[llvm] [GlobalISel] Legalize wide-memory extending loads via load + extension (PR #206276)

[via llvm-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 178760 tests passed
* 3597 tests skipped
* 1 test failed

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

### LLVM
<details>
<summary>LLVM.CodeGen/AMDGPU/GlobalISel/zextload.ll</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -global-isel -global-isel-abort=2 -mtriple=amdgcn-amd-amdpal -mcpu=gfx900 < /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck --check-prefix=GFX9 /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -global-isel -global-isel-abort=2 -mtriple=amdgcn-amd-amdpal -mcpu=gfx900
# note: command had no output on stdout or stderr
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck --check-prefix=GFX9 /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll
# note: command had no output on stdout or stderr
# RUN: at line 3
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -global-isel -global-isel-abort=2 -mtriple=amdgcn-amd-amdpal -mcpu=fiji < /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck --check-prefix=GFX8 /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -global-isel -global-isel-abort=2 -mtriple=amdgcn-amd-amdpal -mcpu=fiji
# note: command had no output on stdout or stderr
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck --check-prefix=GFX8 /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll
# note: command had no output on stdout or stderr
# RUN: at line 4
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -global-isel -global-isel-abort=2 -mtriple=amdgcn-amd-amdpal -mcpu=tahiti < /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck --check-prefix=GFX6 /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -global-isel -global-isel-abort=2 -mtriple=amdgcn-amd-amdpal -mcpu=tahiti
# note: command had no output on stdout or stderr
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck --check-prefix=GFX6 /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll:471:14: error: GFX6-NEXT: expected string not found in input
# | ; GFX6-NEXT: s_mov_b32 s4, s6
# |              ^
# | <stdin>:318:22: note: scanning from here
# |  s_mov_b32 s7, 0xf000
# |                      ^
# | <stdin>:319:2: note: possible intended match here
# |  s_mov_b64 s[4:5], 0
# |  ^
# | 
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/zextload.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |           313:  .type zextload_global_i64_to_i128, at function 
# |           314: zextload_global_i64_to_i128: ; @zextload_global_i64_to_i128 
# |           315: ; %bb.0: 
# |           316:  s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0) 
# |           317:  s_mov_b32 s6, 0 
# |           318:  s_mov_b32 s7, 0xf000 
# | next:471'0                         {   search range start (exclusive)
# | next:471'1                             error: no match found in search range
# |           319:  s_mov_b64 s[4:5], 0 
# | next:471'2      ?                     possible intended match
# |           320:  buffer_load_dwordx2 v[0:1], v[0:1], s[4:7], 0 addr64 
# |           321:  v_mov_b32_e32 v2, 0 
# |           322:  v_mov_b32_e32 v3, 0 
# |           323:  s_waitcnt vmcnt(0) 
# |           324:  s_setpc_b64 s[30:31] 
# |             .
# |             .
# |             .
# |           353:  .amdgpu_pal_metadata 
# |           354: --- 
# |           355: amdpal.pipelines: 
# |           356:  - .registers: {} 
# |           357: ... 
# |           358:  .end_amdgpu_pal_metadata 
# | next:471'3                               } search range end (exclusive)
# | >>>>>>
# `-----------------------------
# 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/206276