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//===--- CGCXXTemp.cpp - Emit LLVM Code for C++ temporaries ---------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This contains code dealing with C++ code generation of temporaries
//
//===----------------------------------------------------------------------===//
#include "CodeGenFunction.h"
using namespace clang;
using namespace CodeGen;
void CodeGenFunction::PushCXXTemporary(const CXXTemporary *Temporary,
llvm::Value *Ptr) {
llvm::BasicBlock *DtorBlock = createBasicBlock("temp.dtor");
LiveTemporaries.push_back(CXXLiveTemporaryInfo(Temporary, Ptr, DtorBlock, 0));
}
void CodeGenFunction::PopCXXTemporary() {
const CXXLiveTemporaryInfo& Info = LiveTemporaries.back();
CleanupBlockInfo CleanupInfo = PopCleanupBlock();
assert(CleanupInfo.CleanupBlock == Info.DtorBlock &&
"Cleanup block mismatch!");
assert(!CleanupInfo.SwitchBlock &&
"Should not have a switch block for temporary cleanup!");
assert(!CleanupInfo.EndBlock &&
"Should not have an end block for temporary cleanup!");
EmitBlock(Info.DtorBlock);
EmitCXXDestructorCall(Info.Temporary->getDestructor(),
Dtor_Complete, Info.ThisPtr);
LiveTemporaries.pop_back();
}
RValue
CodeGenFunction::EmitCXXExprWithTemporaries(const CXXExprWithTemporaries *E,
llvm::Value *AggLoc,
bool isAggLocVolatile) {
// Keep track of the current cleanup stack depth.
size_t CleanupStackDepth = CleanupEntries.size();
unsigned OldNumLiveTemporaries = LiveTemporaries.size();
RValue RV = EmitAnyExpr(E->getSubExpr(), AggLoc, isAggLocVolatile);
// Go through the temporaries backwards.
for (unsigned i = E->getNumTemporaries(); i != 0; --i) {
assert(LiveTemporaries.back().Temporary == E->getTemporary(i - 1));
LiveTemporaries.pop_back();
}
assert(OldNumLiveTemporaries == LiveTemporaries.size() &&
"Live temporary stack mismatch!");
EmitCleanupBlocks(CleanupStackDepth);
return RV;
}
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