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

[Tomas Matheson 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
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tmatheson-arm wrote:

The driver should never emit a `-cc1` command line with `-target-feature +sve -target-feature -sve`, so I don't think this is a valid way to test whatever the problem is.

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