[flang-commits] [flang] [mlir][Flang][NFC] Replace use of `vector.insertelement/extractelement` (PR #143272)

[LLVM Continuous Integration via flang-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 `flang` at step 6 "test-build-unified-tree-check-flang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/157/builds/34311

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

```
Step 6 (test-build-unified-tree-check-flang) failure: test (failure)
******************** TEST 'Flang :: Lower/PowerPC/ppc-vec-splat-elem-order.f90' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang -fc1 -flang-experimental-hlfir -emit-llvm /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90 -fno-ppc-native-vector-element-order -triple ppc64le-unknown-linux -o - | /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/FileCheck --check-prefixes="LLVMIR" /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90 # RUN: at line 1
+ /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/FileCheck --check-prefixes=LLVMIR /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90
+ /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang -fc1 -flang-experimental-hlfir -emit-llvm /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90 -fno-ppc-native-vector-element-order -triple ppc64le-unknown-linux -o -
/home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90:22:11: error: LLVMIR: expected string not found in input
! LLVMIR: %[[ele:.*]] = extractelement <16 x i8> %[[x]], i16 15
          ^
<stdin>:18:39: note: scanning from here
 %3 = load <16 x i8>, ptr %0, align 16
                                      ^
<stdin>:18:39: note: with "x" equal to "3"
 %3 = load <16 x i8>, ptr %0, align 16
                                      ^
<stdin>:19:2: note: possible intended match here
 %4 = extractelement <16 x i8> %3, i64 15
 ^

Input file: <stdin>
Check file: /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Lower/PowerPC/ppc-vec-splat-elem-order.f90

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

Input was:
<<<<<<
            .
            .
            .
           13:  ret void 
           14: } 
           15:  
           16: define void @vec_splat_testu8i16_(ptr %0) #0 { 
           17:  %2 = alloca <16 x i8>, i64 1, align 16 
           18:  %3 = load <16 x i8>, ptr %0, align 16 
check:22'0                                           X error: no match found
check:22'1                                             with "x" equal to "3"
           19:  %4 = extractelement <16 x i8> %3, i64 15 
check:22'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
check:22'2      ?                                         possible intended match
           20:  %5 = insertelement <16 x i8> poison, i8 %4, i32 0 
check:22'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           21:  %6 = shufflevector <16 x i8> %5, <16 x i8> poison, <16 x i32> zeroinitializer 
check:22'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           22:  store <16 x i8> %6, ptr %2, align 16 
check:22'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           23:  ret void 
check:22'0     ~~~~~~~~~~
...

```

</details>

https://github.com/llvm/llvm-project/pull/143272