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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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lib/Target/Alpha/AlphaISelPattern.cpp
+3 -3
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@@ -229,7 +229,7 @@ AlphaTargetLowering::LowerArguments(Function &F, SelectionDAG &DAG)
//from this parameter
SDOperand FIN = DAG.getFrameIndex(FI, MVT::i64);
argt = newroot = DAG.getLoad(getValueType(I->getType()),
DAG.getEntryNode(), FIN);
DAG.getEntryNode(), FIN, DAG.getSrcValue(NULL));
}
++count;
LS.push_back(newroot.getValue(1));
@@ -245,14 +245,14 @@ AlphaTargetLowering::LowerArguments(Function &F, SelectionDAG &DAG)
SDOperand argt = DAG.getCopyFromReg(Vreg, MVT::i64, Chain);
int FI = MFI->CreateFixedObject(8, -8 * (6 - i));
SDOperand SDFI = DAG.getFrameIndex(FI, MVT::i64);
LS.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain, argt, SDFI));
LS.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain, argt, SDFI, DAG.getSrcValue(NULL)));
Vreg = MF.getSSARegMap()->createVirtualRegister(getRegClassFor(MVT::f64));
BuildMI(&BB, Alpha::CPYS, 2, Vreg).addReg(args_float[i]).addReg(args_float[i]);
argt = DAG.getCopyFromReg(Vreg, MVT::f64, Chain);
FI = MFI->CreateFixedObject(8, - 8 * (12 - i));
SDFI = DAG.getFrameIndex(FI, MVT::i64);
LS.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain, argt, SDFI));
LS.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain, argt, SDFI, DAG.getSrcValue(NULL)));
}
// If the function takes variable number of arguments, make a frame index for