| ; 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 |
| } |
