[clang] [llvm] [ARM][AArch64] BTI, GCS, PAC Module flag update. (PR #86212)

[Daniil Kovalev via cfe-commits]

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@@ -0,0 +1,86 @@
+;; Test verifies inlining happens cross module when module flags are upgraded.
+;; `foo` and `main` are both old semantic while bar is the new semantic.
+;; Regression test for #82763
+
+; RUN: split-file %s %t
+; RUN: opt -module-summary %t/foo.s -o %t/foo.o
+; RUN: opt -module-summary %t/bar.s -o %t/bar.o
+; RUN: opt -module-summary %t/main.s -o %t/main.o
+; RUN: llvm-lto2 run %t/main.o %t/foo.o %t/bar.o -save-temps \
+; RUN:   -o %t/t.exe \
+; RUN:   -r=%t/foo.o,foo,plx \
+; RUN:   -r=%t/bar.o,bar,plx \
+; RUN:   -r=%t/main.o,foo,l \
+; RUN:   -r=%t/main.o,bar,l \
+; RUN:   -r=%t/main.o,main,plx 2>&1
+; RUN: llvm-dis %t/t.exe.1.4.opt.bc -o - | FileCheck %s
+
+; CHECK:      define dso_local noundef i32 @main() local_unnamed_addr #0 {
+; CHECK-NEXT: entry:
+; CHECK-NEXT:  ret i32 35
+; CHECK-NEXT: }
+
+; CHECK:  attributes #0 = { {{.*}}"branch-target-enforcement" "sign-return-address"="all" "sign-return-address-key"="b_key" }
+
+; CHECK: !llvm.module.flags = !{!0, !1, !2, !3}
+
+; CHECK: !0 = !{i32 8, !"branch-target-enforcement", i32 2}
+; CHECK: !1 = !{i32 8, !"sign-return-address", i32 2}
+; CHECK: !2 = !{i32 8, !"sign-return-address-all", i32 2}
+; CHECK: !3 = !{i32 8, !"sign-return-address-with-bkey", i32 2}
+
+
+;--- foo.s
----------------
kovdan01 wrote:

Nit: maybe foo.ll? Also applies below

https://github.com/llvm/llvm-project/pull/86212