Implement Value* tracking for loads and stores in the selection DAG. This enables one to use alias analysis in the backends.
(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
diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index 450de9f..e2e863d 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -229,7 +229,7 @@
//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 @@
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