[clang] [llvm] [AArch64] Implement intrinsics for SME2 FSCALE (PR #100128)

[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-4` while building `clang,llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/190/builds/6495

<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 'Clang :: CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 3: /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Users/buildbot/buildbot-root/aarch64-darwin/build/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +sme -target-feature +sme2 -target-feature +fp8 -disable-O0-optnone -Werror -Wall -emit-llvm -o - /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c | /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/opt -S -passes=mem2reg,tailcallelim | /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/FileCheck /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c
+ /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Users/buildbot/buildbot-root/aarch64-darwin/build/lib/clang/20/include -nostdsysteminc -triple aarch64-none-linux-gnu -target-feature +sme -target-feature +sme2 -target-feature +fp8 -disable-O0-optnone -Werror -Wall -emit-llvm -o - /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c
+ /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/FileCheck /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c
+ /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/opt -S -passes=mem2reg,tailcallelim
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c:21:16: error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: [[TMP0:%.*]] = tail call <vscale x 8 x half> @llvm.vector.extract.nxv8f16.nxv16f16(<vscale x 16 x half> [[OP1:%.*]], i64 0)
               ^
<stdin>:8:7: note: scanning from here
entry:
      ^
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c:48:16: error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: [[TMP0:%.*]] = tail call <vscale x 4 x float> @llvm.vector.extract.nxv4f32.nxv8f32(<vscale x 8 x float> [[OP1:%.*]], i64 0)
               ^
<stdin>:22:7: note: scanning from here
entry:
      ^
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c:75:16: error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: [[TMP0:%.*]] = tail call <vscale x 2 x double> @llvm.vector.extract.nxv2f64.nxv4f64(<vscale x 4 x double> [[OP1:%.*]], i64 0)
               ^
<stdin>:36:7: note: scanning from here
entry:
      ^
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c:103:16: error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: [[TMP0:%.*]] = tail call <vscale x 8 x half> @llvm.vector.extract.nxv8f16.nxv32f16(<vscale x 32 x half> [[OP1:%.*]], i64 0)
               ^
<stdin>:50:7: note: scanning from here
entry:
      ^
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c:142:16: error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: [[TMP0:%.*]] = tail call <vscale x 4 x float> @llvm.vector.extract.nxv4f32.nxv16f32(<vscale x 16 x float> [[OP1:%.*]], i64 0)
               ^
<stdin>:68:7: note: scanning from here
entry:
      ^
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c:181:16: error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: [[TMP0:%.*]] = tail call <vscale x 2 x double> @llvm.vector.extract.nxv2f64.nxv8f64(<vscale x 8 x double> [[OP1:%.*]], i64 0)
               ^
<stdin>:86:7: note: scanning from here
entry:
      ^
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/clang/test/CodeGen/aarch64-fp8-intrinsics/acle_sme2_fp8_scale.c:221:16: error: CHECK-NEXT: expected string not found in input
// CHECK-NEXT: [[TMP0:%.*]] = tail call <vscale x 8 x half> @llvm.vector.extract.nxv8f16.nxv16f16(<vscale x 16 x half> [[OP1:%.*]], i64 0)
               ^
<stdin>:104:7: note: scanning from here
entry:
...

```

</details>

https://github.com/llvm/llvm-project/pull/100128