[clang] [Clang] Change ballot mask handling for GPU intrinsics (PR #176202)

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github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results

* 51843 tests passed
* 905 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### Clang
<details>
<summary>Clang.Headers/gpuintrin.c</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
c:\_work\llvm-project\llvm-project\build\bin\clang.exe -cc1 -internal-isystem C:\_work\llvm-project\llvm-project\build\lib\clang\23\include -nostdsysteminc -internal-isystem C:\_work\llvm-project\llvm-project\clang\test\Headers/Inputs/include     -internal-isystem C:\_work\llvm-project\llvm-project\clang\test\Headers/../../lib/Headers/    -triple amdgcn-amd-amdhsa -emit-llvm C:\_work\llvm-project\llvm-project\clang\test\Headers\gpuintrin.c -o -  | c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\clang\test\Headers\gpuintrin.c --check-prefix=AMDGPU
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\clang.exe' -cc1 -internal-isystem 'C:\_work\llvm-project\llvm-project\build\lib\clang\23\include' -nostdsysteminc -internal-isystem 'C:\_work\llvm-project\llvm-project\clang\test\Headers/Inputs/include' -internal-isystem 'C:\_work\llvm-project\llvm-project\clang\test\Headers/../../lib/Headers/' -triple amdgcn-amd-amdhsa -emit-llvm 'C:\_work\llvm-project\llvm-project\clang\test\Headers\gpuintrin.c' -o -
# note: command had no output on stdout or stderr
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe' 'C:\_work\llvm-project\llvm-project\clang\test\Headers\gpuintrin.c' --check-prefix=AMDGPU
# .---command stderr------------
# | C:\_work\llvm-project\llvm-project\clang\test\Headers\gpuintrin.c:449:17: error: AMDGPU-NEXT: expected string not found in input
# | // AMDGPU-NEXT: [[TMP0:%.*]] = load i64, ptr [[__LANE_MASK_ADDR_ASCAST]], align 8
# |                 ^
# | <stdin>:428:50: note: scanning from here
# |  store i8 %storedv, ptr %__x.addr.ascast, align 1
# |                                                  ^
# | <stdin>:428:50: note: with "__LANE_MASK_ADDR_ASCAST" equal to "%__lane_mask.addr.ascast"
# |  store i8 %storedv, ptr %__x.addr.ascast, align 1
# |                                                  ^
# | <stdin>:429:2: note: possible intended match here
# |  %0 = load i8, ptr %__x.addr.ascast, align 1
# |  ^
# | 
# | Input file: <stdin>
# | Check file: C:\_work\llvm-project\llvm-project\clang\test\Headers\gpuintrin.c
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |           423:  %retval.ascast = addrspacecast ptr addrspace(5) %retval to ptr 
# |           424:  %__lane_mask.addr.ascast = addrspacecast ptr addrspace(5) %__lane_mask.addr to ptr 
# |           425:  %__x.addr.ascast = addrspacecast ptr addrspace(5) %__x.addr to ptr 
# |           426:  store i64 %__lane_mask, ptr %__lane_mask.addr.ascast, align 8 
# |           427:  %storedv = zext i1 %__x to i8 
# |           428:  store i8 %storedv, ptr %__x.addr.ascast, align 1 
# | next:449'0                                                      X error: no match found
# | next:449'1                                                        with "__LANE_MASK_ADDR_ASCAST" equal to "%__lane_mask.addr.ascast"
# |           429:  %0 = load i8, ptr %__x.addr.ascast, align 1 
# | next:449'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | next:449'2      ?                                            possible intended match
# |           430:  %loadedv = trunc i8 %0 to i1 
# | next:449'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           431:  %1 = call i64 @llvm.amdgcn.ballot.i64(i1 %loadedv) 
# | next:449'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |           432:  ret i64 %1 
# | next:449'0     ~~~~~~~~~~~~
# |           433: } 
# | next:449'0     ~~
# |           434:  
# | next:449'0     ~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/176202