| ; RUN: llc -o - %s -mattr=+arith-cbz-fusion | FileCheck %s |
| ; RUN: llc -o - %s -mcpu=cyclone | FileCheck %s |
| |
| target triple = "aarch64-unknown" |
| |
| declare void @foobar(i32 %v0, i32 %v1) |
| |
| ; Make sure sub is scheduled in front of cbnz |
| ; CHECK-LABEL: test_sub_cbz: |
| ; CHECK: subs w[[SUBRES:[0-9]+]], w0, #13 |
| ; CHECK: b.ne {{.?LBB[0-9_]+}} |
| define void @test_sub_cbz(i32 %a0, i32 %a1) { |
| entry: |
| ; except for the fusion opportunity the sub/add should be equal so the |
| ; scheduler would leave them in source order if it weren't for the scheduling |
| %v0 = sub i32 %a0, 13 |
| %cond = icmp eq i32 %v0, 0 |
| %v1 = add i32 %a1, 7 |
| br i1 %cond, label %if, label %exit |
| |
| if: |
| call void @foobar(i32 %v1, i32 %v0) |
| br label %exit |
| |
| exit: |
| call void @foobar(i32 %v0, i32 %v1) |
| ret void |
| } |
