[clang] [llvm] [LLVM][Clang][AArch64] Implement AArch64 build attributes (PR #118771)

[via llvm-commits]

================
@@ -0,0 +1,62 @@
+// RUN: not llvm-mc -triple=aarch64 %s -o %t > %t.out 2>&1
+// RUN: FileCheck --input-file=%t.out --check-prefix=ERR %s 
+
+.aeabi_subsection aeabi_pauthabi, required, uleb128
+.aeabi_attribute Tag_Feature_BTI, 1
+// ERR: error: Unknown AArch64 build attribute 'Tag_Feature_BTI' for subsection 'aeabi_pauthabi'
+// ERR-NEXT: .aeabi_attribute Tag_Feature_BTI, 1
+
+.aeabi_attribute a, 1
+// ERR: Unknown AArch64 build attribute 'a' for subsection 'aeabi_pauthabi'
+// ERR-NEXT: .aeabi_attribute a, 1
+
+.aeabi_attribute Tag_PAuth_Platform, Tag_PAuth_Platform
+// ERR: error: active subsection type is ULEB128 (unsigned), found NTBS (string)
+// ERR-NEXT: .aeabi_attribute Tag_PAuth_Platform, Tag_PAuth_Platform
+
+.aeabi_attribute Tag_PAuth_Platform, a
+// ERR: error: active subsection type is ULEB128 (unsigned), found NTBS (string)
+// ERR-NEXT: .aeabi_attribute Tag_PAuth_Platform, a
+
+.aeabi_attribute Tag_PAuth_Platform,
+// ERR: error: AArch64 build attributes Value not found
+// ERR-NEXT: .aeabi_attribute Tag_PAuth_Platform,
+
+.aeabi_attribute Tag_PAuth_Platform
+// ERR: error: expected comma
+// ERR-NEXT: .aeabi_attribute Tag_PAuth_Platform
+
+.aeabi_attribute
+// ERR: error: AArch64 build attributes Tag not found
+// ERR-NEXT: .aeabi_attribute
+
+.aeabi_subsection aeabi_feature_and_bits, optional, uleb128
+.aeabi_attribute Tag_PAuth_Platform, 1
+// ERR: error: Unknown AArch64 build attribute 'Tag_PAuth_Platform' for subsection 'aeabi_feature_and_bits' 
+// ERR-NEXT: Hint: options are: Tag_Feature_BTI, Tag_Feature_PAC, Tag_Feature_GCS
----------------
sivan-shani wrote:

changing error message to match (removing 'hints')

https://github.com/llvm/llvm-project/pull/118771