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} 35
