more complete Lowering for vacopy and vaarg
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22274 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index 537f15c..f2ed986 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -159,6 +159,10 @@
LowerVAArgNext(SDOperand Chain, SDOperand VAList,
const Type *ArgTy, SelectionDAG &DAG);
+ std::pair<SDOperand,SDOperand>
+ LowerVACopy(SDOperand Chain, SDOperand Src, SDOperand Dest,
+ SelectionDAG &DAG);
+
virtual std::pair<SDOperand, SDOperand>
LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, unsigned Depth,
SelectionDAG &DAG);
@@ -418,7 +422,17 @@
DAG.getConstant(8, MVT::i64));
SDOperand Offset = DAG.getLoad(MVT::i64, Chain, Tmp, DAG.getSrcValue(NULL));
SDOperand DataPtr = DAG.getNode(ISD::ADD, MVT::i64, Base, Offset);
- SDOperand Result = DAG.getLoad(MVT::i64, Chain, DataPtr,
+ if (ArgTy->isFloatingPoint())
+ {
+ //if fp && Offset < 6*8, then subtract 6*8 from DataPtr
+ SDOperand FPDataPtr = DAG.getNode(ISD::SUB, MVT::i64, DataPtr,
+ DAG.getConstant(8*6, MVT::i64));
+ SDOperand CC = DAG.getSetCC(ISD::SETLT, MVT::i64,
+ Offset, DAG.getConstant(8*6, MVT::i64));
+ DataPtr = DAG.getNode(ISD::SELECT, MVT::i64, CC, FPDataPtr, DataPtr);
+ }
+
+ SDOperand Result = DAG.getLoad(getValueType(ArgTy), Chain, DataPtr,
DAG.getSrcValue(NULL));
SDOperand NewOffset = DAG.getNode(ISD::ADD, MVT::i64, Offset,
DAG.getConstant(8, MVT::i64));
@@ -427,6 +441,20 @@
return std::make_pair(Result, Update);
}
+std::pair<SDOperand,SDOperand> AlphaTargetLowering::
+LowerVACopy(SDOperand Chain, SDOperand Src, SDOperand Dest,
+ SelectionDAG &DAG) {
+ //Default to returning the input list
+ SDOperand Val = DAG.getLoad(getPointerTy(), Chain, Src, DAG.getSrcValue(NULL));
+ SDOperand Result = DAG.getNode(ISD::STORE, MVT::Other, Val.getValue(1),
+ Val, Dest, DAG.getSrcValue(NULL));
+ SDOperand NP = DAG.getNode(ISD::ADD, MVT::i64, Src,
+ DAG.getConstant(8, MVT::i64));
+ Val = DAG.getLoad(MVT::i32, Chain, NP, DAG.getSrcValue(NULL));
+ Result = DAG.getNode(ISD::STORE, MVT::Other, Val.getValue(1),
+ Val, Dest, DAG.getSrcValue(NULL));
+ return std::make_pair(Result, Result);
+}
std::pair<SDOperand, SDOperand> AlphaTargetLowering::
LowerFrameReturnAddress(bool isFrameAddress, SDOperand Chain, unsigned Depth,