Changes in directory llvm/lib/CodeGen/SelectionDAG:
LegalizeDAG.cpp updated: 1.350 -> 1.351
---
Log message:
Implement promotion for EXTRACT_VECTOR_ELT, allowing v16i8 multiplies to work
with PowerPC.
---
Diffs of the changes: (+27 -16)
LegalizeDAG.cpp | 43 +++++++++++++++++++++++++++----------------
1 files changed, 27 insertions(+), 16 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.350
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.351
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.350 Sat Apr 1 21:57:31 2006
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Sat Apr 1 23:06:04 2006
@@ -194,6 +194,7 @@
SDOperand &Lo, SDOperand &Hi);
SDOperand LowerVEXTRACT_VECTOR_ELT(SDOperand Op);
+ SDOperand ExpandEXTRACT_VECTOR_ELT(SDOperand Op);
SDOperand getIntPtrConstant(uint64_t Val) {
return DAG.getConstant(Val, TLI.getPointerTy());
@@ -901,24 +902,10 @@
break;
}
// FALLTHROUGH
- case TargetLowering::Expand: {
- // If the target doesn't support this, store the value to a temporary
- // stack slot, then LOAD the scalar element back out.
- SDOperand StackPtr = CreateStackTemporary(Tmp1.getValueType());
- SDOperand Ch = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
- Tmp1, StackPtr, DAG.getSrcValue(NULL));
-
- // Add the offset to the index.
- unsigned EltSize = MVT::getSizeInBits(Result.getValueType())/8;
- Tmp2 = DAG.getNode(ISD::MUL, Tmp2.getValueType(), Tmp2,
- DAG.getConstant(EltSize, Tmp2.getValueType()));
- StackPtr = DAG.getNode(ISD::ADD, Tmp2.getValueType(), Tmp2, StackPtr);
-
- Result = DAG.getLoad(Result.getValueType(), Ch, StackPtr,
- DAG.getSrcValue(NULL));
+ case TargetLowering::Expand:
+ Result = ExpandEXTRACT_VECTOR_ELT(Result);
break;
}
- }
break;
case ISD::VEXTRACT_VECTOR_ELT:
@@ -2990,6 +2977,9 @@
case ISD::VEXTRACT_VECTOR_ELT:
Result = PromoteOp(LowerVEXTRACT_VECTOR_ELT(Op));
break;
+ case ISD::EXTRACT_VECTOR_ELT:
+ Result = PromoteOp(ExpandEXTRACT_VECTOR_ELT(Op));
+ break;
}
assert(Result.Val && "Didn't set a result!");
@@ -3048,6 +3038,27 @@
}
}
+/// ExpandEXTRACT_VECTOR_ELT - Expand an EXTRACT_VECTOR_ELT operation into
+/// memory traffic.
+SDOperand SelectionDAGLegalize::ExpandEXTRACT_VECTOR_ELT(SDOperand Op) {
+ SDOperand Vector = Op.getOperand(0);
+ SDOperand Idx = Op.getOperand(1);
+
+ // If the target doesn't support this, store the value to a temporary
+ // stack slot, then LOAD the scalar element back out.
+ SDOperand StackPtr = CreateStackTemporary(Vector.getValueType());
+ SDOperand Ch = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
+ Vector, StackPtr, DAG.getSrcValue(NULL));
+
+ // Add the offset to the index.
+ unsigned EltSize = MVT::getSizeInBits(Op.getValueType())/8;
+ Idx = DAG.getNode(ISD::MUL, Idx.getValueType(), Idx,
+ DAG.getConstant(EltSize, Idx.getValueType()));
+ StackPtr = DAG.getNode(ISD::ADD, Idx.getValueType(), Idx, StackPtr);
+
+ return DAG.getLoad(Op.getValueType(), Ch, StackPtr, DAG.getSrcValue(NULL));
+}
+
/// LegalizeSetCCOperands - Attempts to create a legal LHS and RHS for a SETCC
/// with condition CC on the current target. This usually involves legalizing
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