[clang] [AArch64][PAC][clang][ELF] Support PAuth ABI core info (PR #85235)

[Daniil Kovalev via cfe-commits]

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@@ -1,5 +1,37 @@
+// RUN: %clang -### -c --target=aarch64 %s 2>&1 | FileCheck %s --check-prefix NONE
+// NONE: "-cc1"
+// NONE-NOT: "-fptrauth-
+
 // RUN: %clang -### -c --target=aarch64 -fno-ptrauth-intrinsics -fptrauth-intrinsics %s 2>&1 | FileCheck %s --check-prefix=INTRIN
 // INTRIN: "-cc1"{{.*}} "-fptrauth-intrinsics"
 
-// RUN: not %clang -### -c --target=x86_64 -fptrauth-intrinsics %s 2>&1 | FileCheck %s --check-prefix=ERR
-// ERR: error: unsupported option '-fptrauth-intrinsics' for target '{{.*}}'
+// RUN: %clang -### -c --target=aarch64 -fno-ptrauth-calls -fptrauth-calls %s 2>&1 | FileCheck %s --check-prefix=CALL
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kovdan01 wrote:

I've measured timings on my machine, and we can potentially save about 0.1s if combine some of the RUN lines. It's noticeable, but there are tests like aarch64-fixed-x-register.c which contain a lot more similar RUN lines which can also be combined and we could save even more if enhance them.

I suggest to merge this PR "as is" and probably submitting a subsequent PR which makes this test and some similar ones "lighter" if it's a big concern. As for me, keeping all the RUN lines can protect us from dummy typos and they probably are worth the time spent on them - but I don't mind combining the RUN lines if the extra overhead bothers many people.

Please let me know if this approach is OK for you and I can merge the PR. If the clang driver test timings look too bad, I can also submit a corresponding issue so the context of the discussion is not lost.



https://github.com/llvm/llvm-project/pull/85235