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-rw-r--r--src/test/codegen/asm-multiple-options.rs54
1 files changed, 54 insertions, 0 deletions
diff --git a/src/test/codegen/asm-multiple-options.rs b/src/test/codegen/asm-multiple-options.rs
new file mode 100644
index 000000000..1ae37d627
--- /dev/null
+++ b/src/test/codegen/asm-multiple-options.rs
@@ -0,0 +1,54 @@
+// 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), options(nomem));
+}
+
+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), options(readonly));
+ 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), 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), options(readonly));
+ VAR = 2;
+ VAR
+}