[clang] [llvm] [AArch64] Enable svcompact intrinsic in streaming mode with SME2.2 (PR #151703)

[Paul Walker via llvm-commits]

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+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu \
+// RUN:   -target-feature +sve -target-feature +sme -target-feature +ssve -target-feature +sme2p2 \
+// RUN:   -fsyntax-only -verify %s
+// REQUIRES: aarch64-registered-target
+// expected-no-diagnostics
+
+
+#include <arm_sve.h>
+
+void test_svcompact_streaming(svbool_t pg, svfloat32_t op) __arm_streaming {
+    svcompact(pg, op);
+}
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paulwalker-arm wrote:

For the Sema testing we normally verify both:
* The builtins are enabled when the target feature is available.
* The compiler emits a diagnostic when the target feature is not available.

See clang/test/Sema/aarch64-sve-intrinsics/acle_sve_bf16.cpp for inspiration, albeit you only care about streaming mode so you can ignore the MODE_ATTR side of things.

https://github.com/llvm/llvm-project/pull/151703