diff options
Diffstat (limited to 'tests/codegen/asm-goto.rs')
| -rw-r--r-- | tests/codegen/asm-goto.rs | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/tests/codegen/asm-goto.rs b/tests/codegen/asm-goto.rs new file mode 100644 index 00000000000..e522d0da5b4 --- /dev/null +++ b/tests/codegen/asm-goto.rs @@ -0,0 +1,51 @@ +//@ 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 +} |
