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1; RUN: opt < %s -passes=loop-rotate -verify-memoryssa -S | FileCheck %s2 3target 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: @foo11; CHECK: loop_cond:12; CHECK-NOT: loop-inc13; CHECK: br i1 %cmp, label %return, label %loop_cond, !llvm.loop !014; CHECK: !0 = distinct !{!0, !1}15; CHECK: !1 = !{!"llvm.loop.vectorize.enable", i1 true}16define i32 @foo(i32 %a) {17entry:18 br label %loop_cond19 20loop_cond:21 %indx = phi i32 [ 1, %entry ], [ %inc, %loop_inc ]22 %cmp = icmp ne i32 %indx, %a23 br i1 %cmp, label %return, label %loop_inc24 25loop_inc:26 %inc = add i32 %indx, 127 br label %loop_cond, !llvm.loop !028 29return:30 ret i32 031}32 33!0 = !{!0, !1}34!1 = !{!"llvm.loop.vectorize.enable", i1 true}35