mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-31 13:04:42 +00:00
37 lines
1.1 KiB
Rust
37 lines
1.1 KiB
Rust
//@ only-x86_64
|
|
//@ compile-flags: -C no-prepopulate-passes
|
|
#![feature(asm_goto_with_outputs)]
|
|
#![crate_type = "lib"]
|
|
use std::arch::asm;
|
|
|
|
// Regression test for #137867. Check that critical edges have been split before code generation,
|
|
// and so all stores to the asm output occur on disjoint paths without any of them jumping to
|
|
// another callbr label.
|
|
//
|
|
// CHECK-LABEL: @f(
|
|
// CHECK: [[OUT:%.*]] = callbr i32 asm
|
|
// CHECK-NEXT: to label %[[BB0:.*]] [label %[[BB1:.*]], label %[[BB2:.*]]],
|
|
// CHECK: [[BB1]]:
|
|
// CHECK-NEXT: store i32 [[OUT]], ptr %a
|
|
// CHECK-NEXT: br label %[[BBR:.*]]
|
|
// CHECK: [[BB2]]:
|
|
// CHECK-NEXT: store i32 [[OUT]], ptr %a
|
|
// CHECK-NEXT: br label %[[BBR]]
|
|
// CHECK: [[BB0]]:
|
|
// CHECK-NEXT: store i32 [[OUT]], ptr %a
|
|
// CHECK-NEXT: br label %[[BBR]]
|
|
// CHECK: [[BBR]]:
|
|
// CHECK-NEXT: [[RET:%.*]] = load i32, ptr %a
|
|
// CHECK-NEXT: ret i32 [[RET]]
|
|
#[unsafe(no_mangle)]
|
|
pub unsafe fn f(mut a: u32) -> u32 {
|
|
asm!(
|
|
"jmp {}
|
|
jmp {}",
|
|
label {},
|
|
label {},
|
|
inout("eax") a,
|
|
);
|
|
a
|
|
}
|