| ; RUN: opt < %s -loop-rotate -S | FileCheck %s |
| |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| |
| ; Ensure that "llvm.loop.vectorize.enable" metadata was not lost after loop-rotate. |
| ; In past LoopRotate was clearing that metadata. |
| ; |
| ; See http://reviews.llvm.org/D3348 for details. |
| |
| ; CHECK-LABEL: @foo |
| ; CHECK: loop_cond: |
| ; CHECK-NOT: loop-inc |
| ; CHECK: br i1 %cmp, label %return, label %loop_cond, !llvm.loop !0 |
| ; CHECK: !0 = distinct !{!0, !1} |
| ; CHECK: !1 = !{!"llvm.loop.vectorize.enable", i1 true} |
| define i32 @foo(i32 %a) { |
| entry: |
| br label %loop_cond |
| |
| loop_cond: |
| %indx = phi i32 [ 1, %entry ], [ %inc, %loop_inc ] |
| %cmp = icmp ne i32 %indx, %a |
| br i1 %cmp, label %return, label %loop_inc |
| |
| loop_inc: |
| %inc = add i32 %indx, 1 |
| br label %loop_cond, !llvm.loop !0 |
| |
| return: |
| ret i32 0 |
| } |
| |
| !0 = !{!0, !1} |
| !1 = !{!"llvm.loop.vectorize.enable", i1 true} |
