[clang] [llvm] [AArch64TargetParser]Fix reconstructFromParsedFeatures ignoring negative features (PR #142236)

[Matthias Braun via llvm-commits]

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@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -triple aarch64-- -target-feature +neon -target-feature +sve\
+// RUN:   -target-feature -sve -emit-llvm %s -o - | FileCheck %s
+
+// Reproducer for bug where clang would reject always_inline for unrelated
+// target features if they were disable with `-feature` on the command line.
+// CHECK: @bar
+__attribute__((always_inline)) __attribute__((target("neon"))) void foo() {}
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MatzeB wrote:

The `__attribute__((target("neon")))` comes originally from the `arm_neon.h` header shipping with clang where this is used all over.

https://github.com/llvm/llvm-project/pull/142236