| ; RUN: opt < %s -loop-vectorize -debug -S -o /dev/null 2>&1 | FileCheck %s |
| ; REQUIRES: asserts |
| |
| ; D40973 |
| ; Make sure LV legal bails out when the loop doesn't have a legal pre-header. |
| |
| ; CHECK: LV: Loop doesn't have a legal pre-header. |
| |
| define void @inc(i32 %n, i8* %P) { |
| %1 = icmp sgt i32 %n, 0 |
| br i1 %1, label %BB1, label %BB2 |
| |
| BB1: |
| indirectbr i8* %P, [label %.lr.ph] |
| |
| BB2: |
| br label %.lr.ph |
| |
| .lr.ph: |
| %indvars.iv = phi i32 [ %indvars.iv.next, %.lr.ph ], [ 0, %BB1 ], [ 0, %BB2 ] |
| %indvars.iv.next = add i32 %indvars.iv, 1 |
| %exitcond = icmp eq i32 %indvars.iv.next, %n |
| br i1 %exitcond, label %._crit_edge, label %.lr.ph |
| |
| ._crit_edge: |
| ret void |
| } |
