diff options
Diffstat (limited to 'tests/codegen-llvm/asm/goto.rs')
| -rw-r--r-- | tests/codegen-llvm/asm/goto.rs | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/tests/codegen-llvm/asm/goto.rs b/tests/codegen-llvm/asm/goto.rs new file mode 100644 index 00000000000..f68c399c920 --- /dev/null +++ b/tests/codegen-llvm/asm/goto.rs @@ -0,0 +1,63 @@ +//@ compile-flags: -Copt-level=3 +//@ only-x86_64 + +#![crate_type = "rlib"] +#![feature(asm_goto_with_outputs)] + +use std::arch::asm; + +// 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_with_outputs_use_in_label +#[no_mangle] +pub unsafe fn asm_goto_with_outputs_use_in_label() -> 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 out; }); + // CHECK: [[JUMPBB]]: + // CHECK-NEXT: [[RET:%.+]] = phi i64 [ 1, %[[FALLTHROUGHBB]] ], [ [[RES]], %start ] + // CHECK-NEXT: ret i64 [[RET]] + 1 +} + +// CHECK-LABEL: @asm_goto_noreturn +#[no_mangle] +pub unsafe fn asm_goto_noreturn() -> 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 +} + +// CHECK-LABEL: @asm_goto_noreturn_with_outputs +#[no_mangle] +pub unsafe fn asm_goto_noreturn_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!("mov {}, 1", "jmp {}", out(reg) out, label { return out; }); + // CHECK: [[JUMPBB]]: + // CHECK-NEXT: ret i64 [[RES]] + out +} |
