[all-commits] [llvm/llvm-project] e9f303: InstCombine: Perform basic isnan combines on llvm....

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e9f3034febc62d77caaa0746358332f4f4bead49
      https://github.com/llvm/llvm-project/commit/e9f3034febc62d77caaa0746358332f4f4bead49
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2023-02-05 (Sun, 05 Feb 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
    M llvm/lib/Transforms/InstCombine/InstCombineInternal.h
    M llvm/test/Transforms/InstCombine/combine-is.fpclass-and-fcmp.ll
    M llvm/test/Transforms/InstCombine/is_fpclass.ll

  Log Message:
  -----------
  InstCombine: Perform basic isnan combines on llvm.is.fpclass

is.fpclass(x, qnan|snan) -> fcmp uno x, 0.0
is.fpclass(nnan x, qnan|snan|other) -> is.fpclass(x, other)

Start porting the existing combines from llvm.amdgcn.class to the
generic intrinsic. Start with the ones which aren't dependent on the
FP mode.