1; RUN: opt < %s -indvars -S | FileCheck %s
2
3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
4
5; It is okay to do LFTR on this loop even though the trip count is a
6; division because in this case the division can be optimized to a
7; shift.
8
9define void @foo(i8* %a, i8 %n) nounwind uwtable ssp {
10; CHECK-LABEL: @foo(
11 entry:
12  %e = icmp sgt i8 %n, 3
13  br i1 %e, label %loop, label %exit
14
15 loop:
16; CHECK-LABEL: loop:
17  %i = phi i8 [ 0, %entry ], [ %i.inc, %loop ]
18  %i1 = phi i8 [ 0, %entry ], [ %i1.inc, %loop ]
19  %i.inc = add nsw i8 %i, 4
20  %i1.inc = add i8 %i1, 1
21  store volatile i8 0, i8* %a
22  %c = icmp slt i8 %i, %n
23; CHECK-LABEL:  %exitcond = icmp ne i8 %i1.inc
24  br i1 %c, label %loop, label %exit
25
26 exit:
27; CHECK-LABEL: exit:
28  ret void
29}
30