[llvm] [test][PAC][AArch64] Add ELF tests for subtarget-neutral codegen (PR #98020)

[Daniil Kovalev via llvm-commits]

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@@ -1,101 +1,128 @@
-; RUN: llc -mtriple arm64e-apple-darwin -mattr=+bti              -asm-verbose=false -o - %s | FileCheck %s
-; RUN: llc -mtriple arm64e-apple-darwin -mattr=+bti -global-isel -asm-verbose=false -o - %s | FileCheck %s
-; RUN: llc -mtriple arm64e-apple-darwin -mattr=+bti -fast-isel   -asm-verbose=false -o - %s | FileCheck %s
+; RUN: llc -mtriple arm64e-apple-darwin -mattr=+bti              -asm-verbose=false \
+; RUN:   -o - %s | FileCheck %s --check-prefixes=DARWIN,CHECK
+; RUN: llc -mtriple arm64e-apple-darwin -mattr=+bti -global-isel -asm-verbose=false \
+; RUN:   -o - %s | FileCheck %s --check-prefixes=DARWIN,CHECK
+; RUN: llc -mtriple arm64e-apple-darwin -mattr=+bti -fast-isel   -asm-verbose=false \
+; RUN:   -o - %s | FileCheck %s --check-prefixes=DARWIN,CHECK
+; RUN: llc -mtriple aarch64-linux-gnu   -mattr=+bti -mattr=+pauth              -asm-verbose=false \
+; RUN:   -o - %s | FileCheck %s --check-prefixes=ELF,CHECK
+; RUN: llc -mtriple aarch64-linux-gnu   -mattr=+bti -mattr=+pauth -global-isel -asm-verbose=false \
+; RUN:   -o - %s | FileCheck %s --check-prefixes=ELF,CHECK
+; RUN: llc -mtriple aarch64-linux-gnu   -mattr=+bti -mattr=+pauth -fast-isel   -asm-verbose=false \
+; RUN:   -o - %s | FileCheck %s --check-prefixes=ELF,CHECK
 
-; ptrauth tail-calls can only use x16/x17 with BTI.
+;; ptrauth tail-calls can only use x16/x17 with BTI.
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kovdan01 wrote:

It looks like that new tests use a convention: for "special" lines like RUN, CHECK, etc, use ';' prefix, and for "actual comments" - use ';;' prefix. I've not found this in official guidelines, but it's clear from existing tests and I also feel that there were PRs where this was discussed.

If the verb in the question is **need**, then no, we don't need that, it's just a cosmetic change.

https://github.com/llvm/llvm-project/pull/98020