Changes in directory llvm/lib/CodeGen/SelectionDAG:
DAGCombiner.cpp updated: 1.73 -> 1.74
---
Log message:
Simplify store(bitconv(x)) to store(x). This allows us to compile this:
void bar(double Y, double *X) {
*X = Y;
}
to this:
bar:
save -96, %o6, %o6
st %i1, [%i2+4]
st %i0, [%i2]
restore %g0, %g0, %g0
retl
nop
instead of this:
bar:
save -104, %o6, %o6
st %i1, [%i6+-4]
st %i0, [%i6+-8]
ldd [%i6+-8], %f0
std %f0, [%i2]
restore %g0, %g0, %g0
retl
nop
on sparcv8.
---
Diffs of the changes: (+5 -0)
DAGCombiner.cpp | 5 +++++
1 files changed, 5 insertions(+)
Index: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.73
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.74
--- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.73 Thu Dec 22 23:44:41 2005
+++ llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Thu Dec 22 23:48:07 2005
@@ -2081,6 +2081,11 @@
return SDOperand(N, 0);
}
+ // If this is a store of a bit convert, store the input value.
+ if (Value.getOpcode() == ISD::BIT_CONVERT)
+ return DAG.getNode(ISD::STORE, MVT::Other, Chain, Value.getOperand(0),
+ Ptr, SrcValue);
+
return SDOperand();
}
_______________________________________________
llvm-commits mailing list
llvm-commits@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
