[clang] [llvm] [AMDGPU][GFX12.5] Reimplement monitor load as an atomic operation (PR #177343)

[Matt Arsenault via cfe-commits]

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+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
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+// REQUIRES: amdgpu-registered-target
+// RUN: %clang_cc1 -O3 -triple amdgcn-unknown-unknown -target-cpu gfx1250 -fcuda-is-device -emit-llvm -o - %s | FileCheck %s
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arsenm wrote:

No -O3, Maybe -O1 -disable-llvm-passes 

https://github.com/llvm/llvm-project/pull/177343