[llvm] [RISCV] Account for zvfhmin and zvfbfmin promotion in register usage (PR #108370)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `fuchsia-x86_64-linux` running on `fuchsia-debian-64-us-central1-a-1` while building `llvm` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/11/builds/5124

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

```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/fuchsia-linux.py ...' (failure)
...
[1322/1327] Building CXX object unittests/Transforms/Scalar/CMakeFiles/ScalarTests.dir/LoopPassManagerTest.cpp.o
clang++: warning: optimization flag '-ffat-lto-objects' is not supported [-Wignored-optimization-argument]
[1323/1327] Linking CXX executable unittests/Transforms/Scalar/ScalarTests
[1323/1327] Running the LLVM regression tests
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/ld.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/lld-link
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/ld64.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/wasm-ld
-- Testing: 55717 tests, 60 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 
FAIL: LLVM :: Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll (44761 of 55717)
******************** TEST 'LLVM :: Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/opt -passes=loop-vectorize -mtriple riscv64 -mattr=+v,+zvfbfmin -debug-only=loop-vectorize -riscv-v-register-bit-width-lmul=1 -S < /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll 2>&1 | /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/FileCheck /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll
+ /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/opt -passes=loop-vectorize -mtriple riscv64 -mattr=+v,+zvfbfmin -debug-only=loop-vectorize -riscv-v-register-bit-width-lmul=1 -S
+ /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/FileCheck /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll
/var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll:4:16: error: CHECK-LABEL: expected string not found in input
; CHECK-LABEL: add
               ^
<stdin>:1:1: note: scanning from here
opt: Unknown command line argument '-debug-only=loop-vectorize'. Try: '/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/opt --help'
^
<stdin>:1:18: note: possible intended match here
opt: Unknown command line argument '-debug-only=loop-vectorize'. Try: '/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/opt --help'
                 ^

Input file: <stdin>
Check file: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll

-dump-input=help explains the following input dump.

Input was:
<<<<<<
           1: opt: Unknown command line argument '-debug-only=loop-vectorize'. Try: '/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/opt --help' 
label:4'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
label:4'1                      ?                                                                                                                                       possible intended match
           2: opt: Did you mean '--debug-pass=loop-vectorize'? 
label:4'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>>>>

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 
FAIL: LLVM :: Transforms/LoopVectorize/RISCV/reg-usage-f16.ll (44763 of 55717)
******************** TEST 'LLVM :: Transforms/LoopVectorize/RISCV/reg-usage-f16.ll' FAILED ********************
Step 7 (check) failure: check (failure)
...
[1322/1327] Building CXX object unittests/Transforms/Scalar/CMakeFiles/ScalarTests.dir/LoopPassManagerTest.cpp.o
clang++: warning: optimization flag '-ffat-lto-objects' is not supported [-Wignored-optimization-argument]
[1323/1327] Linking CXX executable unittests/Transforms/Scalar/ScalarTests
[1323/1327] Running the LLVM regression tests
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/ld.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using lld-link: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/lld-link
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using ld64.lld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/ld64.lld
llvm-lit: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/utils/lit/lit/llvm/config.py:506: note: using wasm-ld: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/wasm-ld
-- Testing: 55717 tests, 60 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 
FAIL: LLVM :: Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll (44761 of 55717)
******************** TEST 'LLVM :: Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/opt -passes=loop-vectorize -mtriple riscv64 -mattr=+v,+zvfbfmin -debug-only=loop-vectorize -riscv-v-register-bit-width-lmul=1 -S < /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll 2>&1 | /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/FileCheck /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll
+ /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/opt -passes=loop-vectorize -mtriple riscv64 -mattr=+v,+zvfbfmin -debug-only=loop-vectorize -riscv-v-register-bit-width-lmul=1 -S
+ /var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/FileCheck /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll
/var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll:4:16: error: CHECK-LABEL: expected string not found in input
; CHECK-LABEL: add
               ^
<stdin>:1:1: note: scanning from here
opt: Unknown command line argument '-debug-only=loop-vectorize'. Try: '/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/opt --help'
^
<stdin>:1:18: note: possible intended match here
opt: Unknown command line argument '-debug-only=loop-vectorize'. Try: '/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/opt --help'
                 ^

Input file: <stdin>
Check file: /var/lib/buildbot/fuchsia-x86_64-linux/llvm-project/llvm/test/Transforms/LoopVectorize/RISCV/reg-usage-bf16.ll

-dump-input=help explains the following input dump.

Input was:
<<<<<<
           1: opt: Unknown command line argument '-debug-only=loop-vectorize'. Try: '/var/lib/buildbot/fuchsia-x86_64-linux/build/llvm-build-2f042fl1/bin/opt --help' 
label:4'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
label:4'1                      ?                                                                                                                                       possible intended match
           2: opt: Did you mean '--debug-pass=loop-vectorize'? 
label:4'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>>>>

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 
FAIL: LLVM :: Transforms/LoopVectorize/RISCV/reg-usage-f16.ll (44763 of 55717)
******************** TEST 'LLVM :: Transforms/LoopVectorize/RISCV/reg-usage-f16.ll' FAILED ********************

```

</details>

https://github.com/llvm/llvm-project/pull/108370