[llvm] Reapply "[AArch64] Wrap integer SCALAR_TO_VECTOR nodes in bitcasts (#172837)" (#183380) (PR #184403)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-rel-x86-64` running on `ml-opt-rel-x86-64-b2` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/185/builds/34850

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: CodeGen/AArch64/clmul.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/b/ml-opt-rel-x86-64-b1/build/bin/llc -mtriple=aarch64-linux-unknown-gnu /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll -o - | /b/ml-opt-rel-x86-64-b1/build/bin/FileCheck /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll --check-prefixes=CHECK,CHECK-NEON
# executed command: /b/ml-opt-rel-x86-64-b1/build/bin/llc -mtriple=aarch64-linux-unknown-gnu /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll -o -
# executed command: /b/ml-opt-rel-x86-64-b1/build/bin/FileCheck /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll --check-prefixes=CHECK,CHECK-NEON
# RUN: at line 3
/b/ml-opt-rel-x86-64-b1/build/bin/llc -mtriple=aarch64-linux-unknown-gnu /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll -o - -mattr=+aes | /b/ml-opt-rel-x86-64-b1/build/bin/FileCheck /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll --check-prefixes=CHECK,CHECK-AES
# executed command: /b/ml-opt-rel-x86-64-b1/build/bin/llc -mtriple=aarch64-linux-unknown-gnu /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll -o - -mattr=+aes
# executed command: /b/ml-opt-rel-x86-64-b1/build/bin/FileCheck /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll --check-prefixes=CHECK,CHECK-AES
# .---command stderr------------
# | /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll:182:19: error: CHECK-AES-NEXT: expected string not found in input
# | ; CHECK-AES-NEXT: fmov s0, w1
# |                   ^
# | <stdin>:38:10: note: scanning from here
# | // %bb.0:
# |          ^
# | <stdin>:39:2: note: possible intended match here
# |  fmov s0, w0
# |  ^
# | /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll:576:19: error: CHECK-AES-NEXT: expected string not found in input
# | ; CHECK-AES-NEXT: fmov s0, w9
# |                   ^
# | <stdin>:87:21: note: scanning from here
# |  and w9, w1, #0xffff
# |                     ^
# | <stdin>:88:2: note: possible intended match here
# |  fmov s0, w8
# |  ^
# | /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll:692:19: error: CHECK-AES-NEXT: expected string not found in input
# | ; CHECK-AES-NEXT: fmov d0, x9
# |                   ^
# | <stdin>:104:12: note: scanning from here
# |  mov w9, w1
# |            ^
# | <stdin>:105:2: note: possible intended match here
# |  fmov d0, x8
# |  ^
# | 
# | Input file: <stdin>
# | Check file: /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/CodeGen/AArch64/clmul.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
...

```

</details>

https://github.com/llvm/llvm-project/pull/184403