[PATCH] D64710: [x86] try to keep FP casted+truncated+extracted vector element out of GPRs

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: llvm/lib/Target/X86/X86ISelLowering.cpp:42410
+/// the sequence on XMM registers rather than moving between vector and GPRs.
+static SDValue combineToFPTruncExtElt(SDNode *N, SelectionDAG &DAG) {
+  // TODO: This is currently only used by combineSIntToFP, but it is generalized
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Could this be folded into vectorizeExtractedCast (which is done at lowering)?


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  https://reviews.llvm.org/D64710/new/

https://reviews.llvm.org/D64710