1 ; RUN: llc -o - %s -mcpu=cyclone | FileCheck %s 2 target triple = "arm64-apple-ios" 3 4 declare void @foobar(i32 %v0, i32 %v1) 5 6 ; Make sure sub is scheduled in front of cbnz 7 ; CHECK-LABEL: test_sub_cbz: 8 ; CHECK: add w[[ADDRES:[0-9]+]], w1, #7 9 ; CHECK: sub w[[SUBRES:[0-9]+]], w0, #13 10 ; CHECK-NEXT: cbnz w[[SUBRES]], [[SKIPBLOCK:LBB[0-9_]+]] 11 ; CHECK: mov x0, x[[ADDRES]] 12 ; CHECK: mov x1, x[[SUBRES]] 13 ; CHECK: bl _foobar 14 ; CHECK: [[SKIPBLOCK]]: 15 ; CHECK: mov x0, x[[SUBRES]] 16 ; CHECK: mov x1, x[[ADDRES]] 17 ; CHECK: bl _foobar 18 define void @test_sub_cbz(i32 %a0, i32 %a1) { 19 entry: 20 ; except for the fusion opportunity the sub/add should be equal so the 21 ; scheduler would leave them in source order if it weren't for the scheduling 22 %v0 = sub i32 %a0, 13 23 %cond = icmp eq i32 %v0, 0 24 %v1 = add i32 %a1, 7 25 br i1 %cond, label %if, label %exit 26 27 if: 28 call void @foobar(i32 %v1, i32 %v0) 29 br label %exit 30 31 exit: 32 call void @foobar(i32 %v0, i32 %v1) 33 ret void 34 } 35
