[clang] [HLSL][NFC] Refactor structured buffer methods tests (PR #161908)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-gcc-ubuntu` running on `sie-linux-worker3` while building `clang` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/174/builds/26009

<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 :: CodeGenHLSL/resources/StructuredBuffers-methods-ps.hlsl' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/clang -cc1 -internal-isystem /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/lib/clang/22/include -nostdsysteminc -triple dxil-pc-shadermodel6.3-pixel -finclude-default-header -emit-llvm -disable-llvm-passes -o - /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/clang/test/CodeGenHLSL/resources/StructuredBuffers-methods-ps.hlsl | llvm-cxxfilt | /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/clang/test/CodeGenHLSL/resources/StructuredBuffers-methods-ps.hlsl --check-prefixes=CHECK,DXIL # RUN: at line 1
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/clang -cc1 -internal-isystem /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/lib/clang/22/include -nostdsysteminc -triple dxil-pc-shadermodel6.3-pixel -finclude-default-header -emit-llvm -disable-llvm-passes -o - /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/clang/test/CodeGenHLSL/resources/StructuredBuffers-methods-ps.hlsl
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/build/bin/FileCheck /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/clang/test/CodeGenHLSL/resources/StructuredBuffers-methods-ps.hlsl --check-prefixes=CHECK,DXIL
+ llvm-cxxfilt
/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/clang/test/CodeGenHLSL/resources/StructuredBuffers-methods-ps.hlsl:26:15: error: DXIL-NEXT: expected string not found in input
// DXIL-NEXT: %[[VAL:.*]] = call i32 @llvm.dx.resource.updatecounter.tdx.RawBuffer_f32_1_1t(target("dx.RawBuffer", float, 1, 1) %[[HANDLE]], i8 1)
              ^
<stdin>:165:62: note: scanning from here
 %0 = load target("dx.RawBuffer", float, 1, 1), ptr %__handle, align 4
                                                             ^
<stdin>:165:62: note: with "HANDLE" equal to "0"
 %0 = load target("dx.RawBuffer", float, 1, 1), ptr %__handle, align 4
                                                             ^
<stdin>:167:2: note: possible intended match here
 %2 = call ptr @llvm.dx.resource.getpointer.p0.tdx.RawBuffer_f32_1_1t(target("dx.RawBuffer", float, 1, 1) %0, i32 %1)
 ^

Input file: <stdin>
Check file: /home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/clang/test/CodeGenHLSL/resources/StructuredBuffers-methods-ps.hlsl

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

Input was:
<<<<<<
           1: ; ModuleID = '/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/clang/test/CodeGenHLSL/resources/StructuredBuffers-methods-ps.hlsl' 
           2: source_filename = "/home/buildbot/buildbot-root/llvm-clang-x86_64-gcc-ubuntu/llvm-project/clang/test/CodeGenHLSL/resources/StructuredBuffers-methods-ps.hlsl" 
           3: target datalayout = "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-f32:32-f64:64-n8:16:32:64" 
           4: target triple = "dxilv1.3-pc-shadermodel6.3-pixel" 
           5:  
           6: %"class.hlsl::RasterizerOrderedStructuredBuffer" = type { target("dx.RawBuffer", float, 1, 1), target("dx.RawBuffer", float, 1, 1) } 
           7: %"class.hlsl::RasterizerOrderedStructuredBuffer.0" = type { target("dx.RawBuffer", <2 x i32>, 1, 1), target("dx.RawBuffer", <2 x i32>, 1, 1) } 
           8:  
           9:  at ROSB1 = internal global %"class.hlsl::RasterizerOrderedStructuredBuffer" poison, align 4 
check:12      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          10:  at .str = private unnamed_addr constant [6 x i8] c"ROSB1\00", align 1 
          11:  at ROSB2 = internal global %"class.hlsl::RasterizerOrderedStructuredBuffer.0" poison, align 4 
check:13      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          12:  at .str.2 = private unnamed_addr constant [6 x i8] c"ROSB2\00", align 1 
          13:  
          14: ; Function Attrs: alwaysinline convergent nounwind 
          15: define internal void @__cxx_global_var_init() #0 { 
          16: entry: 
          17:  call void @hlsl::RasterizerOrderedStructuredBuffer<float>::__createFromImplicitBindingWithImplicitCounter(unsigned int, unsigned int, int, unsigned int, char const*, unsigned int)(ptr dead_on_unwind writable sret(%"class.hlsl::RasterizerOrderedStructuredBuffer") align 4 @ROSB1, i32 noundef 0, i32 noundef 0, i32 noundef 1, i32 noundef 0, ptr noundef @.str, i32 noundef 1) #4 
          18:  ret void 
          19: } 
...

```

</details>

https://github.com/llvm/llvm-project/pull/161908