Support function attribute patchable_function_entry
This feature is generic. Make it applicable for AArch64 and X86 because
the backend has only implemented NOP insertion for AArch64 and X86.
Reviewed By: nickdesaulniers, aaron.ballman
Differential Revision: https://reviews.llvm.org/D72221
diff --git a/clang/test/Sema/patchable-function-entry-attr.c b/clang/test/Sema/patchable-function-entry-attr.c
new file mode 100644
index 0000000..f807bd4
--- /dev/null
+++ b/clang/test/Sema/patchable-function-entry-attr.c
@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -triple aarch64 -fsyntax-only -verify %s
+
+// expected-error@+1 {{'patchable_function_entry' attribute takes at least 1 argument}}
+__attribute__((patchable_function_entry)) void f();
+
+// expected-error@+1 {{'patchable_function_entry' attribute takes no more than 2 arguments}}
+__attribute__((patchable_function_entry(0, 0, 0))) void f();
+
+// expected-error@+1 {{'patchable_function_entry' attribute requires a non-negative integral compile time constant expression}}
+__attribute__((patchable_function_entry(-1))) void f();
+
+int i;
+// expected-error@+1 {{'patchable_function_entry' attribute requires parameter 0 to be an integer constant}}
+__attribute__((patchable_function_entry(i))) void f();
+
+// expected-error@+1 {{'patchable_function_entry' attribute requires integer constant between 0 and 0 inclusive}}
+__attribute__((patchable_function_entry(1, 1))) void f();
