[PATCH] D75467: [instcombine] remove fsub to fneg hacks; only emit fneg

[Sanjay Patel via Phabricator via cfe-commits]

spatel accepted this revision.
spatel added a comment.

LGTM - see inline for 1 more comment nit.



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Comment at: llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp:2132
 
   // Subtraction from -0.0 is the canonical form of fneg.
+  // fsub -0.0, X ==> fneg X
----------------
This comment is stale. Remove or update to something like:
  // Convert fsub from zero to the canonical fneg instruction.


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https://reviews.llvm.org/D75467