS. 1143ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman LValue LHSLV = EmitLValue(E->getLHS()); 1144ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman OpInfo.LHS = EmitLoadOfLValue(LHSLV, LHSTy); 1145ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman OpInfo.LHS = EmitScalarConversion(OpInfo.LHS, LHSTy, 1146ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman E->getComputationLHSType()); 1147db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 11481f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner // Expand the binary operator. 11491f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner Value *Result = (this->*Func)(OpInfo); 1150db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 11518c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // Convert the result back to the LHS type. 1152ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman Result = EmitScalarConversion(Result, E->getComputationResultType(), LHSTy); 1153ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 1154db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // Store the result value into the LHS lvalue. Bit-fields are handled 1155db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // specially because the result is altered by the store, i.e., [C99 6.5.16p1] 1156db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // 'An assignment expression has the value of the left operand after the 1157db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // assignment...'. 11587f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (LHSLV.isBitfield()) { 11597f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (!LHSLV.isVolatileQualified()) { 11607f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitStoreThroughBitfieldLValue(RValue::get(Result), LHSLV, LHSTy, 11617f79f9be5916c51c35da4f126b7c12596a101607Mike Stump &Result); 11627f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return Result; 11637f79f9be5916c51c35da4f126b7c12596a101607Mike Stump } else 11647f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitStoreThroughBitfieldLValue(RValue::get(Result), LHSLV, LHSTy); 11657f79f9be5916c51c35da4f126b7c12596a101607Mike Stump } else 1166ed3849b456d64d124bddc7ac044f3ce590bd9d69Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Result), LHSLV, LHSTy); 11677f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (Ignore) 11687f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return 0; 11697f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return EmitLoadOfLValue(LHSLV, E->getType()); 11701f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner} 11711f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 11721f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 11737f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitDiv(const BinOpInfo &Ops) { 1174b3ab8dc7d3b2e24259b990ac4ad75abfd07fa1f9Nate Begeman if (Ops.LHS->getType()->isFPOrFPVector()) 11757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateFDiv(Ops.LHS, Ops.RHS, "div"); 11761f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner else if (Ops.Ty->isUnsignedIntegerType()) 11777f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateUDiv(Ops.LHS, Ops.RHS, "div"); 11787f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner else 11797f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateSDiv(Ops.LHS, Ops.RHS, "div"); 11807f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 11817f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 11827f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitRem(const BinOpInfo &Ops) { 11837f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Rem in C can't be a floating point type: C99 6.5.5p2. 11841f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner if (Ops.Ty->isUnsignedIntegerType()) 11857f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateURem(Ops.LHS, Ops.RHS, "rem"); 11867f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner else 11877f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateSRem(Ops.LHS, Ops.RHS, "rem"); 11887f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 11897f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 11902add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike StumpValue *ScalarExprEmitter::EmitOverflowCheckedBinOp(const BinOpInfo &Ops) { 11912add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump unsigned IID; 11922add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump unsigned OpID = 0; 11935d8b2cf9fd704f6ca5e33525803a65421c0b440eMike Stump 1194035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump switch (Ops.E->getOpcode()) { 1195035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::Add: 1196035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::AddAssign: 1197035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump OpID = 1; 1198035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump IID = llvm::Intrinsic::sadd_with_overflow; 1199035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump break; 1200035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::Sub: 1201035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::SubAssign: 1202035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump OpID = 2; 1203035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump IID = llvm::Intrinsic::ssub_with_overflow; 1204035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump break; 1205035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::Mul: 1206035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::MulAssign: 1207035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump OpID = 3; 1208035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump IID = llvm::Intrinsic::smul_with_overflow; 1209035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump break; 1210035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump default: 1211035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump assert(false && "Unsupported operation for overflow detection"); 1212ab4eff620a9ce0ea62cdf29529a66c2c98d116f5Daniel Dunbar IID = 0; 1213035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump } 1214035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump OpID <<= 1; 1215035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump OpID |= 1; 1216035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump 12172add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump const llvm::Type *opTy = CGF.CGM.getTypes().ConvertType(Ops.Ty); 12182add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12192add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::Function *intrinsic = CGF.CGM.getIntrinsic(IID, &opTy, 1); 12202add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12212add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Value *resultAndOverflow = Builder.CreateCall2(intrinsic, Ops.LHS, Ops.RHS); 12222add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Value *result = Builder.CreateExtractValue(resultAndOverflow, 0); 12232add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Value *overflow = Builder.CreateExtractValue(resultAndOverflow, 1); 12242add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12252add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // Branch in case of overflow. 12262add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::BasicBlock *initialBB = Builder.GetInsertBlock(); 12272add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::BasicBlock *overflowBB = 12282add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump CGF.createBasicBlock("overflow", CGF.CurFn); 12292add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::BasicBlock *continueBB = 12302add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump CGF.createBasicBlock("overflow.continue", CGF.CurFn); 12312add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12322add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Builder.CreateCondBr(overflow, overflowBB, continueBB); 12332add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12342add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // Handle overflow 12352add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12362add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Builder.SetInsertPoint(overflowBB); 12372add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12382add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // Handler is: 1239db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // long long *__overflow_handler)(long long a, long long b, char op, 12402add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // char width) 12412add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump std::vector<const llvm::Type*> handerArgTypes; 12420032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson handerArgTypes.push_back(llvm::Type::getInt64Ty(VMContext)); 12430032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson handerArgTypes.push_back(llvm::Type::getInt64Ty(VMContext)); 12440032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson handerArgTypes.push_back(llvm::Type::getInt8Ty(VMContext)); 12450032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson handerArgTypes.push_back(llvm::Type::getInt8Ty(VMContext)); 12460032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::FunctionType *handlerTy = llvm::FunctionType::get( 12470032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Type::getInt64Ty(VMContext), handerArgTypes, false); 12482add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::Value *handlerFunction = 12492add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump CGF.CGM.getModule().getOrInsertGlobal("__overflow_handler", 125096e0fc726c6fe7538522c60743705d5e696b40afOwen Anderson llvm::PointerType::getUnqual(handlerTy)); 12512add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump handlerFunction = Builder.CreateLoad(handlerFunction); 12522add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12532add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::Value *handlerResult = Builder.CreateCall4(handlerFunction, 12540032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson Builder.CreateSExt(Ops.LHS, llvm::Type::getInt64Ty(VMContext)), 12550032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson Builder.CreateSExt(Ops.RHS, llvm::Type::getInt64Ty(VMContext)), 12560032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt8Ty(VMContext), OpID), 1257db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump llvm::ConstantInt::get(llvm::Type::getInt8Ty(VMContext), 12582add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump cast<llvm::IntegerType>(opTy)->getBitWidth())); 12592add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12602add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump handlerResult = Builder.CreateTrunc(handlerResult, opTy); 12612add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12622add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Builder.CreateBr(continueBB); 1263db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 12642add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // Set up the continuation 12652add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Builder.SetInsertPoint(continueBB); 12662add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // Get the correct result 12672add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::PHINode *phi = Builder.CreatePHI(opTy); 12682add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump phi->reserveOperandSpace(2); 12692add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump phi->addIncoming(result, initialBB); 12702add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump phi->addIncoming(handlerResult, overflowBB); 12712add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 12722add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump return phi; 12732add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump} 12747f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 12757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitAdd(const BinOpInfo &Ops) { 127658f9f2c884af6b72d036b746a016d8031d31cb7aSteve Naroff if (!Ops.Ty->isAnyPointerType()) { 127787415d2d45224596a96ef02310701797d56b2c19Chris Lattner if (CGF.getContext().getLangOptions().OverflowChecking && 127887415d2d45224596a96ef02310701797d56b2c19Chris Lattner Ops.Ty->isSignedIntegerType()) 12792add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump return EmitOverflowCheckedBinOp(Ops); 1280db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 128187415d2d45224596a96ef02310701797d56b2c19Chris Lattner if (Ops.LHS->getType()->isFPOrFPVector()) 128287415d2d45224596a96ef02310701797d56b2c19Chris Lattner return Builder.CreateFAdd(Ops.LHS, Ops.RHS, "add"); 1283bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman 1284bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman // Signed integer overflow is undefined behavior. 1285bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman if (Ops.Ty->isSignedIntegerType()) 1286bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman return Builder.CreateNSWAdd(Ops.LHS, Ops.RHS, "add"); 1287bf933a0cb628670490c15367b3f5ccb3193354a7Dan Gohman 12887f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateAdd(Ops.LHS, Ops.RHS, "add"); 12892add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump } 1290daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman 129114108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff if (Ops.Ty->isPointerType() && 12926217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek Ops.Ty->getAs<PointerType>()->isVariableArrayType()) { 1293daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // The amount of the addition needs to account for the VLA size 1294daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman CGF.ErrorUnsupported(Ops.E, "VLA pointer addition"); 1295daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman } 12968f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Value *Ptr, *Idx; 12978f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Expr *IdxExp; 12986217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const PointerType *PT = Ops.E->getLHS()->getType()->getAs<PointerType>(); 1299db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump const ObjCObjectPointerType *OPT = 1300183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall Ops.E->getLHS()->getType()->getAs<ObjCObjectPointerType>(); 130114108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff if (PT || OPT) { 13028f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Ptr = Ops.LHS; 13038f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Idx = Ops.RHS; 13048f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner IdxExp = Ops.E->getRHS(); 130514108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff } else { // int + pointer 13066217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek PT = Ops.E->getRHS()->getType()->getAs<PointerType>(); 1307183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall OPT = Ops.E->getRHS()->getType()->getAs<ObjCObjectPointerType>(); 130814108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff assert((PT || OPT) && "Invalid add expr"); 13098f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Ptr = Ops.RHS; 13108f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Idx = Ops.LHS; 13118f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner IdxExp = Ops.E->getLHS(); 13128f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner } 13138f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner 13148f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner unsigned Width = cast<llvm::IntegerType>(Idx->getType())->getBitWidth(); 13157cabee5b18212bd3106aea8415b044b2b3b43518Sanjiv Gupta if (Width < CGF.LLVMPointerWidth) { 13168f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner // Zero or sign extend the pointer value based on whether the index is 13178f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner // signed or not. 13180032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IdxType = 13190032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::IntegerType::get(VMContext, CGF.LLVMPointerWidth); 13209619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (IdxExp->getType()->isSignedIntegerType()) 13218f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Idx = Builder.CreateSExt(Idx, IdxType, "idx.ext"); 13228f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner else 13238f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Idx = Builder.CreateZExt(Idx, IdxType, "idx.ext"); 13248f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner } 132514108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff const QualType ElementType = PT ? PT->getPointeeType() : OPT->getPointeeType(); 1326db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // Handle interface types, which are not represented with a concrete type. 13272a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar if (const ObjCInterfaceType *OIT = dyn_cast<ObjCInterfaceType>(ElementType)) { 1328db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump llvm::Value *InterfaceSize = 13294a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::ConstantInt::get(Idx->getType(), 13302a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar CGF.getContext().getTypeSize(OIT) / 8); 13312a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Idx = Builder.CreateMul(Idx, InterfaceSize); 13323c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8Ty = llvm::Type::getInt8PtrTy(VMContext); 13332a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Value *Casted = Builder.CreateBitCast(Ptr, i8Ty); 13342a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Value *Res = Builder.CreateGEP(Casted, Idx, "add.ptr"); 13352a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar return Builder.CreateBitCast(Res, Ptr->getType()); 1336db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump } 13372a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar 1338db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // Explicitly handle GNU void* and function pointer arithmetic extensions. The 1339db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // GNU void* casts amount to no-ops since our void* type is i8*, but this is 1340db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // future proof. 1341b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar if (ElementType->isVoidType() || ElementType->isFunctionType()) { 13423c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8Ty = llvm::Type::getInt8PtrTy(VMContext); 1343b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar Value *Casted = Builder.CreateBitCast(Ptr, i8Ty); 13442a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Value *Res = Builder.CreateGEP(Casted, Idx, "add.ptr"); 1345b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar return Builder.CreateBitCast(Res, Ptr->getType()); 1346db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump } 1347db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1348664f8934e06cf10de98083b4526aef7bce191a3fDan Gohman return Builder.CreateInBoundsGEP(Ptr, Idx, "add.ptr"); 13497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 13507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 13517f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitSub(const BinOpInfo &Ops) { 13522add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump if (!isa<llvm::PointerType>(Ops.LHS->getType())) { 1353035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump if (CGF.getContext().getLangOptions().OverflowChecking 1354035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump && Ops.Ty->isSignedIntegerType()) 13552add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump return EmitOverflowCheckedBinOp(Ops); 135687415d2d45224596a96ef02310701797d56b2c19Chris Lattner 135787415d2d45224596a96ef02310701797d56b2c19Chris Lattner if (Ops.LHS->getType()->isFPOrFPVector()) 135887415d2d45224596a96ef02310701797d56b2c19Chris Lattner return Builder.CreateFSub(Ops.LHS, Ops.RHS, "sub"); 13597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateSub(Ops.LHS, Ops.RHS, "sub"); 13602add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump } 13611f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 136214108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff if (Ops.E->getLHS()->getType()->isPointerType() && 13636217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek Ops.E->getLHS()->getType()->getAs<PointerType>()->isVariableArrayType()) { 1364daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // The amount of the addition needs to account for the VLA size for 1365daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // ptr-int 1366daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // The amount of the division needs to account for the VLA size for 1367daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // ptr-ptr. 1368daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman CGF.ErrorUnsupported(Ops.E, "VLA pointer subtraction"); 1369daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman } 1370daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman 1371b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar const QualType LHSType = Ops.E->getLHS()->getType(); 137214108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff const QualType LHSElementType = LHSType->getPointeeType(); 13738c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar if (!isa<llvm::PointerType>(Ops.RHS->getType())) { 13748c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // pointer - int 13758c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Value *Idx = Ops.RHS; 13768c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar unsigned Width = cast<llvm::IntegerType>(Idx->getType())->getBitWidth(); 13777cabee5b18212bd3106aea8415b044b2b3b43518Sanjiv Gupta if (Width < CGF.LLVMPointerWidth) { 13788c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // Zero or sign extend the pointer value based on whether the index is 13798c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // signed or not. 13800032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IdxType = 13810032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::IntegerType::get(VMContext, CGF.LLVMPointerWidth); 13828c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar if (Ops.E->getRHS()->getType()->isSignedIntegerType()) 13838c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Idx = Builder.CreateSExt(Idx, IdxType, "idx.ext"); 13848c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar else 13858c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Idx = Builder.CreateZExt(Idx, IdxType, "idx.ext"); 13868c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar } 13878c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Idx = Builder.CreateNeg(Idx, "sub.ptr.neg"); 1388b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar 1389db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // Handle interface types, which are not represented with a concrete type. 1390db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump if (const ObjCInterfaceType *OIT = 13912a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar dyn_cast<ObjCInterfaceType>(LHSElementType)) { 1392db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump llvm::Value *InterfaceSize = 13934a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::ConstantInt::get(Idx->getType(), 13942a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar CGF.getContext().getTypeSize(OIT) / 8); 13952a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Idx = Builder.CreateMul(Idx, InterfaceSize); 13963c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8Ty = llvm::Type::getInt8PtrTy(VMContext); 13972a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Value *LHSCasted = Builder.CreateBitCast(Ops.LHS, i8Ty); 13982a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Value *Res = Builder.CreateGEP(LHSCasted, Idx, "add.ptr"); 13992a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar return Builder.CreateBitCast(Res, Ops.LHS->getType()); 1400db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump } 14012a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar 1402b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar // Explicitly handle GNU void* and function pointer arithmetic 1403db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // extensions. The GNU void* casts amount to no-ops since our void* type is 1404db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // i8*, but this is future proof. 1405b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar if (LHSElementType->isVoidType() || LHSElementType->isFunctionType()) { 14063c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *i8Ty = llvm::Type::getInt8PtrTy(VMContext); 1407b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar Value *LHSCasted = Builder.CreateBitCast(Ops.LHS, i8Ty); 1408b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar Value *Res = Builder.CreateGEP(LHSCasted, Idx, "sub.ptr"); 1409b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar return Builder.CreateBitCast(Res, Ops.LHS->getType()); 1410db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump } 1411db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1412664f8934e06cf10de98083b4526aef7bce191a3fDan Gohman return Builder.CreateInBoundsGEP(Ops.LHS, Idx, "sub.ptr"); 1413820b03398fdcc8f1f6c60ace55b708e311fa8ce4Daniel Dunbar } else { 14148c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // pointer - pointer 14158c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Value *LHS = Ops.LHS; 14168c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Value *RHS = Ops.RHS; 1417db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 14188c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar uint64_t ElementSize; 1419820b03398fdcc8f1f6c60ace55b708e311fa8ce4Daniel Dunbar 1420e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner // Handle GCC extension for pointer arithmetic on void* and function pointer 1421e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner // types. 1422e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner if (LHSElementType->isVoidType() || LHSElementType->isFunctionType()) { 14238c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar ElementSize = 1; 14248c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar } else { 14258c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar ElementSize = CGF.getContext().getTypeSize(LHSElementType) / 8; 14268c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar } 1427db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 14288c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar const llvm::Type *ResultType = ConvertType(Ops.Ty); 14298c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar LHS = Builder.CreatePtrToInt(LHS, ResultType, "sub.ptr.lhs.cast"); 14308c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar RHS = Builder.CreatePtrToInt(RHS, ResultType, "sub.ptr.rhs.cast"); 14318c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Value *BytesBetween = Builder.CreateSub(LHS, RHS, "sub.ptr.sub"); 1432db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1433e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner // Optimize out the shift for element size of 1. 1434e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner if (ElementSize == 1) 1435e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner return BytesBetween; 1436df1109434abd465a4db2e6f69ec2688866660367Dan Gohman 1437df1109434abd465a4db2e6f69ec2688866660367Dan Gohman // Otherwise, do a full sdiv. This uses the "exact" form of sdiv, since 1438db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // pointer difference in C is only defined in the case where both operands 1439db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // are pointing to elements of an array. 14404a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson Value *BytesPerElt = llvm::ConstantInt::get(ResultType, ElementSize); 1441df1109434abd465a4db2e6f69ec2688866660367Dan Gohman return Builder.CreateExactSDiv(BytesBetween, BytesPerElt, "sub.ptr.div"); 14427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 14437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 14447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 14457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitShl(const BinOpInfo &Ops) { 14467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // LLVM requires the LHS and RHS to be the same type: promote or truncate the 14477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // RHS to the same size as the LHS. 14487f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHS = Ops.RHS; 14497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (Ops.LHS->getType() != RHS->getType()) 14507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner RHS = Builder.CreateIntCast(RHS, Ops.LHS->getType(), false, "sh_prom"); 1451db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 14527f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateShl(Ops.LHS, RHS, "shl"); 14537f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 14547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 14557f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitShr(const BinOpInfo &Ops) { 14567f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // LLVM requires the LHS and RHS to be the same type: promote or truncate the 14577f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // RHS to the same size as the LHS. 14587f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHS = Ops.RHS; 14597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (Ops.LHS->getType() != RHS->getType()) 14607f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner RHS = Builder.CreateIntCast(RHS, Ops.LHS->getType(), false, "sh_prom"); 1461db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 14621f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner if (Ops.Ty->isUnsignedIntegerType()) 14637f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateLShr(Ops.LHS, RHS, "shr"); 14647f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateAShr(Ops.LHS, RHS, "shr"); 14657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 14667f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 14677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitCompare(const BinaryOperator *E,unsigned UICmpOpc, 14687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner unsigned SICmpOpc, unsigned FCmpOpc) { 14697f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 14704f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner Value *Result; 14717f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner QualType LHSTy = E->getLHS()->getType(); 14729c10fcfc3b9d2076efe701b60644a9987a93c503Chris Lattner if (!LHSTy->isAnyComplexType()) { 14737f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *LHS = Visit(E->getLHS()); 14747f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHS = Visit(E->getRHS()); 1475db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 14761360d4ad9045056d646c118344c7c5148aea4a52Eli Friedman if (LHS->getType()->isFPOrFPVector()) { 14777a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman Result = Builder.CreateFCmp((llvm::CmpInst::Predicate)FCmpOpc, 14787f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS, RHS, "cmp"); 1479ec2c12646aee07bf6bb1b4092d538d5860fd0661Eli Friedman } else if (LHSTy->isSignedIntegerType()) { 1480ec2c12646aee07bf6bb1b4092d538d5860fd0661Eli Friedman Result = Builder.CreateICmp((llvm::ICmpInst::Predicate)SICmpOpc, 14817f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS, RHS, "cmp"); 14827f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } else { 1483ec2c12646aee07bf6bb1b4092d538d5860fd0661Eli Friedman // Unsigned integers and pointers. 1484ec2c12646aee07bf6bb1b4092d538d5860fd0661Eli Friedman Result = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, 14857f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS, RHS, "cmp"); 14867f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 14879c10fcfc3b9d2076efe701b60644a9987a93c503Chris Lattner 14889c10fcfc3b9d2076efe701b60644a9987a93c503Chris Lattner // If this is a vector comparison, sign extend the result to the appropriate 14899c10fcfc3b9d2076efe701b60644a9987a93c503Chris Lattner // vector integer type and return it (don't convert to bool). 14909c10fcfc3b9d2076efe701b60644a9987a93c503Chris Lattner if (LHSTy->isVectorType()) 14919c10fcfc3b9d2076efe701b60644a9987a93c503Chris Lattner return Builder.CreateSExt(Result, ConvertType(E->getType()), "sext"); 1492db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 14937f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } else { 14947f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Complex Comparison: can only be an equality comparison. 14957f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CodeGenFunction::ComplexPairTy LHS = CGF.EmitComplexExpr(E->getLHS()); 14967f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CodeGenFunction::ComplexPairTy RHS = CGF.EmitComplexExpr(E->getRHS()); 1497db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1498183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall QualType CETy = LHSTy->getAs<ComplexType>()->getElementType(); 1499db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 15004f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner Value *ResultR, *ResultI; 15017f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (CETy->isRealFloatingType()) { 15027f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner ResultR = Builder.CreateFCmp((llvm::FCmpInst::Predicate)FCmpOpc, 15037f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS.first, RHS.first, "cmp.r"); 15047f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner ResultI = Builder.CreateFCmp((llvm::FCmpInst::Predicate)FCmpOpc, 15057f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS.second, RHS.second, "cmp.i"); 15067f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } else { 15077f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Complex comparisons can only be equality comparisons. As such, signed 15087f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // and unsigned opcodes are the same. 15097f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner ResultR = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, 15107f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS.first, RHS.first, "cmp.r"); 15117f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner ResultI = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, 15127f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS.second, RHS.second, "cmp.i"); 15137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1514db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 15157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (E->getOpcode() == BinaryOperator::EQ) { 15167f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Result = Builder.CreateAnd(ResultR, ResultI, "and.ri"); 15177f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } else { 15187f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner assert(E->getOpcode() == BinaryOperator::NE && 15197f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner "Complex comparison other than == or != ?"); 15207f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Result = Builder.CreateOr(ResultR, ResultI, "or.ri"); 15217f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 15227f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 152332f6209ea9a5a88ad3f8d7ad5e5b160b403d12daNuno Lopes 152432f6209ea9a5a88ad3f8d7ad5e5b160b403d12daNuno Lopes return EmitScalarConversion(Result, CGF.getContext().BoolTy, E->getType()); 15257f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 15267f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 15277f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitBinAssign(const BinaryOperator *E) { 15287f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool Ignore = TestAndClearIgnoreResultAssign(); 15297f79f9be5916c51c35da4f126b7c12596a101607Mike Stump 15307f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // __block variables need to have the rhs evaluated first, plus this should 15317f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // improve codegen just a little. 15327f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHS = Visit(E->getRHS()); 153399459b67daa0a49af7c5e5e93324f6ca815c0e6aMike Stump LValue LHS = EmitLValue(E->getLHS()); 1534db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1535ed3849b456d64d124bddc7ac044f3ce590bd9d69Daniel Dunbar // Store the value into the LHS. Bit-fields are handled specially 1536371d16f45aeec61c1d07687f763d92137e133642Daniel Dunbar // because the result is altered by the store, i.e., [C99 6.5.16p1] 1537371d16f45aeec61c1d07687f763d92137e133642Daniel Dunbar // 'An assignment expression has the value of the left operand after 1538daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // the assignment...'. 15397f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (LHS.isBitfield()) { 15407f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (!LHS.isVolatileQualified()) { 15417f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitStoreThroughBitfieldLValue(RValue::get(RHS), LHS, E->getType(), 15427f79f9be5916c51c35da4f126b7c12596a101607Mike Stump &RHS); 15437f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return RHS; 15447f79f9be5916c51c35da4f126b7c12596a101607Mike Stump } else 15457f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitStoreThroughBitfieldLValue(RValue::get(RHS), LHS, E->getType()); 15467f79f9be5916c51c35da4f126b7c12596a101607Mike Stump } else 1547ed3849b456d64d124bddc7ac044f3ce590bd9d69Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(RHS), LHS, E->getType()); 15487f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (Ignore) 15497f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return 0; 15507f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return EmitLoadOfLValue(LHS, E->getType()); 15517f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 15527f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 15537f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitBinLAnd(const BinaryOperator *E) { 15547804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner const llvm::Type *ResTy = ConvertType(E->getType()); 15557804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner 155620eb09d562b80420a3328be789547af354bf3e36Chris Lattner // If we have 0 && RHS, see if we can elide RHS, if so, just return 0. 155720eb09d562b80420a3328be789547af354bf3e36Chris Lattner // If we have 1 && X, just emit X without inserting the control flow. 155820eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (int Cond = CGF.ConstantFoldsToSimpleInteger(E->getLHS())) { 155920eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (Cond == 1) { // If we have 1 && X, just emit X. 15600946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); 15617804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner // ZExt result to int or bool. 15627804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner return Builder.CreateZExtOrBitCast(RHSCond, ResTy, "land.ext"); 15630946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner } 1564db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 15657804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner // 0 && RHS: If it is safe, just elide the RHS, and return 0/false. 156620eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (!CGF.ContainsLabel(E->getRHS())) 15677804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner return llvm::Constant::getNullValue(ResTy); 15680946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner } 1569db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 15709615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("land.end"); 15719615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("land.rhs"); 157220eb09d562b80420a3328be789547af354bf3e36Chris Lattner 1573f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Branch on the LHS first. If it is false, go to the failure (cont) block. 1574f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner CGF.EmitBranchOnBoolExpr(E->getLHS(), RHSBlock, ContBlock); 1575f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner 1576f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Any edges into the ContBlock are now from an (indeterminate number of) 1577f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // edges from this first condition. All of these values will be false. Start 1578f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // setting up the PHI node in the Cont Block for this. 15790032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::PHINode *PN = llvm::PHINode::Create(llvm::Type::getInt1Ty(VMContext), 15800032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson "", ContBlock); 1581f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner PN->reserveOperandSpace(2); // Normal case, two inputs. 1582f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner for (llvm::pred_iterator PI = pred_begin(ContBlock), PE = pred_end(ContBlock); 1583f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner PI != PE; ++PI) 15843b144ba615c32f3cfa5309060ed5e09c89ac2871Owen Anderson PN->addIncoming(llvm::ConstantInt::getFalse(VMContext), *PI); 1585db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1586a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.StartConditionalBranch(); 15877f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(RHSBlock); 15887f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); 1589a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.FinishConditionalBranch(); 1590db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 15917f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Reaquire the RHS block, as there may be subblocks inserted. 15927f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner RHSBlock = Builder.GetInsertBlock(); 1593f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner 1594f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Emit an unconditional branch from this block to ContBlock. Insert an entry 1595f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // into the phi node for the edge with the value of RHSCond. 15967f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(ContBlock); 15977f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner PN->addIncoming(RHSCond, RHSBlock); 1598db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 15997f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // ZExt result to int. 16007804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner return Builder.CreateZExtOrBitCast(PN, ResTy, "land.ext"); 16017f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 16027f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 16037f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitBinLOr(const BinaryOperator *E) { 16047804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner const llvm::Type *ResTy = ConvertType(E->getType()); 16057804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner 160620eb09d562b80420a3328be789547af354bf3e36Chris Lattner // If we have 1 || RHS, see if we can elide RHS, if so, just return 1. 160720eb09d562b80420a3328be789547af354bf3e36Chris Lattner // If we have 0 || X, just emit X without inserting the control flow. 160820eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (int Cond = CGF.ConstantFoldsToSimpleInteger(E->getLHS())) { 160920eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (Cond == -1) { // If we have 0 || X, just emit X. 16100946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); 16117804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner // ZExt result to int or bool. 16127804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner return Builder.CreateZExtOrBitCast(RHSCond, ResTy, "lor.ext"); 16130946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner } 1614db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 16157804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner // 1 || RHS: If it is safe, just elide the RHS, and return 1/true. 161620eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (!CGF.ContainsLabel(E->getRHS())) 16177804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner return llvm::ConstantInt::get(ResTy, 1); 16180946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner } 1619db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 16209615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("lor.end"); 16219615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("lor.rhs"); 1622db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1623f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Branch on the LHS first. If it is true, go to the success (cont) block. 1624f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner CGF.EmitBranchOnBoolExpr(E->getLHS(), ContBlock, RHSBlock); 1625f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner 1626f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Any edges into the ContBlock are now from an (indeterminate number of) 1627f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // edges from this first condition. All of these values will be true. Start 1628f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // setting up the PHI node in the Cont Block for this. 16290032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::PHINode *PN = llvm::PHINode::Create(llvm::Type::getInt1Ty(VMContext), 16300032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson "", ContBlock); 1631f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner PN->reserveOperandSpace(2); // Normal case, two inputs. 1632f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner for (llvm::pred_iterator PI = pred_begin(ContBlock), PE = pred_end(ContBlock); 1633f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner PI != PE; ++PI) 16343b144ba615c32f3cfa5309060ed5e09c89ac2871Owen Anderson PN->addIncoming(llvm::ConstantInt::getTrue(VMContext), *PI); 1635f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner 1636a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.StartConditionalBranch(); 163733da07db112f4877f6ab13e20db08b9bb86a0c2eAnders Carlsson 1638f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Emit the RHS condition as a bool value. 16397f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(RHSBlock); 16407f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); 1641db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1642a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.FinishConditionalBranch(); 1643db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 16447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Reaquire the RHS block, as there may be subblocks inserted. 16457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner RHSBlock = Builder.GetInsertBlock(); 1646db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1647f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Emit an unconditional branch from this block to ContBlock. Insert an entry 1648f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // into the phi node for the edge with the value of RHSCond. 1649f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner CGF.EmitBlock(ContBlock); 16507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner PN->addIncoming(RHSCond, RHSBlock); 1651db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 16527f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // ZExt result to int. 16537804bcba90bf5ea8ec6cd0f6cc9a64577f1a9259Chris Lattner return Builder.CreateZExtOrBitCast(PN, ResTy, "lor.ext"); 16547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 16557f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 16567f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitBinComma(const BinaryOperator *E) { 16577f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitStmt(E->getLHS()); 1658a448fb2da03ece39978784793eea68760e8205a1Daniel Dunbar CGF.EnsureInsertPoint(); 16597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Visit(E->getRHS()); 16607f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 16617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 16627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 16637f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Other Operators 16647f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 16657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 16669802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner/// isCheapEnoughToEvaluateUnconditionally - Return true if the specified 16679802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner/// expression is cheap enough and side-effect-free enough to evaluate 16689802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner/// unconditionally instead of conditionally. This is used to convert control 16699802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner/// flow into selects in some cases. 1670df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stumpstatic bool isCheapEnoughToEvaluateUnconditionally(const Expr *E, 1671df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump CodeGenFunction &CGF) { 16729802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner if (const ParenExpr *PE = dyn_cast<ParenExpr>(E)) 1673df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump return isCheapEnoughToEvaluateUnconditionally(PE->getSubExpr(), CGF); 1674db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 16759802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner // TODO: Allow anything we can constant fold to an integer or fp constant. 16769802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner if (isa<IntegerLiteral>(E) || isa<CharacterLiteral>(E) || 16779802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner isa<FloatingLiteral>(E)) 16789802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner return true; 1679db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 16809802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner // Non-volatile automatic variables too, to get "cond ? X : Y" where 16819802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner // X and Y are local variables. 16829802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 16839802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) 1684df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (VD->hasLocalStorage() && !(CGF.getContext() 1685df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump .getCanonicalType(VD->getType()) 1686df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump .isVolatileQualified())) 16879802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner return true; 1688db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 16899802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner return false; 16909802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner} 16919802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner 16929802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner 16937f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter:: 16947f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerVisitConditionalOperator(const ConditionalOperator *E) { 16957f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 169631a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // If the condition constant folds and can be elided, try to avoid emitting 169731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // the condition and the dead arm. 169831a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (int Cond = CGF.ConstantFoldsToSimpleInteger(E->getCond())){ 1699c657e92d7b44568fe39ae018a69b18cbcc4ea3b0Chris Lattner Expr *Live = E->getLHS(), *Dead = E->getRHS(); 170031a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (Cond == -1) 1701c657e92d7b44568fe39ae018a69b18cbcc4ea3b0Chris Lattner std::swap(Live, Dead); 1702db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 170331a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // If the dead side doesn't have labels we need, and if the Live side isn't 170431a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // the gnu missing ?: extension (which we could handle, but don't bother 170531a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // to), just emit the Live part. 170631a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if ((!Dead || !CGF.ContainsLabel(Dead)) && // No labels in dead part 170731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner Live) // Live part isn't missing. 170831a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner return Visit(Live); 1709c657e92d7b44568fe39ae018a69b18cbcc4ea3b0Chris Lattner } 1710db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1711db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 17129802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner // If this is a really simple expression (like x ? 4 : 5), emit this as a 17139802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner // select instead of as control flow. We can only do this if it is cheap and 1714531a550531c144a58438f187816abbf1879e1c4eChris Lattner // safe to evaluate the LHS and RHS unconditionally. 1715df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (E->getLHS() && isCheapEnoughToEvaluateUnconditionally(E->getLHS(), 1716df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump CGF) && 1717df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump isCheapEnoughToEvaluateUnconditionally(E->getRHS(), CGF)) { 17189802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner llvm::Value *CondV = CGF.EvaluateExprAsBool(E->getCond()); 17199802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner llvm::Value *LHS = Visit(E->getLHS()); 17209802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner llvm::Value *RHS = Visit(E->getRHS()); 17219802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner return Builder.CreateSelect(CondV, LHS, RHS, "cond"); 17229802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner } 1723db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1724db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1725be65abc8e41213ecb951f2f507fb2e13a151d30cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 1726be65abc8e41213ecb951f2f507fb2e13a151d30cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 17279615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 1728035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner Value *CondVal = 0; 1729035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner 1730db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // If we don't have the GNU missing condition extension, emit a branch on bool 1731db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump // the normal way. 173212d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner if (E->getLHS()) { 173312d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // Otherwise, just use EmitBranchOnBoolExpr to get small and simple code for 173412d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // the branch on bool. 173512d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock); 173612d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner } else { 173712d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // Otherwise, for the ?: extension, evaluate the conditional and then 173812d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // convert it to bool the hard way. We do this explicitly because we need 173912d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // the unconverted value for the missing middle value of the ?:. 1740035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner CondVal = CGF.EmitScalarExpr(E->getCond()); 1741db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 174212d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // In some cases, EmitScalarConversion will delete the "CondVal" expression 174312d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // if there are no extra uses (an optimization). Inhibit this by making an 174412d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // extra dead use, because we're going to add a use of CondVal later. We 174512d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // don't use the builder for this, because we don't want it to get optimized 174612d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // away. This leaves dead code, but the ?: extension isn't common. 174712d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner new llvm::BitCastInst(CondVal, CondVal->getType(), "dummy?:holder", 174812d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner Builder.GetInsertBlock()); 1749db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1750035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner Value *CondBoolVal = 1751035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner CGF.EmitScalarConversion(CondVal, E->getCond()->getType(), 1752035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner CGF.getContext().BoolTy); 1753035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner Builder.CreateCondBr(CondBoolVal, LHSBlock, RHSBlock); 1754035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner } 1755fb6fa30a9b06670deb14f862dddbc49a12552939Anders Carlsson 1756a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.StartConditionalBranch(); 17577f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(LHSBlock); 1758db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 17597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Handle the GNU extension for missing LHS. 1760a21ddb30e56026967d58e26c5212744e1831305bChris Lattner Value *LHS; 1761a21ddb30e56026967d58e26c5212744e1831305bChris Lattner if (E->getLHS()) 1762856226c37ff10955c7f3f07ce6fa9522da23a3a5Eli Friedman LHS = Visit(E->getLHS()); 1763a21ddb30e56026967d58e26c5212744e1831305bChris Lattner else // Perform promotions, to handle cases like "short ?: int" 1764a21ddb30e56026967d58e26c5212744e1831305bChris Lattner LHS = EmitScalarConversion(CondVal, E->getCond()->getType(), E->getType()); 1765db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1766a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.FinishConditionalBranch(); 17677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHSBlock = Builder.GetInsertBlock(); 1768d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 1769db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1770a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.StartConditionalBranch(); 17717f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(RHSBlock); 1772db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1773856226c37ff10955c7f3f07ce6fa9522da23a3a5Eli Friedman Value *RHS = Visit(E->getRHS()); 1774a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.FinishConditionalBranch(); 17757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner RHSBlock = Builder.GetInsertBlock(); 1776d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 1777db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 17787f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(ContBlock); 1779db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1780108f55d6fd9a1c0e753eb8e046cb1f1b81d77a76Nuno Lopes if (!LHS || !RHS) { 17812202bce80fc72d067cbe67dc1512f7b45351fd31Chris Lattner assert(E->getType()->isVoidType() && "Non-void value should have a value"); 17822202bce80fc72d067cbe67dc1512f7b45351fd31Chris Lattner return 0; 17832202bce80fc72d067cbe67dc1512f7b45351fd31Chris Lattner } 1784db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 17857f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Create a PHI node for the real part. 17867f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner llvm::PHINode *PN = Builder.CreatePHI(LHS->getType(), "cond"); 17877f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner PN->reserveOperandSpace(2); 17887f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner PN->addIncoming(LHS, LHSBlock); 17897f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner PN->addIncoming(RHS, RHSBlock); 17907f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return PN; 17917f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 17927f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 17937f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitChooseExpr(ChooseExpr *E) { 17947976932a1c256d447316ffac58e9821417725e34Eli Friedman return Visit(E->getChosenSubExpr(CGF.getContext())); 17957f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 17967f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 17972202bce80fc72d067cbe67dc1512f7b45351fd31Chris LattnerValue *ScalarExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 17984fd0aa5803357d8c72eeac2cae15e12649ea08feEli Friedman llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); 1799ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 1800ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 1801ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson // If EmitVAArg fails, we fall back to the LLVM instruction. 1802db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump if (!ArgPtr) 1803ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson return Builder.CreateVAArg(ArgValue, ConvertType(VE->getType())); 1804ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 18057f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // FIXME Volatility. 1806ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson return Builder.CreateLoad(ArgPtr); 18077c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson} 18087c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson 1809df6b68c9487aed2042c7fc23db10a79f89083a11Mike StumpValue *ScalarExprEmitter::VisitBlockExpr(const BlockExpr *BE) { 18100892099dbc640720400a1d9decd2733a09d733e5Mike Stump return CGF.BuildBlockLiteralTmp(BE); 1811df6b68c9487aed2042c7fc23db10a79f89083a11Mike Stump} 1812df6b68c9487aed2042c7fc23db10a79f89083a11Mike Stump 18137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 18147f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Entry Point into this File 18157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 18167f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1817db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump/// EmitScalarExpr - Emit the computation of the specified expression of scalar 1818db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump/// type, ignoring the result. 18197f79f9be5916c51c35da4f126b7c12596a101607Mike StumpValue *CodeGenFunction::EmitScalarExpr(const Expr *E, bool IgnoreResultAssign) { 18207f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner assert(E && !hasAggregateLLVMType(E->getType()) && 18217f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner "Invalid scalar expression to emit"); 1822db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 18237f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return ScalarExprEmitter(*this, IgnoreResultAssign) 18247f79f9be5916c51c35da4f126b7c12596a101607Mike Stump .Visit(const_cast<Expr*>(E)); 18257f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 18263707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 18273707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner/// EmitScalarConversion - Emit a conversion from the specified type to the 18283707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner/// specified destination type, both of which are LLVM scalar types. 18294f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris LattnerValue *CodeGenFunction::EmitScalarConversion(Value *Src, QualType SrcTy, 18304f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType DstTy) { 18313707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner assert(!hasAggregateLLVMType(SrcTy) && !hasAggregateLLVMType(DstTy) && 18323707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner "Invalid scalar expression to emit"); 18333707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner return ScalarExprEmitter(*this).EmitScalarConversion(Src, SrcTy, DstTy); 18343707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner} 18354f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner 1836db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump/// EmitComplexToScalarConversion - Emit a conversion from the specified complex 1837db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump/// type to the specified destination type, where the destination type is an 1838db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump/// LLVM scalar type. 18394f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris LattnerValue *CodeGenFunction::EmitComplexToScalarConversion(ComplexPairTy Src, 18404f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType SrcTy, 18414f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType DstTy) { 18429b2dc287177394a8f73833e2ad4f7ca8cd6f22bbChris Lattner assert(SrcTy->isAnyComplexType() && !hasAggregateLLVMType(DstTy) && 18434f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner "Invalid complex -> scalar conversion"); 18444f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner return ScalarExprEmitter(*this).EmitComplexToScalarConversion(Src, SrcTy, 18454f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner DstTy); 18464f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner} 1847cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson 1848cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders CarlssonValue *CodeGenFunction::EmitShuffleVector(Value* V1, Value *V2, ...) { 1849cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson assert(V1->getType() == V2->getType() && 1850cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson "Vector operands must be of the same type"); 1851db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump unsigned NumElements = 1852cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson cast<llvm::VectorType>(V1->getType())->getNumElements(); 1853db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1854cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson va_list va; 1855cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson va_start(va, V2); 1856db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1857cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson llvm::SmallVector<llvm::Constant*, 16> Args; 1858cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson for (unsigned i = 0; i < NumElements; i++) { 1859cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson int n = va_arg(va, int); 1860db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump assert(n >= 0 && n < (int)NumElements * 2 && 1861cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson "Vector shuffle index out of bounds!"); 18620032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson Args.push_back(llvm::ConstantInt::get( 18630032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Type::getInt32Ty(VMContext), n)); 1864cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson } 1865db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1866cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson const char *Name = va_arg(va, const char *); 1867cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson va_end(va); 1868db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 18694a28932dba03132dabbe70abdadcaae468dd7933Owen Anderson llvm::Constant *Mask = llvm::ConstantVector::get(&Args[0], NumElements); 1870db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1871cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson return Builder.CreateShuffleVector(V1, V2, Mask, Name); 1872cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson} 1873cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson 1874db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stumpllvm::Value *CodeGenFunction::EmitVector(llvm::Value * const *Vals, 1875345f7209692b116ca433a3196c1e3c998e0ffcdeChris Lattner unsigned NumVals, bool isSplat) { 18766086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlsson llvm::Value *Vec 187703e205031b08669f05c41eed5b896fc94c4a12bbOwen Anderson = llvm::UndefValue::get(llvm::VectorType::get(Vals[0]->getType(), NumVals)); 1878db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1879345f7209692b116ca433a3196c1e3c998e0ffcdeChris Lattner for (unsigned i = 0, e = NumVals; i != e; ++i) { 18804119d1aeca8016654d381ce079864058d1709571Nate Begeman llvm::Value *Val = isSplat ? Vals[0] : Vals[i]; 18810032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Value *Idx = llvm::ConstantInt::get( 18820032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::Type::getInt32Ty(VMContext), i); 18834119d1aeca8016654d381ce079864058d1709571Nate Begeman Vec = Builder.CreateInsertElement(Vec, Val, Idx, "tmp"); 18846086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlsson } 1885db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump 1886db52dcdae7d2e25565096d07ee74fa307061cc32Mike Stump return Vec; 18876086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlsson} 1888