[clang] [Clang][CodeGen] Emit “trap reasons” on UBSan traps (PR #145967)

[Anthony Tran via cfe-commits]

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@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -triple arm64-apple-macosx14.0.0 -O0 -debug-info-kind=standalone -dwarf-version=5 \
+// RUN: -fsanitize=nullability-return -fsanitize-trap=nullability-return -emit-llvm %s -o - | FileCheck %s
+
+#include <stdbool.h>
+#include <stddef.h>
+
+int* _Nonnull nullability_return(bool fail)
+{
+    if (fail)
+        return NULL;
+
+    static int x = 0;
+    return &x;
+}
+
+// CHECK: call void @llvm.ubsantrap(i8 15) {{.*}}!dbg [[LOC:![0-9]+]]
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anthonyhatran wrote:

Added

https://github.com/llvm/llvm-project/pull/145967