[clang] [Clang][GPU] Fix unit test for NVPTX tid.x intrinsic (PR #136297)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-x86_64-debian-fast` running on `gribozavr4` while building `clang` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/56/builds/23794

<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 'Clang :: Headers/gpuintrin_lang.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/b/1/clang-x86_64-debian-fast/llvm.obj/bin/clang -cc1 -internal-isystem /b/1/clang-x86_64-debian-fast/llvm.obj/lib/clang/21/include -nostdsysteminc -internal-isystem /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/Inputs/include    -internal-isystem /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/../../lib/Headers/cuda_wrappers    -internal-isystem /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/../../lib/Headers/    -fcuda-is-device -triple nvptx64 -emit-llvm /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/gpuintrin_lang.c -o -  | /b/1/clang-x86_64-debian-fast/llvm.obj/bin/FileCheck /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/gpuintrin_lang.c --check-prefix=CUDA # RUN: at line 2
+ /b/1/clang-x86_64-debian-fast/llvm.obj/bin/FileCheck /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/gpuintrin_lang.c --check-prefix=CUDA
+ /b/1/clang-x86_64-debian-fast/llvm.obj/bin/clang -cc1 -internal-isystem /b/1/clang-x86_64-debian-fast/llvm.obj/lib/clang/21/include -nostdsysteminc -internal-isystem /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/Inputs/include -internal-isystem /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/../../lib/Headers/cuda_wrappers -internal-isystem /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/../../lib/Headers/ -fcuda-is-device -triple nvptx64 -emit-llvm /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/gpuintrin_lang.c -o -
/b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/gpuintrin_lang.c:39:15: error: CUDA-NEXT: expected string not found in input
// CUDA-NEXT: [[TMP0:%.*]] = call i32 @llvm.nvvm.read.ptx.sreg.tid.x()
              ^
<stdin>:8:7: note: scanning from here
entry:
      ^
<stdin>:9:17: note: possible intended match here
 %0 = call range(i32 0, 1024) i32 @llvm.nvvm.read.ptx.sreg.tid.x()
                ^

Input file: <stdin>
Check file: /b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/gpuintrin_lang.c

-dump-input=help explains the following input dump.

Input was:
<<<<<<
           1: ; ModuleID = '/b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/gpuintrin_lang.c' 
           2: source_filename = "/b/1/clang-x86_64-debian-fast/llvm.src/clang/test/Headers/gpuintrin_lang.c" 
           3: target datalayout = "e-p6:32:32-i64:64-i128:128-v16:16-v32:32-n16:32:64" 
           4: target triple = "nvptx64" 
           5:  
           6: ; Function Attrs: convergent noinline nounwind optnone 
           7: define dso_local i32 @foo() #0 { 
           8: entry: 
next:39'0           X error: no match found
           9:  %0 = call range(i32 0, 1024) i32 @llvm.nvvm.read.ptx.sreg.tid.x() 
next:39'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
next:39'1                     ?                                                   possible intended match
          10:  ret i32 %0 
next:39'0     ~~~~~~~~~~~~
          11: } 
next:39'0     ~~
          12:  
next:39'0     ~
          13: ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) 
next:39'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          14: declare noundef i32 @llvm.nvvm.read.ptx.sreg.tid.x() #1 
next:39'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           .
           .
           .
...

```

</details>

https://github.com/llvm/llvm-project/pull/136297