1; RUN: opt < %s -scalar-evolution -analyze -enable-new-pm=0 | FileCheck %s 2; RUN: opt < %s "-passes=print<scalar-evolution>" -disable-output 2>&1 | FileCheck %s 3; PR1597 4 5; CHECK: Loop %bb: backedge-taken count is (-1 + (-1 * %x) + %y) 6 7define i32 @f(i32 %x, i32 %y) { 8entry: 9 %tmp63 = icmp ult i32 %x, %y ; <i1> [#uses=1] 10 br i1 %tmp63, label %bb.preheader, label %bb8 11 12bb.preheader: ; preds = %entry 13 br label %bb 14 15bb: ; preds = %bb3, %bb.preheader 16 %x_addr.0 = phi i32 [ %tmp2, %bb3 ], [ %x, %bb.preheader ] ; <i32> [#uses=1] 17 %tmp2 = add i32 %x_addr.0, 1 ; <i32> [#uses=3] 18 br label %bb3 19 20bb3: ; preds = %bb 21 %tmp6 = icmp ult i32 %tmp2, %y ; <i1> [#uses=1] 22 br i1 %tmp6, label %bb, label %bb8.loopexit 23 24bb8.loopexit: ; preds = %bb3 25 br label %bb8 26 27bb8: ; preds = %bb8.loopexit, %entry 28 %x_addr.1 = phi i32 [ %x, %entry ], [ %tmp2, %bb8.loopexit ] ; <i32> [#uses=1] 29 br label %return 30 31return: ; preds = %bb8 32 ret i32 %x_addr.1 33} 34