CGExprAgg.cpp revision 45d196b8387dcefc4df26cda114fa34c6528e928
1566b6ce741c742cc3f8cb85e2376ec4a3490ff5fChris Lattner//===--- CGExprAgg.cpp - Emit LLVM Code from Aggregate Expressions --------===// 2af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 3af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// The LLVM Compiler Infrastructure 4af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 7af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 8af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner//===----------------------------------------------------------------------===// 9af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 10af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// This contains code to emit Aggregate Expr nodes as LLVM code. 11af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 12af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner//===----------------------------------------------------------------------===// 13af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner 14af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner#include "CodeGenFunction.h" 15883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "CodeGenModule.h" 16de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/ASTContext.h" 17de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/StmtVisitor.h" 18883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "llvm/Constants.h" 19883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "llvm/Function.h" 20636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel#include "llvm/GlobalVariable.h" 219c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner#include "llvm/Support/Compiler.h" 22f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner#include "llvm/Intrinsics.h" 23af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattnerusing namespace clang; 24af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattnerusing namespace CodeGen; 25883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 269c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner//===----------------------------------------------------------------------===// 279c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner// Aggregate Expression Emitter 289c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner//===----------------------------------------------------------------------===// 299c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 309c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnernamespace { 319c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnerclass VISIBILITY_HIDDEN AggExprEmitter : public StmtVisitor<AggExprEmitter> { 329c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CodeGenFunction &CGF; 3345d196b8387dcefc4df26cda114fa34c6528e928Daniel Dunbar CGBuilderTy &Builder; 349c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner llvm::Value *DestPtr; 359c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner bool VolatileDest; 369c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnerpublic: 379c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner AggExprEmitter(CodeGenFunction &cgf, llvm::Value *destPtr, bool volatileDest) 38bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner : CGF(cgf), Builder(CGF.Builder), 39bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner DestPtr(destPtr), VolatileDest(volatileDest) { 409c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner } 419c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 42ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 43ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner // Utilities 44ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 45ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 469c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// EmitAggLoadOfLValue - Given an expression with aggregate type that 479c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// represents a value lvalue, this method emits the address of the lvalue, 489c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// then loads the result into DestPtr. 499c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void EmitAggLoadOfLValue(const Expr *E); 509c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 5113e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio void EmitNonConstInit(InitListExpr *E); 52922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 53ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 54ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner // Visitor Methods 55ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 56ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 579c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitStmt(Stmt *S) { 58488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(S, "aggregate expression"); 599c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner } 609c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitParenExpr(ParenExpr *PE) { Visit(PE->getSubExpr()); } 619c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 629c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // l-values. 639b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitDeclRefExpr(DeclRefExpr *DRE) { EmitAggLoadOfLValue(DRE); } 649b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitMemberExpr(MemberExpr *ME) { EmitAggLoadOfLValue(ME); } 659b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitUnaryDeref(UnaryOperator *E) { EmitAggLoadOfLValue(E); } 66ad6ebd6efcc30cc54540ed9d92256b410519ec0fSeo Sanghyeon void VisitStringLiteral(StringLiteral *E) { EmitAggLoadOfLValue(E); } 67b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman void VisitCompoundLiteralExpr(CompoundLiteralExpr *E) 68b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman { EmitAggLoadOfLValue(E); } 699b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon 709b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 719b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon EmitAggLoadOfLValue(E); 729b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon } 739c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 749c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // Operators. 759c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // case Expr::UnaryOperatorClass: 769c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // case Expr::CastExprClass: 77e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson void VisitImplicitCastExpr(ImplicitCastExpr *E); 78148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson void VisitCallExpr(const CallExpr *E); 79b2d963f527674275c9109252474948368b6e6161Chris Lattner void VisitStmtExpr(const StmtExpr *E); 809c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitBinaryOperator(const BinaryOperator *BO); 8103d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattner void VisitBinAssign(const BinaryOperator *E); 82796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman void VisitOverloadExpr(const OverloadExpr *E); 8307fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman void VisitBinComma(const BinaryOperator *E); 849c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 858fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner void VisitObjCMessageExpr(ObjCMessageExpr *E); 860a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar void VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { 870a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar EmitAggLoadOfLValue(E); 880a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar } 899c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar void VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E); 909c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 919c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitConditionalOperator(const ConditionalOperator *CO); 92636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel void VisitInitListExpr(InitListExpr *E); 9304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { 9404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Visit(DAE->getExpr()); 9504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner } 96b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman void VisitVAArgExpr(VAArgExpr *E); 97f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 98f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitInitializationToLValue(Expr *E, LValue Address); 99f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitNullInitializationToLValue(LValue Address, QualType T); 1009c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // case Expr::ChooseExprClass: 101305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 1029c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner}; 1039c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner} // end anonymous namespace. 1049c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 105ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 106ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Utilities 107ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 1089c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 109883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// EmitAggLoadOfLValue - Given an expression with aggregate type that 110883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// represents a value lvalue, this method emits the address of the lvalue, 111883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// then loads the result into DestPtr. 1129c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::EmitAggLoadOfLValue(const Expr *E) { 1139c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LV = CGF.EmitLValue(E); 114883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(LV.isSimple() && "Can't have aggregate bitfield, vector, etc"); 115883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner llvm::Value *SrcPtr = LV.getAddress(); 116883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 117883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // If the result is ignored, don't copy from the value. 118883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner if (DestPtr == 0) 119883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // FIXME: If the source is volatile, we must read from it. 120883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner return; 121883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 1227482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, SrcPtr, E->getType()); 123883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 124883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 125ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 126ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Visitor Methods 127ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 128ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 1299619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitImplicitCastExpr(ImplicitCastExpr *E) { 130ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman assert(CGF.getContext().typesAreCompatible( 1319619662a1d42e2008b865d3459c0677e149dad1bChris Lattner E->getSubExpr()->getType().getUnqualifiedType(), 1329619662a1d42e2008b865d3459c0677e149dad1bChris Lattner E->getType().getUnqualifiedType()) && 1339619662a1d42e2008b865d3459c0677e149dad1bChris Lattner "Implicit cast types must be compatible"); 134e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson Visit(E->getSubExpr()); 135e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson} 136e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson 1379619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitCallExpr(const CallExpr *E) { 138148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson RValue RV = CGF.EmitCallExpr(E); 139148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson assert(RV.isAggregate() && "Return value must be aggregate value!"); 140148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 141148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson // If the result is ignored, don't copy from the value. 142148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson if (DestPtr == 0) 143796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman // FIXME: If the source is volatile, we must read from it. 144796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman return; 145796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 1467482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 147796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 1489619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 1499619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 1508f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar RValue RV = CGF.EmitObjCMessageExpr(E); 1518f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar assert(RV.isAggregate() && "Return value must be aggregate value!"); 1528fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 1538fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // If the result is ignored, don't copy from the value. 1548fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner if (DestPtr == 0) 1558f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar // FIXME: If the source is volatile, we must read from it. 1568fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner return; 1578fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 1587482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 1598fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 160796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 1619c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbarvoid AggExprEmitter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 1629c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar RValue RV = CGF.EmitObjCPropertyGet(E); 1639c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar assert(RV.isAggregate() && "Return value must be aggregate value!"); 1649c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar 1659c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar // If the result is ignored, don't copy from the value. 1669c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar if (DestPtr == 0) 1679c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar // FIXME: If the source is volatile, we must read from it. 1689c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar return; 1699c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar 1707482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 1719c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar} 1729c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar 1739619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitOverloadExpr(const OverloadExpr *E) { 174796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman RValue RV = CGF.EmitCallExpr(E->getFn(), E->arg_begin(), 1755549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek E->arg_end(CGF.getContext())); 1765549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek 177796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman assert(RV.isAggregate() && "Return value must be aggregate value!"); 178796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 179796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman // If the result is ignored, don't copy from the value. 180796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman if (DestPtr == 0) 181148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson // FIXME: If the source is volatile, we must read from it. 182148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson return; 183148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 1847482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 185148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson} 186148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 1879619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 18807fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman CGF.EmitAnyExpr(E->getLHS()); 18907fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman CGF.EmitAggExpr(E->getRHS(), DestPtr, false); 19007fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 19107fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 192b2d963f527674275c9109252474948368b6e6161Chris Lattnervoid AggExprEmitter::VisitStmtExpr(const StmtExpr *E) { 193b2d963f527674275c9109252474948368b6e6161Chris Lattner CGF.EmitCompoundStmt(*E->getSubStmt(), true, DestPtr, VolatileDest); 194b2d963f527674275c9109252474948368b6e6161Chris Lattner} 195b2d963f527674275c9109252474948368b6e6161Chris Lattner 1969c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) { 197488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(E, "aggregate binary expression"); 198ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 199ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 20003d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattnervoid AggExprEmitter::VisitBinAssign(const BinaryOperator *E) { 201ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // For an assignment to work, the value on the right has 202ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // to be compatible with the value on the left. 203ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman assert(CGF.getContext().typesAreCompatible( 204ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman E->getLHS()->getType().getUnqualifiedType(), 205ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman E->getRHS()->getType().getUnqualifiedType()) 206ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman && "Invalid assignment"); 2079c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LHS = CGF.EmitLValue(E->getLHS()); 208883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2097f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // We have to special case property setters, otherwise we must have 2107f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // a simple lvalue (no aggregates inside vectors, bitfields). 2117f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (LHS.isPropertyRef()) { 2127f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // FIXME: Volatility? 2137f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar llvm::Value *AggLoc = DestPtr; 2147f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (!AggLoc) 2157f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 2167f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar CGF.EmitAggExpr(E->getRHS(), AggLoc, false); 2177f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), 2187f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar RValue::getAggregate(AggLoc)); 2197f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } else { 2207f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // Codegen the RHS so that it stores directly into the LHS. 2217f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar CGF.EmitAggExpr(E->getRHS(), LHS.getAddress(), false /*FIXME: VOLATILE LHS*/); 2227f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar 2237f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (DestPtr == 0) 2247f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar return; 2257f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar 2267f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // If the result of the assignment is used, copy the RHS there also. 2277482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, LHS.getAddress(), E->getType()); 2287f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } 229883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 230883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2319c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) { 232984d0b414bc76d3530b9bc55a5a55834ba76c607Gabor Greif llvm::BasicBlock *LHSBlock = llvm::BasicBlock::Create("cond.?"); 233984d0b414bc76d3530b9bc55a5a55834ba76c607Gabor Greif llvm::BasicBlock *RHSBlock = llvm::BasicBlock::Create("cond.:"); 234984d0b414bc76d3530b9bc55a5a55834ba76c607Gabor Greif llvm::BasicBlock *ContBlock = llvm::BasicBlock::Create("cond.cont"); 235883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2369c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner llvm::Value *Cond = CGF.EvaluateExprAsBool(E->getCond()); 237bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner Builder.CreateCondBr(Cond, LHSBlock, RHSBlock); 238883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2399c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(LHSBlock); 240883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 241883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // Handle the GNU extension for missing LHS. 242883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(E->getLHS() && "Must have LHS for aggregate value"); 243883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 244c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getLHS()); 245bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner Builder.CreateBr(ContBlock); 246bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner LHSBlock = Builder.GetInsertBlock(); 247883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2489c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(RHSBlock); 249883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 250c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getRHS()); 251bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner Builder.CreateBr(ContBlock); 252bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner RHSBlock = Builder.GetInsertBlock(); 253883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2549c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 255883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 256ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 257b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 258b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman llvm::Value *ArgValue = CGF.EmitLValue(VE->getSubExpr()).getAddress(); 259b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman llvm::Value *V = Builder.CreateVAArg(ArgValue, CGF.ConvertType(VE->getType())); 260b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman if (DestPtr) 2611e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 262b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman Builder.CreateStore(V, DestPtr); 263b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 264b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 26513e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venanciovoid AggExprEmitter::EmitNonConstInit(InitListExpr *E) { 266be20bb558cae5352898e6a913e29d24d20134841Chris Lattner if (E->hadDesignators()) { 267be20bb558cae5352898e6a913e29d24d20134841Chris Lattner CGF.ErrorUnsupported(E, "initializer list with designators"); 268be20bb558cae5352898e6a913e29d24d20134841Chris Lattner return; 269be20bb558cae5352898e6a913e29d24d20134841Chris Lattner } 270be20bb558cae5352898e6a913e29d24d20134841Chris Lattner 27113e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio const llvm::PointerType *APType = 27213e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio cast<llvm::PointerType>(DestPtr->getType()); 27313e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio const llvm::Type *DestType = APType->getElementType(); 274305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 27513e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio if (const llvm::ArrayType *AType = dyn_cast<llvm::ArrayType>(DestType)) { 27613e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio unsigned NumInitElements = E->getNumInits(); 277305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 278305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio unsigned i; 279305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio for (i = 0; i != NumInitElements; ++i) { 28036b6a0a63e87803a85080c639ad8b61e8bb5f9eeChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 28113e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio Expr *Init = E->getInit(i); 28213e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio if (isa<InitListExpr>(Init)) 28313e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio CGF.EmitAggExpr(Init, NextVal, VolatileDest); 28413e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio else 2851e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 28613e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio Builder.CreateStore(CGF.EmitScalarExpr(Init), NextVal); 287305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio } 288636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 289305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio // Emit remaining default initializers 290305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio unsigned NumArrayElements = AType->getNumElements(); 29113e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio QualType QType = E->getInit(0)->getType(); 29213e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio const llvm::Type *EType = AType->getElementType(); 293305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio for (/*Do not initialize i*/; i < NumArrayElements; ++i) { 29436b6a0a63e87803a85080c639ad8b61e8bb5f9eeChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 295d79a726dc3c8af61b486948c97a183c7fe5b0179Dan Gohman if (EType->isSingleValueType()) 2961e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 29713e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio Builder.CreateStore(llvm::Constant::getNullValue(EType), NextVal); 29813e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio else 2997482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateClear(NextVal, QType); 300305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio } 30113e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio } else 30213e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio assert(false && "Invalid initializer"); 303305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio} 304636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 305f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV) { 306f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 307f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isComplexType()) { 308f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 309c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else if (CGF.hasAggregateLLVMType(E->getType())) { 310c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitAnyExpr(E, LV.getAddress(), false); 311c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 312c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, E->getType()); 313f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 314f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 315305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 316f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitNullInitializationToLValue(LValue LV, QualType T) { 317f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (!CGF.hasAggregateLLVMType(T)) { 318f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // For non-aggregates, we can store zero 31982397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar llvm::Value *Null = llvm::Constant::getNullValue(CGF.ConvertType(T)); 32082397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Null), LV, T); 321f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 322f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Otherwise, just memset the whole thing to zero. This is legal 323f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // because in LLVM, all default initializers are guaranteed to have a 324f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // bit pattern of all zeros. 325f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 326f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 327f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 328f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *MemSet = CGF.CGM.getIntrinsic(llvm::Intrinsic::memset_i64); 329f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t Size = CGF.getContext().getTypeSize(T); 330f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 331f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::Type *BP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 332f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value* DestPtr = Builder.CreateBitCast(LV.getAddress(), BP, "tmp"); 3333eae03e7d165f20a863a9a4d7122ba2a691ab16dChris Lattner Builder.CreateCall4(MemSet, DestPtr, 3343eae03e7d165f20a863a9a4d7122ba2a691ab16dChris Lattner llvm::ConstantInt::get(llvm::Type::Int8Ty, 0), 3353eae03e7d165f20a863a9a4d7122ba2a691ab16dChris Lattner llvm::ConstantInt::get(llvm::Type::Int64Ty, Size/8), 3363eae03e7d165f20a863a9a4d7122ba2a691ab16dChris Lattner llvm::ConstantInt::get(llvm::Type::Int32Ty, 0)); 337f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 338f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 339305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 340f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 341be20bb558cae5352898e6a913e29d24d20134841Chris Lattner if (E->hadDesignators()) { 342be20bb558cae5352898e6a913e29d24d20134841Chris Lattner CGF.ErrorUnsupported(E, "initializer list with designators"); 343be20bb558cae5352898e6a913e29d24d20134841Chris Lattner return; 344be20bb558cae5352898e6a913e29d24d20134841Chris Lattner } 345be20bb558cae5352898e6a913e29d24d20134841Chris Lattner 346be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // FIXME: For constant expressions, call into const expr emitter so 347be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // that we can emit a memcpy instead of storing the individual 348be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // members. This is purely for perf; both codepaths lead to 349be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // equivalent (although not necessarily identical) code. It's worth 350be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // noting that LLVM keeps on getting smarter, though, so it might 351be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // not be worth bothering. 352f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 353f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 354f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 355f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::PointerType *APType = 356f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::PointerType>(DestPtr->getType()); 357f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::ArrayType *AType = 358f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::ArrayType>(APType->getElementType()); 359f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 360f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumInitElements = E->getNumInits(); 361922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 3629619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (E->getNumInits() > 0) { 3639619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T1 = E->getType(); 3649619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T2 = E->getInit(0)->getType(); 3659619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (CGF.getContext().getCanonicalType(T1).getUnqualifiedType() == 3669619662a1d42e2008b865d3459c0677e149dad1bChris Lattner CGF.getContext().getCanonicalType(T2).getUnqualifiedType()) { 3679619662a1d42e2008b865d3459c0677e149dad1bChris Lattner EmitAggLoadOfLValue(E->getInit(0)); 3689619662a1d42e2008b865d3459c0677e149dad1bChris Lattner return; 3699619662a1d42e2008b865d3459c0677e149dad1bChris Lattner } 370922696f03ec9637449e2cba260493808b4977cd3Eli Friedman } 371922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 372f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumArrayElements = AType->getNumElements(); 373c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType ElementType = CGF.getContext().getCanonicalType(E->getType()); 374c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner ElementType =CGF.getContext().getAsArrayType(ElementType)->getElementType(); 375f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 376c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner unsigned CVRqualifier = ElementType.getCVRQualifiers(); 3771e692ace08959399794363e77499b73da5494af9Eli Friedman 378f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (uint64_t i = 0; i != NumArrayElements; ++i) { 379f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 380f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (i < NumInitElements) 3811e692ace08959399794363e77499b73da5494af9Eli Friedman EmitInitializationToLValue(E->getInit(i), 3821e692ace08959399794363e77499b73da5494af9Eli Friedman LValue::MakeAddr(NextVal, CVRqualifier)); 383f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner else 3841e692ace08959399794363e77499b73da5494af9Eli Friedman EmitNullInitializationToLValue(LValue::MakeAddr(NextVal, CVRqualifier), 385f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner ElementType); 386f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 387305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 388f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 389f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 390f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 391f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 392f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 393f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 394f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 395f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 396f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 397f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner RecordDecl *SD = E->getType()->getAsRecordType()->getDecl(); 398f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumMembers = SD->getNumMembers() - SD->hasFlexibleArrayMember(); 399f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned CurInitVal = 0; 400f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner bool isUnion = E->getType()->isUnionType(); 401f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 402f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 403f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 404f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (unsigned CurFieldNo = 0; CurFieldNo != NumMembers; ++CurFieldNo) { 405f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner FieldDecl *CurField = SD->getMember(CurFieldNo); 406f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurField->getIdentifier() == 0) { 407f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Initializers can't initialize unnamed fields, e.g. "int : 20;" 408f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 409f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 4101e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 4111e692ace08959399794363e77499b73da5494af9Eli Friedman LValue FieldLoc = CGF.EmitLValueForField(DestPtr, CurField, isUnion,0); 412f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurInitVal < NumInitElements) { 413f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Store the initializer into the field 414f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // This will probably have to get a bit smarter when we support 415f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // designators in initializers 416f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner EmitInitializationToLValue(E->getInit(CurInitVal++), FieldLoc); 417f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 418f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 419f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner EmitNullInitializationToLValue(FieldLoc, CurField->getType()); 420f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 421f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 422f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Unions only initialize one field. 423f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // (things can get weird with designators, but they aren't 424f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // supported yet.) 425f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isUnionType()) 426f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner break; 427145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 428636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 429636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 430ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 431ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 432ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 433ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 434ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner/// EmitAggExpr - Emit the computation of the specified expression of 435ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner/// aggregate type. The result is computed into DestPtr. Note that if 436ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner/// DestPtr is null, the value of the aggregate expression is not needed. 437ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattnervoid CodeGenFunction::EmitAggExpr(const Expr *E, llvm::Value *DestPtr, 438ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner bool VolatileDest) { 439ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 440ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 441ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 442ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner AggExprEmitter(*this, DestPtr, VolatileDest).Visit(const_cast<Expr*>(E)); 443ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 4447482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4457482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateClear(llvm::Value *DestPtr, QualType Ty) { 4467482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 4477482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4487482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar EmitMemSetToZero(DestPtr, Ty); 4497482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 4507482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4517482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 4527482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar llvm::Value *SrcPtr, QualType Ty) { 4537482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 4547482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4557482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Aggregate assignment turns into llvm.memmove. 4567482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar const llvm::Type *BP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 4577482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (DestPtr->getType() != BP) 4587482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp"); 4597482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (SrcPtr->getType() != BP) 4607482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar SrcPtr = Builder.CreateBitCast(SrcPtr, BP, "tmp"); 4617482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4627482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Get size and alignment info for this aggregate. 4637482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar std::pair<uint64_t, unsigned> TypeInfo = getContext().getTypeInfo(Ty); 4647482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4657482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // FIXME: Handle variable sized types. 4667482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar const llvm::Type *IntPtr = llvm::IntegerType::get(LLVMPointerWidth); 4677482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4687482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar Builder.CreateCall4(CGM.getMemMoveFn(), 4697482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr, SrcPtr, 4707482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // TypeInfo.first describes size in bits. 4717482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar llvm::ConstantInt::get(IntPtr, TypeInfo.first/8), 4727482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar llvm::ConstantInt::get(llvm::Type::Int32Ty, 4737482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar TypeInfo.second/8)); 4747482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 475