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; RUN: opt -loop-unroll -verify-loop-lcssa -S < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@b = external local_unnamed_addr global i32, align 4
; CHECK-LABEL: @main
; CHECK: exit.loopexit:
; CHECK: {{.*}} = phi i32 [ %d.0, %h3 ]
; CHECK: br label %exit
; CHECK: exit.loopexit1:
; CHECK: {{.*}} = phi i32 [ %d.0, %h3.1 ]
; CHECK: br label %exit
define void @main() local_unnamed_addr #0 {
ph1:
br label %h1
h1:
%d.0 = phi i32 [ %1, %latch1 ], [ undef, %ph1 ]
br label %ph2
ph2:
br label %h2
h2:
%0 = phi i32 [ 0, %ph2 ], [ %inc, %latch2 ]
br label %h3
h3:
br i1 undef, label %latch3, label %exit
latch3:
br i1 false, label %exit3, label %h3
exit3:
br label %latch2
latch2:
%inc = add nuw nsw i32 %0, 1
%cmp = icmp slt i32 %inc, 2
br i1 %cmp, label %h2, label %exit2
exit2:
br i1 undef, label %latch1, label %ph2
latch1: ; preds = %exit2
%1 = load i32, i32* @b, align 4
br label %h1
exit:
%d.0.lcssa = phi i32 [ %d.0, %h3 ]
ret void
}
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