Fix comment and unnecessary check for FP build_vectors.
This was copy-paste from the integer version, but
FP build_vectors don't truncate.
llvm-svn: 216928
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 1186683..e556e74 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -711,11 +711,7 @@
BitVector UndefElements;
ConstantFPSDNode *CN = BV->getConstantFPSplatNode(&UndefElements);
- // BuildVectors can truncate their operands. Ignore that case here.
- // FIXME: We blindly ignore splats which include undef which is overly
- // pessimistic.
- if (CN && UndefElements.none() &&
- CN->getValueType(0) == N.getValueType().getScalarType())
+ if (CN && UndefElements.none())
return CN;
}