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add a new CreateStackTemporary helper method.

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llvm-svn: 42994
This commit is contained in:
Chris Lattner 2007-10-15 17:47:20 +00:00
parent 2a93fc3ffb
commit 292bebbb6f
2 changed files with 17 additions and 0 deletions
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4
include/llvm/CodeGen/SelectionDAG.h
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@ -492,6 +492,10 @@ public:
void dump() const;
/// CreateStackTemporary - Create a stack temporary, suitable for holding the
/// specified value type.
SDOperand CreateStackTemporary(MVT::ValueType VT);
/// FoldSetCC - Constant fold a setcc to true or false.
SDOperand FoldSetCC(MVT::ValueType VT, SDOperand N1,
SDOperand N2, ISD::CondCode Cond);

13
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -19,6 +19,7 @@
#include "llvm/Assembly/Writer.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Target/TargetData.h"
@ -913,6 +914,18 @@ SDOperand SelectionDAG::getSrcValue(const Value *V, int Offset) {
return SDOperand(N, 0);
}
/// CreateStackTemporary - Create a stack temporary, suitable for holding the
/// specified value type.
SDOperand SelectionDAG::CreateStackTemporary(MVT::ValueType VT) {
MachineFrameInfo *FrameInfo = getMachineFunction().getFrameInfo();
unsigned ByteSize = MVT::getSizeInBits(VT)/8;
const Type *Ty = MVT::getTypeForValueType(VT);
unsigned StackAlign = (unsigned)TLI.getTargetData()->getPrefTypeAlignment(Ty);
int FrameIdx = FrameInfo->CreateStackObject(ByteSize, StackAlign);
return getFrameIndex(FrameIdx, TLI.getPointerTy());
}
SDOperand SelectionDAG::FoldSetCC(MVT::ValueType VT, SDOperand N1,
SDOperand N2, ISD::CondCode Cond) {
// These setcc operations always fold.