[llvm] Update amdgpu_gfx functions to use s0-s3 for inreg SGPR arguments on targets using scratch instructions for stack #78226 (PR #81394)

[via llvm-commits]

SahilPatidar wrote:

@arsenm 
Failed Tests (20):
  LLVM :: CodeGen/AMDGPU/GlobalISel/irtranslator-call-non-fixed.ll
  LLVM :: CodeGen/AMDGPU/GlobalISel/irtranslator-call.ll
  LLVM :: CodeGen/AMDGPU/GlobalISel/irtranslator-function-args.ll
  LLVM :: CodeGen/AMDGPU/amdgpu-simplify-libcall-pow-codegen.ll
  LLVM :: CodeGen/AMDGPU/bf16.ll
  LLVM :: CodeGen/AMDGPU/call-args-inreg.ll
  LLVM :: CodeGen/AMDGPU/combine_andor_with_cmps.ll
  LLVM :: CodeGen/AMDGPU/flat_atomics_i32_system.ll
  LLVM :: CodeGen/AMDGPU/flat_atomics_i64_system.ll
  LLVM :: CodeGen/AMDGPU/fsub-as-fneg-src-modifier.ll
  LLVM :: CodeGen/AMDGPU/function-args-inreg.ll
  LLVM :: CodeGen/AMDGPU/gfx-callable-argument-types.ll
  LLVM :: CodeGen/AMDGPU/global_atomics_i32_system.ll
  LLVM :: CodeGen/AMDGPU/global_atomics_i64_system.ll
  LLVM :: CodeGen/AMDGPU/indirect-call.ll
  LLVM :: CodeGen/AMDGPU/preserve-wwm-copy-dst-reg.ll
  LLVM :: CodeGen/AMDGPU/schedule-addrspaces.ll
  LLVM :: CodeGen/AMDGPU/scratch-pointer-sink.ll
  LLVM :: CodeGen/AMDGPU/stacksave_stackrestore.ll
  LLVM :: CodeGen/AMDGPU/wwm-reserved-spill.ll


Testing Time: 3196.43s

Total Discovered Tests: 3484
  Unsupported      :    1 (0.03%)
  Passed           : 3455 (99.17%)
  Expectedly Failed:    8 (0.23%)
  Failed           :   20 (0.57%)
Total of 20 cases failed, but when I updated, around 5 to 6 tests crashed.

https://github.com/llvm/llvm-project/pull/81394