[llvm] [SLP][REVEC] When ScalarTy is FixedVectorType, the insertion index should consider the number of elements of ScalarTy. (PR #114526)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-darwin` running on `doug-worker-3` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/23/builds/4387

<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 :: ExecutionEngine/OrcLazy/multiple-compile-threads-basic.ll' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 1: /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/lli -jit-kind=orc-lazy -compile-threads=2 -thread-entry hello /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/ExecutionEngine/OrcLazy/multiple-compile-threads-basic.ll | /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/FileCheck /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/ExecutionEngine/OrcLazy/multiple-compile-threads-basic.ll
+ /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/lli -jit-kind=orc-lazy -compile-threads=2 -thread-entry hello /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/ExecutionEngine/OrcLazy/multiple-compile-threads-basic.ll
+ /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/FileCheck /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/ExecutionEngine/OrcLazy/multiple-compile-threads-basic.ll
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/lli -jit-kind=orc-lazy -compile-threads=2 -thread-entry hello /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/ExecutionEngine/OrcLazy/multiple-compile-threads-basic.ll
 #0 0x00000001044d84a8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/lli+0x1010534a8)
 #1 0x00000001044d6268 llvm::sys::RunSignalHandlers() (/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/lli+0x101051268)
 #2 0x00000001044d8b77 SignalHandler(int) (/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/lli+0x101053b77)
 #3 0x00007ff81a873fdd (/usr/lib/system/libsystem_platform.dylib+0x7ff80046afdd)
 #4 0x00007ff7bca77d18 
 #5 0x00007ff81a7ff34a (/usr/lib/libc++abi.dylib+0x7ff8003f634a)
 #6 0x0000000104025c54 (anonymous namespace)::GenericLLVMIRPlatformSupport::deinitialize(llvm::orc::JITDylib&) (/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/lli+0x100ba0c54)
 #7 0x000000010348ff29 llvm::orc::LLJIT::deinitialize(llvm::orc::JITDylib&) (/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/lli+0x10000af29)
 #8 0x000000010348d4ab runOrcJIT(char const*) (/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/lli+0x1000084ab)
 #9 0x0000000103487b69 main (/Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/lli+0x100002b69)
#10 0x00007ff81a4b9345 
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/bin/FileCheck /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/llvm/test/ExecutionEngine/OrcLazy/multiple-compile-threads-basic.ll

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/114526