1; RUN: opt < %s -S -loop-unroll -unroll-threshold=800 -unroll-peel-max-count=0 | FileCheck %s
2
3; We should not peel this loop even though we can, because the max count is set
4; to zero.
5define i32 @invariant_backedge_neg_1(i32 %a, i32 %b) {
6; CHECK-LABEL: @invariant_backedge_neg_1
7; CHECK-NOT:   loop.peel{{.*}}:
8; CHECK:       loop:
9; CHECK:         %i = phi
10; CHECK:         %sum = phi
11; CHECK:         %plus = phi
12entry:
13  br label %loop
14
15loop:
16  %i = phi i32 [ 0, %entry ], [ %inc, %loop ]
17  %sum = phi i32 [ 0, %entry ], [ %incsum, %loop ]
18  %plus = phi i32 [ %a, %entry ], [ %b, %loop ]
19
20  %incsum = add i32 %sum, %plus
21  %inc = add i32 %i, 1
22  %cmp = icmp slt i32 %i, 1000
23
24  br i1 %cmp, label %loop, label %exit
25
26exit:
27  ret i32 %sum
28}
29