[clang] [flang] [llvm] Re-land: "[AArch64] Add ability to list extensions enabled for a target" (#95805) (PR #96795)

[Jon Roelofs via llvm-commits]

================
@@ -315,37 +315,37 @@
 // RUN: %clang -target aarch64 -mcpu=thunderx2t99 -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-THUNDERX2T99 %s
 // RUN: %clang -target aarch64 -mcpu=a64fx -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-A64FX %s
 // RUN: %clang -target aarch64 -mcpu=carmel -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MCPU-CARMEL %s
-// CHECK-MCPU-APPLE-A7: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+zcm" "-target-feature" "+zcz" "-target-feature" "+v8a" "-target-feature" "+aes"{{.*}} "-target-feature" "+fp-armv8" "-target-feature" "+perfmon" "-target-feature" "+sha2" "-target-feature" "+neon"
----------------
jroelofs wrote:

`// REQUIRES: aarch64-registered-target` up near the top of the file

https://github.com/llvm/llvm-project/pull/96795