[PATCH] D87415: [DAGCombiner] Fold fminnum(X, NaN) to X

[Nikita Popov via Phabricator via llvm-commits]

nikic created this revision.
nikic added reviewers: spatel, RKSimon, craig.topper.
Herald added subscribers: llvm-commits, ecnelises, hiraditya.
Herald added a project: LLVM.
nikic requested review of this revision.

If one operand to FMINNUM and FMAXNUM is NaN, then the other operand is returned. This makes NaN a neutral element for these operations, which should improve the lowerings from D87391 <https://reviews.llvm.org/D87391>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D87415

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/X86/fmaxnum.ll
  llvm/test/CodeGen/X86/fminnum.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D87415.290822.patch
Type: text/x-patch
Size: 4615 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20200909/2b0877c3/attachment.bin>