[llvm] [AMDGPU] (x or y) xor -1 -> x nor y (PR #130264)

[Matt Arsenault via llvm-commits]

================
@@ -0,0 +1,68 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3
+; RUN: llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1200 -mattr="+wavefrontsize32,-wavefrontsize64" -o - < %s | FileCheck %s
+; RUN: llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1100 -mattr="+wavefrontsize32,-wavefrontsize64" -o - < %s | FileCheck %s
----------------
arsenm wrote:

Don't need the -wavefrontsize64 cases. Also this isn't testing the wave64 case. Plus add -global-isel run lines, I would hope this pattern works without issue 

https://github.com/llvm/llvm-project/pull/130264