| ; RUN: opt < %s -analyze -enable-new-pm=0 -scalar-evolution -scalar-evolution-max-iterations=0 | FileCheck %s |
| ; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-max-iterations=0 2>&1 | FileCheck %s |
| ; PR2607 |
| |
| define i32 @_Z1aj(i32 %j) nounwind { |
| entry: |
| icmp sgt i32 0, %j ; <i1>:0 [#uses=1] |
| br i1 %0, label %bb.preheader, label %return |
| |
| bb.preheader: ; preds = %entry |
| br label %bb |
| |
| bb: ; preds = %bb, %bb.preheader |
| %i.01 = phi i32 [ %1, %bb ], [ 0, %bb.preheader ] ; <i32> [#uses=1] |
| add i32 %i.01, -1 ; <i32>:1 [#uses=3] |
| icmp sgt i32 %1, %j ; <i1>:2 [#uses=1] |
| br i1 %2, label %bb, label %return.loopexit |
| |
| return.loopexit: ; preds = %bb |
| br label %return |
| |
| return: ; preds = %return.loopexit, %entry |
| %i.0.lcssa = phi i32 [ 0, %entry ], [ %1, %return.loopexit ] ; <i32> [#uses=1] |
| ret i32 %i.0.lcssa |
| } |
| |
| ; CHECK: backedge-taken count is (-1 + (-1 * %j)) |
| |
