CGExprAgg.cpp revision 7e91627301b05cd8f2324795e19d87a62f444c31
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: 777e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes void VisitCStyleCastExpr(CStyleCastExpr *E); 78e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson void VisitImplicitCastExpr(ImplicitCastExpr *E); 79148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson void VisitCallExpr(const CallExpr *E); 80b2d963f527674275c9109252474948368b6e6161Chris Lattner void VisitStmtExpr(const StmtExpr *E); 819c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitBinaryOperator(const BinaryOperator *BO); 8203d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattner void VisitBinAssign(const BinaryOperator *E); 83796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman void VisitOverloadExpr(const OverloadExpr *E); 8407fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman void VisitBinComma(const BinaryOperator *E); 859c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 868fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner void VisitObjCMessageExpr(ObjCMessageExpr *E); 870a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar void VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { 880a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar EmitAggLoadOfLValue(E); 890a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar } 909c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar void VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E); 915daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian void VisitObjCKVCRefExpr(ObjCKVCRefExpr *E); 929c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 939c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitConditionalOperator(const ConditionalOperator *CO); 94636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel void VisitInitListExpr(InitListExpr *E); 9504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { 9604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Visit(DAE->getExpr()); 9704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner } 98b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman void VisitVAArgExpr(VAArgExpr *E); 99f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 100f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitInitializationToLValue(Expr *E, LValue Address); 101f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitNullInitializationToLValue(LValue Address, QualType T); 1029c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // case Expr::ChooseExprClass: 103305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 1049c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner}; 1059c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner} // end anonymous namespace. 1069c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 107ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 108ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Utilities 109ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 1109c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 111883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// EmitAggLoadOfLValue - Given an expression with aggregate type that 112883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// represents a value lvalue, this method emits the address of the lvalue, 113883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// then loads the result into DestPtr. 1149c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::EmitAggLoadOfLValue(const Expr *E) { 1159c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LV = CGF.EmitLValue(E); 116883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(LV.isSimple() && "Can't have aggregate bitfield, vector, etc"); 117883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner llvm::Value *SrcPtr = LV.getAddress(); 118883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 119883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // If the result is ignored, don't copy from the value. 120883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner if (DestPtr == 0) 121883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // FIXME: If the source is volatile, we must read from it. 122883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner return; 123883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 1247482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, SrcPtr, E->getType()); 125883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 126883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 127ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 128ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Visitor Methods 129ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 130ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 1317e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopesvoid AggExprEmitter::VisitCStyleCastExpr(CStyleCastExpr *E) { 1327e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes // GCC union extension 1337e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes if (E->getType()->isUnionType()) { 1347e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes RecordDecl *SD = E->getType()->getAsRecordType()->getDecl(); 1357e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes LValue FieldLoc = CGF.EmitLValueForField(DestPtr, *SD->field_begin(), true, 0); 1367e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes EmitInitializationToLValue(E->getSubExpr(), FieldLoc); 1377e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes return; 1387e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes } 1397e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes 1407e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes Visit(E->getSubExpr()); 1417e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes} 1427e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes 1439619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitImplicitCastExpr(ImplicitCastExpr *E) { 144ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman assert(CGF.getContext().typesAreCompatible( 1459619662a1d42e2008b865d3459c0677e149dad1bChris Lattner E->getSubExpr()->getType().getUnqualifiedType(), 1469619662a1d42e2008b865d3459c0677e149dad1bChris Lattner E->getType().getUnqualifiedType()) && 1479619662a1d42e2008b865d3459c0677e149dad1bChris Lattner "Implicit cast types must be compatible"); 148e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson Visit(E->getSubExpr()); 149e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson} 150e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson 1519619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitCallExpr(const CallExpr *E) { 152148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson RValue RV = CGF.EmitCallExpr(E); 153148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson assert(RV.isAggregate() && "Return value must be aggregate value!"); 154148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 155148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson // If the result is ignored, don't copy from the value. 156148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson if (DestPtr == 0) 157796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman // FIXME: If the source is volatile, we must read from it. 158796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman return; 159796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 1607482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 161796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 1629619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 1639619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 1648f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar RValue RV = CGF.EmitObjCMessageExpr(E); 1658f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar assert(RV.isAggregate() && "Return value must be aggregate value!"); 1668fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 1678fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // If the result is ignored, don't copy from the value. 1688fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner if (DestPtr == 0) 1698f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar // FIXME: If the source is volatile, we must read from it. 1708fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner return; 1718fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 1727482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 1738fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 174796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 1759c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbarvoid AggExprEmitter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 1769c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar RValue RV = CGF.EmitObjCPropertyGet(E); 1779c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar assert(RV.isAggregate() && "Return value must be aggregate value!"); 1785daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 1795daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian // If the result is ignored, don't copy from the value. 1805daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian if (DestPtr == 0) 1815daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian // FIXME: If the source is volatile, we must read from it. 1825daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian return; 1835daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 1845daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 1855daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian} 1865daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 1875daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanianvoid AggExprEmitter::VisitObjCKVCRefExpr(ObjCKVCRefExpr *E) { 1885daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian RValue RV = CGF.EmitObjCPropertyGet(E); 1895daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian assert(RV.isAggregate() && "Return value must be aggregate value!"); 1909c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar 1919c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar // If the result is ignored, don't copy from the value. 1929c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar if (DestPtr == 0) 1939c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar // FIXME: If the source is volatile, we must read from it. 1949c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar return; 1959c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar 1967482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 1979c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar} 1989c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar 1999619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitOverloadExpr(const OverloadExpr *E) { 200796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman RValue RV = CGF.EmitCallExpr(E->getFn(), E->arg_begin(), 2015549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek E->arg_end(CGF.getContext())); 2025549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek 203796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman assert(RV.isAggregate() && "Return value must be aggregate value!"); 204796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 205796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman // If the result is ignored, don't copy from the value. 206796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman if (DestPtr == 0) 207148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson // FIXME: If the source is volatile, we must read from it. 208148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson return; 209148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 2107482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType()); 211148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson} 212148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 2139619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 21407fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman CGF.EmitAnyExpr(E->getLHS()); 21507fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman CGF.EmitAggExpr(E->getRHS(), DestPtr, false); 21607fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 21707fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 218b2d963f527674275c9109252474948368b6e6161Chris Lattnervoid AggExprEmitter::VisitStmtExpr(const StmtExpr *E) { 219b2d963f527674275c9109252474948368b6e6161Chris Lattner CGF.EmitCompoundStmt(*E->getSubStmt(), true, DestPtr, VolatileDest); 220b2d963f527674275c9109252474948368b6e6161Chris Lattner} 221b2d963f527674275c9109252474948368b6e6161Chris Lattner 2229c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) { 223488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(E, "aggregate binary expression"); 224ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 225ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 22603d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattnervoid AggExprEmitter::VisitBinAssign(const BinaryOperator *E) { 227ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // For an assignment to work, the value on the right has 228ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // to be compatible with the value on the left. 229ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman assert(CGF.getContext().typesAreCompatible( 230ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman E->getLHS()->getType().getUnqualifiedType(), 231ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman E->getRHS()->getType().getUnqualifiedType()) 232ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman && "Invalid assignment"); 2339c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LHS = CGF.EmitLValue(E->getLHS()); 234883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2357f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // We have to special case property setters, otherwise we must have 2367f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // a simple lvalue (no aggregates inside vectors, bitfields). 2377f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (LHS.isPropertyRef()) { 2387f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // FIXME: Volatility? 2397f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar llvm::Value *AggLoc = DestPtr; 2407f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (!AggLoc) 2417f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 2427f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar CGF.EmitAggExpr(E->getRHS(), AggLoc, false); 2437f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), 2447f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar RValue::getAggregate(AggLoc)); 24543f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian } 24643f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian else if (LHS.isKVCRef()) { 24743f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian // FIXME: Volatility? 24843f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian llvm::Value *AggLoc = DestPtr; 24943f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian if (!AggLoc) 25043f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 25143f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian CGF.EmitAggExpr(E->getRHS(), AggLoc, false); 25243f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), 25343f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian RValue::getAggregate(AggLoc)); 2547f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } else { 2557f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // Codegen the RHS so that it stores directly into the LHS. 2567f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar CGF.EmitAggExpr(E->getRHS(), LHS.getAddress(), false /*FIXME: VOLATILE LHS*/); 2577f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar 2587f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (DestPtr == 0) 2597f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar return; 2607f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar 2617f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // If the result of the assignment is used, copy the RHS there also. 2627482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateCopy(DestPtr, LHS.getAddress(), E->getType()); 2637f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } 264883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 265883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2669c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) { 2679615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 2689615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 2699615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 270883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2719c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner llvm::Value *Cond = CGF.EvaluateExprAsBool(E->getCond()); 272bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner Builder.CreateCondBr(Cond, LHSBlock, RHSBlock); 273883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2749c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(LHSBlock); 275883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 276883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // Handle the GNU extension for missing LHS. 277883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(E->getLHS() && "Must have LHS for aggregate value"); 278883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 279c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getLHS()); 280d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 281883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2829c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(RHSBlock); 283883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 284c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getRHS()); 285d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 286883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2879c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 288883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 289ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 290b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 291b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman llvm::Value *ArgValue = CGF.EmitLValue(VE->getSubExpr()).getAddress(); 292ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 293ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 2940262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl if (!ArgPtr) { 295ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.ErrorUnsupported(VE, "aggregate va_arg expression"); 2960262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl return; 2970262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl } 2980262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl 299b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman if (DestPtr) 3001e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 301ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.EmitAggregateCopy(DestPtr, ArgPtr, VE->getType()); 302b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 303b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 30413e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venanciovoid AggExprEmitter::EmitNonConstInit(InitListExpr *E) { 305be20bb558cae5352898e6a913e29d24d20134841Chris Lattner if (E->hadDesignators()) { 306be20bb558cae5352898e6a913e29d24d20134841Chris Lattner CGF.ErrorUnsupported(E, "initializer list with designators"); 307be20bb558cae5352898e6a913e29d24d20134841Chris Lattner return; 308be20bb558cae5352898e6a913e29d24d20134841Chris Lattner } 309be20bb558cae5352898e6a913e29d24d20134841Chris Lattner 31013e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio const llvm::PointerType *APType = 31113e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio cast<llvm::PointerType>(DestPtr->getType()); 31213e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio const llvm::Type *DestType = APType->getElementType(); 313305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 31413e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio if (const llvm::ArrayType *AType = dyn_cast<llvm::ArrayType>(DestType)) { 31513e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio unsigned NumInitElements = E->getNumInits(); 316305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 317305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio unsigned i; 318305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio for (i = 0; i != NumInitElements; ++i) { 31936b6a0a63e87803a85080c639ad8b61e8bb5f9eeChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 32013e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio Expr *Init = E->getInit(i); 32113e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio if (isa<InitListExpr>(Init)) 32213e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio CGF.EmitAggExpr(Init, NextVal, VolatileDest); 32313e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio else 3241e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 32513e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio Builder.CreateStore(CGF.EmitScalarExpr(Init), NextVal); 326305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio } 327636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 328305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio // Emit remaining default initializers 329305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio unsigned NumArrayElements = AType->getNumElements(); 33013e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio QualType QType = E->getInit(0)->getType(); 33113e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio const llvm::Type *EType = AType->getElementType(); 332305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio for (/*Do not initialize i*/; i < NumArrayElements; ++i) { 33336b6a0a63e87803a85080c639ad8b61e8bb5f9eeChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 334d79a726dc3c8af61b486948c97a183c7fe5b0179Dan Gohman if (EType->isSingleValueType()) 3351e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 33613e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio Builder.CreateStore(llvm::Constant::getNullValue(EType), NextVal); 33713e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio else 3387482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar CGF.EmitAggregateClear(NextVal, QType); 339305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio } 34013e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio } else 34113e22cf1ee6ecb554e329c16edfb5bcbfaee6050Lauro Ramos Venancio assert(false && "Invalid initializer"); 342305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio} 343636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 344f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV) { 345f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 346f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isComplexType()) { 347f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 348c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else if (CGF.hasAggregateLLVMType(E->getType())) { 349c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitAnyExpr(E, LV.getAddress(), false); 350c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 351c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, E->getType()); 352f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 353f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 354305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 355f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitNullInitializationToLValue(LValue LV, QualType T) { 356f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (!CGF.hasAggregateLLVMType(T)) { 357f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // For non-aggregates, we can store zero 35882397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar llvm::Value *Null = llvm::Constant::getNullValue(CGF.ConvertType(T)); 35982397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Null), LV, T); 360f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 361f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Otherwise, just memset the whole thing to zero. This is legal 362f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // because in LLVM, all default initializers are guaranteed to have a 363f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // bit pattern of all zeros. 364f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 365f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 366f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 3674e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner const llvm::Type *SizeTy = llvm::Type::Int64Ty; 3684e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner llvm::Value *MemSet = CGF.CGM.getIntrinsic(llvm::Intrinsic::memset, 3694e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner &SizeTy, 1); 370f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t Size = CGF.getContext().getTypeSize(T); 371f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 372f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::Type *BP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 373f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value* DestPtr = Builder.CreateBitCast(LV.getAddress(), BP, "tmp"); 3743eae03e7d165f20a863a9a4d7122ba2a691ab16dChris Lattner Builder.CreateCall4(MemSet, DestPtr, 3753eae03e7d165f20a863a9a4d7122ba2a691ab16dChris Lattner llvm::ConstantInt::get(llvm::Type::Int8Ty, 0), 3764e8a9e8640a6717120394ee2ee5f27989757754dChris Lattner llvm::ConstantInt::get(SizeTy, Size/8), 3773eae03e7d165f20a863a9a4d7122ba2a691ab16dChris Lattner llvm::ConstantInt::get(llvm::Type::Int32Ty, 0)); 378f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 379f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 380305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 381f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 382be20bb558cae5352898e6a913e29d24d20134841Chris Lattner if (E->hadDesignators()) { 383be20bb558cae5352898e6a913e29d24d20134841Chris Lattner CGF.ErrorUnsupported(E, "initializer list with designators"); 384be20bb558cae5352898e6a913e29d24d20134841Chris Lattner return; 385be20bb558cae5352898e6a913e29d24d20134841Chris Lattner } 386994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman 387a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#if 0 388a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // FIXME: Disabled while we figure out what to do about 389a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // test/CodeGen/bitfield.c 390a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // 391994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman // If we can, prefer a copy from a global; this is a lot less 392994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman // code for long globals, and it's easier for the current optimizers 393994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman // to analyze. 394994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman // FIXME: Should we really be doing this? Should we try to avoid 395994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman // cases where we emit a global with a lot of zeros? Should 396994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman // we try to avoid short globals? 397994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman if (E->isConstantExpr(CGF.getContext(), 0)) { 398994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::Constant* C = CGF.CGM.EmitConstantExpr(E, &CGF); 399994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalVariable* GV = 400994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman new llvm::GlobalVariable(C->getType(), true, 401994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalValue::InternalLinkage, 402994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman C, "", &CGF.CGM.getModule(), 0); 403994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman CGF.EmitAggregateCopy(DestPtr, GV, E->getType()); 404994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman return; 405994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman } 406a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#endif 407f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 408f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 409f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::PointerType *APType = 410f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::PointerType>(DestPtr->getType()); 411f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::ArrayType *AType = 412f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::ArrayType>(APType->getElementType()); 413f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 414f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumInitElements = E->getNumInits(); 415922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 4169619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (E->getNumInits() > 0) { 4179619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T1 = E->getType(); 4189619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T2 = E->getInit(0)->getType(); 4199619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (CGF.getContext().getCanonicalType(T1).getUnqualifiedType() == 4209619662a1d42e2008b865d3459c0677e149dad1bChris Lattner CGF.getContext().getCanonicalType(T2).getUnqualifiedType()) { 4219619662a1d42e2008b865d3459c0677e149dad1bChris Lattner EmitAggLoadOfLValue(E->getInit(0)); 4229619662a1d42e2008b865d3459c0677e149dad1bChris Lattner return; 4239619662a1d42e2008b865d3459c0677e149dad1bChris Lattner } 424922696f03ec9637449e2cba260493808b4977cd3Eli Friedman } 425922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 426f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumArrayElements = AType->getNumElements(); 427c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType ElementType = CGF.getContext().getCanonicalType(E->getType()); 428c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner ElementType =CGF.getContext().getAsArrayType(ElementType)->getElementType(); 429f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 430c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner unsigned CVRqualifier = ElementType.getCVRQualifiers(); 4311e692ace08959399794363e77499b73da5494af9Eli Friedman 432f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (uint64_t i = 0; i != NumArrayElements; ++i) { 433f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 434f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (i < NumInitElements) 4351e692ace08959399794363e77499b73da5494af9Eli Friedman EmitInitializationToLValue(E->getInit(i), 4361e692ace08959399794363e77499b73da5494af9Eli Friedman LValue::MakeAddr(NextVal, CVRqualifier)); 437f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner else 4381e692ace08959399794363e77499b73da5494af9Eli Friedman EmitNullInitializationToLValue(LValue::MakeAddr(NextVal, CVRqualifier), 439f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner ElementType); 440f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 441305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 442f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 443f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 444f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 445f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 446f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 447f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 448f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 449f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 450f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 451f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner RecordDecl *SD = E->getType()->getAsRecordType()->getDecl(); 452f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned CurInitVal = 0; 453f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner bool isUnion = E->getType()->isUnionType(); 454f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 455f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 456f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 45744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor for (RecordDecl::field_iterator Field = SD->field_begin(), 45844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldEnd = SD->field_end(); 45944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; ++Field) { 46044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // We're done once we hit the flexible array member 46144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (Field->getType()->isIncompleteArrayType()) 46244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor break; 46344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 46444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (Field->getIdentifier() == 0) { 465f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Initializers can't initialize unnamed fields, e.g. "int : 20;" 466f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 467f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 4681e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 46944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor LValue FieldLoc = CGF.EmitLValueForField(DestPtr, *Field, isUnion,0); 470f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurInitVal < NumInitElements) { 471f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Store the initializer into the field 472f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // This will probably have to get a bit smarter when we support 473f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // designators in initializers 474f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner EmitInitializationToLValue(E->getInit(CurInitVal++), FieldLoc); 475f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 476f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 47744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 478f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 479f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 480f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Unions only initialize one field. 481f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // (things can get weird with designators, but they aren't 482f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // supported yet.) 4837e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes if (isUnion) 484f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner break; 485145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 486636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 487636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 488ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 489ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 490ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 491ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 492ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner/// EmitAggExpr - Emit the computation of the specified expression of 493ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner/// aggregate type. The result is computed into DestPtr. Note that if 494ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner/// DestPtr is null, the value of the aggregate expression is not needed. 495ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattnervoid CodeGenFunction::EmitAggExpr(const Expr *E, llvm::Value *DestPtr, 496ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner bool VolatileDest) { 497ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 498ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 499ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 500ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner AggExprEmitter(*this, DestPtr, VolatileDest).Visit(const_cast<Expr*>(E)); 501ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 5027482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5037482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateClear(llvm::Value *DestPtr, QualType Ty) { 5047482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 5057482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5067482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar EmitMemSetToZero(DestPtr, Ty); 5077482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 5087482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5097482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 5107482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar llvm::Value *SrcPtr, QualType Ty) { 5117482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 5127482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5137482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Aggregate assignment turns into llvm.memmove. 5147482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar const llvm::Type *BP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty); 5157482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (DestPtr->getType() != BP) 5167482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp"); 5177482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (SrcPtr->getType() != BP) 5187482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar SrcPtr = Builder.CreateBitCast(SrcPtr, BP, "tmp"); 5197482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5207482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Get size and alignment info for this aggregate. 5217482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar std::pair<uint64_t, unsigned> TypeInfo = getContext().getTypeInfo(Ty); 5227482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5237482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // FIXME: Handle variable sized types. 5247482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar const llvm::Type *IntPtr = llvm::IntegerType::get(LLVMPointerWidth); 5257482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5267482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar Builder.CreateCall4(CGM.getMemMoveFn(), 5277482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr, SrcPtr, 5287482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // TypeInfo.first describes size in bits. 5297482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar llvm::ConstantInt::get(IntPtr, TypeInfo.first/8), 5307482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar llvm::ConstantInt::get(llvm::Type::Int32Ty, 5317482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar TypeInfo.second/8)); 5327482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 533