[PATCH] D85548: Allow fneg + strict_fadd -> strict_fsub in DAGCombiner

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

Why wait until codegen to do this? IIUC, it's impossible for any backend to spontaneously create strict FP ops, so this pattern must be present in the original IR.
Ie, wouldn't we be better off reducing these in IR (InstCombinerImpl::visitCallInst())?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D85548/new/

https://reviews.llvm.org/D85548