[llvm] [LoopVectorize] Enable more early exit vectorisation tests (PR #117008)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-aarch64-darwin` running on `doug-worker-5` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/190/builds/11593

<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 :: Transforms/LoopVectorize/AArch64/simple_early_exit.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/opt -S < /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/simple_early_exit.ll -p loop-vectorize -enable-early-exit-vectorization | /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/FileCheck /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/simple_early_exit.ll --check-prefixes=CHECK
+ /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/FileCheck /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/simple_early_exit.ll --check-prefixes=CHECK
+ /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/opt -S -p loop-vectorize -enable-early-exit-vectorization
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/simple_early_exit.ll:304:15: error: CHECK-NEXT: expected string not found in input
; CHECK-NEXT: [[TMP14:%.*]] = xor <4 x i1> [[TMP13]], splat (i1 true)
              ^
<stdin>:180:49: note: scanning from here
 %13 = icmp eq <4 x i32> %wide.load, %wide.load2
                                                ^
<stdin>:180:49: note: with "TMP13" equal to "%13"
 %13 = icmp eq <4 x i32> %wide.load, %wide.load2
                                                ^
<stdin>:182:33: note: possible intended match here
 %14 = call i1 @llvm.vector.reduce.or.v4i1(<4 x i1> %13)
                                ^
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/simple_early_exit.ll:422:12: error: undefined variable: LOOP0
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
           ^
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/simple_early_exit.ll:422:35: error: undefined variable: LOOP0
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
                                  ^
<stdin>:267:2: note: possible intended match here
!0 = distinct !{!0, !1, !2}
 ^

Input file: <stdin>
Check file: /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/simple_early_exit.ll

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

Input was:
<<<<<<
             1: ; ModuleID = '<stdin>' 
             2: source_filename = "<stdin>" 
             3: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32" 
             4: target triple = "aarch64-unknown-linux-gnu" 
             5:  
             6: %my.struct = type { i8, i8 } 
             7:  
             8: declare void @init_mem(ptr, i64) 
             9:  
            10: ; Function Attrs: vscale_range(1,16) 
            11: define i64 @same_exit_block_pre_inc_use1() #0 { 
label:9'0       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
label:9'1       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
...

```

</details>

https://github.com/llvm/llvm-project/pull/117008