[clang] [llvm] DAGCombiner: Drop AllowFPOpFusion from visitFADDForFMACombine (PR #221436)

LLVM Continuous Integration via cfe-commits cfe-commits at lists.llvm.org
Sun Sep 6 05:15:17 PDT 2026 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-dev-x86-64` running on `ml-opt-dev-x86-64-b2` while building `clang,llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/137/builds/45841

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: CodeGen/ARM/fp16-instructions.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=arm-none-eabi -float-abi=soft     | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFT
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=arm-none-eabi -float-abi=soft
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFT
# RUN: at line 3
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=thumb-none-eabi -float-abi=soft   | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFT
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=thumb-none-eabi -float-abi=soft
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFT
# RUN: at line 4
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=thumbv8.1m.main-none-eabi -mattr=+mve | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFT
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=thumbv8.1m.main-none-eabi -mattr=+mve
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFT
# RUN: at line 5
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=thumbv8.1m.main-none-eabi -float-abi=soft -mattr=+mve | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFT
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=thumbv8.1m.main-none-eabi -float-abi=soft -mattr=+mve
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFT
# RUN: at line 8
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=arm-none-eabi -mattr=+vfp3        | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-VFP3
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=arm-none-eabi -mattr=+vfp3
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-VFP3
# RUN: at line 9
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=arm-none-eabi -mattr=+vfp4        | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-FP16,CHECK-SOFTFP-FP16-A32
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=arm-none-eabi -mattr=+vfp4
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-FP16,CHECK-SOFTFP-FP16-A32
# RUN: at line 10
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=arm-none-eabi -mattr=+fullfp16,+fp64    | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-FULLFP16
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=arm-none-eabi -mattr=+fullfp16,+fp64
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-FULLFP16
# RUN: at line 12
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=thumbv7-none-eabi -mattr=+vfp3        | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-VFP3
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=thumbv7-none-eabi -mattr=+vfp3
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-VFP3
# RUN: at line 13
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=thumbv7-none-eabi -mattr=+vfp4        | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-FP16,CHECK-SOFTFP-FP16-T32
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=thumbv7-none-eabi -mattr=+vfp4
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-FP16,CHECK-SOFTFP-FP16-T32
# RUN: at line 14
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=thumbv7-none-eabi -mattr=+fullfp16,+fp64    | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-FULLFP16
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=thumbv7-none-eabi -mattr=+fullfp16,+fp64
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK,CHECK-SOFTFP-FULLFP16
# RUN: at line 17
/b/ml-opt-dev-x86-64-b1/build/bin/llc < /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll -mtriple=arm-none-eabi -mattr=+fullfp16,+fp64 -O0 | /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK-SPILL-RELOAD
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/llc -mtriple=arm-none-eabi -mattr=+fullfp16,+fp64 -O0
# executed command: /b/ml-opt-dev-x86-64-b1/build/bin/FileCheck /b/ml-opt-dev-x86-64-b1/llvm-project/llvm/test/CodeGen/ARM/fp16-instructions.ll --check-prefixes=CHECK-SPILL-RELOAD
# RUN: at line 18
...

```

</details>

https://github.com/llvm/llvm-project/pull/221436

More information about the cfe-commits mailing list