[llvm] [AMDGPU] Reorganize tests to unblock #112403 (PR #115503)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/16/builds/8546

<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/AMDGPU/call-args-inreg-no-sgpr-for-csrspill-xfail.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: not --crash /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/CodeGen/AMDGPU/call-args-inreg-no-sgpr-for-csrspill-xfail.ll -filetype=null 2>&1 | /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/FileCheck -enable-var-scope /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/CodeGen/AMDGPU/call-args-inreg-no-sgpr-for-csrspill-xfail.ll
+ not --crash /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/CodeGen/AMDGPU/call-args-inreg-no-sgpr-for-csrspill-xfail.ll -filetype=null
+ /b/1/llvm-clang-x86_64-expensive-checks-debian/build/bin/FileCheck -enable-var-scope /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/CodeGen/AMDGPU/call-args-inreg-no-sgpr-for-csrspill-xfail.ll
/b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/CodeGen/AMDGPU/call-args-inreg-no-sgpr-for-csrspill-xfail.ll:3:10: error: CHECK: expected string not found in input
; CHECK: LLVM ERROR: failed to find free scratch register
         ^
<stdin>:1:1: note: scanning from here

^
<stdin>:2:14: note: possible intended match here
# After Eliminate PHI nodes for register allocation
             ^

Input file: <stdin>
Check file: /b/1/llvm-clang-x86_64-expensive-checks-debian/llvm-project/llvm/test/CodeGen/AMDGPU/call-args-inreg-no-sgpr-for-csrspill-xfail.ll

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

Input was:
<<<<<<
           1:  
check:3'0     X error: no match found
           2: # After Eliminate PHI nodes for register allocation 
check:3'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
check:3'1                  ?                                       possible intended match
           3: # Machine code for function test_call_external_void_func_a15i32_inreg: NoPHIs, TracksLiveness 
check:3'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           4: Function Live Ins: $sgpr4_sgpr5 in %0, $sgpr6_sgpr7 in %1, $sgpr8_sgpr9 in %2, $sgpr10_sgpr11 in %3, $sgpr12 in %4, $sgpr13 in %5, $sgpr14 in %6, $sgpr15 in %7, $sgpr16 in %8, $sgpr17 in %9, $sgpr18 in %10, $sgpr19 in %11, $sgpr20 in %12, $sgpr21 in %13, $sgpr22 in %14, $sgpr23 in %15, $sgpr24 in %16, $sgpr25 in %17, $sgpr26 in %18, $sgpr27 in %19, $sgpr28 in %20, $sgpr29 in %21, $vgpr0 in %22, $vgpr31 in %23 
check:3'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           5:  
check:3'0     ~
           6: bb.0 (%ir-block.0): 
check:3'0     ~~~~~~~~~~~~~~~~~~~~
           7:  liveins: $sgpr4_sgpr5, $sgpr6_sgpr7, $sgpr8_sgpr9, $sgpr10_sgpr11, $sgpr12, $sgpr13, $sgpr14, $sgpr15, $sgpr16, $sgpr17, $sgpr18, $sgpr19, $sgpr20, $sgpr21, $sgpr22, $sgpr23, $sgpr24, $sgpr25, $sgpr26, $sgpr27, $sgpr28, $sgpr29, $vgpr0, $vgpr31 
check:3'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           .
           .
           .
>>>>>>

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/115503