[llvm] [AMDGPU] Try to reuse in v_cndmask register with constant from compare. (PR #131146)

[Daniil Fukalov via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=amdgcn -mcpu=gfx900 -verify-machineinstrs  < %s | FileCheck %s -check-prefix=GFX9
+; RUN: llc -mtriple=amdgcn -mcpu=gfx1030 -verify-machineinstrs  < %s | FileCheck %s -check-prefix=GFX10
+
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dfukalov wrote:

For the cases the immediate is already inlined into v_cndmask if it was possible. E.g. in the test they are successfully inlined for gfx1030 before the moment when the patch processes v_cndmask. In such cases it just skips the instruction.

https://github.com/llvm/llvm-project/pull/131146