CGExprAgg.cpp revision 43f447098d5e6162fbfb97ed38365284207a7fbe
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); 905daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian void VisitObjCKVCRefExpr(ObjCKVCRefExpr *E); 919c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 929c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitConditionalOperator(const ConditionalOperator *CO); 93636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel void VisitInitListExpr(InitListExpr *E); 9404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { 9504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Visit(DAE->getExpr()); 9604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner } 97b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman void VisitVAArgExpr(VAArgExpr *E); 98f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 99f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitInitializationToLValue(Expr *E, LValue Address); 100f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitNullInitializationToLValue(LValue Address, QualType T); 1019c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // case Expr::ChooseExprClass: 102305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 1039c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner}; 1049c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner} // end anonymous namespace. 1059c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 106ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 107ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Utilities 108ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 1099c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 110883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// EmitAggLoadOfLValue - Given an expression with aggregate type that 111883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// represents a value lvalue, this method emits the address of the lvalue, 112883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// then loads the result into DestPtr. 1139c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::EmitAggLoadOfLValue(const Expr *E) { 1149c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LV = CGF.EmitLValue(E); 115883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(LV.isSimple() && "Can't have aggregate bitfield, vector, etc"); 116883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner llvm::Value *SrcPtr = LV.getAddress(); 117883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 118883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // If the result is ignored, don't copy from the value. 119883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner if (DestPtr == 0) 120883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // FIXME: If the source is volatile, we must read from it. 121883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner return; 122883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 1237482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, SrcPtr, E->getType()); 124883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 125883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 126ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 127ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Visitor Methods 128ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 129ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 1309619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitImplicitCastExpr(ImplicitCastExpr *E) { 131ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman assert(CGF.getContext().typesAreCompatible( 1329619662a1d42e2008b865d3459c0677e149dad1bChris Lattner E->getSubExpr()->getType().getUnqualifiedType(), 1339619662a1d42e2008b865d3459c0677e149dad1bChris Lattner E->getType().getUnqualifiedType()) && 1349619662a1d42e2008b865d3459c0677e149dad1bChris Lattner "Implicit cast types must be compatible"); 135e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson Visit(E->getSubExpr()); 136e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson} 137e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson 1389619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitCallExpr(const CallExpr *E) { 139148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson RValue RV = CGF.EmitCallExpr(E); 140148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson assert(RV.isAggregate() && "Return value must be aggregate value!"); 141148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 142148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson // If the result is ignored, don't copy from the value. 143148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson if (DestPtr == 0) 144796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman // FIXME: If the source is volatile, we must read from it. 145796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman return; 146796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 1477482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 148796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 1499619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 1509619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 1518f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar RValue RV = CGF.EmitObjCMessageExpr(E); 1528f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar assert(RV.isAggregate() && "Return value must be aggregate value!"); 1538fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 1548fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // If the result is ignored, don't copy from the value. 1558fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner if (DestPtr == 0) 1568f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar // FIXME: If the source is volatile, we must read from it. 1578fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner return; 1588fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 1597482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 1608fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 161796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 1629c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbarvoid AggExprEmitter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 1639c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar RValue RV = CGF.EmitObjCPropertyGet(E); 1649c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar assert(RV.isAggregate() && "Return value must be aggregate value!"); 1655daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 1665daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian // If the result is ignored, don't copy from the value. 1675daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian if (DestPtr == 0) 1685daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian // FIXME: If the source is volatile, we must read from it. 1695daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian return; 1705daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 1715daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 1725daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian} 1735daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 1745daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanianvoid AggExprEmitter::VisitObjCKVCRefExpr(ObjCKVCRefExpr *E) { 1755daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian RValue RV = CGF.EmitObjCPropertyGet(E); 1765daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian assert(RV.isAggregate() && "Return value must be aggregate value!"); 1779c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar 1789c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar // If the result is ignored, don't copy from the value. 1799c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar if (DestPtr == 0) 1809c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar // FIXME: If the source is volatile, we must read from it. 1819c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar return; 1829c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar 1837482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 1849c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar} 1859c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar 1869619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitOverloadExpr(const OverloadExpr *E) { 187796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman RValue RV = CGF.EmitCallExpr(E->getFn(), E->arg_begin(), 1885549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek E->arg_end(CGF.getContext())); 1895549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek 190796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman assert(RV.isAggregate() && "Return value must be aggregate value!"); 191796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 192796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman // If the result is ignored, don't copy from the value. 193796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman if (DestPtr == 0) 194148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson // FIXME: If the source is volatile, we must read from it. 195148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson return; 196148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 1977482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 198148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson} 199148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 2009619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 20107fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman CGF.EmitAnyExpr(E->getLHS()); 20207fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman CGF.EmitAggExpr(E->getRHS(), DestPtr, false); 20307fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 20407fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 205b2d963f527674275c9109252474948368b6e6161Chris Lattnervoid AggExprEmitter::VisitStmtExpr(const StmtExpr *E) { 206b2d963f527674275c9109252474948368b6e6161Chris Lattner CGF.EmitCompoundStmt(*E->getSubStmt(), true, DestPtr, VolatileDest); 207b2d963f527674275c9109252474948368b6e6161Chris Lattner} 208b2d963f527674275c9109252474948368b6e6161Chris Lattner 2099c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) { 210488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(E, "aggregate binary expression"); 211ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 212ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 21303d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattnervoid AggExprEmitter::VisitBinAssign(const BinaryOperator *E) { 214ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // For an assignment to work, the value on the right has 215ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // to be compatible with the value on the left. 216ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman assert(CGF.getContext().typesAreCompatible( 217ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman E->getLHS()->getType().getUnqualifiedType(), 218ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman E->getRHS()->getType().getUnqualifiedType()) 219ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman && "Invalid assignment"); 2209c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LHS = CGF.EmitLValue(E->getLHS()); 221883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2227f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // We have to special case property setters, otherwise we must have 2237f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // a simple lvalue (no aggregates inside vectors, bitfields). 2247f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (LHS.isPropertyRef()) { 2257f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // FIXME: Volatility? 2267f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar llvm::Value *AggLoc = DestPtr; 2277f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (!AggLoc) 2287f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 2297f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar CGF.EmitAggExpr(E->getRHS(), AggLoc, false); 2307f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), 2317f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar RValue::getAggregate(AggLoc)); 23243f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian } 23343f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian else if (LHS.isKVCRef()) { 23443f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian // FIXME: Volatility? 23543f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian llvm::Value *AggLoc = DestPtr; 23643f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian if (!AggLoc) 23743f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 23843f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian CGF.EmitAggExpr(E->getRHS(), AggLoc, false); 23943f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), 24043f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian RValue::getAggregate(AggLoc)); 2417f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } else { 2427f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // Codegen the RHS so that it stores directly into the LHS. 2437f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar CGF.EmitAggExpr(E->getRHS(), LHS.getAddress(), false /*FIXME: VOLATILE LHS*/); 2447f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar 2457f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (DestPtr == 0) 2467f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar return; 2477f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar 2487f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // If the result of the assignment is used, copy the RHS there also. 2497482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, LHS.getAddress(), E->getType()); 2507f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } 251883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 252883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2539c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) { 2549615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 2559615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 2569615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 257883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2589c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner llvm::Value *Cond = CGF.EvaluateExprAsBool(E->getCond()); 259bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner Builder.CreateCondBr(Cond, LHSBlock, RHSBlock); 260883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2619c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(LHSBlock); 262883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 263883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // Handle the GNU extension for missing LHS. 264883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(E->getLHS() && "Must have LHS for aggregate value"); 265883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 266c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getLHS()); 267d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 268883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2699c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(RHSBlock); 270883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 271c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getRHS()); 272d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 273883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2749c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 275883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 276ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 277b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 278b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman llvm::Value *ArgValue = CGF.EmitLValue(VE->getSubExpr()).getAddress(); 279ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 280ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 281ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson if (!ArgPtr) 282ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.ErrorUnsupported(VE, "aggregate va_arg expression"); 283ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 284b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman if (DestPtr) 2851e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 286ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.EmitAggregateCopy(DestPtr, ArgPtr, VE->getType()); 287b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 288b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 28913e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venanciovoid AggExprEmitter::EmitNonConstInit(InitListExpr *E) { 290be20bb558cae5352898e6a913e29d24d20134841Chris Lattner if (E->hadDesignators()) { 291be20bb558cae5352898e6a913e29d24d20134841Chris Lattner CGF.ErrorUnsupported(E, "initializer list with designators"); 292be20bb558cae5352898e6a913e29d24d20134841Chris Lattner return; 293be20bb558cae5352898e6a913e29d24d20134841Chris Lattner } 294be20bb558cae5352898e6a913e29d24d20134841Chris Lattner 29513e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio const llvm::PointerType *APType = 29613e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio cast<llvm::PointerType>(DestPtr->getType()); 29713e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio const llvm::Type *DestType = APType->getElementType(); 298305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 29913e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio if (const llvm::ArrayType *AType = dyn_cast<llvm::ArrayType>(DestType)) { 30013e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio unsigned NumInitElements = E->getNumInits(); 301305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 302305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio unsigned i; 303305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio for (i = 0; i != NumInitElements; ++i) { 30436b6a0a63e87803a85080c639ad8b61e8bb5f9eeChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 30513e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio Expr *Init = E->getInit(i); 30613e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio if (isa<InitListExpr>(Init)) 30713e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio CGF.EmitAggExpr(Init, NextVal, VolatileDest); 30813e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio else 3091e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 31013e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio Builder.CreateStore(CGF.EmitScalarExpr(Init), NextVal); 311305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio } 312636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 313305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio // Emit remaining default initializers 314305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio unsigned NumArrayElements = AType->getNumElements(); 31513e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio QualType QType = E->getInit(0)->getType(); 31613e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio const llvm::Type *EType = AType->getElementType(); 317305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio for (/*Do not initialize i*/; i < NumArrayElements; ++i) { 31836b6a0a63e87803a85080c639ad8b61e8bb5f9eeChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 319d79a726dc3c8af61b486948c97a183c7fe5b0179Dan Gohman if (EType->isSingleValueType()) 3201e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 32113e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio Builder.CreateStore(llvm::Constant::getNullValue(EType), NextVal); 32213e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio else 3237482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateClear(NextVal, QType); 324305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio } 32513e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio } else 32613e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio assert(false && "Invalid initializer"); 327305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio} 328636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 329f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV) { 330f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 331f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isComplexType()) { 332f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 333c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else if (CGF.hasAggregateLLVMType(E->getType())) { 334c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitAnyExpr(E, LV.getAddress(), false); 335c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 336c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, E->getType()); 337f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 338f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 339305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 340f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitNullInitializationToLValue(LValue LV, QualType T) { 341f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (!CGF.hasAggregateLLVMType(T)) { 342f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // For non-aggregates, we can store zero 34382397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar llvm::Value *Null = llvm::Constant::getNullValue(CGF.ConvertType(T)); 34482397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Null), LV, T); 345f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 346f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Otherwise, just memset the whole thing to zero. This is legal 347f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // because in LLVM, all default initializers are guaranteed to have a 348f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // bit pattern of all zeros. 349f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 350f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 351f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 3524e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *SizeTy = llvm::Type::Int64Ty; 3534e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner llvm::Value *MemSet = CGF.CGM.getIntrinsic(llvm::Intrinsic::memset, 3544e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner &SizeTy, 1); 355f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t Size = CGF.getContext().getTypeSize(T); 356f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 357f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::Type *BP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 358f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value* DestPtr = Builder.CreateBitCast(LV.getAddress(), BP, "tmp"); 3593eae03e7d165f20a863a9a4d7122ba2a691ab16dChris Lattner Builder.CreateCall4(MemSet, DestPtr, 3603eae03e7d165f20a863a9a4d7122ba2a691ab16dChris Lattner llvm::ConstantInt::get(llvm::Type::Int8Ty, 0), 3614e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner llvm::ConstantInt::get(SizeTy, Size/8), 3623eae03e7d165f20a863a9a4d7122ba2a691ab16dChris Lattner llvm::ConstantInt::get(llvm::Type::Int32Ty, 0)); 363f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 364f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 365305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 366f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 367be20bb558cae5352898e6a913e29d24d20134841Chris Lattner if (E->hadDesignators()) { 368be20bb558cae5352898e6a913e29d24d20134841Chris Lattner CGF.ErrorUnsupported(E, "initializer list with designators"); 369be20bb558cae5352898e6a913e29d24d20134841Chris Lattner return; 370be20bb558cae5352898e6a913e29d24d20134841Chris Lattner } 371be20bb558cae5352898e6a913e29d24d20134841Chris Lattner 372be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // FIXME: For constant expressions, call into const expr emitter so 373be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // that we can emit a memcpy instead of storing the individual 374be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // members. This is purely for perf; both codepaths lead to 375be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // equivalent (although not necessarily identical) code. It's worth 376be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // noting that LLVM keeps on getting smarter, though, so it might 377be38d0274d0836f31ddeaee6789433b99a5a0c9cDaniel Dunbar // not be worth bothering. 378f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 379f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 380f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 381f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::PointerType *APType = 382f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::PointerType>(DestPtr->getType()); 383f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::ArrayType *AType = 384f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::ArrayType>(APType->getElementType()); 385f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 386f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumInitElements = E->getNumInits(); 387922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 3889619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (E->getNumInits() > 0) { 3899619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T1 = E->getType(); 3909619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T2 = E->getInit(0)->getType(); 3919619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (CGF.getContext().getCanonicalType(T1).getUnqualifiedType() == 3929619662a1d42e2008b865d3459c0677e149dad1bChris Lattner CGF.getContext().getCanonicalType(T2).getUnqualifiedType()) { 3939619662a1d42e2008b865d3459c0677e149dad1bChris Lattner EmitAggLoadOfLValue(E->getInit(0)); 3949619662a1d42e2008b865d3459c0677e149dad1bChris Lattner return; 3959619662a1d42e2008b865d3459c0677e149dad1bChris Lattner } 396922696f03ec9637449e2cba260493808b4977cd3Eli Friedman } 397922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 398f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumArrayElements = AType->getNumElements(); 399c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType ElementType = CGF.getContext().getCanonicalType(E->getType()); 400c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner ElementType =CGF.getContext().getAsArrayType(ElementType)->getElementType(); 401f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 402c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner unsigned CVRqualifier = ElementType.getCVRQualifiers(); 4031e692ace08959399794363e77499b73da5494af9Eli Friedman 404f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (uint64_t i = 0; i != NumArrayElements; ++i) { 405f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 406f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (i < NumInitElements) 4071e692ace08959399794363e77499b73da5494af9Eli Friedman EmitInitializationToLValue(E->getInit(i), 4081e692ace08959399794363e77499b73da5494af9Eli Friedman LValue::MakeAddr(NextVal, CVRqualifier)); 409f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner else 4101e692ace08959399794363e77499b73da5494af9Eli Friedman EmitNullInitializationToLValue(LValue::MakeAddr(NextVal, CVRqualifier), 411f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner ElementType); 412f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 413305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 414f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 415f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 416f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 417f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 418f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 419f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 420f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 421f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 422f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 423f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner RecordDecl *SD = E->getType()->getAsRecordType()->getDecl(); 424f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumMembers = SD->getNumMembers() - SD->hasFlexibleArrayMember(); 425f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned CurInitVal = 0; 426f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner bool isUnion = E->getType()->isUnionType(); 427f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 428f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 429f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 430f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (unsigned CurFieldNo = 0; CurFieldNo != NumMembers; ++CurFieldNo) { 431f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner FieldDecl *CurField = SD->getMember(CurFieldNo); 432f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurField->getIdentifier() == 0) { 433f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Initializers can't initialize unnamed fields, e.g. "int : 20;" 434f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 435f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 4361e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 4371e692ace08959399794363e77499b73da5494af9Eli Friedman LValue FieldLoc = CGF.EmitLValueForField(DestPtr, CurField, isUnion,0); 438f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurInitVal < NumInitElements) { 439f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Store the initializer into the field 440f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // This will probably have to get a bit smarter when we support 441f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // designators in initializers 442f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner EmitInitializationToLValue(E->getInit(CurInitVal++), FieldLoc); 443f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 444f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 445f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner EmitNullInitializationToLValue(FieldLoc, CurField->getType()); 446f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 447f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 448f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Unions only initialize one field. 449f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // (things can get weird with designators, but they aren't 450f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // supported yet.) 451f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isUnionType()) 452f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner break; 453145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 454636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 455636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 456ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 457ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 458ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 459ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 460ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner/// EmitAggExpr - Emit the computation of the specified expression of 461ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner/// aggregate type. The result is computed into DestPtr. Note that if 462ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner/// DestPtr is null, the value of the aggregate expression is not needed. 463ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattnervoid CodeGenFunction::EmitAggExpr(const Expr *E, llvm::Value *DestPtr, 464ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner bool VolatileDest) { 465ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 466ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 467ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 468ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner AggExprEmitter(*this, DestPtr, VolatileDest).Visit(const_cast<Expr*>(E)); 469ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 4707482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4717482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateClear(llvm::Value *DestPtr, QualType Ty) { 4727482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 4737482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4747482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar EmitMemSetToZero(DestPtr, Ty); 4757482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 4767482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4777482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 4787482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar llvm::Value *SrcPtr, QualType Ty) { 4797482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 4807482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4817482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Aggregate assignment turns into llvm.memmove. 4827482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar const llvm::Type *BP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 4837482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (DestPtr->getType() != BP) 4847482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp"); 4857482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (SrcPtr->getType() != BP) 4867482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar SrcPtr = Builder.CreateBitCast(SrcPtr, BP, "tmp"); 4877482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4887482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Get size and alignment info for this aggregate. 4897482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar std::pair<uint64_t, unsigned> TypeInfo = getContext().getTypeInfo(Ty); 4907482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4917482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // FIXME: Handle variable sized types. 4927482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar const llvm::Type *IntPtr = llvm::IntegerType::get(LLVMPointerWidth); 4937482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 4947482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar Builder.CreateCall4(CGM.getMemMoveFn(), 4957482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr, SrcPtr, 4967482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // TypeInfo.first describes size in bits. 4977482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar llvm::ConstantInt::get(IntPtr, TypeInfo.first/8), 4987482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar llvm::ConstantInt::get(llvm::Type::Int32Ty, 4997482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar TypeInfo.second/8)); 5007482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 501