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; RUN: opt < %s -scalar-evolution -analyze | FileCheck %s
; PR1597
; CHECK: Loop %bb: backedge-taken count is (-1 + (-1 * %x) + %y)
define i32 @f(i32 %x, i32 %y) {
entry:
%tmp63 = icmp ult i32 %x, %y ; <i1> [#uses=1]
br i1 %tmp63, label %bb.preheader, label %bb8
bb.preheader: ; preds = %entry
br label %bb
bb: ; preds = %bb3, %bb.preheader
%x_addr.0 = phi i32 [ %tmp2, %bb3 ], [ %x, %bb.preheader ] ; <i32> [#uses=1]
%tmp2 = add i32 %x_addr.0, 1 ; <i32> [#uses=3]
br label %bb3
bb3: ; preds = %bb
%tmp6 = icmp ult i32 %tmp2, %y ; <i1> [#uses=1]
br i1 %tmp6, label %bb, label %bb8.loopexit
bb8.loopexit: ; preds = %bb3
br label %bb8
bb8: ; preds = %bb8.loopexit, %entry
%x_addr.1 = phi i32 [ %x, %entry ], [ %tmp2, %bb8.loopexit ] ; <i32> [#uses=1]
br label %return
return: ; preds = %bb8
ret i32 %x_addr.1
}
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