[llvm] [llvm][ARM][AArch64] Add attributes to synthetic functions. (PR #83153)

[Tomas Matheson via llvm-commits]

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@@ -0,0 +1,31 @@
+; RUN: opt < %s -passes=asan -S | FileCheck %s
+; REQUIRES: aarch64-registered-target
+
+target triple = "aarch64-unknown-linux-gnu"
+
+ at g = dso_local global i32 0, align 4
+
+define i32 @test_load() sanitize_address {
+entry:
+  %tmp = load i32, ptr @g, align 4
+  ret i32 %tmp
+}
+
+!llvm.module.flags = !{!0, !1}
+
+;; Due to -fasynchronous-unwind-tables.
+!0 = !{i32 7, !"uwtable", i32 2}
+
+;; Due to -fno-omit-frame-pointer.
+!1 = !{i32 7, !"frame-pointer", i32 2}
+
+!llvm.module.flags = !{!2, !3, !4}
+
+!2 = !{i32 8, !"branch-target-enforcement", i32 1}
+!3 = !{i32 8, !"sign-return-address", i32 1}
+!4 = !{i32 8, !"sign-return-address-all", i32 0}
+
+;; Set the uwtable attribute on ctor/dtor.
+; CHECK: define internal void @asan.module_ctor() #[[#ATTR:]]
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tmatheson-arm wrote:

Won't `[[#ATTR:]]` match an empty string?

https://github.com/llvm/llvm-project/pull/83153