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Preserve SourceValue information when lowering produces multiple loads from

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different offsets within the same stack slot.

llvm-svn: 61093
This commit is contained in:
Dan Gohman 2008-12-16 18:25:36 +00:00
parent 96d87db03b
commit f8f5625748
1 changed files with 6 additions and 3 deletions
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9
lib/CodeGen/SelectionDAG/LegalizeTypesGeneric.cpp
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@ -19,6 +19,7 @@
#include "LegalizeTypes.h"
#include "llvm/Target/TargetData.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
@ -83,12 +84,14 @@ void DAGTypeLegalizer::ExpandRes_BIT_CONVERT(SDNode *N, SDValue &Lo,
unsigned Alignment =
TLI.getTargetData()->getPrefTypeAlignment(NOutVT.getTypeForMVT());
SDValue StackPtr = DAG.CreateStackTemporary(InVT, Alignment);
int SPFI = cast<FrameIndexSDNode>(StackPtr.getNode())->getIndex();
const Value *SV = PseudoSourceValue::getFixedStack(SPFI);
// Emit a store to the stack slot.
SDValue Store = DAG.getStore(DAG.getEntryNode(), InOp, StackPtr, NULL, 0);
SDValue Store = DAG.getStore(DAG.getEntryNode(), InOp, StackPtr, SV, 0);
// Load the first half from the stack slot.
Lo = DAG.getLoad(NOutVT, Store, StackPtr, NULL, 0);
Lo = DAG.getLoad(NOutVT, Store, StackPtr, SV, 0);
// Increment the pointer to the other half.
unsigned IncrementSize = NOutVT.getSizeInBits() / 8;
@ -96,7 +99,7 @@ void DAGTypeLegalizer::ExpandRes_BIT_CONVERT(SDNode *N, SDValue &Lo,
DAG.getIntPtrConstant(IncrementSize));
// Load the second half from the stack slot.
Hi = DAG.getLoad(NOutVT, Store, StackPtr, NULL, 0, false,
Hi = DAG.getLoad(NOutVT, Store, StackPtr, SV, IncrementSize, false,
MinAlign(Alignment, IncrementSize));
// Handle endianness of the load.