[PATCH] D113351: [DAG] Add BuildVectorSDNode::getConstantRawBits helper

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: lebedev.ri, spatel, craig.topper, pengfei.
Herald added subscribers: ecnelises, hiraditya.
RKSimon requested review of this revision.
Herald added a project: LLVM.

We have several places where we need to extract the raw bits data from a BUILD_VECTOR node, so consolidate this to a single helper function that handles Undefs and Integer/FP constants, including implicit truncation.

This should make it easier to extend D113202 <https://reviews.llvm.org/D113202> to handle more constant folding of bitcasted constant data.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D113351

Files:
  llvm/include/llvm/CodeGen/SelectionDAGNodes.h
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/lib/Target/X86/X86ISelLowering.cpp

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