1 files changed, 104 insertions, 0 deletions
diff --git a/tests/codegen/asm-options.rs b/tests/codegen/asm-options.rs
new file mode 100644
index 000000000..963b60cfe
--- /dev/null
+++ b/tests/codegen/asm-options.rs
@@ -0,0 +1,104 @@
+// compile-flags: -O
+// only-x86_64
+
+#![crate_type = "rlib"]
+
+use std::arch::asm;
+
+// CHECK-LABEL: @pure
+// CHECK-NOT: asm
+// CHECK: ret void
+#[no_mangle]
+pub unsafe fn pure(x: i32) {
+    let y: i32;
+    asm!("", out("ax") y, in("cx") x, options(pure, nomem));
+}
+
+// CHECK-LABEL: @noreturn
+// CHECK: call void asm
+// CHECK-NEXT: unreachable
+#[no_mangle]
+pub unsafe fn noreturn() {
+    asm!("", options(noreturn));
+}
+
+pub static mut VAR: i32 = 0;
+pub static mut DUMMY_OUTPUT: i32 = 0;
+
+// CHECK-LABEL: @readonly
+// CHECK: call i32 asm
+// CHECK: ret i32 1
+#[no_mangle]
+pub unsafe fn readonly() -> i32 {
+    VAR = 1;
+    asm!("", out("ax") DUMMY_OUTPUT, options(pure, readonly));
+    VAR
+}
+
+// CHECK-LABEL: @not_readonly
+// CHECK: call i32 asm
+// CHECK: ret i32 %
+#[no_mangle]
+pub unsafe fn not_readonly() -> i32 {
+    VAR = 1;
+    asm!("", out("ax") DUMMY_OUTPUT, options());
+    VAR
+}
+
+// CHECK-LABEL: @nomem
+// CHECK-NOT: store
+// CHECK: call i32 asm
+// CHECK: store
+// CHECK: ret i32 2
+#[no_mangle]
+pub unsafe fn nomem() -> i32 {
+    VAR = 1;
+    asm!("", out("ax") DUMMY_OUTPUT, options(pure, nomem));
+    VAR = 2;
+    VAR
+}
+
+// CHECK-LABEL: @nomem_nopure
+// CHECK-NOT: store
+// CHECK: call i32 asm
+// CHECK: store
+// CHECK: ret i32 2
+#[no_mangle]
+pub unsafe fn nomem_nopure() -> i32 {
+    VAR = 1;
+    asm!("", out("ax") DUMMY_OUTPUT, options(nomem));
+    VAR = 2;
+    VAR
+}
+
+// CHECK-LABEL: @not_nomem
+// CHECK: store
+// CHECK: call i32 asm
+// CHECK: store
+// CHECK: ret i32 2
+#[no_mangle]
+pub unsafe fn not_nomem() -> i32 {
+    VAR = 1;
+    asm!("", out("ax") DUMMY_OUTPUT, options(pure, readonly));
+    VAR = 2;
+    VAR
+}
+
+// CHECK-LABEL: @dont_remove_nonpure
+// CHECK: call void asm
+// CHECK: call void asm
+// CHECK: call void asm
+// CHECK: ret void
+#[no_mangle]
+pub unsafe fn dont_remove_nonpure() {
+    asm!("", options());
+    asm!("", options(nomem));
+    asm!("", options(readonly));
+}
+
+// CHECK-LABEL: @raw
+// CHECK: call void asm sideeffect inteldialect "{} {}", ""()
+#[no_mangle]
+pub unsafe fn raw() {
+    asm!("{} {}", options(nostack, nomem, preserves_flags, raw));
+}