[llvm] [AMDGPU] Add support for GFX12 expert scheduling mode 2 (PR #170319)

[Jay Foad via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=amdgcn-- -mcpu=gfx1200 -amdgpu-expert-scheduling-mode | FileCheck %s --check-prefix=GFX12
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jayfoad wrote:

Done.

https://github.com/llvm/llvm-project/pull/170319