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Implement Value* tracking for loads and stores in the selection DAG. This enables one to use alias analysis in the backends.

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(TRUNK)Stores and (EXT|ZEXT|SEXT)Loads have an extra SDOperand which is a SrcValueSDNode which contains the Value*.  Note that if the operation is introduced by the backend, it will still have the operand, but the value* will be null.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21599 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Lenharth
2005-04-27 20:10:01 +00:00
parent 22cab6c752
commit 2d86ea21dd
10 changed files with 145 additions and 67 deletions
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10
lib/Target/X86/X86ISelPattern.cpp
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@@ -141,7 +141,7 @@ X86TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
// dead loads.
SDOperand ArgValue;
if (!I->use_empty())
ArgValue = DAG.getLoad(ObjectVT, DAG.getEntryNode(), FIN);
ArgValue = DAG.getLoad(ObjectVT, DAG.getEntryNode(), FIN, DAG.getSrcValue(NULL));
else {
if (MVT::isInteger(ObjectVT))
ArgValue = DAG.getConstant(0, ObjectVT);
@@ -239,13 +239,13 @@ X86TargetLowering::LowerCallTo(SDOperand Chain,
case MVT::i32:
case MVT::f32:
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
Args[i].first, PtrOff));
Args[i].first, PtrOff, DAG.getSrcValue(NULL)));
ArgOffset += 4;
break;
case MVT::i64:
case MVT::f64:
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
Args[i].first, PtrOff));
Args[i].first, PtrOff, DAG.getSrcValue(NULL)));
ArgOffset += 8;
break;
}
@@ -278,7 +278,7 @@ LowerVAArgNext(bool isVANext, SDOperand Chain, SDOperand VAList,
MVT::ValueType ArgVT = getValueType(ArgTy);
SDOperand Result;
if (!isVANext) {
Result = DAG.getLoad(ArgVT, DAG.getEntryNode(), VAList);
Result = DAG.getLoad(ArgVT, DAG.getEntryNode(), VAList, DAG.getSrcValue(NULL));
} else {
unsigned Amt;
if (ArgVT == MVT::i32)
@@ -312,7 +312,7 @@ LowerFrameReturnAddress(bool isFrameAddress, SDOperand Chain, unsigned Depth,
if (!isFrameAddress)
// Just load the return address
Result = DAG.getLoad(MVT::i32, DAG.getEntryNode(), RetAddrFI);
Result = DAG.getLoad(MVT::i32, DAG.getEntryNode(), RetAddrFI, DAG.getSrcValue(NULL));
else
Result = DAG.getNode(ISD::SUB, MVT::i32, RetAddrFI,
DAG.getConstant(4, MVT::i32));