CGExprScalar.cpp revision a00703dccbdc6cc4a293db38477dea7db5538c7e
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" 157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#include "CodeGenModule.h" 16de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/ASTContext.h" 1798c5ead87d720d8b68b6f236c3c3579a388fc882Daniel Dunbar#include "clang/AST/DeclObjC.h" 18769e411b72465a63454cdd416ff26ff313d43505Eli Friedman#include "clang/AST/RecordLayout.h" 19de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/StmtVisitor.h" 2025ddea7f7835c4b1804e458a5c866cde0097430aChris Lattner#include "clang/Basic/TargetInfo.h" 217f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#include "llvm/Constants.h" 227f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#include "llvm/Function.h" 2385f9bceab1542aafff012d4d28e998f4ba16e362Anders Carlsson#include "llvm/GlobalVariable.h" 247c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson#include "llvm/Intrinsics.h" 252add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump#include "llvm/Module.h" 267f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#include "llvm/Support/Compiler.h" 27f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner#include "llvm/Support/CFG.h" 284e7a1f7682d94811bd41fca8aefccc38f686db23Mike Stump#include "llvm/Target/TargetData.h" 29c89bf69c9289d2b2305f2c267daacc7312391898Chris Lattner#include <cstdarg> 306aad91a43e26118c824d976661077819265d9bc0Ted Kremenek 317f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerusing namespace clang; 327f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerusing namespace CodeGen; 337f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerusing llvm::Value; 347f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 357f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 367f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Scalar Expression Emitter 377f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 387f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 397f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerstruct BinOpInfo { 407f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *LHS; 417f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHS; 421f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner QualType Ty; // Computation Type. 437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner const BinaryOperator *E; 447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner}; 457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnernamespace { 477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerclass VISIBILITY_HIDDEN ScalarExprEmitter 487f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner : public StmtVisitor<ScalarExprEmitter, Value*> { 497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CodeGenFunction &CGF; 5045d196b8387dcefc4df26cda114fa34c6528e928Daniel Dunbar CGBuilderTy &Builder; 517f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool IgnoreResultAssign; 522b94fe35edf951a14ecd32b21f7ebcc2e3754c67Chris Lattner 537f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattnerpublic: 547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 557f79f9be5916c51c35da4f126b7c12596a101607Mike Stump ScalarExprEmitter(CodeGenFunction &cgf, bool ira=false) 567f79f9be5916c51c35da4f126b7c12596a101607Mike Stump : CGF(cgf), Builder(CGF.Builder), IgnoreResultAssign(ira) { 577f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 587f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner //===--------------------------------------------------------------------===// 607f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Utilities 617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner //===--------------------------------------------------------------------===// 627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 637f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool TestAndClearIgnoreResultAssign() { 647f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool I = IgnoreResultAssign; IgnoreResultAssign = false; 657f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return I; } 667f79f9be5916c51c35da4f126b7c12596a101607Mike Stump 677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner const llvm::Type *ConvertType(QualType T) { return CGF.ConvertType(T); } 687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LValue EmitLValue(const Expr *E) { return CGF.EmitLValue(E); } 697f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 707f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitLoadOfLValue(LValue LV, QualType T) { 719b65551d0b387a7597fb39356a4d8ef10046445eChris Lattner return CGF.EmitLoadOfLValue(LV, T).getScalarVal(); 727f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 737f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 747f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner /// EmitLoadOfLValue - Given an expression with complex type that represents a 757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner /// value l-value, this method emits the address of the l-value, then loads 767f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner /// and returns the result. 777f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitLoadOfLValue(const Expr *E) { 787f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitLoadOfLValue(EmitLValue(E), E->getType()); 797f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 807f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 819abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner /// EmitConversionToBool - Convert the specified expression value to a 823420d0de2c52fedf771d7ef20522f6080233e377Chris Lattner /// boolean (i1) truth value. This is equivalent to "Val != 0". 839abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner Value *EmitConversionToBool(Value *Src, QualType DstTy); 849abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner 853707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner /// EmitScalarConversion - Emit a conversion from the specified type to the 863707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner /// specified destination type, both of which are LLVM scalar types. 874f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner Value *EmitScalarConversion(Value *Src, QualType SrcTy, QualType DstTy); 884f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner 894f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner /// EmitComplexToScalarConversion - Emit a conversion from the specified 904f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner /// complex type to the specified destination type, where the destination 914f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner /// type is an LLVM scalar type. 924f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner Value *EmitComplexToScalarConversion(CodeGenFunction::ComplexPairTy Src, 934f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType SrcTy, QualType DstTy); 94df6b68c9487aed2042c7fc23db10a79f89083a11Mike Stump 957f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner //===--------------------------------------------------------------------===// 967f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Visitor Methods 977f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner //===--------------------------------------------------------------------===// 987f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 997f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitStmt(Stmt *S) { 1007a9d49fd2bfac00e905b361ba76d26ab5b6c3b09Ted Kremenek S->dump(CGF.getContext().getSourceManager()); 1017f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner assert(0 && "Stmt can't have complex result type!"); 1027f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return 0; 1037f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1047f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitExpr(Expr *S); 1057f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitParenExpr(ParenExpr *PE) { return Visit(PE->getSubExpr()); } 1067f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1077f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Leaves. 1087f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitIntegerLiteral(const IntegerLiteral *E) { 1097f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return llvm::ConstantInt::get(E->getValue()); 1107f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1117f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitFloatingLiteral(const FloatingLiteral *E) { 11259138ba7ce960888433546639deb45e2e03f8857Chris Lattner return llvm::ConstantFP::get(E->getValue()); 1137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1147f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitCharacterLiteral(const CharacterLiteral *E) { 1157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); 116e7579b57eb3eabfd3545b86320fb67466730e9fcNate Begeman } 117e7579b57eb3eabfd3545b86320fb67466730e9fcNate Begeman Value *VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 118e7579b57eb3eabfd3545b86320fb67466730e9fcNate Begeman return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue()); 1197f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1207267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis Value *VisitCXXZeroInitValueExpr(const CXXZeroInitValueExpr *E) { 1217267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis return llvm::Constant::getNullValue(ConvertType(E->getType())); 1227267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis } 1233f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson Value *VisitGNUNullExpr(const GNUNullExpr *E) { 1243f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson return llvm::Constant::getNullValue(ConvertType(E->getType())); 1253f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 1267f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitTypesCompatibleExpr(const TypesCompatibleExpr *E) { 1277f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return llvm::ConstantInt::get(ConvertType(E->getType()), 128ec0550fa3653d46560bf4484a2e988329c228e39Steve Naroff CGF.getContext().typesAreCompatible( 129ec0550fa3653d46560bf4484a2e988329c228e39Steve Naroff E->getArgType1(), E->getArgType2())); 1307f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1310518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Value *VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E); 1320ffb125996336fc7602b162c0a9e392f1a93060fDaniel Dunbar Value *VisitAddrLabelExpr(const AddrLabelExpr *E) { 13354d19091a809d30a5e6e352fda53377d69ebda66Daniel Dunbar llvm::Value *V = 13454d19091a809d30a5e6e352fda53377d69ebda66Daniel Dunbar llvm::ConstantInt::get(llvm::Type::Int32Ty, 13554d19091a809d30a5e6e352fda53377d69ebda66Daniel Dunbar CGF.GetIDForAddrOfLabel(E->getLabel())); 13654d19091a809d30a5e6e352fda53377d69ebda66Daniel Dunbar 13754d19091a809d30a5e6e352fda53377d69ebda66Daniel Dunbar return Builder.CreateIntToPtr(V, ConvertType(E->getType())); 1380ffb125996336fc7602b162c0a9e392f1a93060fDaniel Dunbar } 1397f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1407f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // l-values. 1417f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitDeclRefExpr(DeclRefExpr *E) { 1427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (const EnumConstantDecl *EC = dyn_cast<EnumConstantDecl>(E->getDecl())) 1437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return llvm::ConstantInt::get(EC->getInitVal()); 1447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitLoadOfLValue(E); 1457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 1469c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar Value *VisitObjCSelectorExpr(ObjCSelectorExpr *E) { 1479c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar return CGF.EmitObjCSelectorExpr(E); 1489c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar } 1499c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar Value *VisitObjCProtocolExpr(ObjCProtocolExpr *E) { 1509c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar return CGF.EmitObjCProtocolExpr(E); 1519c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar } 1529c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar Value *VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { 1539c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar return EmitLoadOfLValue(E); 1549c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar } 1550a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar Value *VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 15685c59edda02df48fae8dc85049743319bc6e7e89Daniel Dunbar return EmitLoadOfLValue(E); 1579c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar } 15843f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian Value *VisitObjCKVCRefExpr(ObjCKVCRefExpr *E) { 15943f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian return EmitLoadOfLValue(E); 16043f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian } 1619c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar Value *VisitObjCMessageExpr(ObjCMessageExpr *E) { 1629c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar return CGF.EmitObjCMessageExpr(E).getScalarVal(); 1630a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar } 1640a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar 1657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitArraySubscriptExpr(ArraySubscriptExpr *E); 166d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman Value *VisitShuffleVectorExpr(ShuffleVectorExpr *E); 1677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitMemberExpr(Expr *E) { return EmitLoadOfLValue(E); } 168213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman Value *VisitExtVectorElementExpr(Expr *E) { return EmitLoadOfLValue(E); } 169be20bb558cae5352898e6a913e29d24d20134841Chris Lattner Value *VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 170be20bb558cae5352898e6a913e29d24d20134841Chris Lattner return EmitLoadOfLValue(E); 171be20bb558cae5352898e6a913e29d24d20134841Chris Lattner } 1727f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitStringLiteral(Expr *E) { return EmitLValue(E).getAddress(); } 173eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner Value *VisitObjCEncodeExpr(const ObjCEncodeExpr *E) { 174eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner return EmitLValue(E).getAddress(); 175eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner } 176eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner 177d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner Value *VisitPredefinedExpr(Expr *E) { return EmitLValue(E).getAddress(); } 17835634f5ed67966c9f1fde38420e79cc6515cd673Devang Patel 17935634f5ed67966c9f1fde38420e79cc6515cd673Devang Patel Value *VisitInitListExpr(InitListExpr *E) { 1807f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool Ignore = TestAndClearIgnoreResultAssign(); 1817f79f9be5916c51c35da4f126b7c12596a101607Mike Stump (void)Ignore; 1827f79f9be5916c51c35da4f126b7c12596a101607Mike Stump assert (Ignore == false && "init list ignored"); 1837019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson unsigned NumInitElements = E->getNumInits(); 1847019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson 185a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor if (E->hadArrayRangeDesignator()) { 186a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor CGF.ErrorUnsupported(E, "GNU array range designator extension"); 187a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor } 188a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor 1897019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson const llvm::VectorType *VType = 190f6884ac7cfc4c5562c0678ad65b3460a38f56e23Anders Carlsson dyn_cast<llvm::VectorType>(ConvertType(E->getType())); 191f6884ac7cfc4c5562c0678ad65b3460a38f56e23Anders Carlsson 192f6884ac7cfc4c5562c0678ad65b3460a38f56e23Anders Carlsson // We have a scalar in braces. Just use the first element. 193f6884ac7cfc4c5562c0678ad65b3460a38f56e23Anders Carlsson if (!VType) 194f6884ac7cfc4c5562c0678ad65b3460a38f56e23Anders Carlsson return Visit(E->getInit(0)); 1957019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson 1967019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson unsigned NumVectorElements = VType->getNumElements(); 1977019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson const llvm::Type *ElementType = VType->getElementType(); 1987019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson 1997019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson // Emit individual vector element stores. 2007019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson llvm::Value *V = llvm::UndefValue::get(VType); 2017019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson 202222d2c8b7886e37ba22f0b25ac7a6552f7cc8492Anders Carlsson // Emit initializers 203222d2c8b7886e37ba22f0b25ac7a6552f7cc8492Anders Carlsson unsigned i; 204222d2c8b7886e37ba22f0b25ac7a6552f7cc8492Anders Carlsson for (i = 0; i < NumInitElements; ++i) { 205a83cc33195c7d1fa31d6809416eaa4c3ebf036ebDevang Patel Value *NewV = Visit(E->getInit(i)); 206a83cc33195c7d1fa31d6809416eaa4c3ebf036ebDevang Patel Value *Idx = llvm::ConstantInt::get(llvm::Type::Int32Ty, i); 207a83cc33195c7d1fa31d6809416eaa4c3ebf036ebDevang Patel V = Builder.CreateInsertElement(V, NewV, Idx); 20835634f5ed67966c9f1fde38420e79cc6515cd673Devang Patel } 2097019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson 2107019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson // Emit remaining default initializers 2117019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson for (/* Do not initialize i*/; i < NumVectorElements; ++i) { 2127019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson Value *Idx = llvm::ConstantInt::get(llvm::Type::Int32Ty, i); 2137019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson llvm::Value *NewV = llvm::Constant::getNullValue(ElementType); 2147019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson V = Builder.CreateInsertElement(V, NewV, Idx); 2157019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson } 2167019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson 217a83cc33195c7d1fa31d6809416eaa4c3ebf036ebDevang Patel return V; 21835634f5ed67966c9f1fde38420e79cc6515cd673Devang Patel } 21904421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 2203498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor Value *VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 2213498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor return llvm::Constant::getNullValue(ConvertType(E->getType())); 2223498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor } 2237f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitImplicitCastExpr(const ImplicitCastExpr *E); 224c62aad8f45ec3dd893376bd1c51e5e8019a76d8eEli Friedman Value *VisitCastExpr(const CastExpr *E) { 225c62aad8f45ec3dd893376bd1c51e5e8019a76d8eEli Friedman // Make sure to evaluate VLA bounds now so that we have them for later. 226c62aad8f45ec3dd893376bd1c51e5e8019a76d8eEli Friedman if (E->getType()->isVariablyModifiedType()) 227c62aad8f45ec3dd893376bd1c51e5e8019a76d8eEli Friedman CGF.EmitVLASize(E->getType()); 228c62aad8f45ec3dd893376bd1c51e5e8019a76d8eEli Friedman 2297f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitCastExpr(E->getSubExpr(), E->getType()); 2307f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2317f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitCastExpr(const Expr *E, QualType T); 2327f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 2337f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitCallExpr(const CallExpr *E) { 234e9f2f45fe9bf79bd4aea47fa1ad9204b68510fd9Anders Carlsson if (E->getCallReturnType()->isReferenceType()) 235e9f2f45fe9bf79bd4aea47fa1ad9204b68510fd9Anders Carlsson return EmitLoadOfLValue(E); 236e9f2f45fe9bf79bd4aea47fa1ad9204b68510fd9Anders Carlsson 2379b65551d0b387a7597fb39356a4d8ef10046445eChris Lattner return CGF.EmitCallExpr(E).getScalarVal(); 2387f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2398f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar 2403379320c10001d7e1ee5d7e7142c417f797cfe82Chris Lattner Value *VisitStmtExpr(const StmtExpr *E); 2414e7a1f7682d94811bd41fca8aefccc38f686db23Mike Stump 242a99038c0757a836c6faeeddaa5dfd249b32f6e9eMike Stump Value *VisitBlockDeclRefExpr(const BlockDeclRefExpr *E); 2433379320c10001d7e1ee5d7e7142c417f797cfe82Chris Lattner 2447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Unary Operators. 2457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitPrePostIncDec(const UnaryOperator *E, bool isInc, bool isPre); 2467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryPostDec(const UnaryOperator *E) { 2477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return VisitPrePostIncDec(E, false, false); 2487f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryPostInc(const UnaryOperator *E) { 2507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return VisitPrePostIncDec(E, true, false); 2517f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2527f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryPreDec(const UnaryOperator *E) { 2537f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return VisitPrePostIncDec(E, false, true); 2547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2557f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryPreInc(const UnaryOperator *E) { 2567f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return VisitPrePostIncDec(E, true, true); 2577f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2587f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryAddrOf(const UnaryOperator *E) { 2597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitLValue(E->getSubExpr()).getAddress(); 2607f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryDeref(const Expr *E) { return EmitLoadOfLValue(E); } 2627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryPlus(const UnaryOperator *E) { 2637f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // This differs from gcc, though, most likely due to a bug in gcc. 2647f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 2657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Visit(E->getSubExpr()); 2667f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryMinus (const UnaryOperator *E); 2687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryNot (const UnaryOperator *E); 2697f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryLNot (const UnaryOperator *E); 27046f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner Value *VisitUnaryReal (const UnaryOperator *E); 27146f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner Value *VisitUnaryImag (const UnaryOperator *E); 2727f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitUnaryExtension(const UnaryOperator *E) { 2737f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Visit(E->getSubExpr()); 2747f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2755a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson Value *VisitUnaryOffsetOf(const UnaryOperator *E); 2765f4307b7ba164b03c853c8d3eb4674d33f8967a6Anders Carlsson 2775f4307b7ba164b03c853c8d3eb4674d33f8967a6Anders Carlsson // C++ 27804421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Value *VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { 27904421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return Visit(DAE->getExpr()); 28004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner } 2815f4307b7ba164b03c853c8d3eb4674d33f8967a6Anders Carlsson Value *VisitCXXThisExpr(CXXThisExpr *TE) { 2825f4307b7ba164b03c853c8d3eb4674d33f8967a6Anders Carlsson return CGF.LoadCXXThis(); 2835f4307b7ba164b03c853c8d3eb4674d33f8967a6Anders Carlsson } 2845a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 2857f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson Value *VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) { 2863082463f4f387b725f4e4bf7d7b46269d445e4f5Anders Carlsson return CGF.EmitCXXExprWithTemporaries(E).getScalarVal(); 2877f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson } 288a00703dccbdc6cc4a293db38477dea7db5538c7eAnders Carlsson Value *VisitCXXNewExpr(const CXXNewExpr *E) { 289a00703dccbdc6cc4a293db38477dea7db5538c7eAnders Carlsson return CGF.EmitCXXNewExpr(E); 290a00703dccbdc6cc4a293db38477dea7db5538c7eAnders Carlsson } 2917f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 2927f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Binary Operators. 2937f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitMul(const BinOpInfo &Ops) { 294035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump if (CGF.getContext().getLangOptions().OverflowChecking 295035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump && Ops.Ty->isSignedIntegerType()) 2962add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump return EmitOverflowCheckedBinOp(Ops); 2977f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateMul(Ops.LHS, Ops.RHS, "mul"); 2987f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 2992add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump /// Create a binary op that checks for overflow. 3002add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump /// Currently only supports +, - and *. 3012add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Value *EmitOverflowCheckedBinOp(const BinOpInfo &Ops); 3027f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitDiv(const BinOpInfo &Ops); 3037f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitRem(const BinOpInfo &Ops); 3047f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitAdd(const BinOpInfo &Ops); 3057f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitSub(const BinOpInfo &Ops); 3067f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitShl(const BinOpInfo &Ops); 3077f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitShr(const BinOpInfo &Ops); 3087f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitAnd(const BinOpInfo &Ops) { 3097f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateAnd(Ops.LHS, Ops.RHS, "and"); 3107f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 3117f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitXor(const BinOpInfo &Ops) { 3127f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateXor(Ops.LHS, Ops.RHS, "xor"); 3137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 3147f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitOr (const BinOpInfo &Ops) { 3157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateOr(Ops.LHS, Ops.RHS, "or"); 3167f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 3177f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 3181f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner BinOpInfo EmitBinOps(const BinaryOperator *E); 3193ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner Value *EmitCompoundAssign(const CompoundAssignOperator *E, 3201f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner Value *(ScalarExprEmitter::*F)(const BinOpInfo &)); 3211f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 3221f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner // Binary operators and binary compound assignment operators. 3231f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner#define HANDLEBINOP(OP) \ 3243ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner Value *VisitBin ## OP(const BinaryOperator *E) { \ 3253ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner return Emit ## OP(EmitBinOps(E)); \ 3263ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner } \ 3273ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner Value *VisitBin ## OP ## Assign(const CompoundAssignOperator *E) { \ 3283ccf774256382ef9aa95028eaad82f54a3d0b0adChris Lattner return EmitCompoundAssign(E, &ScalarExprEmitter::Emit ## OP); \ 3291f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner } 3301f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Mul); 3311f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Div); 3321f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Rem); 3331f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Add); 3348c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar HANDLEBINOP(Sub); 3351f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Shl); 3361f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Shr); 3371f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(And); 3381f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Xor); 3391f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner HANDLEBINOP(Or); 3401f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner#undef HANDLEBINOP 3418c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar 3427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Comparisons. 3437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *EmitCompare(const BinaryOperator *E, unsigned UICmpOpc, 3447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner unsigned SICmpOpc, unsigned FCmpOpc); 3457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#define VISITCOMP(CODE, UI, SI, FP) \ 3467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitBin##CODE(const BinaryOperator *E) { \ 3477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitCompare(E, llvm::ICmpInst::UI, llvm::ICmpInst::SI, \ 3487f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner llvm::FCmpInst::FP); } 3497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(LT, ICMP_ULT, ICMP_SLT, FCMP_OLT); 3507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(GT, ICMP_UGT, ICMP_SGT, FCMP_OGT); 3517f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(LE, ICMP_ULE, ICMP_SLE, FCMP_OLE); 3527f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(GE, ICMP_UGE, ICMP_SGE, FCMP_OGE); 3537f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(EQ, ICMP_EQ , ICMP_EQ , FCMP_OEQ); 3547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner VISITCOMP(NE, ICMP_NE , ICMP_NE , FCMP_UNE); 3557f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner#undef VISITCOMP 3567f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 3577f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitBinAssign (const BinaryOperator *E); 3587f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 3597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitBinLAnd (const BinaryOperator *E); 3607f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitBinLOr (const BinaryOperator *E); 3617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitBinComma (const BinaryOperator *E); 3627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 3637f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Other Operators. 364df6b68c9487aed2042c7fc23db10a79f89083a11Mike Stump Value *VisitBlockExpr(const BlockExpr *BE); 3657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitConditionalOperator(const ConditionalOperator *CO); 3667f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitChooseExpr(ChooseExpr *CE); 3677c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson Value *VisitVAArgExpr(VAArgExpr *VE); 3687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *VisitObjCStringLiteral(const ObjCStringLiteral *E) { 3697f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return CGF.EmitObjCStringLiteral(E); 3707f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 3717f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner}; 3727f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} // end anonymous namespace. 3737f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 3747f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 3757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Utilities 3767f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 3777f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 3789abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner/// EmitConversionToBool - Convert the specified expression value to a 3793420d0de2c52fedf771d7ef20522f6080233e377Chris Lattner/// boolean (i1) truth value. This is equivalent to "Val != 0". 3809abc84e7ac4db891209fe67cc3a8c9690dc886efChris LattnerValue *ScalarExprEmitter::EmitConversionToBool(Value *Src, QualType SrcType) { 3819abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner assert(SrcType->isCanonical() && "EmitScalarConversion strips typedefs"); 3829abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner 3839abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner if (SrcType->isRealFloatingType()) { 3849abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner // Compare against 0.0 for fp scalars. 3859abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner llvm::Value *Zero = llvm::Constant::getNullValue(Src->getType()); 3869abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner return Builder.CreateFCmpUNE(Src, Zero, "tobool"); 3879abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner } 3889abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner 389d1d66bcd6914ff82abdfa88dd25bb0b74cde3b99Daniel Dunbar assert((SrcType->isIntegerType() || isa<llvm::PointerType>(Src->getType())) && 3909abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner "Unknown scalar type to convert"); 3919abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner 3929abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner // Because of the type rules of C, we often end up computing a logical value, 3939abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner // then zero extending it to int, then wanting it as a logical value again. 3949abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner // Optimize this common case. 3959abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner if (llvm::ZExtInst *ZI = dyn_cast<llvm::ZExtInst>(Src)) { 3969abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner if (ZI->getOperand(0)->getType() == llvm::Type::Int1Ty) { 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 } 4069abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner 4079abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner // Compare against an integer or pointer null. 4089abc84e7ac4db891209fe67cc3a8c9690dc886efChris Lattner 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; 419cf289083ab007264fa3ea96d92f133339aee5d2dChris Lattner 420cf289083ab007264fa3ea96d92f133339aee5d2dChris Lattner if (DstType->isVoidType()) return 0; 4213707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 4223707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // Handle conversions to bool first, they are special: comparisons against 0. 423ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner if (DstType->isBooleanType()) 424ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner return EmitConversionToBool(Src, SrcType); 4253707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 4263707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner const llvm::Type *DstTy = ConvertType(DstType); 4273707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 4283707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // Ignore conversions like int -> uint. 4293707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner if (Src->getType() == DstTy) 4303707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner return Src; 4313707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 432270cc66683b22d6bb0b4644f5a40f84d45edf119Daniel Dunbar // Handle pointer conversions next: pointers can only be converted 433270cc66683b22d6bb0b4644f5a40f84d45edf119Daniel Dunbar // to/from other pointers and integers. Check for pointer types in 434270cc66683b22d6bb0b4644f5a40f84d45edf119Daniel Dunbar // terms of LLVM, as some native types (like Obj-C id) may map to a 435270cc66683b22d6bb0b4644f5a40f84d45edf119Daniel Dunbar // pointer type. 436270cc66683b22d6bb0b4644f5a40f84d45edf119Daniel Dunbar if (isa<llvm::PointerType>(DstTy)) { 4373707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // The source value may be an integer, or a pointer. 4383707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner if (isa<llvm::PointerType>(Src->getType())) 4393707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner return Builder.CreateBitCast(Src, DstTy, "conv"); 4403707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner assert(SrcType->isIntegerType() && "Not ptr->ptr or int->ptr conversion?"); 44125615424741bcce31fe52c896f76268f0307f00dEli Friedman // First, convert to the correct width so that we control the kind of 44225615424741bcce31fe52c896f76268f0307f00dEli Friedman // extension. 44325615424741bcce31fe52c896f76268f0307f00dEli Friedman const llvm::Type *MiddleTy = llvm::IntegerType::get(CGF.LLVMPointerWidth); 44425615424741bcce31fe52c896f76268f0307f00dEli Friedman bool InputSigned = SrcType->isSignedIntegerType(); 44525615424741bcce31fe52c896f76268f0307f00dEli Friedman llvm::Value* IntResult = 44625615424741bcce31fe52c896f76268f0307f00dEli Friedman Builder.CreateIntCast(Src, MiddleTy, InputSigned, "conv"); 44725615424741bcce31fe52c896f76268f0307f00dEli Friedman // Then, cast to pointer. 44825615424741bcce31fe52c896f76268f0307f00dEli Friedman return Builder.CreateIntToPtr(IntResult, DstTy, "conv"); 4493707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner } 4503707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 451270cc66683b22d6bb0b4644f5a40f84d45edf119Daniel Dunbar if (isa<llvm::PointerType>(Src->getType())) { 4523707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // Must be an ptr to int cast. 4533707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner assert(isa<llvm::IntegerType>(DstTy) && "not ptr->int?"); 45450b5a30db40322880340e957ad7d6d8d60bb4c5bAnders Carlsson return Builder.CreatePtrToInt(Src, DstTy, "conv"); 4553707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner } 4563707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 457213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman // A scalar can be splatted to an extended vector of the same element type 4586fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman if (DstType->isExtVectorType() && !isa<VectorType>(SrcType)) { 4596fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman // Cast the scalar to element type 4606fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman QualType EltTy = DstType->getAsExtVectorType()->getElementType(); 4616fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman llvm::Value *Elt = EmitScalarConversion(Src, SrcType, EltTy); 4626fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman 4636fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman // Insert the element in element zero of an undef vector 4646fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman llvm::Value *UnV = llvm::UndefValue::get(DstTy); 4656fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman llvm::Value *Idx = llvm::ConstantInt::get(llvm::Type::Int32Ty, 0); 4666fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman UnV = Builder.CreateInsertElement(UnV, Elt, Idx, "tmp"); 4676fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman 4686fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman // Splat the element across to all elements 4696fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman llvm::SmallVector<llvm::Constant*, 16> Args; 4706fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman unsigned NumElements = cast<llvm::VectorType>(DstTy)->getNumElements(); 4716fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman for (unsigned i = 0; i < NumElements; i++) 4726fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman Args.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, 0)); 4736fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman 4746fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman llvm::Constant *Mask = llvm::ConstantVector::get(&Args[0], NumElements); 4756fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman llvm::Value *Yay = Builder.CreateShuffleVector(UnV, UnV, Mask, "splat"); 4766fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman return Yay; 4776fe7c8aa8c7546743ecd0ac0138c2cf5d8155386Nate Begeman } 4784119d1aeca8016654d381ce079864058d1709571Nate Begeman 4793b1ae004d0ee88fc029dad876ec5695f178ef3f6Chris Lattner // Allow bitcast from vector to integer/fp of the same size. 4807019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson if (isa<llvm::VectorType>(Src->getType()) || 4813b1ae004d0ee88fc029dad876ec5695f178ef3f6Chris Lattner isa<llvm::VectorType>(DstTy)) 4827019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson return Builder.CreateBitCast(Src, DstTy, "conv"); 4837019a9ea3f5d6f8cdf5e2e31f74b4df53e3ffcddAnders Carlsson 4843707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // Finally, we have the arithmetic types: real int/float. 4853707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner if (isa<llvm::IntegerType>(Src->getType())) { 4863707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner bool InputSigned = SrcType->isSignedIntegerType(); 487b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson if (isa<llvm::IntegerType>(DstTy)) 488b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateIntCast(Src, DstTy, InputSigned, "conv"); 489b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson else if (InputSigned) 490b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateSIToFP(Src, DstTy, "conv"); 491b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson else 492b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateUIToFP(Src, DstTy, "conv"); 4933707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner } 4943707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 4953707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner assert(Src->getType()->isFloatingPoint() && "Unknown real conversion"); 4963707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner if (isa<llvm::IntegerType>(DstTy)) { 497b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson if (DstType->isSignedIntegerType()) 498b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateFPToSI(Src, DstTy, "conv"); 499b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson else 500b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateFPToUI(Src, DstTy, "conv"); 5013707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner } 5023707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 5033707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner assert(DstTy->isFloatingPoint() && "Unknown real conversion"); 504b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson if (DstTy->getTypeID() < Src->getType()->getTypeID()) 505b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateFPTrunc(Src, DstTy, "conv"); 506b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson else 507b5ce097bb741733e24efd7803f29849be227f8ceAnders Carlsson return Builder.CreateFPExt(Src, DstTy, "conv"); 5083707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner} 5093707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 5104f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner/// EmitComplexToScalarConversion - Emit a conversion from the specified 5114f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner/// complex type to the specified destination type, where the destination 5124f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner/// type is an LLVM scalar type. 5134f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris LattnerValue *ScalarExprEmitter:: 5144f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris LattnerEmitComplexToScalarConversion(CodeGenFunction::ComplexPairTy Src, 5154f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType SrcTy, QualType DstTy) { 516ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner // Get the source element type. 5179619662a1d42e2008b865d3459c0677e149dad1bChris Lattner SrcTy = SrcTy->getAsComplexType()->getElementType(); 518ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner 519ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner // Handle conversions to bool first, they are special: comparisons against 0. 520ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner if (DstTy->isBooleanType()) { 521ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner // Complex != 0 -> (Real != 0) | (Imag != 0) 522ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner Src.first = EmitScalarConversion(Src.first, SrcTy, DstTy); 523ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner Src.second = EmitScalarConversion(Src.second, SrcTy, DstTy); 524ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner return Builder.CreateOr(Src.first, Src.second, "tobool"); 525ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner } 526ed70f0a53610e5e4d4a62cfc0be48d8c1539b5ffChris Lattner 5274f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner // C99 6.3.1.7p2: "When a value of complex type is converted to a real type, 5284f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner // the imaginary part of the complex value is discarded and the value of the 5294f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner // real part is converted according to the conversion rules for the 5304f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner // corresponding real type. 5314f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner return EmitScalarConversion(Src.first, SrcTy, DstTy); 5324f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner} 5334f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner 5344f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner 5357f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 5367f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Visitor Methods 5377f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 5387f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 5397f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitExpr(Expr *E) { 540488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(E, "scalar expression"); 5417f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (E->getType()->isVoidType()) 5427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return 0; 5437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return llvm::UndefValue::get(CGF.ConvertType(E->getType())); 5447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 5457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 546d38617c8a50f9729c254ab76cd359af797c6739bEli FriedmanValue *ScalarExprEmitter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) { 547d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman llvm::SmallVector<llvm::Constant*, 32> indices; 548d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman for (unsigned i = 2; i < E->getNumSubExprs(); i++) { 549d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman indices.push_back(cast<llvm::Constant>(CGF.EmitScalarExpr(E->getExpr(i)))); 550d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman } 551d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman Value* V1 = CGF.EmitScalarExpr(E->getExpr(0)); 552d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman Value* V2 = CGF.EmitScalarExpr(E->getExpr(1)); 553d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman Value* SV = llvm::ConstantVector::get(indices.begin(), indices.size()); 554d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman return Builder.CreateShuffleVector(V1, V2, SV, "shuffle"); 555d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman} 556d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman 5577f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 5587f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 5597f79f9be5916c51c35da4f126b7c12596a101607Mike Stump 5607f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Emit subscript expressions in rvalue context's. For most cases, this just 5617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // loads the lvalue formed by the subscript expr. However, we have to be 5627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // careful, because the base of a vector subscript is occasionally an rvalue, 5637f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // so we can't get it as an lvalue. 5647f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (!E->getBase()->getType()->isVectorType()) 5657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitLoadOfLValue(E); 5667f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 5677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Handle the vector case. The base must be a vector, the index must be an 5687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // integer value. 5697f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *Base = Visit(E->getBase()); 5707f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *Idx = Visit(E->getIdx()); 571daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman bool IdxSigned = E->getIdx()->getType()->isSignedIntegerType(); 572515ff5a31d75df9f4f099458a31cd7a405cf513dEli Friedman Idx = Builder.CreateIntCast(Idx, llvm::Type::Int32Ty, IdxSigned, 573515ff5a31d75df9f4f099458a31cd7a405cf513dEli Friedman "vecidxcast"); 5747f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateExtractElement(Base, Idx, "vecext"); 5757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 5767f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 5777f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner/// VisitImplicitCastExpr - Implicit casts are the same as normal casts, but 5787f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner/// also handle things like function to pointer-to-function decay, and array to 5797f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner/// pointer decay. 5807f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitImplicitCastExpr(const ImplicitCastExpr *E) { 5817f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner const Expr *Op = E->getSubExpr(); 5827f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 5837f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // If this is due to array->pointer conversion, emit the array expression as 5847f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // an l-value. 5857f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (Op->getType()->isArrayType()) { 5864f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner Value *V = EmitLValue(Op).getAddress(); // Bitfields can't be arrays. 5878f39f5e96ce4a5f401f431f61db7df1cf05dce6fEli Friedman 588daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // Note that VLA pointers are always decayed, so we don't need to do 589daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // anything here. 5908f39f5e96ce4a5f401f431f61db7df1cf05dce6fEli Friedman if (!Op->getType()->isVariableArrayType()) { 5918f39f5e96ce4a5f401f431f61db7df1cf05dce6fEli Friedman assert(isa<llvm::PointerType>(V->getType()) && "Expected pointer"); 5928f39f5e96ce4a5f401f431f61db7df1cf05dce6fEli Friedman assert(isa<llvm::ArrayType>(cast<llvm::PointerType>(V->getType()) 5938f39f5e96ce4a5f401f431f61db7df1cf05dce6fEli Friedman ->getElementType()) && 5948f39f5e96ce4a5f401f431f61db7df1cf05dce6fEli Friedman "Expected pointer to array"); 5958f39f5e96ce4a5f401f431f61db7df1cf05dce6fEli Friedman V = Builder.CreateStructGEP(V, 0, "arraydecay"); 596662174c82ef46b19a2329c7d37208e1d12dfb7b3Daniel Dunbar } 597a9e6372208ad77eb2cae639a8a17c86551ac1937Chris Lattner 598a9e6372208ad77eb2cae639a8a17c86551ac1937Chris Lattner // The resultant pointer type can be implicitly casted to other pointer 599f31627f676374812d0355d7e34fd2e940b400757Chris Lattner // types as well (e.g. void*) and can be implicitly converted to integer. 600f31627f676374812d0355d7e34fd2e940b400757Chris Lattner const llvm::Type *DestTy = ConvertType(E->getType()); 601f31627f676374812d0355d7e34fd2e940b400757Chris Lattner if (V->getType() != DestTy) { 602f31627f676374812d0355d7e34fd2e940b400757Chris Lattner if (isa<llvm::PointerType>(DestTy)) 603f31627f676374812d0355d7e34fd2e940b400757Chris Lattner V = Builder.CreateBitCast(V, DestTy, "ptrconv"); 604f31627f676374812d0355d7e34fd2e940b400757Chris Lattner else { 605f31627f676374812d0355d7e34fd2e940b400757Chris Lattner assert(isa<llvm::IntegerType>(DestTy) && "Unknown array decay"); 606f31627f676374812d0355d7e34fd2e940b400757Chris Lattner V = Builder.CreatePtrToInt(V, DestTy, "ptrconv"); 607f31627f676374812d0355d7e34fd2e940b400757Chris Lattner } 608f31627f676374812d0355d7e34fd2e940b400757Chris Lattner } 609a9e6372208ad77eb2cae639a8a17c86551ac1937Chris Lattner return V; 6107f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 611daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman 6127f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return EmitCastExpr(Op, E->getType()); 6137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 6147f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 6157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 6167f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// VisitCastExpr - Emit code for an explicit or implicit cast. Implicit casts 6177f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// have to handle a more broad range of conversions than explicit casts, as they 6187f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// handle things like function to ptr-to-function decay etc. 6197f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitCastExpr(const Expr *E, QualType DestTy) { 6207f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (!DestTy->isVoidType()) 6217f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 6227f79f9be5916c51c35da4f126b7c12596a101607Mike Stump 62358a2e944faa16f1f61439acd2e71b19f50189511Chris Lattner // Handle cases where the source is an non-complex type. 62419a1d7c646729eb858b15583e647262a22de3637Chris Lattner 62519a1d7c646729eb858b15583e647262a22de3637Chris Lattner if (!CGF.hasAggregateLLVMType(E->getType())) { 6263707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner Value *Src = Visit(const_cast<Expr*>(E)); 6273707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 6283707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner // Use EmitScalarConversion to perform the conversion. 6293707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner return EmitScalarConversion(Src, E->getType(), DestTy); 6303707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner } 63119a1d7c646729eb858b15583e647262a22de3637Chris Lattner 6329b2dc287177394a8f73833e2ad4f7ca8cd6f22bbChris Lattner if (E->getType()->isAnyComplexType()) { 63319a1d7c646729eb858b15583e647262a22de3637Chris Lattner // Handle cases where the source is a complex type. 6347f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool IgnoreImag = true; 6357f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool IgnoreImagAssign = true; 6367f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool IgnoreReal = IgnoreResultAssign; 6377f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool IgnoreRealAssign = IgnoreResultAssign; 6387f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (DestTy->isBooleanType()) 6397f79f9be5916c51c35da4f126b7c12596a101607Mike Stump IgnoreImagAssign = IgnoreImag = false; 6407f79f9be5916c51c35da4f126b7c12596a101607Mike Stump else if (DestTy->isVoidType()) { 6417f79f9be5916c51c35da4f126b7c12596a101607Mike Stump IgnoreReal = IgnoreImag = false; 6427f79f9be5916c51c35da4f126b7c12596a101607Mike Stump IgnoreRealAssign = IgnoreImagAssign = true; 6437f79f9be5916c51c35da4f126b7c12596a101607Mike Stump } 6447f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CodeGenFunction::ComplexPairTy V 6457f79f9be5916c51c35da4f126b7c12596a101607Mike Stump = CGF.EmitComplexExpr(E, IgnoreReal, IgnoreImag, IgnoreRealAssign, 6467f79f9be5916c51c35da4f126b7c12596a101607Mike Stump IgnoreImagAssign); 6477f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return EmitComplexToScalarConversion(V, E->getType(), DestTy); 64819a1d7c646729eb858b15583e647262a22de3637Chris Lattner } 64910b00cfe6422906b223724048b9b2123968d3baaChris Lattner 65019a1d7c646729eb858b15583e647262a22de3637Chris Lattner // Okay, this is a cast from an aggregate. It must be a cast to void. Just 65119a1d7c646729eb858b15583e647262a22de3637Chris Lattner // evaluate the result and return. 6527f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitAggExpr(E, 0, false, true); 65319a1d7c646729eb858b15583e647262a22de3637Chris Lattner return 0; 6547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 6557f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 6563379320c10001d7e1ee5d7e7142c417f797cfe82Chris LattnerValue *ScalarExprEmitter::VisitStmtExpr(const StmtExpr *E) { 65791d723da7b68be5245c3ac58aa2a36d04658cfb8Chris Lattner return CGF.EmitCompoundStmt(*E->getSubStmt(), 65891d723da7b68be5245c3ac58aa2a36d04658cfb8Chris Lattner !E->getType()->isVoidType()).getScalarVal(); 6593379320c10001d7e1ee5d7e7142c417f797cfe82Chris Lattner} 6603379320c10001d7e1ee5d7e7142c417f797cfe82Chris Lattner 661a99038c0757a836c6faeeddaa5dfd249b32f6e9eMike StumpValue *ScalarExprEmitter::VisitBlockDeclRefExpr(const BlockDeclRefExpr *E) { 662a99038c0757a836c6faeeddaa5dfd249b32f6e9eMike Stump return Builder.CreateLoad(CGF.GetAddrOfBlockDecl(E), false, "tmp"); 6634e7a1f7682d94811bd41fca8aefccc38f686db23Mike Stump} 6643379320c10001d7e1ee5d7e7142c417f797cfe82Chris Lattner 6657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 6667f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Unary Operators 6677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 6687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 6697f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitPrePostIncDec(const UnaryOperator *E, 670dfce2a51a78455c915722bc05f07c41e600220c9Chris Lattner bool isInc, bool isPre) { 6717f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LValue LV = EmitLValue(E->getSubExpr()); 672f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman QualType ValTy = E->getSubExpr()->getType(); 673f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman Value *InVal = CGF.EmitLoadOfLValue(LV, ValTy).getScalarVal(); 6747f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 6757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner int AmountVal = isInc ? 1 : -1; 676daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman 677daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman if (ValTy->isPointerType() && 678daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman ValTy->getAsPointerType()->isVariableArrayType()) { 679daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // The amount of the addition/subtraction needs to account for the VLA size 680daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman CGF.ErrorUnsupported(E, "VLA pointer inc/dec"); 681daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman } 682daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman 6837f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *NextVal; 6848cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner if (const llvm::PointerType *PT = 6858cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner dyn_cast<llvm::PointerType>(InVal->getType())) { 6868cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner llvm::Constant *Inc =llvm::ConstantInt::get(llvm::Type::Int32Ty, AmountVal); 6878cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner if (!isa<llvm::FunctionType>(PT->getElementType())) { 6888cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner NextVal = Builder.CreateGEP(InVal, Inc, "ptrincdec"); 6898cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner } else { 6908cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner const llvm::Type *i8Ty = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 6918cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner NextVal = Builder.CreateBitCast(InVal, i8Ty, "tmp"); 6928cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner NextVal = Builder.CreateGEP(NextVal, Inc, "ptrincdec"); 6938cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner NextVal = Builder.CreateBitCast(NextVal, InVal->getType()); 6948cc9d08eb8b2652ca939d724ab64dec906e418a0Chris Lattner } 695db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner } else if (InVal->getType() == llvm::Type::Int1Ty && isInc) { 696db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner // Bool++ is an interesting case, due to promotion rules, we get: 697db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner // Bool++ -> Bool = Bool+1 -> Bool = (int)Bool+1 -> 698db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner // Bool = ((int)Bool+1) != 0 699db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner // An interesting aspect of this is that increment is always true. 700db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner // Decrement does not have this property. 701db3bd4b4eabc325781a6a407c3dcf68a8d6db0f9Chris Lattner NextVal = llvm::ConstantInt::getTrue(); 702e936cc8890b94e83f530453c8c9167fb5de9b5faChris Lattner } else { 703e936cc8890b94e83f530453c8c9167fb5de9b5faChris Lattner // Add the inc/dec to the real part. 704e936cc8890b94e83f530453c8c9167fb5de9b5faChris Lattner if (isa<llvm::IntegerType>(InVal->getType())) 705e936cc8890b94e83f530453c8c9167fb5de9b5faChris Lattner NextVal = llvm::ConstantInt::get(InVal->getType(), AmountVal); 706ca2617c0e1f87c9da4d9aa3db4ea854ee2f6a1daChris Lattner else if (InVal->getType() == llvm::Type::FloatTy) 707e9b8c0a38549692f1b8f688c05c35442fc620865Devang Patel NextVal = 70859138ba7ce960888433546639deb45e2e03f8857Chris Lattner llvm::ConstantFP::get(llvm::APFloat(static_cast<float>(AmountVal))); 70925ddea7f7835c4b1804e458a5c866cde0097430aChris Lattner else if (InVal->getType() == llvm::Type::DoubleTy) 710e9b8c0a38549692f1b8f688c05c35442fc620865Devang Patel NextVal = 71159138ba7ce960888433546639deb45e2e03f8857Chris Lattner llvm::ConstantFP::get(llvm::APFloat(static_cast<double>(AmountVal))); 71225ddea7f7835c4b1804e458a5c866cde0097430aChris Lattner else { 71325ddea7f7835c4b1804e458a5c866cde0097430aChris Lattner llvm::APFloat F(static_cast<float>(AmountVal)); 714ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen bool ignored; 715ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen F.convert(CGF.Target.getLongDoubleFormat(), llvm::APFloat::rmTowardZero, 716ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen &ignored); 71725ddea7f7835c4b1804e458a5c866cde0097430aChris Lattner NextVal = llvm::ConstantFP::get(F); 718ca2617c0e1f87c9da4d9aa3db4ea854ee2f6a1daChris Lattner } 719e936cc8890b94e83f530453c8c9167fb5de9b5faChris Lattner NextVal = Builder.CreateAdd(InVal, NextVal, isInc ? "inc" : "dec"); 720e936cc8890b94e83f530453c8c9167fb5de9b5faChris Lattner } 7217f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 7227f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Store the updated result through the lvalue. 723f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman if (LV.isBitfield()) 724f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman CGF.EmitStoreThroughBitfieldLValue(RValue::get(NextVal), LV, ValTy, 725f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman &NextVal); 726f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman else 727f52bbeb1ce55aa10b4519024258b8962777fa8d4Eli Friedman CGF.EmitStoreThroughLValue(RValue::get(NextVal), LV, ValTy); 7287f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 7297f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // If this is a postinc, return the value read from memory, otherwise use the 7307f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // updated value. 7317f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return isPre ? NextVal : InVal; 7327f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 7337f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 7347f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 7357f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitUnaryMinus(const UnaryOperator *E) { 7367f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 7377f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *Op = Visit(E->getSubExpr()); 7387f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateNeg(Op, "neg"); 7397f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 7407f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 7417f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitUnaryNot(const UnaryOperator *E) { 7427f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 7437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *Op = Visit(E->getSubExpr()); 7447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateNot(Op, "neg"); 7457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 7467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 7477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitUnaryLNot(const UnaryOperator *E) { 7487f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Compare operand to zero. 7497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *BoolVal = CGF.EvaluateExprAsBool(E->getSubExpr()); 7507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 7517f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Invert value. 7527f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // TODO: Could dynamically modify easy computations here. For example, if 7537f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // the operand is an icmp ne, turn into icmp eq. 7547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner BoolVal = Builder.CreateNot(BoolVal, "lnot"); 7557f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 7569f84d88a302ea38cf0695ce8cdace47178d2fff4Anders Carlsson // ZExt result to the expr type. 7579f84d88a302ea38cf0695ce8cdace47178d2fff4Anders Carlsson return Builder.CreateZExt(BoolVal, ConvertType(E->getType()), "lnot.ext"); 7587f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 7597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 7600518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// VisitSizeOfAlignOfExpr - Return the size or alignment of the type of 7610518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// argument of the sizeof expression as an integer. 7620518999d3adcc289997bd974dce90cc97f5c1c44Sebastian RedlValue * 7630518999d3adcc289997bd974dce90cc97f5c1c44Sebastian RedlScalarExprEmitter::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) { 7640518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType TypeToSize = E->getTypeOfArgument(); 765f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman if (E->isSizeOf()) { 766f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman if (const VariableArrayType *VAT = 767f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman CGF.getContext().getAsVariableArrayType(TypeToSize)) { 768f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman if (E->isArgumentType()) { 769f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman // sizeof(type) - make sure to emit the VLA size. 770f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman CGF.EmitVLASize(TypeToSize); 7718f426fa9fca022201fc0944d6c1cb2cf9918db7dEli Friedman } else { 7728f426fa9fca022201fc0944d6c1cb2cf9918db7dEli Friedman // C99 6.5.3.4p2: If the argument is an expression of type 7738f426fa9fca022201fc0944d6c1cb2cf9918db7dEli Friedman // VLA, it is evaluated. 7748f426fa9fca022201fc0944d6c1cb2cf9918db7dEli Friedman CGF.EmitAnyExpr(E->getArgumentExpr()); 775f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman } 7766cd586d2668653501ecd73d53e81cbc76db3a18cAnders Carlsson 77796f214776c0f69069fee4d67557c8c7f416009a8Anders Carlsson return CGF.GetVLASize(VAT); 778b50525ba0e996bc072cdb76152fcfe0bc64bb72aAnders Carlsson } 7795d46315ca3cbbfe0d0f5f65520b618fb05dd4446Anders Carlsson } 780f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 781f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman // If this isn't sizeof(vla), the result must be constant; use the 782f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman // constant folding logic so we don't have to duplicate it here. 783f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman Expr::EvalResult Result; 784f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman E->Evaluate(Result, CGF.getContext()); 785f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman return llvm::ConstantInt::get(Result.Val.getInt()); 7867f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 7877f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 78846f93d021a1778442c1c4a53f0b94a68bfae3be5Chris LattnerValue *ScalarExprEmitter::VisitUnaryReal(const UnaryOperator *E) { 78946f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner Expr *Op = E->getSubExpr(); 7909b2dc287177394a8f73833e2ad4f7ca8cd6f22bbChris Lattner if (Op->getType()->isAnyComplexType()) 7917f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return CGF.EmitComplexExpr(Op, false, true, false, true).first; 79246f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner return Visit(Op); 79346f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner} 79446f93d021a1778442c1c4a53f0b94a68bfae3be5Chris LattnerValue *ScalarExprEmitter::VisitUnaryImag(const UnaryOperator *E) { 79546f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner Expr *Op = E->getSubExpr(); 7969b2dc287177394a8f73833e2ad4f7ca8cd6f22bbChris Lattner if (Op->getType()->isAnyComplexType()) 7977f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return CGF.EmitComplexExpr(Op, true, false, true, false).second; 79836f8406db837957b24b926fd657af909e1b12665Chris Lattner 7997f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // __imag on a scalar returns zero. Emit the subexpr to ensure side 8007f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // effects are evaluated, but not the actual value. 8017f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (E->isLvalue(CGF.getContext()) == Expr::LV_Valid) 8027f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitLValue(Op); 8037f79f9be5916c51c35da4f126b7c12596a101607Mike Stump else 8047f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitScalarExpr(Op, true); 80536f8406db837957b24b926fd657af909e1b12665Chris Lattner return llvm::Constant::getNullValue(ConvertType(E->getType())); 80646f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner} 80746f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner 8085a1deb8d9c0722beae28d693fa137bbb942bd11fAnders CarlssonValue *ScalarExprEmitter::VisitUnaryOffsetOf(const UnaryOperator *E) 8095a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson{ 81035183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman Value* ResultAsPtr = EmitLValue(E->getSubExpr()).getAddress(); 811769e411b72465a63454cdd416ff26ff313d43505Eli Friedman const llvm::Type* ResultType = ConvertType(E->getType()); 81235183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return Builder.CreatePtrToInt(ResultAsPtr, ResultType, "offsetof"); 8135a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson} 81446f93d021a1778442c1c4a53f0b94a68bfae3be5Chris Lattner 8157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 8167f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Binary Operators 8177f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 8187f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 8197f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerBinOpInfo ScalarExprEmitter::EmitBinOps(const BinaryOperator *E) { 8207f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 8217f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner BinOpInfo Result; 8227f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Result.LHS = Visit(E->getLHS()); 8237f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Result.RHS = Visit(E->getRHS()); 8241f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner Result.Ty = E->getType(); 8257f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Result.E = E; 8267f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Result; 8277f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 8287f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 8293ccf774256382ef9aa95028eaad82f54a3d0b0adChris LattnerValue *ScalarExprEmitter::EmitCompoundAssign(const CompoundAssignOperator *E, 8301f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner Value *(ScalarExprEmitter::*Func)(const BinOpInfo &)) { 8317f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool Ignore = TestAndClearIgnoreResultAssign(); 8321f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner QualType LHSTy = E->getLHS()->getType(), RHSTy = E->getRHS()->getType(); 8331f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 8341f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner BinOpInfo OpInfo; 8351f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 836ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman if (E->getComputationResultType()->isAnyComplexType()) { 837daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // This needs to go through the complex expression emitter, but 838ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman // it's a tad complicated to do that... I'm leaving it out for now. 839ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman // (Note that we do actually need the imaginary part of the RHS for 840ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman // multiplication and division.) 841ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman CGF.ErrorUnsupported(E, "complex compound assignment"); 842ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman return llvm::UndefValue::get(CGF.ConvertType(E->getType())); 8431f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner } 8448c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar 845cc0442fa28e5d1f403f820dcdee49911c3e622a9Mike Stump // Emit the RHS first. __block variables need to have the rhs evaluated 846cc0442fa28e5d1f403f820dcdee49911c3e622a9Mike Stump // first, plus this should improve codegen a little. 847cc0442fa28e5d1f403f820dcdee49911c3e622a9Mike Stump OpInfo.RHS = Visit(E->getRHS()); 848cc0442fa28e5d1f403f820dcdee49911c3e622a9Mike Stump OpInfo.Ty = E->getComputationResultType(); 849cc0442fa28e5d1f403f820dcdee49911c3e622a9Mike Stump OpInfo.E = E; 850ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman // Load/convert the LHS. 851ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman LValue LHSLV = EmitLValue(E->getLHS()); 852ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman OpInfo.LHS = EmitLoadOfLValue(LHSLV, LHSTy); 853ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman OpInfo.LHS = EmitScalarConversion(OpInfo.LHS, LHSTy, 854ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman E->getComputationLHSType()); 8551f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 8561f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner // Expand the binary operator. 8571f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner Value *Result = (this->*Func)(OpInfo); 8581f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 8598c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // Convert the result back to the LHS type. 860ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman Result = EmitScalarConversion(Result, E->getComputationResultType(), LHSTy); 861ab3a852ae713189444dcbf75e70accf1e8c2b7f2Eli Friedman 862ed3849b456d64d124bddc7ac044f3ce590bd9d69Daniel Dunbar // Store the result value into the LHS lvalue. Bit-fields are 863371d16f45aeec61c1d07687f763d92137e133642Daniel Dunbar // handled specially because the result is altered by the store, 864371d16f45aeec61c1d07687f763d92137e133642Daniel Dunbar // i.e., [C99 6.5.16p1] 'An assignment expression has the value of 865371d16f45aeec61c1d07687f763d92137e133642Daniel Dunbar // the left operand after the assignment...'. 8667f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (LHSLV.isBitfield()) { 8677f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (!LHSLV.isVolatileQualified()) { 8687f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitStoreThroughBitfieldLValue(RValue::get(Result), LHSLV, LHSTy, 8697f79f9be5916c51c35da4f126b7c12596a101607Mike Stump &Result); 8707f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return Result; 8717f79f9be5916c51c35da4f126b7c12596a101607Mike Stump } else 8727f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitStoreThroughBitfieldLValue(RValue::get(Result), LHSLV, LHSTy); 8737f79f9be5916c51c35da4f126b7c12596a101607Mike Stump } else 874ed3849b456d64d124bddc7ac044f3ce590bd9d69Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Result), LHSLV, LHSTy); 8757f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (Ignore) 8767f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return 0; 8777f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return EmitLoadOfLValue(LHSLV, E->getType()); 8781f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner} 8791f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 8801f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 8817f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitDiv(const BinOpInfo &Ops) { 882b3ab8dc7d3b2e24259b990ac4ad75abfd07fa1f9Nate Begeman if (Ops.LHS->getType()->isFPOrFPVector()) 8837f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateFDiv(Ops.LHS, Ops.RHS, "div"); 8841f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner else if (Ops.Ty->isUnsignedIntegerType()) 8857f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateUDiv(Ops.LHS, Ops.RHS, "div"); 8867f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner else 8877f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateSDiv(Ops.LHS, Ops.RHS, "div"); 8887f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 8897f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 8907f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitRem(const BinOpInfo &Ops) { 8917f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Rem in C can't be a floating point type: C99 6.5.5p2. 8921f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner if (Ops.Ty->isUnsignedIntegerType()) 8937f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateURem(Ops.LHS, Ops.RHS, "rem"); 8947f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner else 8957f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateSRem(Ops.LHS, Ops.RHS, "rem"); 8967f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 8977f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 8982add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike StumpValue *ScalarExprEmitter::EmitOverflowCheckedBinOp(const BinOpInfo &Ops) { 8992add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump unsigned IID; 9002add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump unsigned OpID = 0; 9015d8b2cf9fd704f6ca5e33525803a65421c0b440eMike Stump 902035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump switch (Ops.E->getOpcode()) { 903035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::Add: 904035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::AddAssign: 905035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump OpID = 1; 906035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump IID = llvm::Intrinsic::sadd_with_overflow; 907035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump break; 908035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::Sub: 909035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::SubAssign: 910035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump OpID = 2; 911035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump IID = llvm::Intrinsic::ssub_with_overflow; 912035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump break; 913035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::Mul: 914035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump case BinaryOperator::MulAssign: 915035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump OpID = 3; 916035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump IID = llvm::Intrinsic::smul_with_overflow; 917035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump break; 918035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump default: 919035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump assert(false && "Unsupported operation for overflow detection"); 920ab4eff620a9ce0ea62cdf29529a66c2c98d116f5Daniel Dunbar IID = 0; 921035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump } 922035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump OpID <<= 1; 923035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump OpID |= 1; 924035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump 9252add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump const llvm::Type *opTy = CGF.CGM.getTypes().ConvertType(Ops.Ty); 9262add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9272add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::Function *intrinsic = CGF.CGM.getIntrinsic(IID, &opTy, 1); 9282add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9292add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Value *resultAndOverflow = Builder.CreateCall2(intrinsic, Ops.LHS, Ops.RHS); 9302add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Value *result = Builder.CreateExtractValue(resultAndOverflow, 0); 9312add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Value *overflow = Builder.CreateExtractValue(resultAndOverflow, 1); 9322add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9332add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // Branch in case of overflow. 9342add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::BasicBlock *initialBB = Builder.GetInsertBlock(); 9352add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::BasicBlock *overflowBB = 9362add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump CGF.createBasicBlock("overflow", CGF.CurFn); 9372add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::BasicBlock *continueBB = 9382add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump CGF.createBasicBlock("overflow.continue", CGF.CurFn); 9392add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9402add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Builder.CreateCondBr(overflow, overflowBB, continueBB); 9412add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9422add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // Handle overflow 9432add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9442add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Builder.SetInsertPoint(overflowBB); 9452add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9462add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // Handler is: 9472add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // long long *__overflow_handler)(long long a, long long b, char op, 9482add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // char width) 9492add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump std::vector<const llvm::Type*> handerArgTypes; 9502add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump handerArgTypes.push_back(llvm::Type::Int64Ty); 9512add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump handerArgTypes.push_back(llvm::Type::Int64Ty); 9522add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump handerArgTypes.push_back(llvm::Type::Int8Ty); 9532add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump handerArgTypes.push_back(llvm::Type::Int8Ty); 9542add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::FunctionType *handlerTy = llvm::FunctionType::get(llvm::Type::Int64Ty, 9552add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump handerArgTypes, false); 9562add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::Value *handlerFunction = 9572add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump CGF.CGM.getModule().getOrInsertGlobal("__overflow_handler", 9582add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::PointerType::getUnqual(handlerTy)); 9592add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump handlerFunction = Builder.CreateLoad(handlerFunction); 9602add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9612add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::Value *handlerResult = Builder.CreateCall4(handlerFunction, 9622add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Builder.CreateSExt(Ops.LHS, llvm::Type::Int64Ty), 9632add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Builder.CreateSExt(Ops.RHS, llvm::Type::Int64Ty), 9642add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::ConstantInt::get(llvm::Type::Int8Ty, OpID), 9652add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::ConstantInt::get(llvm::Type::Int8Ty, 9662add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump cast<llvm::IntegerType>(opTy)->getBitWidth())); 9672add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9682add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump handlerResult = Builder.CreateTrunc(handlerResult, opTy); 9692add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9702add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Builder.CreateBr(continueBB); 9712add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9722add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // Set up the continuation 9732add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump Builder.SetInsertPoint(continueBB); 9742add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump // Get the correct result 9752add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump llvm::PHINode *phi = Builder.CreatePHI(opTy); 9762add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump phi->reserveOperandSpace(2); 9772add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump phi->addIncoming(result, initialBB); 9782add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump phi->addIncoming(handlerResult, overflowBB); 9792add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump 9802add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump return phi; 9812add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump} 9827f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 9837f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitAdd(const BinOpInfo &Ops) { 9842add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump if (!Ops.Ty->isPointerType()) { 985035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump if (CGF.getContext().getLangOptions().OverflowChecking 986035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump && Ops.Ty->isSignedIntegerType()) 9872add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump return EmitOverflowCheckedBinOp(Ops); 9887f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateAdd(Ops.LHS, Ops.RHS, "add"); 9892add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump } 990daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman 991daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman if (Ops.Ty->getAsPointerType()->isVariableArrayType()) { 992daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // The amount of the addition needs to account for the VLA size 993daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman CGF.ErrorUnsupported(Ops.E, "VLA pointer addition"); 994daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman } 9958f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Value *Ptr, *Idx; 9968f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Expr *IdxExp; 997b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar const PointerType *PT; 998b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar if ((PT = Ops.E->getLHS()->getType()->getAsPointerType())) { 9998f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Ptr = Ops.LHS; 10008f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Idx = Ops.RHS; 10018f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner IdxExp = Ops.E->getRHS(); 10028f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner } else { // int + pointer 1003b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar PT = Ops.E->getRHS()->getType()->getAsPointerType(); 1004b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar assert(PT && "Invalid add expr"); 10058f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Ptr = Ops.RHS; 10068f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Idx = Ops.LHS; 10078f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner IdxExp = Ops.E->getLHS(); 10088f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner } 10098f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner 10108f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner unsigned Width = cast<llvm::IntegerType>(Idx->getType())->getBitWidth(); 10117cabee5b18212bd3106aea8415b044b2b3b43518Sanjiv Gupta if (Width < CGF.LLVMPointerWidth) { 10128f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner // Zero or sign extend the pointer value based on whether the index is 10138f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner // signed or not. 10147cabee5b18212bd3106aea8415b044b2b3b43518Sanjiv Gupta const llvm::Type *IdxType = llvm::IntegerType::get(CGF.LLVMPointerWidth); 10159619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (IdxExp->getType()->isSignedIntegerType()) 10168f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Idx = Builder.CreateSExt(Idx, IdxType, "idx.ext"); 10178f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner else 10188f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner Idx = Builder.CreateZExt(Idx, IdxType, "idx.ext"); 10198f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner } 1020b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar 10212a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar const QualType ElementType = PT->getPointeeType(); 10222a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar // Handle interface types, which are not represented with a concrete 10232a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar // type. 10242a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar if (const ObjCInterfaceType *OIT = dyn_cast<ObjCInterfaceType>(ElementType)) { 10252a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar llvm::Value *InterfaceSize = 10262a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar llvm::ConstantInt::get(Idx->getType(), 10272a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar CGF.getContext().getTypeSize(OIT) / 8); 10282a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Idx = Builder.CreateMul(Idx, InterfaceSize); 10292a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar const llvm::Type *i8Ty = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 10302a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Value *Casted = Builder.CreateBitCast(Ptr, i8Ty); 10312a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Value *Res = Builder.CreateGEP(Casted, Idx, "add.ptr"); 10322a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar return Builder.CreateBitCast(Res, Ptr->getType()); 10332a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar } 10342a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar 1035b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar // Explicitly handle GNU void* and function pointer arithmetic 1036b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar // extensions. The GNU void* casts amount to no-ops since our void* 1037b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar // type is i8*, but this is future proof. 1038b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar if (ElementType->isVoidType() || ElementType->isFunctionType()) { 1039b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar const llvm::Type *i8Ty = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 1040b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar Value *Casted = Builder.CreateBitCast(Ptr, i8Ty); 10412a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Value *Res = Builder.CreateGEP(Casted, Idx, "add.ptr"); 1042b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar return Builder.CreateBitCast(Res, Ptr->getType()); 1043b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar } 10448f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner 10458f925280abe3795ae0fb47f2ba90faea62e26af4Chris Lattner return Builder.CreateGEP(Ptr, Idx, "add.ptr"); 10467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 10477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 10487f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitSub(const BinOpInfo &Ops) { 10492add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump if (!isa<llvm::PointerType>(Ops.LHS->getType())) { 1050035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump if (CGF.getContext().getLangOptions().OverflowChecking 1051035cf8911c2282550411be70f370dfe5d282b5c9Mike Stump && Ops.Ty->isSignedIntegerType()) 10522add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump return EmitOverflowCheckedBinOp(Ops); 10537f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateSub(Ops.LHS, Ops.RHS, "sub"); 10542add47387d39ee6c40dcb0e9f3d51c27ad1e113cMike Stump } 10551f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 1056daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman if (Ops.E->getLHS()->getType()->getAsPointerType()->isVariableArrayType()) { 1057daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // The amount of the addition needs to account for the VLA size for 1058daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // ptr-int 1059daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // The amount of the division needs to account for the VLA size for 1060daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // ptr-ptr. 1061daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman CGF.ErrorUnsupported(Ops.E, "VLA pointer subtraction"); 1062daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman } 1063daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman 1064b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar const QualType LHSType = Ops.E->getLHS()->getType(); 1065b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar const QualType LHSElementType = LHSType->getAsPointerType()->getPointeeType(); 10668c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar if (!isa<llvm::PointerType>(Ops.RHS->getType())) { 10678c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // pointer - int 10688c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Value *Idx = Ops.RHS; 10698c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar unsigned Width = cast<llvm::IntegerType>(Idx->getType())->getBitWidth(); 10707cabee5b18212bd3106aea8415b044b2b3b43518Sanjiv Gupta if (Width < CGF.LLVMPointerWidth) { 10718c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // Zero or sign extend the pointer value based on whether the index is 10728c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // signed or not. 10737cabee5b18212bd3106aea8415b044b2b3b43518Sanjiv Gupta const llvm::Type *IdxType = llvm::IntegerType::get(CGF.LLVMPointerWidth); 10748c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar if (Ops.E->getRHS()->getType()->isSignedIntegerType()) 10758c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Idx = Builder.CreateSExt(Idx, IdxType, "idx.ext"); 10768c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar else 10778c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Idx = Builder.CreateZExt(Idx, IdxType, "idx.ext"); 10788c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar } 10798c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Idx = Builder.CreateNeg(Idx, "sub.ptr.neg"); 1080b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar 10812a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar // Handle interface types, which are not represented with a concrete 10822a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar // type. 10832a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar if (const ObjCInterfaceType *OIT = 10842a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar dyn_cast<ObjCInterfaceType>(LHSElementType)) { 10852a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar llvm::Value *InterfaceSize = 10862a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar llvm::ConstantInt::get(Idx->getType(), 10872a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar CGF.getContext().getTypeSize(OIT) / 8); 10882a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Idx = Builder.CreateMul(Idx, InterfaceSize); 10892a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar const llvm::Type *i8Ty = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 10902a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Value *LHSCasted = Builder.CreateBitCast(Ops.LHS, i8Ty); 10912a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar Value *Res = Builder.CreateGEP(LHSCasted, Idx, "add.ptr"); 10922a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar return Builder.CreateBitCast(Res, Ops.LHS->getType()); 10932a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar } 10942a866251a80a8d88f6908f7dc68ce06d1023ec1dDaniel Dunbar 1095b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar // Explicitly handle GNU void* and function pointer arithmetic 1096b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar // extensions. The GNU void* casts amount to no-ops since our 1097b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar // void* type is i8*, but this is future proof. 1098b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar if (LHSElementType->isVoidType() || LHSElementType->isFunctionType()) { 1099b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar const llvm::Type *i8Ty = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 1100b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar Value *LHSCasted = Builder.CreateBitCast(Ops.LHS, i8Ty); 1101b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar Value *Res = Builder.CreateGEP(LHSCasted, Idx, "sub.ptr"); 1102b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar return Builder.CreateBitCast(Res, Ops.LHS->getType()); 1103b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar } 1104b09fae74acfae7af8b3d31b9638a0aa0fdf7c7acDaniel Dunbar 11058c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar return Builder.CreateGEP(Ops.LHS, Idx, "sub.ptr"); 1106820b03398fdcc8f1f6c60ace55b708e311fa8ce4Daniel Dunbar } else { 11078c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // pointer - pointer 11088c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Value *LHS = Ops.LHS; 11098c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Value *RHS = Ops.RHS; 11101f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner 11118c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar uint64_t ElementSize; 1112820b03398fdcc8f1f6c60ace55b708e311fa8ce4Daniel Dunbar 1113e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner // Handle GCC extension for pointer arithmetic on void* and function pointer 1114e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner // types. 1115e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner if (LHSElementType->isVoidType() || LHSElementType->isFunctionType()) { 11168c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar ElementSize = 1; 11178c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar } else { 11188c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar ElementSize = CGF.getContext().getTypeSize(LHSElementType) / 8; 11198c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar } 11208c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar 11218c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar const llvm::Type *ResultType = ConvertType(Ops.Ty); 11228c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar LHS = Builder.CreatePtrToInt(LHS, ResultType, "sub.ptr.lhs.cast"); 11238c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar RHS = Builder.CreatePtrToInt(RHS, ResultType, "sub.ptr.rhs.cast"); 11248c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Value *BytesBetween = Builder.CreateSub(LHS, RHS, "sub.ptr.sub"); 11258c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar 1126e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner // Optimize out the shift for element size of 1. 1127e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner if (ElementSize == 1) 1128e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner return BytesBetween; 1129e5ed15195b71b8fa440e67d49db0168bb58e4e8aChris Lattner 11308c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // HACK: LLVM doesn't have an divide instruction that 'knows' there is no 11318c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // remainder. As such, we handle common power-of-two cases here to generate 11328c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // better code. See PR2247. 11338c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar if (llvm::isPowerOf2_64(ElementSize)) { 11348c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Value *ShAmt = 11358c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar llvm::ConstantInt::get(ResultType, llvm::Log2_64(ElementSize)); 11368c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar return Builder.CreateAShr(BytesBetween, ShAmt, "sub.ptr.shr"); 11378c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar } 11388c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar 11398c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar // Otherwise, do a full sdiv. 11408c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar Value *BytesPerElt = llvm::ConstantInt::get(ResultType, ElementSize); 11418c6f57c38b1451bb28945876b0d147fd2f26e6d3Daniel Dunbar return Builder.CreateSDiv(BytesBetween, BytesPerElt, "sub.ptr.div"); 11427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 11437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 11447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 11457f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitShl(const BinOpInfo &Ops) { 11467f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // LLVM requires the LHS and RHS to be the same type: promote or truncate the 11477f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // RHS to the same size as the LHS. 11487f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHS = Ops.RHS; 11497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (Ops.LHS->getType() != RHS->getType()) 11507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner RHS = Builder.CreateIntCast(RHS, Ops.LHS->getType(), false, "sh_prom"); 11517f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 11527f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateShl(Ops.LHS, RHS, "shl"); 11537f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 11547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 11557f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitShr(const BinOpInfo &Ops) { 11567f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // LLVM requires the LHS and RHS to be the same type: promote or truncate the 11577f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // RHS to the same size as the LHS. 11587f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHS = Ops.RHS; 11597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (Ops.LHS->getType() != RHS->getType()) 11607f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner RHS = Builder.CreateIntCast(RHS, Ops.LHS->getType(), false, "sh_prom"); 11617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 11621f1ded9629529085e1673c99fb805e4d9d0b370bChris Lattner if (Ops.Ty->isUnsignedIntegerType()) 11637f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateLShr(Ops.LHS, RHS, "shr"); 11647f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateAShr(Ops.LHS, RHS, "shr"); 11657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 11667f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 11677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::EmitCompare(const BinaryOperator *E,unsigned UICmpOpc, 11687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner unsigned SICmpOpc, unsigned FCmpOpc) { 11697f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 11704f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner Value *Result; 11717f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner QualType LHSTy = E->getLHS()->getType(); 11727a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman if (!LHSTy->isAnyComplexType() && !LHSTy->isVectorType()) { 11737f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *LHS = Visit(E->getLHS()); 11747f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHS = Visit(E->getRHS()); 11757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 11767f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (LHS->getType()->isFloatingPoint()) { 11777a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman Result = Builder.CreateFCmp((llvm::CmpInst::Predicate)FCmpOpc, 11787f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS, RHS, "cmp"); 1179ec2c12646aee07bf6bb1b4092d538d5860fd0661Eli Friedman } else if (LHSTy->isSignedIntegerType()) { 1180ec2c12646aee07bf6bb1b4092d538d5860fd0661Eli Friedman Result = Builder.CreateICmp((llvm::ICmpInst::Predicate)SICmpOpc, 11817f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS, RHS, "cmp"); 11827f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } else { 1183ec2c12646aee07bf6bb1b4092d538d5860fd0661Eli Friedman // Unsigned integers and pointers. 1184ec2c12646aee07bf6bb1b4092d538d5860fd0661Eli Friedman Result = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, 11857f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS, RHS, "cmp"); 11867f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 11877a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman } else if (LHSTy->isVectorType()) { 11887a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman Value *LHS = Visit(E->getLHS()); 11897a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman Value *RHS = Visit(E->getRHS()); 11907a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman 11917a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman if (LHS->getType()->isFPOrFPVector()) { 11927a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman Result = Builder.CreateVFCmp((llvm::CmpInst::Predicate)FCmpOpc, 11937a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman LHS, RHS, "cmp"); 11947a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman } else if (LHSTy->isUnsignedIntegerType()) { 11957a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman Result = Builder.CreateVICmp((llvm::CmpInst::Predicate)UICmpOpc, 11967a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman LHS, RHS, "cmp"); 11977a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman } else { 11987a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman // Signed integers and pointers. 11997a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman Result = Builder.CreateVICmp((llvm::CmpInst::Predicate)SICmpOpc, 12007a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman LHS, RHS, "cmp"); 12017a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman } 12027a66d7b6c0d84f8c9c74c687a338cf3cf6b9c808Nate Begeman return Result; 12037f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } else { 12047f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Complex Comparison: can only be an equality comparison. 12057f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CodeGenFunction::ComplexPairTy LHS = CGF.EmitComplexExpr(E->getLHS()); 12067f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CodeGenFunction::ComplexPairTy RHS = CGF.EmitComplexExpr(E->getRHS()); 12077f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 12089619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType CETy = LHSTy->getAsComplexType()->getElementType(); 12097f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 12104f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner Value *ResultR, *ResultI; 12117f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (CETy->isRealFloatingType()) { 12127f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner ResultR = Builder.CreateFCmp((llvm::FCmpInst::Predicate)FCmpOpc, 12137f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS.first, RHS.first, "cmp.r"); 12147f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner ResultI = Builder.CreateFCmp((llvm::FCmpInst::Predicate)FCmpOpc, 12157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS.second, RHS.second, "cmp.i"); 12167f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } else { 12177f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Complex comparisons can only be equality comparisons. As such, signed 12187f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // and unsigned opcodes are the same. 12197f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner ResultR = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, 12207f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS.first, RHS.first, "cmp.r"); 12217f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner ResultI = Builder.CreateICmp((llvm::ICmpInst::Predicate)UICmpOpc, 12227f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHS.second, RHS.second, "cmp.i"); 12237f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 12247f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 12257f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner if (E->getOpcode() == BinaryOperator::EQ) { 12267f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Result = Builder.CreateAnd(ResultR, ResultI, "and.ri"); 12277f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } else { 12287f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner assert(E->getOpcode() == BinaryOperator::NE && 12297f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner "Complex comparison other than == or != ?"); 12307f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Result = Builder.CreateOr(ResultR, ResultI, "or.ri"); 12317f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 12327f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner } 123332f6209ea9a5a88ad3f8d7ad5e5b160b403d12daNuno Lopes 123432f6209ea9a5a88ad3f8d7ad5e5b160b403d12daNuno Lopes return EmitScalarConversion(Result, CGF.getContext().BoolTy, E->getType()); 12357f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 12367f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 12377f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitBinAssign(const BinaryOperator *E) { 12387f79f9be5916c51c35da4f126b7c12596a101607Mike Stump bool Ignore = TestAndClearIgnoreResultAssign(); 12397f79f9be5916c51c35da4f126b7c12596a101607Mike Stump 12407f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // __block variables need to have the rhs evaluated first, plus this should 12417f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // improve codegen just a little. 12427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHS = Visit(E->getRHS()); 124399459b67daa0a49af7c5e5e93324f6ca815c0e6aMike Stump LValue LHS = EmitLValue(E->getLHS()); 12447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1245ed3849b456d64d124bddc7ac044f3ce590bd9d69Daniel Dunbar // Store the value into the LHS. Bit-fields are handled specially 1246371d16f45aeec61c1d07687f763d92137e133642Daniel Dunbar // because the result is altered by the store, i.e., [C99 6.5.16p1] 1247371d16f45aeec61c1d07687f763d92137e133642Daniel Dunbar // 'An assignment expression has the value of the left operand after 1248daa24a29f881fb2ae53c4022e593eda1adf4b95bEli Friedman // the assignment...'. 12497f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (LHS.isBitfield()) { 12507f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (!LHS.isVolatileQualified()) { 12517f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitStoreThroughBitfieldLValue(RValue::get(RHS), LHS, E->getType(), 12527f79f9be5916c51c35da4f126b7c12596a101607Mike Stump &RHS); 12537f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return RHS; 12547f79f9be5916c51c35da4f126b7c12596a101607Mike Stump } else 12557f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitStoreThroughBitfieldLValue(RValue::get(RHS), LHS, E->getType()); 12567f79f9be5916c51c35da4f126b7c12596a101607Mike Stump } else 1257ed3849b456d64d124bddc7ac044f3ce590bd9d69Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(RHS), LHS, E->getType()); 12587f79f9be5916c51c35da4f126b7c12596a101607Mike Stump if (Ignore) 12597f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return 0; 12607f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return EmitLoadOfLValue(LHS, E->getType()); 12617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 12627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 12637f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitBinLAnd(const BinaryOperator *E) { 126420eb09d562b80420a3328be789547af354bf3e36Chris Lattner // If we have 0 && RHS, see if we can elide RHS, if so, just return 0. 126520eb09d562b80420a3328be789547af354bf3e36Chris Lattner // If we have 1 && X, just emit X without inserting the control flow. 126620eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (int Cond = CGF.ConstantFoldsToSimpleInteger(E->getLHS())) { 126720eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (Cond == 1) { // If we have 1 && X, just emit X. 12680946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); 12690946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner // ZExt result to int. 12700946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner return Builder.CreateZExt(RHSCond, CGF.LLVMIntTy, "land.ext"); 12710946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner } 127220eb09d562b80420a3328be789547af354bf3e36Chris Lattner 127320eb09d562b80420a3328be789547af354bf3e36Chris Lattner // 0 && RHS: If it is safe, just elide the RHS, and return 0. 127420eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (!CGF.ContainsLabel(E->getRHS())) 127520eb09d562b80420a3328be789547af354bf3e36Chris Lattner return llvm::Constant::getNullValue(CGF.LLVMIntTy); 12760946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner } 12770946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner 12789615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("land.end"); 12799615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("land.rhs"); 128020eb09d562b80420a3328be789547af354bf3e36Chris Lattner 1281f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Branch on the LHS first. If it is false, go to the failure (cont) block. 1282f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner CGF.EmitBranchOnBoolExpr(E->getLHS(), RHSBlock, ContBlock); 1283f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner 1284f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Any edges into the ContBlock are now from an (indeterminate number of) 1285f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // edges from this first condition. All of these values will be false. Start 1286f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // setting up the PHI node in the Cont Block for this. 1287f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner llvm::PHINode *PN = llvm::PHINode::Create(llvm::Type::Int1Ty, "", ContBlock); 1288f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner PN->reserveOperandSpace(2); // Normal case, two inputs. 1289f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner for (llvm::pred_iterator PI = pred_begin(ContBlock), PE = pred_end(ContBlock); 1290f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner PI != PE; ++PI) 1291f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner PN->addIncoming(llvm::ConstantInt::getFalse(), *PI); 12927f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 12937f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(RHSBlock); 12947f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); 12957f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 12967f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Reaquire the RHS block, as there may be subblocks inserted. 12977f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner RHSBlock = Builder.GetInsertBlock(); 1298f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner 1299f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Emit an unconditional branch from this block to ContBlock. Insert an entry 1300f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // into the phi node for the edge with the value of RHSCond. 13017f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(ContBlock); 13027f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner PN->addIncoming(RHSCond, RHSBlock); 13037f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 13047f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // ZExt result to int. 13057f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateZExt(PN, CGF.LLVMIntTy, "land.ext"); 13067f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 13077f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 13087f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitBinLOr(const BinaryOperator *E) { 130920eb09d562b80420a3328be789547af354bf3e36Chris Lattner // If we have 1 || RHS, see if we can elide RHS, if so, just return 1. 131020eb09d562b80420a3328be789547af354bf3e36Chris Lattner // If we have 0 || X, just emit X without inserting the control flow. 131120eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (int Cond = CGF.ConstantFoldsToSimpleInteger(E->getLHS())) { 131220eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (Cond == -1) { // If we have 0 || X, just emit X. 13130946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); 13140946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner // ZExt result to int. 13150946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner return Builder.CreateZExt(RHSCond, CGF.LLVMIntTy, "lor.ext"); 13160946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner } 131720eb09d562b80420a3328be789547af354bf3e36Chris Lattner 13188de8d1d3f2e21e4a72ac294276930ad293a3a765Eli Friedman // 1 || RHS: If it is safe, just elide the RHS, and return 1. 131920eb09d562b80420a3328be789547af354bf3e36Chris Lattner if (!CGF.ContainsLabel(E->getRHS())) 13208de8d1d3f2e21e4a72ac294276930ad293a3a765Eli Friedman return llvm::ConstantInt::get(CGF.LLVMIntTy, 1); 13210946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner } 13220946ccd1e58c1f1da31ddbca67c5b6301ac8b255Chris Lattner 13239615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("lor.end"); 13249615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("lor.rhs"); 13257f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1326f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Branch on the LHS first. If it is true, go to the success (cont) block. 1327f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner CGF.EmitBranchOnBoolExpr(E->getLHS(), ContBlock, RHSBlock); 1328f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner 1329f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Any edges into the ContBlock are now from an (indeterminate number of) 1330f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // edges from this first condition. All of these values will be true. Start 1331f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // setting up the PHI node in the Cont Block for this. 1332f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner llvm::PHINode *PN = llvm::PHINode::Create(llvm::Type::Int1Ty, "", ContBlock); 1333f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner PN->reserveOperandSpace(2); // Normal case, two inputs. 1334f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner for (llvm::pred_iterator PI = pred_begin(ContBlock), PE = pred_end(ContBlock); 1335f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner PI != PE; ++PI) 1336f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner PN->addIncoming(llvm::ConstantInt::getTrue(), *PI); 1337f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner 1338f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Emit the RHS condition as a bool value. 13397f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(RHSBlock); 13407f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS()); 13417f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 13427f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Reaquire the RHS block, as there may be subblocks inserted. 13437f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner RHSBlock = Builder.GetInsertBlock(); 13447f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1345f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // Emit an unconditional branch from this block to ContBlock. Insert an entry 1346f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner // into the phi node for the edge with the value of RHSCond. 1347f7b5ea9de3d043fa900ab8a8976a4c0eefc233b7Chris Lattner CGF.EmitBlock(ContBlock); 13487f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner PN->addIncoming(RHSCond, RHSBlock); 13497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 13507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // ZExt result to int. 13517f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Builder.CreateZExt(PN, CGF.LLVMIntTy, "lor.ext"); 13527f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 13537f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 13547f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitBinComma(const BinaryOperator *E) { 13557f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitStmt(E->getLHS()); 1356a448fb2da03ece39978784793eea68760e8205a1Daniel Dunbar CGF.EnsureInsertPoint(); 13577f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return Visit(E->getRHS()); 13587f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 13597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 13607f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 13617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Other Operators 13627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 13637f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 13649802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner/// isCheapEnoughToEvaluateUnconditionally - Return true if the specified 13659802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner/// expression is cheap enough and side-effect-free enough to evaluate 13669802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner/// unconditionally instead of conditionally. This is used to convert control 13679802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner/// flow into selects in some cases. 13689802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattnerstatic bool isCheapEnoughToEvaluateUnconditionally(const Expr *E) { 13699802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner if (const ParenExpr *PE = dyn_cast<ParenExpr>(E)) 13709802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner return isCheapEnoughToEvaluateUnconditionally(PE->getSubExpr()); 13719802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner 13729802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner // TODO: Allow anything we can constant fold to an integer or fp constant. 13739802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner if (isa<IntegerLiteral>(E) || isa<CharacterLiteral>(E) || 13749802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner isa<FloatingLiteral>(E)) 13759802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner return true; 13769802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner 13779802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner // Non-volatile automatic variables too, to get "cond ? X : Y" where 13789802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner // X and Y are local variables. 13799802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 13809802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) 13819802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner if (VD->hasLocalStorage() && !VD->getType().isVolatileQualified()) 13829802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner return true; 13839802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner 13849802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner return false; 13859802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner} 13869802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner 13879802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner 13887f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter:: 13897f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerVisitConditionalOperator(const ConditionalOperator *E) { 13907f79f9be5916c51c35da4f126b7c12596a101607Mike Stump TestAndClearIgnoreResultAssign(); 139131a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // If the condition constant folds and can be elided, try to avoid emitting 139231a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // the condition and the dead arm. 139331a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (int Cond = CGF.ConstantFoldsToSimpleInteger(E->getCond())){ 1394c657e92d7b44568fe39ae018a69b18cbcc4ea3b0Chris Lattner Expr *Live = E->getLHS(), *Dead = E->getRHS(); 139531a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if (Cond == -1) 1396c657e92d7b44568fe39ae018a69b18cbcc4ea3b0Chris Lattner std::swap(Live, Dead); 139731a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner 139831a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // If the dead side doesn't have labels we need, and if the Live side isn't 139931a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // the gnu missing ?: extension (which we could handle, but don't bother 140031a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner // to), just emit the Live part. 140131a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner if ((!Dead || !CGF.ContainsLabel(Dead)) && // No labels in dead part 140231a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner Live) // Live part isn't missing. 140331a0984b5cb4af99d2407c0f25bf5af68df681c6Chris Lattner return Visit(Live); 1404c657e92d7b44568fe39ae018a69b18cbcc4ea3b0Chris Lattner } 1405c657e92d7b44568fe39ae018a69b18cbcc4ea3b0Chris Lattner 14069802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner 14079802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner // If this is a really simple expression (like x ? 4 : 5), emit this as a 14089802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner // select instead of as control flow. We can only do this if it is cheap and 1409531a550531c144a58438f187816abbf1879e1c4eChris Lattner // safe to evaluate the LHS and RHS unconditionally. 14109802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner if (E->getLHS() && isCheapEnoughToEvaluateUnconditionally(E->getLHS()) && 14119802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner isCheapEnoughToEvaluateUnconditionally(E->getRHS())) { 14129802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner llvm::Value *CondV = CGF.EvaluateExprAsBool(E->getCond()); 14139802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner llvm::Value *LHS = Visit(E->getLHS()); 14149802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner llvm::Value *RHS = Visit(E->getRHS()); 14159802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner return Builder.CreateSelect(CondV, LHS, RHS, "cond"); 14169802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner } 14179802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner 14189802a5173ffd403d9ede2d4b6b6107fa2e220544Chris Lattner 1419be65abc8e41213ecb951f2f507fb2e13a151d30cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 1420be65abc8e41213ecb951f2f507fb2e13a151d30cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 14219615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 1422035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner Value *CondVal = 0; 1423035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner 142412d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // If we don't have the GNU missing condition extension, emit a branch on 142512d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // bool the normal way. 142612d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner if (E->getLHS()) { 142712d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // Otherwise, just use EmitBranchOnBoolExpr to get small and simple code for 142812d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // the branch on bool. 142912d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock); 143012d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner } else { 143112d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // Otherwise, for the ?: extension, evaluate the conditional and then 143212d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // convert it to bool the hard way. We do this explicitly because we need 143312d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // the unconverted value for the missing middle value of the ?:. 1434035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner CondVal = CGF.EmitScalarExpr(E->getCond()); 143512d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner 143612d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // In some cases, EmitScalarConversion will delete the "CondVal" expression 143712d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // if there are no extra uses (an optimization). Inhibit this by making an 143812d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // extra dead use, because we're going to add a use of CondVal later. We 143912d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // don't use the builder for this, because we don't want it to get optimized 144012d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner // away. This leaves dead code, but the ?: extension isn't common. 144112d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner new llvm::BitCastInst(CondVal, CondVal->getType(), "dummy?:holder", 144212d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner Builder.GetInsertBlock()); 144312d152f61ccef9a2c0372ba39be7cf416c6e1a9eChris Lattner 1444035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner Value *CondBoolVal = 1445035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner CGF.EmitScalarConversion(CondVal, E->getCond()->getType(), 1446035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner CGF.getContext().BoolTy); 1447035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner Builder.CreateCondBr(CondBoolVal, LHSBlock, RHSBlock); 1448035cf4294319271ad19ddcc5ba327c8365f3575eChris Lattner } 14497f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 14507f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(LHSBlock); 14517f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 14527f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Handle the GNU extension for missing LHS. 1453a21ddb30e56026967d58e26c5212744e1831305bChris Lattner Value *LHS; 1454a21ddb30e56026967d58e26c5212744e1831305bChris Lattner if (E->getLHS()) 1455856226c37ff10955c7f3f07ce6fa9522da23a3a5Eli Friedman LHS = Visit(E->getLHS()); 1456a21ddb30e56026967d58e26c5212744e1831305bChris Lattner else // Perform promotions, to handle cases like "short ?: int" 1457a21ddb30e56026967d58e26c5212744e1831305bChris Lattner LHS = EmitScalarConversion(CondVal, E->getCond()->getType(), E->getType()); 1458a21ddb30e56026967d58e26c5212744e1831305bChris Lattner 14597f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner LHSBlock = Builder.GetInsertBlock(); 1460d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 14617f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 14627f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(RHSBlock); 14637f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1464856226c37ff10955c7f3f07ce6fa9522da23a3a5Eli Friedman Value *RHS = Visit(E->getRHS()); 14657f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner RHSBlock = Builder.GetInsertBlock(); 1466d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 14677f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 14687f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner CGF.EmitBlock(ContBlock); 14697f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 1470108f55d6fd9a1c0e753eb8e046cb1f1b81d77a76Nuno Lopes if (!LHS || !RHS) { 14712202bce80fc72d067cbe67dc1512f7b45351fd31Chris Lattner assert(E->getType()->isVoidType() && "Non-void value should have a value"); 14722202bce80fc72d067cbe67dc1512f7b45351fd31Chris Lattner return 0; 14732202bce80fc72d067cbe67dc1512f7b45351fd31Chris Lattner } 14742202bce80fc72d067cbe67dc1512f7b45351fd31Chris Lattner 14757f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner // Create a PHI node for the real part. 14767f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner llvm::PHINode *PN = Builder.CreatePHI(LHS->getType(), "cond"); 14777f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner PN->reserveOperandSpace(2); 14787f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner PN->addIncoming(LHS, LHSBlock); 14797f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner PN->addIncoming(RHS, RHSBlock); 14807f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner return PN; 14817f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 14827f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 14837f02f721d48772e4eee4fccd8af4f800be1bbc1eChris LattnerValue *ScalarExprEmitter::VisitChooseExpr(ChooseExpr *E) { 14847976932a1c256d447316ffac58e9821417725e34Eli Friedman return Visit(E->getChosenSubExpr(CGF.getContext())); 14857f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 14867f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 14872202bce80fc72d067cbe67dc1512f7b45351fd31Chris LattnerValue *ScalarExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 14884fd0aa5803357d8c72eeac2cae15e12649ea08feEli Friedman llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); 1489ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 1490ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 1491ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson // If EmitVAArg fails, we fall back to the LLVM instruction. 1492ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson if (!ArgPtr) 1493ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson return Builder.CreateVAArg(ArgValue, ConvertType(VE->getType())); 1494ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 14957f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // FIXME Volatility. 1496ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson return Builder.CreateLoad(ArgPtr); 14977c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson} 14987c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson 1499df6b68c9487aed2042c7fc23db10a79f89083a11Mike StumpValue *ScalarExprEmitter::VisitBlockExpr(const BlockExpr *BE) { 15000892099dbc640720400a1d9decd2733a09d733e5Mike Stump return CGF.BuildBlockLiteralTmp(BE); 1501df6b68c9487aed2042c7fc23db10a79f89083a11Mike Stump} 1502df6b68c9487aed2042c7fc23db10a79f89083a11Mike Stump 15037f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 15047f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner// Entry Point into this File 15057f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner//===----------------------------------------------------------------------===// 15067f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 15077f79f9be5916c51c35da4f126b7c12596a101607Mike Stump/// EmitScalarExpr - Emit the computation of the specified expression of 15087f79f9be5916c51c35da4f126b7c12596a101607Mike Stump/// scalar type, ignoring the result. 15097f79f9be5916c51c35da4f126b7c12596a101607Mike StumpValue *CodeGenFunction::EmitScalarExpr(const Expr *E, bool IgnoreResultAssign) { 15107f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner assert(E && !hasAggregateLLVMType(E->getType()) && 15117f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner "Invalid scalar expression to emit"); 15127f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner 15137f79f9be5916c51c35da4f126b7c12596a101607Mike Stump return ScalarExprEmitter(*this, IgnoreResultAssign) 15147f79f9be5916c51c35da4f126b7c12596a101607Mike Stump .Visit(const_cast<Expr*>(E)); 15157f02f721d48772e4eee4fccd8af4f800be1bbc1eChris Lattner} 15163707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner 15173707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner/// EmitScalarConversion - Emit a conversion from the specified type to the 15183707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner/// specified destination type, both of which are LLVM scalar types. 15194f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris LattnerValue *CodeGenFunction::EmitScalarConversion(Value *Src, QualType SrcTy, 15204f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType DstTy) { 15213707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner assert(!hasAggregateLLVMType(SrcTy) && !hasAggregateLLVMType(DstTy) && 15223707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner "Invalid scalar expression to emit"); 15233707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner return ScalarExprEmitter(*this).EmitScalarConversion(Src, SrcTy, DstTy); 15243707b255f8993fb362904c9cff87b0e9bc6ca317Chris Lattner} 15254f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner 15264f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner/// EmitComplexToScalarConversion - Emit a conversion from the specified 15274f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner/// complex type to the specified destination type, where the destination 15284f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner/// type is an LLVM scalar type. 15294f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris LattnerValue *CodeGenFunction::EmitComplexToScalarConversion(ComplexPairTy Src, 15304f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType SrcTy, 15314f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner QualType DstTy) { 15329b2dc287177394a8f73833e2ad4f7ca8cd6f22bbChris Lattner assert(SrcTy->isAnyComplexType() && !hasAggregateLLVMType(DstTy) && 15334f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner "Invalid complex -> scalar conversion"); 15344f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner return ScalarExprEmitter(*this).EmitComplexToScalarConversion(Src, SrcTy, 15354f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner DstTy); 15364f1a7b380809b4ca19ad2daff61bc11cd1e979d8Chris Lattner} 1537cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson 1538cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders CarlssonValue *CodeGenFunction::EmitShuffleVector(Value* V1, Value *V2, ...) { 1539cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson assert(V1->getType() == V2->getType() && 1540cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson "Vector operands must be of the same type"); 1541cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson unsigned NumElements = 1542cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson cast<llvm::VectorType>(V1->getType())->getNumElements(); 1543cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson 1544cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson va_list va; 1545cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson va_start(va, V2); 1546cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson 1547cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson llvm::SmallVector<llvm::Constant*, 16> Args; 1548cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson for (unsigned i = 0; i < NumElements; i++) { 1549cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson int n = va_arg(va, int); 1550cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson assert(n >= 0 && n < (int)NumElements * 2 && 1551cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson "Vector shuffle index out of bounds!"); 1552cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson Args.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, n)); 1553cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson } 1554cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson 1555cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson const char *Name = va_arg(va, const char *); 1556cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson va_end(va); 1557cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson 1558cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson llvm::Constant *Mask = llvm::ConstantVector::get(&Args[0], NumElements); 1559cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson 1560cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson return Builder.CreateShuffleVector(V1, V2, Mask, Name); 1561cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson} 1562cc23acae84c6d5c37b4805edbcd95ee5d821c400Anders Carlsson 15636086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlssonllvm::Value *CodeGenFunction::EmitVector(llvm::Value * const *Vals, 1564345f7209692b116ca433a3196c1e3c998e0ffcdeChris Lattner unsigned NumVals, bool isSplat) { 15656086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlsson llvm::Value *Vec 1566345f7209692b116ca433a3196c1e3c998e0ffcdeChris Lattner = llvm::UndefValue::get(llvm::VectorType::get(Vals[0]->getType(), NumVals)); 15676086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlsson 1568345f7209692b116ca433a3196c1e3c998e0ffcdeChris Lattner for (unsigned i = 0, e = NumVals; i != e; ++i) { 15694119d1aeca8016654d381ce079864058d1709571Nate Begeman llvm::Value *Val = isSplat ? Vals[0] : Vals[i]; 15706086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlsson llvm::Value *Idx = llvm::ConstantInt::get(llvm::Type::Int32Ty, i); 15714119d1aeca8016654d381ce079864058d1709571Nate Begeman Vec = Builder.CreateInsertElement(Vec, Val, Idx, "tmp"); 15726086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlsson } 15736086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlsson 15746086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlsson return Vec; 15756086bbd1799e22e75561c3d31dc9b923f0508fa5Anders Carlsson} 1576