[llvm] [TLI] Add basic support for scalbnxx (PR #112936)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-sve-vls-2stage` running on `linaro-g3-01` while building `llvm` at step 12 "ninja check 2".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/4/builds/2979

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

```
Step 12 (ninja check 2) failure: stage 2 checked (failure)
******************** TEST 'HWAddressSanitizer-aarch64 :: TestCases/hwasan_symbolize_stack_overflow.cpp' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: rm -rf /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp; mkdir /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp
+ rm -rf /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp
+ mkdir /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp
RUN: at line 2: /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/./bin/clang    -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta   -gline-tables-only -fsanitize=hwaddress -fuse-ld=lld -mllvm -hwasan-globals -mllvm -hwasan-use-short-granules -mllvm -hwasan-instrument-landing-pads=0 -mllvm -hwasan-instrument-personality-functions -Wl,--build-id -g /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp -o /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow
+ /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/./bin/clang -Wthread-safety -Wthread-safety-reference -Wthread-safety-beta -gline-tables-only -fsanitize=hwaddress -fuse-ld=lld -mllvm -hwasan-globals -mllvm -hwasan-use-short-granules -mllvm -hwasan-instrument-landing-pads=0 -mllvm -hwasan-instrument-personality-functions -Wl,--build-id -g /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp -o /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow
RUN: at line 3: env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not  /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow 16 2>&1 | hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,AFTER0
+ env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow 16
+ FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,AFTER0
+ hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index
Could not find symbols for lib/aarch64-linux-gnu/libc.so.6
RUN: at line 4: env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not  /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow 17 2>&1 | hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,AFTER1
+ env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow 17
+ hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index
+ FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,AFTER1
Could not find symbols for lib/aarch64-linux-gnu/libc.so.6
RUN: at line 5: env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not  /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow -1 2>&1 | hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,BEFORE1
+ env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow -1
+ hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index
+ FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,BEFORE1
Could not find symbols for lib/aarch64-linux-gnu/libc.so.6
RUN: at line 6: env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not  /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow -17 2>&1 | hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,BEFORE17
+ env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow -17
+ hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index
+ FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,BEFORE17
Could not find symbols for lib/aarch64-linux-gnu/libc.so.6
RUN: at line 7: env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not  /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow 1016 2>&1 | hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,AFTER1000
+ env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow 1016
+ hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index
+ FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,AFTER1000
Could not find symbols for lib/aarch64-linux-gnu/libc.so.6
RUN: at line 8: env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not  /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow -1000 2>&1 | hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index | FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,BEFORE1000
+ env HWASAN_OPTIONS=disable_allocator_tagging=1:random_tags=0:fail_without_syscall_abi=0:symbolize=0 not /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp/hwasan_overflow -1000
+ hwasan_symbolize --symbols /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/runtimes/runtimes-bins/compiler-rt/test/hwasan/AARCH64/TestCases/Output/hwasan_symbolize_stack_overflow.cpp.tmp --index
+ FileCheck /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp --check-prefixes=CHECK,BEFORE1000
Could not find symbols for lib/aarch64-linux-gnu/libc.so.6
/home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/compiler-rt/test/hwasan/TestCases/hwasan_symbolize_stack_overflow.cpp:21:12: error: CHECK: expected string not found in input
 // CHECK: Potentially referenced stack object:
           ^
<stdin>:1:1: note: scanning from here
==1330869==ERROR: HWAddressSanitizer: tag-mismatch on address 0xffffdc6ffd58 at pc 0xc3cfa392a30c
^
<stdin>:10:15: note: possible intended match here
Address 0xffffdc6ffd58 is located in stack of thread T0
              ^

...

```

</details>

https://github.com/llvm/llvm-project/pull/112936