1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -S -indvars < %s | FileCheck %s
3
4declare void @use(i1)
5
6define void @test(ptr %arr) {
7; CHECK-LABEL: @test(
8; CHECK-NEXT:  entry:
9; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
10; CHECK:       loop.header:
11; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[IV_INC:%.*]], [[LOOP_LATCH:%.*]] ], [ 0, [[ENTRY:%.*]] ]
12; CHECK-NEXT:    [[PTR:%.*]] = getelementptr inbounds i32, ptr [[ARR:%.*]], i64 [[IV]]
13; CHECK-NEXT:    [[V:%.*]] = load i32, ptr [[PTR]], align 4
14; CHECK-NEXT:    [[CMP1:%.*]] = icmp sgt i32 [[V]], 0
15; CHECK-NEXT:    br i1 [[CMP1]], label [[IF:%.*]], label [[LOOP_LATCH]]
16; CHECK:       if:
17; CHECK-NEXT:    call void @use(i1 false)
18; CHECK-NEXT:    br label [[LOOP_LATCH]]
19; CHECK:       loop.latch:
20; CHECK-NEXT:    [[IV_INC]] = add nuw nsw i64 [[IV]], 1
21; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i64 [[IV_INC]], 16
22; CHECK-NEXT:    br i1 [[CMP]], label [[LOOP_HEADER]], label [[EXIT:%.*]]
23; CHECK:       exit:
24; CHECK-NEXT:    ret void
25;
26entry:
27  br label %loop.header
28
29loop.header:
30  %iv = phi i64 [ %iv.inc, %loop.latch ], [ 0, %entry ]
31  %prev = phi i32 [ %v, %loop.latch ], [ 0, %entry ]
32  %ptr = getelementptr inbounds i32, ptr %arr, i64 %iv
33  %v = load i32, ptr %ptr
34  %cmp1 = icmp sgt i32 %v, 0
35  br i1 %cmp1, label %if, label %loop.latch
36
37if:
38  %cmp2 = icmp slt i32 %prev, 0
39  call void @use(i1 %cmp2)
40  br label %loop.latch
41
42loop.latch:
43  %iv.inc = add nuw nsw i64 %iv, 1
44  %cmp = icmp ult i64 %iv.inc, 16
45  br i1 %cmp, label %loop.header, label %exit
46
47exit:
48  ret void
49}
50