| Michael Zolotukhin | cd2255e | 2017-07-25 10:35:16 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -loop-rotate -S | FileCheck %s |
| 2 | |
| 3 | 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" |
| 4 | |
| 5 | ; Ensure that "llvm.loop.vectorize.enable" metadata was not lost after loop-rotate. |
| 6 | ; In past LoopRotate was clearing that metadata. |
| 7 | ; |
| 8 | ; See http://reviews.llvm.org/D3348 for details. |
| 9 | |
| 10 | ; CHECK-LABEL: @foo |
| 11 | ; CHECK: loop_cond: |
| 12 | ; CHECK-NOT: loop-inc |
| 13 | ; CHECK: br i1 %cmp, label %return, label %loop_cond, !llvm.loop !0 |
| 14 | ; CHECK: !0 = distinct !{!0, !1} |
| 15 | ; CHECK: !1 = !{!"llvm.loop.vectorize.enable", i1 true} |
| 16 | define i32 @foo(i32 %a) { |
| 17 | entry: |
| 18 | br label %loop_cond |
| 19 | |
| 20 | loop_cond: |
| 21 | %indx = phi i32 [ 1, %entry ], [ %inc, %loop_inc ] |
| 22 | %cmp = icmp ne i32 %indx, %a |
| 23 | br i1 %cmp, label %return, label %loop_inc |
| 24 | |
| 25 | loop_inc: |
| 26 | %inc = add i32 %indx, 1 |
| 27 | br label %loop_cond, !llvm.loop !0 |
| 28 | |
| 29 | return: |
| 30 | ret i32 0 |
| 31 | } |
| 32 | |
| 33 | !0 = !{!0, !1} |
| 34 | !1 = !{!"llvm.loop.vectorize.enable", i1 true} |