[llvm] [LoopVectorize] Use CodeSize as the cost kind for minsize (PR #124119)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `premerge-monolithic-linux` running on `premerge-linux-1` while building `llvm` at step 7 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/153/builds/24095

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

```
Step 7 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: Transforms/LoopVectorize/ARM/optsize_minsize.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 4: /build/buildbot/premerge-monolithic-linux/build/bin/opt -passes=loop-vectorize -S < /build/buildbot/premerge-monolithic-linux/llvm-project/llvm/test/Transforms/LoopVectorize/ARM/optsize_minsize.ll | /build/buildbot/premerge-monolithic-linux/build/bin/FileCheck /build/buildbot/premerge-monolithic-linux/llvm-project/llvm/test/Transforms/LoopVectorize/ARM/optsize_minsize.ll --check-prefix=DEFAULT
+ /build/buildbot/premerge-monolithic-linux/build/bin/opt -passes=loop-vectorize -S
+ /build/buildbot/premerge-monolithic-linux/build/bin/FileCheck /build/buildbot/premerge-monolithic-linux/llvm-project/llvm/test/Transforms/LoopVectorize/ARM/optsize_minsize.ll --check-prefix=DEFAULT
/build/buildbot/premerge-monolithic-linux/llvm-project/llvm/test/Transforms/LoopVectorize/ARM/optsize_minsize.ll:23:17: error: DEFAULT-NEXT: is not on the line after the previous match
; DEFAULT-NEXT: br label %[[VECTOR_BODY:.*]]
                ^
<stdin>:17:2: note: 'next' match was here
 br label %vector.body
 ^
<stdin>:14:11: note: previous match ended here
vector.ph: ; preds = %entry
          ^
<stdin>:15:1: note: non-matching line after previous match is here
 %broadcast.splatinsert = insertelement <4 x i32> poison, i32 %x, i64 0
^

Input file: <stdin>
Check file: /build/buildbot/premerge-monolithic-linux/llvm-project/llvm/test/Transforms/LoopVectorize/ARM/optsize_minsize.ll

-dump-input=help explains the following input dump.

Input was:
<<<<<<
         .
         .
         .
        12:  br i1 false, label %scalar.ph, label %vector.ph 
        13:  
        14: vector.ph: ; preds = %entry 
        15:  %broadcast.splatinsert = insertelement <4 x i32> poison, i32 %x, i64 0 
        16:  %broadcast.splat = shufflevector <4 x i32> %broadcast.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer 
        17:  br label %vector.body 
next:23      !~~~~~~~~~~~~~~~~~~~~  error: match on wrong line
        18:  
        19: vector.body: ; preds = %vector.ph 
        20:  %0 = getelementptr inbounds i32, ptr %p, i64 0 
        21:  %1 = getelementptr inbounds i32, ptr %0, i32 0 
        22:  %wide.load = load <4 x i32>, ptr %1, align 4 
         .
         .
         .
>>>>>>

--

...

```

</details>

https://github.com/llvm/llvm-project/pull/124119