1 ; RUN: opt < %s -analyze -scalar-evolution \ 2 ; RUN: -scalar-evolution-max-iterations=0 | FileCheck %s 3 ; PR2607 4 5 define i32 @_Z1aj(i32 %j) nounwind { 6 entry: 7 icmp sgt i32 0, %j ; <i1>:0 [#uses=1] 8 br i1 %0, label %bb.preheader, label %return 9 10 bb.preheader: ; preds = %entry 11 br label %bb 12 13 bb: ; preds = %bb, %bb.preheader 14 %i.01 = phi i32 [ %1, %bb ], [ 0, %bb.preheader ] ; <i32> [#uses=1] 15 add i32 %i.01, -1 ; <i32>:1 [#uses=3] 16 icmp sgt i32 %1, %j ; <i1>:2 [#uses=1] 17 br i1 %2, label %bb, label %return.loopexit 18 19 return.loopexit: ; preds = %bb 20 br label %return 21 22 return: ; preds = %return.loopexit, %entry 23 %i.0.lcssa = phi i32 [ 0, %entry ], [ %1, %return.loopexit ] ; <i32> [#uses=1] 24 ret i32 %i.0.lcssa 25 } 26 27 ; CHECK: backedge-taken count is (-1 + (-1 * %j)) 28 29
