[llvm] [LV] Handle FSub Partial Reductions (PR #191186)
LLVM Continuous Integration via llvm-commits
llvm-commits at lists.llvm.org
Mon May 11 03:23:54 PDT 2026
llvm-ci wrote:
LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-hwasan` running on `sanitizer-buildbot11` while building `llvm` at step 2 "annotate".
Full details are available at: https://lab.llvm.org/buildbot/#/builders/55/builds/27954
<details>
<summary>Here is the relevant piece of the build log for the reference</summary>
```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/main.py:74: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 98025 tests, 72 workers --
Testing: 0.. 10.. 20.. 30.. 40.. 50.. 60.. 70..
FAIL: LLVM :: Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll (76746 of 98025)
******************** TEST 'LLVM :: Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll' FAILED ********************
Exit Code: 1
Command Output (stdout):
--
# RUN: at line 2
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -passes=loop-vectorize -force-vector-interleave=1 -enable-epilogue-vectorization=true -epilogue-vectorization-force-VF=4 -vectorizer-maximize-bandwidth -S < /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll | /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll --check-prefix=CHECK-EPI
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -passes=loop-vectorize -force-vector-interleave=1 -enable-epilogue-vectorization=true -epilogue-vectorization-force-VF=4 -vectorizer-maximize-bandwidth -S
# .---command stderr------------
# | remark: <unknown>:0:0: Scalable vectorization is explicitly disabled
# `-----------------------------
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll --check-prefix=CHECK-EPI
# .---command stderr------------
# | /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll:196:19: error: CHECK-EPI-NEXT: is not on the line after the previous match
# | ; CHECK-EPI-NEXT: br label %[[VECTOR_PH:.*]]
# | ^
# | <stdin>:107:2: note: 'next' match was here
# | br label %vector.body
# | ^
# | <stdin>:105:11: note: previous match ended here
# | vector.ph: ; preds = %vector.main.loop.iter.check
# | ^
# | <stdin>:106:1: note: non-matching line after previous match is here
# | %0 = insertelement <16 x float> splat (float -0.000000e+00), float %startval, i32 0
# | ^
# | /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll:366:19: error: CHECK-EPI-NEXT: expected string not found in input
# | ; CHECK-EPI-NEXT: [[VEC_PHI:%.*]] = phi <4 x float> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[PARTIAL_REDUCE3:%.*]], %[[VECTOR_BODY]] ]
# | ^
# | <stdin>:192:67: note: scanning from here
# | %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
# | ^
# | <stdin>:192:67: note: with "VECTOR_PH" equal to "vector.ph"
# | %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
# | ^
# | <stdin>:192:67: note: with "VECTOR_BODY" equal to "vector.body"
# | %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
# | ^
# | <stdin>:193:4: note: possible intended match here
Step 11 (stage2/hwasan check) failure: stage2/hwasan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/main.py:74: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 98025 tests, 72 workers --
Testing: 0.. 10.. 20.. 30.. 40.. 50.. 60.. 70..
FAIL: LLVM :: Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll (76746 of 98025)
******************** TEST 'LLVM :: Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll' FAILED ********************
Exit Code: 1
Command Output (stdout):
--
# RUN: at line 2
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -passes=loop-vectorize -force-vector-interleave=1 -enable-epilogue-vectorization=true -epilogue-vectorization-force-VF=4 -vectorizer-maximize-bandwidth -S < /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll | /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll --check-prefix=CHECK-EPI
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/opt -passes=loop-vectorize -force-vector-interleave=1 -enable-epilogue-vectorization=true -epilogue-vectorization-force-VF=4 -vectorizer-maximize-bandwidth -S
# .---command stderr------------
# | remark: <unknown>:0:0: Scalable vectorization is explicitly disabled
# `-----------------------------
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build_hwasan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll --check-prefix=CHECK-EPI
# .---command stderr------------
# | /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll:196:19: error: CHECK-EPI-NEXT: is not on the line after the previous match
# | ; CHECK-EPI-NEXT: br label %[[VECTOR_PH:.*]]
# | ^
# | <stdin>:107:2: note: 'next' match was here
# | br label %vector.body
# | ^
# | <stdin>:105:11: note: previous match ended here
# | vector.ph: ; preds = %vector.main.loop.iter.check
# | ^
# | <stdin>:106:1: note: non-matching line after previous match is here
# | %0 = insertelement <16 x float> splat (float -0.000000e+00), float %startval, i32 0
# | ^
# | /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll:366:19: error: CHECK-EPI-NEXT: expected string not found in input
# | ; CHECK-EPI-NEXT: [[VEC_PHI:%.*]] = phi <4 x float> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[PARTIAL_REDUCE3:%.*]], %[[VECTOR_BODY]] ]
# | ^
# | <stdin>:192:67: note: scanning from here
# | %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
# | ^
# | <stdin>:192:67: note: with "VECTOR_PH" equal to "vector.ph"
# | %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
# | ^
# | <stdin>:192:67: note: with "VECTOR_BODY" equal to "vector.body"
# | %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
# | ^
# | <stdin>:193:4: note: possible intended match here
Step 14 (stage3/hwasan check) failure: stage3/hwasan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/main.py:74: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 94140 tests, 72 workers --
Testing: 0.. 10.. 20.. 30.. 40.. 50.. 60.. 70..
FAIL: LLVM :: Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll (76756 of 94140)
******************** TEST 'LLVM :: Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll' FAILED ********************
Exit Code: 1
Command Output (stdout):
--
# RUN: at line 2
not --crash /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/opt -passes=loop-vectorize -S /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll 2>&1 | /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll --check-prefix=ASSERTION
# executed command: not --crash /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/opt -passes=loop-vectorize -S /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll
# note: command had no output on stdout or stderr
# error: command failed with exit status: 1
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build2_hwasan/bin/FileCheck /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll --check-prefix=ASSERTION
# .---command stderr------------
# | /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll:11:14: error: ASSERTION: expected string not found in input
# | ; ASSERTION: (Chain.RK != RecurKind::FAddChainWithSubs)
# | ^
# | <stdin>:1:1: note: scanning from here
# | ; ModuleID = '/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll'
# | ^
# | <stdin>:45:4: note: possible intended match here
# | %21 = icmp eq i32 %index.next, 1024
# | ^
# |
# | Input file: <stdin>
# | Check file: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll
# |
# | -dump-input=help explains the following input dump.
# |
# | Input was:
# | <<<<<<
# | 1: ; ModuleID = '/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll'
# | check:11'0 X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# | 2: source_filename = "/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-fsub-chained.ll"
# | check:11'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 3: target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
# | check:11'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 4: target triple = "aarch64-none-unknown-elf"
# | check:11'0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | 5:
```
</details>
https://github.com/llvm/llvm-project/pull/191186
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