[llvm] [LV] Move 3 functions into VPlanTransforms (NFC) (PR #158644)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-expensive-checks-ubuntu` running on `as-builder-4` while building `llvm` at step 7 "test-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/187/builds/12178

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

```
Step 7 (test-check-all) failure: Test just built components: check-all completed (failure)
******************** TEST 'LLVM :: Transforms/LoopVectorize/AArch64/scalable-call.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt -S -passes=loop-vectorize,instcombine -force-vector-interleave=1 -mattr=+sve -mtriple aarch64-unknown-linux-gnu      -prefer-predicate-over-epilogue=scalar-epilogue -pass-remarks-missed=loop-vectorize < /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll 2>/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/test/Transforms/LoopVectorize/AArch64/Output/scalable-call.ll.tmp | /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/FileCheck /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll
# executed command: /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/opt -S -passes=loop-vectorize,instcombine -force-vector-interleave=1 -mattr=+sve -mtriple aarch64-unknown-linux-gnu -prefer-predicate-over-epilogue=scalar-epilogue -pass-remarks-missed=loop-vectorize
# executed command: /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/FileCheck /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll
# RUN: at line 3
cat /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/test/Transforms/LoopVectorize/AArch64/Output/scalable-call.ll.tmp | /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/FileCheck /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll --check-prefix=CHECK-REMARKS
# executed command: cat /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/test/Transforms/LoopVectorize/AArch64/Output/scalable-call.ll.tmp
# executed command: /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/FileCheck /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll --check-prefix=CHECK-REMARKS
# .---command stderr------------
# | /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll:104:23: error: CHECK-REMARKS-NEXT: is not on the line after the previous match
# | ; CHECK-REMARKS-NEXT: t.c:3:10: Recipe with invalid costs prevented vectorization at VF=(vscale x 1): load
# |                       ^
# | <stdin>:10:9: note: 'next' match was here
# | remark: t.c:3:10: Recipe with invalid costs prevented vectorization at VF=(vscale x 1): load
# |         ^
# | <stdin>:6:64: note: previous match ended here
# | remark: <unknown>:0:0: UserVF ignored because of invalid costs.
# |                                                                ^
# | <stdin>:7:1: note: non-matching line after previous match is here
# | Phi-like recipe with different number of operands and predecessors.
# | ^
# | 
# | Input file: <stdin>
# | Check file: /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |           .
# |           .
# |           .
# |           5: Phi-like recipe with different number of operands and predecessors. 
# |           6: remark: <unknown>:0:0: UserVF ignored because of invalid costs. 
# |           7: Phi-like recipe with different number of operands and predecessors. 
# |           8: Phi-like recipe with different number of operands and predecessors. 
# |           9: Phi-like recipe with different number of operands and predecessors. 
# |          10: remark: t.c:3:10: Recipe with invalid costs prevented vectorization at VF=(vscale x 1): load 
# | next:104             !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  error: match on wrong line
# |          11: remark: t.c:3:20: Recipe with invalid costs prevented vectorization at VF=(vscale x 1, vscale x 2): call to llvm.sin 
# |          12: remark: t.c:3:30: Recipe with invalid costs prevented vectorization at VF=(vscale x 1): store 
# |          13: remark: <unknown>:0:0: UserVF ignored because of invalid costs. 
# |          14: Phi-like recipe with different number of operands and predecessors. 
# |          15: Phi-like recipe with different number of operands and predecessors. 
# |           .
...

```

</details>

https://github.com/llvm/llvm-project/pull/158644