[llvm] [RISCV] Fix crash costing cttz.elts with zvl32b. (PR #226181)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `bolt-aarch64-ubuntu-nfc` running on `bolt-worker-aarch64` while building `llvm` at step 15 "nfc-test check-bolt".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/217/builds/21444

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

```
Step 15 (nfc-test check-bolt) failure: NFC check-bolt completed (failure)
...
PASS: BOLT :: AArch64/cfi-state-list.test (767 of 777)
PASS: BOLT :: AArch64/dw_cfa_gnu_window_save.test (768 of 777)
PASS: BOLT :: X86/dwarf5-df-main-debug-names-ftu-ltu-mix.test (769 of 777)
PASS: BOLT :: AArch64/lite-mode.s (770 of 777)
PASS: BOLT :: AArch64/long-jmp-one-stub.s (771 of 777)
PASS: BOLT :: AArch64/compare-and-branch-unsupported.S (772 of 777)
PASS: BOLT :: AArch64/veneer-lite-mode.s (773 of 777)
PASS: BOLT :: AArch64/relax-cross-fragment-calls.s (774 of 777)
PASS: BOLT :: AArch64/veneer-lld-abs.s (775 of 777)
TIMEOUT: BOLT :: AArch64/relax-calls.s (776 of 777)
******************** TEST 'BOLT :: AArch64/relax-calls.s' FAILED ********************
Exit Code: -9
Timeout: Reached timeout of 60 seconds

Command Output (stdout):
--
# RUN: at line 5
/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/llvm-mc -filetype=obj -triple aarch64-unknown-unknown /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/bolt/test/AArch64/relax-calls.s -o /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.o
# executed command: /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/llvm-mc -filetype=obj -triple aarch64-unknown-unknown /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/bolt/test/AArch64/relax-calls.s -o /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.o
# note: command had no output on stdout or stderr
# RUN: at line 6
/usr/bin/python3 /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/bolt/test/link_fdata.py /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/bolt/test/AArch64/relax-calls.s /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.o /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.fdata
# executed command: /usr/bin/python3 /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/bolt/test/link_fdata.py /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/bolt/test/AArch64/relax-calls.s /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.o /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.fdata
# note: command had no output on stdout or stderr
# RUN: at line 7
/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/llvm-strip --strip-unneeded /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.o
# executed command: /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/llvm-strip --strip-unneeded /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.o
# note: command had no output on stdout or stderr
# RUN: at line 8
/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/clang  --target=aarch64-unknown-linux-gnu -fPIE -fuse-ld=lld -Wl,--unresolved-symbols=ignore-all -Wl,--build-id=none -pie -mllvm -x86-asm-syntax=att --target=aarch64-unknown-linux-gnu -nostartfiles -nostdlib -ffreestanding -Wl,-z,defs /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.o -o /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.exe -nostdlib -Wl,-q
# executed command: /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/clang --target=aarch64-unknown-linux-gnu -fPIE -fuse-ld=lld -Wl,--unresolved-symbols=ignore-all -Wl,--build-id=none -pie -mllvm -x86-asm-syntax=att --target=aarch64-unknown-linux-gnu -nostartfiles -nostdlib -ffreestanding -Wl,-z,defs /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.o -o /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.exe -nostdlib -Wl,-q
# .---command stderr------------
# | clang: warning: argument unused during compilation: '-mllvm -x86-asm-syntax=att' [-Wunused-command-line-argument]
# `-----------------------------
# RUN: at line 9
/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/llvm-bolt --runtime-instrumentation-lib=/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/bolt_rt-bins/lib/libbolt_rt_instr.a --runtime-hugify-lib=/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/bolt_rt-bins/lib/libbolt_rt_hugify.a /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.exe -o /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.bolt --relax-exp --lite=1 --data /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.fdata    --print-normalized 2>&1 | /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/FileCheck /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/bolt/test/AArch64/relax-calls.s --check-prefix=CHECK-BOLT-LITE
# executed command: /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/llvm-bolt --runtime-instrumentation-lib=/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/bolt_rt-bins/lib/libbolt_rt_instr.a --runtime-hugify-lib=/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/bolt_rt-bins/lib/libbolt_rt_hugify.a /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.exe -o /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.bolt --relax-exp --lite=1 --data /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.fdata --print-normalized
# note: command had no output on stdout or stderr
# executed command: /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/FileCheck /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/bolt/test/AArch64/relax-calls.s --check-prefix=CHECK-BOLT-LITE
# note: command had no output on stdout or stderr
# RUN: at line 11
/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/llvm-bolt --runtime-instrumentation-lib=/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/bolt_rt-bins/lib/libbolt_rt_instr.a --runtime-hugify-lib=/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/bolt_rt-bins/lib/libbolt_rt_hugify.a /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.exe -o /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.bolt --relax-exp --lite=0 --data /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.fdata    | /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/FileCheck /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/bolt/test/AArch64/relax-calls.s --check-prefix=CHECK-BOLT
# executed command: /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/llvm-bolt --runtime-instrumentation-lib=/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/bolt_rt-bins/lib/libbolt_rt_instr.a --runtime-hugify-lib=/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/bolt_rt-bins/lib/libbolt_rt_hugify.a /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.exe -o /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.bolt --relax-exp --lite=0 --data /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/tools/bolt/test/AArch64/Output/relax-calls.s.tmp.fdata
# .---command stderr------------
# | BOLT-INFO: no .got section found
# `-----------------------------
# executed command: /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/bin/FileCheck /home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/bolt/test/AArch64/relax-calls.s --check-prefix=CHECK-BOLT
# note: command had no output on stdout or stderr
# RUN: at line 13

```

</details>

https://github.com/llvm/llvm-project/pull/226181