[clang] [llvm] [Clang][LLVM][AArch64] Add intrinsic for LUTI4 SME2 instruction (PR #97755)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-x86_64-debian-dylib` running on `gribozavr4` while building `clang,llvm` at step 6 "test-build-unified-tree-check-clang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/60/builds/8580

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

```
Step 6 (test-build-unified-tree-check-clang) failure: test (failure)
******************** TEST 'Clang :: CodeGen/aarch64-sme2-intrinsics/acle_sme2_luti4_zt.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: /b/1/llvm-x86_64-debian-dylib/build/bin/clang -cc1 -internal-isystem /b/1/llvm-x86_64-debian-dylib/build/lib/clang/20/include -nostdsysteminc  -triple aarch64-none-linux-gnu -target-feature +bf16 -target-feature +sme -target-feature +sme2 -target-feature +sme-lutv2 -O2 -Werror -Wall -emit-llvm -o - /b/1/llvm-x86_64-debian-dylib/llvm-project/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_luti4_zt.c | /b/1/llvm-x86_64-debian-dylib/build/bin/FileCheck /b/1/llvm-x86_64-debian-dylib/llvm-project/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_luti4_zt.c
+ /b/1/llvm-x86_64-debian-dylib/build/bin/clang -cc1 -internal-isystem /b/1/llvm-x86_64-debian-dylib/build/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +bf16 -target-feature +sme -target-feature +sme2 -target-feature +sme-lutv2 -O2 -Werror -Wall -emit-llvm -o - /b/1/llvm-x86_64-debian-dylib/llvm-project/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_luti4_zt.c
+ /b/1/llvm-x86_64-debian-dylib/build/bin/FileCheck /b/1/llvm-x86_64-debian-dylib/llvm-project/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_luti4_zt.c
/b/1/llvm-x86_64-debian-dylib/llvm-project/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_luti4_zt.c:12:17: error: CHECK-LABEL: expected string not found in input
// CHECK-LABEL: define dso_local <vscale x 64 x i8> @test_luti4_zt_u8_x4(
                ^
<stdin>:1:1: note: scanning from here
; ModuleID = '/b/1/llvm-x86_64-debian-dylib/llvm-project/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_luti4_zt.c'
^
<stdin>:7:65: note: possible intended match here
define dso_local { <vscale x 16 x i8>, <vscale x 16 x i8>, <vscale x 16 x i8>, <vscale x 16 x i8> } @test_luti4_zt_u8_x4(<vscale x 16 x i8> %op.coerce0, <vscale x 16 x i8> %op.coerce1) local_unnamed_addr #0 {
                                                                ^

Input file: <stdin>
Check file: /b/1/llvm-x86_64-debian-dylib/llvm-project/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_luti4_zt.c

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

Input was:
<<<<<<
            1: ; ModuleID = '/b/1/llvm-x86_64-debian-dylib/llvm-project/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_luti4_zt.c' 
label:12'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
            2: source_filename = "/b/1/llvm-x86_64-debian-dylib/llvm-project/clang/test/CodeGen/aarch64-sme2-intrinsics/acle_sme2_luti4_zt.c" 
label:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            3: target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32" 
label:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            4: target triple = "aarch64-none-linux-gnu" 
label:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            5:  
label:12'0     ~
            6: ; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn 
label:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            7: define dso_local { <vscale x 16 x i8>, <vscale x 16 x i8>, <vscale x 16 x i8>, <vscale x 16 x i8> } @test_luti4_zt_u8_x4(<vscale x 16 x i8> %op.coerce0, <vscale x 16 x i8> %op.coerce1) local_unnamed_addr #0 { 
label:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
label:12'1                                                                     ?                                                                                                                                                 possible intended match
            8: entry: 
label:12'0     ~~~~~~~
            9:  %retval = alloca { <vscale x 16 x i8>, <vscale x 16 x i8>, <vscale x 16 x i8>, <vscale x 16 x i8> }, align 16 
label:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           10:  %0 = tail call { <vscale x 16 x i8>, <vscale x 16 x i8>, <vscale x 16 x i8>, <vscale x 16 x i8> } @llvm.aarch64.sme.luti4.zt.x4.nxv16i8(i32 0, <vscale x 16 x i8> %op.coerce0, <vscale x 16 x i8> %op.coerce1) 
label:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           11:  %1 = extractvalue { <vscale x 16 x i8>, <vscale x 16 x i8>, <vscale x 16 x i8>, <vscale x 16 x i8> } %0, 0 
label:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           12:  %2 = tail call <vscale x 64 x i8> @llvm.vector.insert.nxv64i8.nxv16i8(<vscale x 64 x i8> poison, <vscale x 16 x i8> %1, i64 0) 
label:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
...

```

</details>

https://github.com/llvm/llvm-project/pull/97755