--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/Sema/riscv-interrupt-attr.c	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,62 @@
+// RUN: %clang_cc1 -triple riscv32-unknown-elf -emit-llvm -DCHECK_IR < %s| FileCheck %s
+// RUN: %clang_cc1 -triple riscv64-unknown-elf -emit-llvm -DCHECK_IR < %s| FileCheck %s
+// RUN: %clang_cc1 %s -triple riscv32-unknown-elf -verify -fsyntax-only
+// RUN: %clang_cc1 %s -triple riscv64-unknown-elf -verify -fsyntax-only
+
+#if defined(CHECK_IR)
+// CHECK-LABEL:  @foo_user() #0
+// CHECK: ret void
+__attribute__((interrupt("user"))) void foo_user(void) {}
+// CHECK-LABEL:  @foo_supervisor() #1
+// CHECK: ret void
+__attribute__((interrupt("supervisor"))) void foo_supervisor(void) {}
+// CHECK-LABEL:  @foo_machine() #2
+// CHECK: ret void
+__attribute__((interrupt("machine"))) void foo_machine(void) {}
+// CHECK-LABEL:  @foo_default() #2
+// CHECK: ret void
+__attribute__((interrupt())) void foo_default(void) {}
+// CHECK-LABEL:  @foo_default2() #2
+// CHECK: ret void
+__attribute__((interrupt())) void foo_default2(void) {}
+// CHECK: attributes #0
+// CHECK: "interrupt"="user"
+// CHECK: attributes #1
+// CHECK: "interrupt"="supervisor"
+// CHECK: attributes #2
+// CHECK: "interrupt"="machine"
+#else
+struct a { int b; };
+
+struct a test __attribute__((interrupt)); // expected-warning {{'interrupt' attribute only applies to functions}}
+
+__attribute__((interrupt("USER"))) void foo1(void) {} // expected-warning {{'interrupt' attribute argument not supported: USER}}
+
+__attribute__((interrupt("user", 1))) void foo2(void) {} // expected-error {{'interrupt' attribute takes no more than 1 argument}}
+
+__attribute__((interrupt)) int foo3(void) {return 0;} // expected-warning {{RISC-V 'interrupt' attribute only applies to functions that have a 'void' return type}}
+
+__attribute__((interrupt())) void foo4();
+__attribute__((interrupt())) void foo4() {};
+
+__attribute__((interrupt())) void foo5(int a) {} // expected-warning {{RISC-V 'interrupt' attribute only applies to functions that have no parameters}}
+
+__attribute__((interrupt("user"), interrupt("supervisor"))) void foo6(void) {} // expected-warning {{repeated RISC-V 'interrupt' attribute}} \
+  // expected-note {{repeated RISC-V 'interrupt' attribute is here}}
+
+__attribute__((interrupt, interrupt)) void foo7(void) {} // expected-warning {{repeated RISC-V 'interrupt' attribute}} \
+                                                     // expected-note {{repeated RISC-V 'interrupt' attribute is here}}
+
+__attribute__((interrupt(""))) void foo8(void) {} // expected-warning {{'interrupt' attribute argument not supported}}
+
+__attribute__((interrupt("user"))) void foo9(void);
+__attribute__((interrupt("supervisor"))) void foo9(void);
+__attribute__((interrupt("machine"))) void foo9(void);
+
+__attribute__((interrupt("user"))) void foo10(void) {}
+__attribute__((interrupt("supervisor"))) void foo11(void) {}
+__attribute__((interrupt("machine"))) void foo12(void) {}
+__attribute__((interrupt())) void foo13(void) {}
+__attribute__((interrupt)) void foo14(void) {}
+#endif
+