Fangrui Song 9e9907f1cf
[AMDGPU,test] Change llc -march= to -mtriple= (#75982)
Similar to 806761a7629df268c8aed49657aeccffa6bca449.

For IR files without a target triple, -mtriple= specifies the full
target triple while -march= merely sets the architecture part of the
default target triple, leaving a target triple which may not make sense,
e.g. amdgpu-apple-darwin.

Therefore, -march= is error-prone and not recommended for tests without
a target triple. The issue has been benign as we recognize
$unknown-apple-darwin as ELF instead of rejecting it outrightly.

This patch changes AMDGPU tests to not rely on the default
OS/environment components. Tests that need fixes are not changed:

```
  LLVM :: CodeGen/AMDGPU/fabs.f64.ll
  LLVM :: CodeGen/AMDGPU/fabs.ll
  LLVM :: CodeGen/AMDGPU/floor.ll
  LLVM :: CodeGen/AMDGPU/fneg-fabs.f64.ll
  LLVM :: CodeGen/AMDGPU/fneg-fabs.ll
  LLVM :: CodeGen/AMDGPU/r600-infinite-loop-bug-while-reorganizing-vector.ll
  LLVM :: CodeGen/AMDGPU/schedule-if-2.ll
```
2024-01-16 21:54:58 -08:00

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# RUN: llc -mtriple=amdgcn -mcpu=gfx1010 -run-pass=si-peephole-sdwa -verify-machineinstrs -o - %s | FileCheck -check-prefix=GCN %s
# Do not fold stack objects into SDWA.
---
# GCN-LABEL: name: sdwa_stack_object_src0
# GCN: V_ADD_U32_e64 %stack.0, killed %1
name: sdwa_stack_object_src0
stack:
- { id: 0, type: default, offset: 0, size: 32, alignment: 4, stack-id: default }
body: |
bb.0:
%0:vgpr_32 = IMPLICIT_DEF
%1:vgpr_32 = V_AND_B32_e32 255, %0, implicit $exec
%2:vgpr_32 = V_ADD_U32_e64 %stack.0, killed %1, 0, implicit $exec
S_ENDPGM 0, implicit %2
...
---
name: sdwa_stack_object_src1
# GCN-LABEL: name: sdwa_stack_object_src1
# GCN: V_ADD_U32_e64 killed %1, %stack.0
stack:
- { id: 0, type: default, offset: 0, size: 32, alignment: 4, stack-id: default }
body: |
bb.0:
%0:vgpr_32 = IMPLICIT_DEF
%1:vgpr_32 = V_AND_B32_e32 255, %0, implicit $exec
%2:vgpr_32 = V_ADD_U32_e64 killed %1, %stack.0, 0, implicit $exec
S_ENDPGM 0, implicit %2
...