[llvm] [AMDGPU][GlobalISel] Add regbankselect rules for G_FSHR (PR #159818)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-flang-rhel-clang` running on `ppc64le-flang-rhel-test` while building `llvm` at step 3 "clean-build-dir".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/157/builds/42340

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

```
Step 3 (clean-build-dir) failure: Delete failed. (failure) (timed out)
Step 6 (test-build-unified-tree-check-flang) failure: 1200 seconds without output running [b'ninja', b'check-flang'], attempting to kill
...
-- configuring openmp to build Fortran module files using /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang
-- Found Python3: /home/buildbots/llvm-external-buildbots/workers/env/bin/python3.8 (found version "3.8.17") found components: Interpreter Development Development.Module Development.Embed
-- Configuring done (32.9s)
-- Generating done (1.1s)
-- Build files have been written to: /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/runtimes/runtimes-bins
29.063 [2/3/33] Linking CXX executable tools/flang/unittests/Frontend/FlangFrontendTests
48.327 [1/2/34] cd /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/runtimes/runtimes-bins && /home/buildbots/llvm-external-buildbots/cmake-3.31.2/bin/cmake --build /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/runtimes/runtimes-bins/ --target libomp-mod --config Release
ninja: no work to do.
58.002 [1/1/36] Linking CXX executable tools/flang/unittests/Common/FlangCommonTests
58.003 [0/1/36] Running the Flang regression tests
command timed out: 1200 seconds without output running [b'ninja', b'check-flang'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1258.978469
Step 7 (test-build-unified-tree-check-flang-rt) failure: 1200 seconds without output running [b'ninja', b'check-flang-rt'], attempting to kill
...
PASS: flang-rt-Unit :: Runtime/./RuntimeTests/223/248 (243 of 253)
PASS: flang-rt-Unit :: Runtime/./RuntimeTests/220/248 (244 of 253)
PASS: flang-rt-Unit :: Runtime/./RuntimeTests/24/248 (245 of 253)
PASS: flang-rt-Unit :: Runtime/./RuntimeTests/217/248 (246 of 253)
PASS: flang-rt-Unit :: Runtime/./RuntimeTests/216/248 (247 of 253)
PASS: flang-rt-Unit :: Runtime/./RuntimeTests/221/248 (248 of 253)
PASS: flang-rt-Unit :: Runtime/./RuntimeTests/212/248 (249 of 253)
PASS: flang-rt-Unit :: Runtime/./RuntimeTests/213/248 (250 of 253)
PASS: flang-rt-Unit :: Runtime/./RuntimeTests/218/248 (251 of 253)
PASS: flang-rt-Unit :: Runtime/./RuntimeTests/219/248 (252 of 253)
command timed out: 1200 seconds without output running [b'ninja', b'check-flang-rt'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=4620.432444

```

</details>

https://github.com/llvm/llvm-project/pull/159818