[all-commits] [llvm/llvm-project] 2b5824: InstCombine: Fold is.fpclass(x, fcInf) to fabs+fcmp

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2b582440c16c72b6b021ea5c212ceda3bdfb2b9b
      https://github.com/llvm/llvm-project/commit/2b582440c16c72b6b021ea5c212ceda3bdfb2b9b
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2023-08-29 (Tue, 29 Aug 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
    M llvm/test/Transforms/InstCombine/and-fcmp.ll
    M llvm/test/Transforms/InstCombine/combine-is.fpclass-and-fcmp.ll
    M llvm/test/Transforms/InstCombine/create-class-from-logic-fcmp.ll
    M llvm/test/Transforms/InstCombine/is_fpclass.ll

  Log Message:
  -----------
  InstCombine: Fold is.fpclass(x, fcInf) to fabs+fcmp

This is a better canonical form. fcmp and fabs are more widely
understood and fabs can fold for free into some sources.

Addresses todo from D146170

https://reviews.llvm.org/D159084