[llvm] [AMDGPU] Track LDS DMA VGPR source reads in expert scheduling (PR #203292)

[via llvm-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results

* 135648 tests passed
* 3420 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### LLVM
<details>
<summary>LLVM.CodeGen/AMDGPU/expert_scheduling_gfx1250.mir</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
c:\_work\llvm-project\llvm-project\build\bin\llc.exe -mtriple=amdgcn -mcpu=gfx1250 -amdgpu-expert-scheduling-mode -run-pass=si-insert-waitcnts C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\AMDGPU\expert_scheduling_gfx1250.mir -o - | c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\AMDGPU\expert_scheduling_gfx1250.mir
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\llc.exe' -mtriple=amdgcn -mcpu=gfx1250 -amdgpu-expert-scheduling-mode -run-pass=si-insert-waitcnts 'C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\AMDGPU\expert_scheduling_gfx1250.mir' -o -
# note: command had no output on stdout or stderr
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe' 'C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\AMDGPU\expert_scheduling_gfx1250.mir'
# .---command stderr------------
# | C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\AMDGPU\expert_scheduling_gfx1250.mir:44:16: error: CHECK-NEXT: is not on the line after the previous match
# |  ; CHECK-NEXT: $vgpr0 = V_MOV_B32_e32 1, implicit $exec
# |                ^
# | <stdin>:268:2: note: 'next' match was here
# |  $vgpr0 = V_MOV_B32_e32 1, implicit $exec
# |  ^
# | <stdin>:266:174: note: previous match ended here
# |  GLOBAL_LOAD_ASYNC_TO_LDS_B32 $vgpr2, $vgpr0_vgpr1, 0, 0, implicit-def $asynccnt, implicit $exec, implicit $asynccnt :: (load (s32), addrspace 1), (store (s32), addrspace 3)
# |                                                                                                                                                                              ^
# | <stdin>:267:1: note: non-matching line after previous match is here
# |  S_WAITCNT_DEPCTR .VmVsrc_0
# | ^
# | C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\AMDGPU\expert_scheduling_gfx1250.mir:62:16: error: CHECK-NEXT: is not on the line after the previous match
# |  ; CHECK-NEXT: $vgpr2 = V_MOV_B32_e32 1, implicit $exec
# |                ^
# | <stdin>:382:2: note: 'next' match was here
# |  $vgpr2 = V_MOV_B32_e32 1, implicit $exec
# |  ^
# | <stdin>:380:174: note: previous match ended here
# |  GLOBAL_LOAD_ASYNC_TO_LDS_B32 $vgpr2, $vgpr0_vgpr1, 0, 0, implicit-def $asynccnt, implicit $exec, implicit $asynccnt :: (load (s32), addrspace 1), (store (s32), addrspace 3)
# |                                                                                                                                                                              ^
# | <stdin>:381:1: note: non-matching line after previous match is here
# |  S_WAITCNT_DEPCTR .VmVsrc_0
# | ^
# | 
# | Input file: <stdin>
# | Check file: C:\_work\llvm-project\llvm-project\llvm\test\CodeGen\AMDGPU\expert_scheduling_gfx1250.mir
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |          .
# |          .
# |          .
# |        263:  liveins: $vgpr0, $vgpr1, $vgpr2 
# |        264:   
# |        265:  S_SETREG_IMM32_B32 2, 2074, implicit-def $mode, implicit $mode 
# |        266:  GLOBAL_LOAD_ASYNC_TO_LDS_B32 $vgpr2, $vgpr0_vgpr1, 0, 0, implicit-def $asynccnt, implicit $exec, implicit $asynccnt :: (load (s32), addrspace 1), (store (s32), addrspace 3) 
# |        267:  S_WAITCNT_DEPCTR .VmVsrc_0 
# |        268:  $vgpr0 = V_MOV_B32_e32 1, implicit $exec 
# | next:44      !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  error: match on wrong line
# |        269: ... 
# |        270: --- 
# |        271: name: async_global_to_lds_vdst_vsrc_war 
# |        272: alignment: 1 
# |        273: exposesReturnsTwice: false 
# |          .
# |          .
# |          .
# |        377:  liveins: $vgpr0, $vgpr1, $vgpr2 
# |        378:   
# |        379:  S_SETREG_IMM32_B32 2, 2074, implicit-def $mode, implicit $mode 
# |        380:  GLOBAL_LOAD_ASYNC_TO_LDS_B32 $vgpr2, $vgpr0_vgpr1, 0, 0, implicit-def $asynccnt, implicit $exec, implicit $asynccnt :: (load (s32), addrspace 1), (store (s32), addrspace 3) 
# |        381:  S_WAITCNT_DEPCTR .VmVsrc_0 
# |        382:  $vgpr2 = V_MOV_B32_e32 1, implicit $exec 
# | next:62      !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  error: match on wrong line
# |        383: ... 
# |        384: --- 
# |        385: name: global_load_vsrc_war 
# |        386: alignment: 1 
# |        387: exposesReturnsTwice: false 
# |          .
# |          .
# |          .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/203292