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//@ compile-flags: -O
//@ only-x86_64
#![crate_type = "rlib"]
#![feature(asm_goto)]
use std::arch::asm;
#[no_mangle]
pub extern "C" fn panicky() {}
struct Foo;
impl Drop for Foo {
fn drop(&mut self) {
println!();
}
}
// CHECK-LABEL: @asm_goto
#[no_mangle]
pub unsafe fn asm_goto() {
// CHECK: callbr void asm sideeffect alignstack inteldialect "
// CHECK-NEXT: to label %[[FALLTHROUGHBB:[a-b0-9]+]] [label %[[JUMPBB:[a-b0-9]+]]]
asm!("jmp {}", label {});
}
// CHECK-LABEL: @asm_goto_with_outputs
#[no_mangle]
pub unsafe fn asm_goto_with_outputs() -> u64 {
let out: u64;
// CHECK: [[RES:%[0-9]+]] = callbr i64 asm sideeffect alignstack inteldialect "
// CHECK-NEXT: to label %[[FALLTHROUGHBB:[a-b0-9]+]] [label %[[JUMPBB:[a-b0-9]+]]]
asm!("{} /* {} */", out(reg) out, label { return 1; });
// CHECK: [[JUMPBB]]:
// CHECK-NEXT: [[RET:%.+]] = phi i64 [ [[RES]], %[[FALLTHROUGHBB]] ], [ 1, %start ]
// CHECK-NEXT: ret i64 [[RET]]
out
}
// CHECK-LABEL: @asm_goto_noreturn
#[no_mangle]
pub unsafe fn asm_goto_noreturn() -> u64 {
let out: u64;
// CHECK: callbr void asm sideeffect alignstack inteldialect "
// CHECK-NEXT: to label %unreachable [label %[[JUMPBB:[a-b0-9]+]]]
asm!("jmp {}", label { return 1; }, options(noreturn));
// CHECK: [[JUMPBB]]:
// CHECK-NEXT: ret i64 1
out
}
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