[llvm] [RegAlloc] Fix the terminal rule check for interfere with DstReg (PR #168661)

LLVM Continuous Integration via llvm-commits llvm-commits at lists.llvm.org
Sat Nov 22 19:57:59 PST 2025 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-s390x-linux` running on `systemz-1` while building `llvm` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/42/builds/7085

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'LLVM :: CodeGen/AMDGPU/local-atomicrmw-fadd.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1200 -mattr=+real-true16 < /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll | /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefixes=GFX12,GFX12-TRUE16 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1200 -mattr=+real-true16
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefixes=GFX12,GFX12-TRUE16 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# RUN: at line 3
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1200 -mattr=-real-true16 < /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll | /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefixes=GFX12,GFX12-FAKE16 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1200 -mattr=-real-true16
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefixes=GFX12,GFX12-FAKE16 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# RUN: at line 4
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx942 < /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll | /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefix=GFX942 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx942
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefix=GFX942 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# RUN: at line 5
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1100 -mattr=+real-true16 < /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll | /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefixes=GFX11,GFX11-TRUE16 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1100 -mattr=+real-true16
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefixes=GFX11,GFX11-TRUE16 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# RUN: at line 6
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1100 -mattr=-real-true16 < /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll | /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefixes=GFX11,GFX11-FAKE16 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1100 -mattr=-real-true16
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefixes=GFX11,GFX11-FAKE16 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# RUN: at line 7
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1010 < /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll | /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefix=GFX10 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx1010
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefix=GFX10 /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# RUN: at line 8
/home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx90a < /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll | /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefix=GFX90A /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/llc -mtriple=amdgcn-amd-amdpal -mcpu=gfx90a
# executed command: /home/uweigand/sandbox/buildbot/clang-s390x-linux/stage1/bin/FileCheck -check-prefix=GFX90A /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
# .---command stderr------------
# | /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll:6965:16: error: GFX90A-NEXT: expected string not found in input
# | ; GFX90A-NEXT: ds_read_b32 v3, v0
# |                ^
# | <stdin>:1128:41: note: scanning from here
# |  s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
# |                                         ^
# | <stdin>:1129:2: note: possible intended match here
# |  ds_read_b32 v4, v0
# |  ^
# | /home/uweigand/sandbox/buildbot/clang-s390x-linux/llvm/llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll:7319:16: error: GFX90A-NEXT: expected string not found in input
# | ; GFX90A-NEXT: ds_read_b32 v3, v0 offset:65532
# |                ^
# | <stdin>:1192:41: note: scanning from here
# |  s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
# |                                         ^
# | <stdin>:1193:2: note: possible intended match here
...

```

</details>

https://github.com/llvm/llvm-project/pull/168661

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