1 ; RUN: opt -loop-reduce -verify < %s
3 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
4 target triple = "x86_64--linux-gnu"
6 define void @unbounded() {
9 %0 = sext i32 undef to i64
10 br i1 undef, label %block_F, label %block_G
12 block_C: ; preds = %block_F
13 br i1 undef, label %block_D, label %block_E
15 block_D: ; preds = %block_D, %block_C
16 br i1 undef, label %block_E, label %block_D
18 block_E: ; preds = %block_D, %block_C
19 %iv2 = phi i64 [ %4, %block_D ], [ %4, %block_C ]
20 %1 = add nsw i32 %iv1, 1
21 %2 = icmp eq i32 %1, undef
22 br i1 %2, label %block_G, label %block_F
24 block_F: ; preds = %block_E, %block_A
25 %iv3 = phi i64 [ %iv2, %block_E ], [ %0, %block_A ]
26 %iv1 = phi i32 [ %1, %block_E ], [ undef, %block_A ]
27 %3 = add nsw i64 %iv3, 2
28 %4 = add nsw i64 %iv3, 1
31 block_G: ; preds = %block_E, %block_A