1 ; RUN: opt -indvars -S < %s | FileCheck %s
4 declare void @use.i8(i8)
12 ; The only use for idx.mirror is to induce an nuw for %idx. It does
13 ; not induce an nuw for %idx.inc
14 %idx.mirror = phi i8 [ -6, %entry ], [ %idx.mirror.inc, %loop ]
15 %idx = phi i8 [ -5, %entry ], [ %idx.inc, %loop ]
17 %idx.sext = sext i8 %idx to i32
18 call void @use(i32 %idx.sext)
20 %idx.mirror.inc = add nuw i8 %idx.mirror, 1
21 call void @use.i8(i8 %idx.mirror.inc)
23 %idx.inc = add i8 %idx, 1
24 ; CHECK-NOT: %indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
25 %cmp = icmp ugt i8 %idx.inc, 0
26 br i1 %cmp, label %loop, label %exit