[llvm-commits] CVS: llvm/lib/Target/Alpha/AlphaISelPattern.cpp

[Andrew Lenharth]

Changes in directory llvm/lib/Target/Alpha:

AlphaISelPattern.cpp updated: 1.124 -> 1.125
---
Log message:

more complete Lowering for vacopy and vaarg

---
Diffs of the changes:  (+29 -1)

 AlphaISelPattern.cpp |   30 +++++++++++++++++++++++++++++-
 1 files changed, 29 insertions(+), 1 deletion(-)


Index: llvm/lib/Target/Alpha/AlphaISelPattern.cpp
diff -u llvm/lib/Target/Alpha/AlphaISelPattern.cpp:1.124 llvm/lib/Target/Alpha/AlphaISelPattern.cpp:1.125
--- llvm/lib/Target/Alpha/AlphaISelPattern.cpp:1.124	Wed Jun 22 12:19:45 2005
+++ llvm/lib/Target/Alpha/AlphaISelPattern.cpp	Wed Jun 22 18:04:28 2005
@@ -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,