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/PowerPC/PPC64ISelPattern.cpp b/lib/Target/PowerPC/PPC64ISelPattern.cpp
index e5c2f40..1e72bf0 100644
--- a/lib/Target/PowerPC/PPC64ISelPattern.cpp
+++ b/lib/Target/PowerPC/PPC64ISelPattern.cpp
@@ -176,7 +176,7 @@
SDOperand FIN = DAG.getFrameIndex(FI, MVT::i64);
FIN = DAG.getNode(ISD::ADD, MVT::i64, FIN,
DAG.getConstant(SubregOffset, MVT::i64));
- argt = newroot = DAG.getLoad(ObjectVT, DAG.getEntryNode(), FIN);
+ argt = newroot = DAG.getLoad(ObjectVT, DAG.getEntryNode(), FIN, DAG.getSrcValue(NULL));
}
// Every 4 bytes of argument space consumes one of the GPRs available for
@@ -204,7 +204,7 @@
BuildMI(&BB, PPC::IMPLICIT_DEF, 0, GPR[GPR_idx]);
SDOperand Val = DAG.getCopyFromReg(GPR[GPR_idx], MVT::i64, DAG.getRoot());
SDOperand Store = DAG.getNode(ISD::STORE, MVT::Other, Val.getValue(1),
- Val, FIN);
+ Val, FIN, DAG.getSrcValue(NULL));
MemOps.push_back(Store);
// Increment the address by eight for the next argument to store
SDOperand PtrOff = DAG.getConstant(8, getPointerTy());
@@ -285,7 +285,7 @@
--GPR_remaining;
} else {
MemOps.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
- Args[i].first, PtrOff));
+ Args[i].first, PtrOff, DAG.getSrcValue(NULL)));
}
ArgOffset += 8;
break;
@@ -296,11 +296,11 @@
--FPR_remaining;
if (isVarArg) {
SDOperand Store = DAG.getNode(ISD::STORE, MVT::Other, Chain,
- Args[i].first, PtrOff);
+ Args[i].first, PtrOff, DAG.getSrcValue(NULL));
MemOps.push_back(Store);
// Float varargs are always shadowed in available integer registers
if (GPR_remaining > 0) {
- SDOperand Load = DAG.getLoad(MVT::i64, Store, PtrOff);
+ SDOperand Load = DAG.getLoad(MVT::i64, Store, PtrOff, DAG.getSrcValue(NULL));
MemOps.push_back(Load);
args_to_use.push_back(Load);
--GPR_remaining;
@@ -315,7 +315,7 @@
}
} else {
MemOps.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
- Args[i].first, PtrOff));
+ Args[i].first, PtrOff, DAG.getSrcValue(NULL)));
}
ArgOffset += 8;
break;
@@ -351,7 +351,7 @@
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 {
Result = DAG.getNode(ISD::ADD, VAList.getValueType(), VAList,
DAG.getConstant(8, VAList.getValueType()));