1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc -mtriple=thumbv8m.main-none-none-eabi %s -o - -verify-machineinstrs | FileCheck %s 3 4declare i32 @fn(i32) #0 5 6define i32 @f1(i32 %a) #0 { 7; CHECK-LABEL: f1: 8; CHECK: @ %bb.0: @ %entry 9; CHECK-NEXT: .save {r4, lr} 10; CHECK-NEXT: push {r4, lr} 11; CHECK-NEXT: mov r4, r0 12; CHECK-NEXT: bl fn 13; CHECK-NEXT: movs r0, #0 14; CHECK-NEXT: cbz r4, .LBB0_2 15; CHECK-NEXT: @ %bb.1: @ %return 16; CHECK-NEXT: pop {r4, pc} 17; CHECK-NEXT: .LBB0_2: @ %if.end 18; CHECK-NEXT: bl fn 19; CHECK-NEXT: adds r0, #1 20; CHECK-NEXT: pop {r4, pc} 21entry: 22 %call = tail call i32 @fn(i32 %a) #2 23 %tobool = icmp eq i32 %a, 0 24 br i1 %tobool, label %if.end, label %return 25 26if.end: ; preds = %entry 27 %call1 = tail call i32 @fn(i32 0) #2 28 %add = add nsw i32 %call1, 1 29 br label %return 30 31return: ; preds = %entry, %if.end 32 %retval.0 = phi i32 [ %add, %if.end ], [ 0, %entry ] 33 ret i32 %retval.0 34} 35 36define i32 @f2(i32 %a) #0 { 37; CHECK-LABEL: f2: 38; CHECK: @ %bb.0: @ %entry 39; CHECK-NEXT: .save {r4, lr} 40; CHECK-NEXT: push {r4, lr} 41; CHECK-NEXT: mov r4, r0 42; CHECK-NEXT: bl fn 43; CHECK-NEXT: movs r0, #0 44; CHECK-NEXT: cmp r4, #1 45; CHECK-NEXT: bne .LBB1_2 46; CHECK-NEXT: @ %bb.1: @ %if.end 47; CHECK-NEXT: bl fn 48; CHECK-NEXT: adds r0, #1 49; CHECK-NEXT: .LBB1_2: @ %return 50; CHECK-NEXT: pop {r4, pc} 51entry: 52 %call = tail call i32 @fn(i32 %a) #2 53 %tobool = icmp eq i32 %a, 1 54 br i1 %tobool, label %if.end, label %return 55 56if.end: ; preds = %entry 57 %call1 = tail call i32 @fn(i32 0) #2 58 %add = add nsw i32 %call1, 1 59 br label %return 60 61return: ; preds = %entry, %if.end 62 %retval.0 = phi i32 [ %add, %if.end ], [ 0, %entry ] 63 ret i32 %retval.0 64} 65 66define void @f3(i32 %x) #0 { 67; CHECK-LABEL: f3: 68; CHECK: @ %bb.0: @ %entry 69; CHECK-NEXT: cmp r0, #1 70; CHECK-NEXT: bne .LBB2_2 71; CHECK-NEXT: @ %bb.1: @ %t 72; CHECK-NEXT: .save {r7, lr} 73; CHECK-NEXT: push {r7, lr} 74; CHECK-NEXT: movs r0, #0 75; CHECK-NEXT: bl fn 76; CHECK-NEXT: pop.w {r7, lr} 77; CHECK-NEXT: .LBB2_2: @ %f 78; CHECK-NEXT: bx lr 79entry: 80 %p = icmp eq i32 %x, 1 81 br i1 %p, label %t, label %f 82 83t: 84 call i32 @fn(i32 0) 85 br label %f 86 87f: 88 ret void 89} 90 91attributes #0 = { minsize nounwind optsize } 92 93