[clang] [llvm] [AMDGPU] Support xnack on/off on gfx125x (PR #232080)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-devrel-x86-64` running on `ml-opt-devrel-x86-64-b1` while building `clang,llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/175/builds/6010

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: CodeGen/NVPTX/i16x2-instructions.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 3
/b/ml-opt-devrel-x86-64-b1/build/bin/llc < /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/i16x2-instructions.ll -mtriple=nvptx64-nvidia-cuda -mcpu=sm_90 -mattr=+ptx80                  -O0 -disable-post-ra -frame-pointer=all -verify-machineinstrs  | /b/ml-opt-devrel-x86-64-b1/build/bin/FileCheck -allow-deprecated-dag-overlap -check-prefixes COMMON,I16x2 /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/i16x2-instructions.ll
# executed command: /b/ml-opt-devrel-x86-64-b1/build/bin/llc -mtriple=nvptx64-nvidia-cuda -mcpu=sm_90 -mattr=+ptx80 -O0 -disable-post-ra -frame-pointer=all -verify-machineinstrs
# executed command: /b/ml-opt-devrel-x86-64-b1/build/bin/FileCheck -allow-deprecated-dag-overlap -check-prefixes COMMON,I16x2 /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/i16x2-instructions.ll
# .---command stderr------------
# | /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/i16x2-instructions.ll:307:16: error: COMMON-NEXT: expected string not found in input
# | ; COMMON-NEXT: .reg .b32 %r<3>;
# |                ^
# | <stdin>:222:19: note: scanning from here
# |  .reg .b16 %rs<7>;
# |                   ^
# | <stdin>:228:19: note: possible intended match here
# |  mul.hi.s16 %rs6, %rs1, %rs3;
# |                   ^
# | /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/i16x2-instructions.ll:326:16: error: COMMON-NEXT: expected string not found in input
# | ; COMMON-NEXT: .reg .b32 %r<3>;
# |                ^
# | <stdin>:239:19: note: scanning from here
# |  .reg .b16 %rs<7>;
# |                   ^
# | <stdin>:245:19: note: possible intended match here
# |  mul.hi.u16 %rs6, %rs1, %rs3;
# |                   ^
# | 
# | Input file: <stdin>
# | Check file: /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/i16x2-instructions.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |           217: .visible .func (.param .align 4 .b8 func_retval0[4]) test_smulh( 
# |           218:  .param .align 4 .b8 test_smulh_param_0[4], 
# |           219:  .param .align 4 .b8 test_smulh_param_1[4] 
# |           220: ) // @test_smulh 
# |           221: { 
# |           222:  .reg .b16 %rs<7>; 
# | next:307'0                      {   search range start (exclusive)
# | next:307'1                          error: no match found in search range
# |           223:  
# |           224: // %bb.0: 
# |           225:  ld.param.v2.b16 {%rs1, %rs2}, [test_smulh_param_0]; 
...

```

</details>

https://github.com/llvm/llvm-project/pull/232080