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      1 ; RUN: opt < %s -S -loop-unroll -unroll-force-peel-count=1 | FileCheck %s
      2 
      3 ; Check we don't peel loops where the latch is not the exiting block.
      4 ; CHECK-LABEL: @invariant_backedge_irreducible
      5 ; CHECK: entry:
      6 ; CHECK: br label %header
      7 ; CHECK-NOT: peel
      8 ; CHECK: header:
      9 ; CHECK: br i1 {{.*}} label %latch, label %exiting
     10 ; CHECK: latch:
     11 ; CHECK: br i1 {{.*}} label %header, label %exiting
     12 ; CHECK: exiting:
     13 ; CHECK: br i1 {{.*}} label %latch, label %exit
     14 
     15 define i32 @invariant_backedge_irreducible(i32 %a, i32 %b) {
     16 entry:
     17   br label %header
     18 
     19 header:
     20   %i = phi i32 [ 0, %entry ], [ %inc, %latch ]
     21   %cmp.phi = phi i1 [ false, %entry ], [ %cmp, %latch ]
     22   br i1 %cmp.phi, label %latch, label %exiting
     23 
     24 latch:
     25   %inc = add i32 %i, 1
     26   %cmp = icmp slt i32 %i, 1000
     27   br i1 %cmp, label %header, label %exiting
     28 
     29 exiting:
     30   %cmp.exiting = phi i1 [ %cmp.phi, %header ], [ %cmp, %latch ]
     31   br i1 %cmp.exiting, label %latch, label %exit
     32 
     33 exit:
     34   ret i32 0
     35 }
     36 
     37