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1; Check that followup attributes are applied after LoopUnroll.2;3; We choose -unroll-count=3 because it produces partial unrolling of remainder4; loops. Complete unrolling would leave no remainder loop to which to copy5; followup attributes.6 7; DEFINE: %{unroll} = opt < %s -S -passes=loop-unroll -unroll-count=38; DEFINE: %{epilog} = %{unroll} -unroll-runtime -unroll-runtime-epilog=true9; DEFINE: %{prolog} = %{unroll} -unroll-runtime -unroll-runtime-epilog=false10; DEFINE: %{fc} = FileCheck %s -check-prefixes11 12; RUN: %{unroll} | %{fc} COMMON,COUNT13; RUN: %{epilog} | %{fc} COMMON,EPILOG,EPILOG-NO-UNROLL14; RUN: %{prolog} | %{fc} COMMON,PROLOG,PROLOG-NO-UNROLL15; RUN: %{epilog} -unroll-remainder | %{fc} COMMON,EPILOG,EPILOG-UNROLL16; RUN: %{prolog} -unroll-remainder | %{fc} COMMON,PROLOG,PROLOG-UNROLL17 18target 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"19 20define i32 @test(ptr nocapture %a, i32 %n) nounwind uwtable readonly {21entry:22 %cmp1 = icmp eq i32 %n, 023 br i1 %cmp1, label %for.end, label %for.body24 25for.body: ; preds = %for.body, %entry26 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]27 %sum.02 = phi i32 [ %add, %for.body ], [ 0, %entry ]28 %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv29 %0 = load i32, ptr %arrayidx, align 430 %add = add nsw i32 %0, %sum.0231 %indvars.iv.next = add i64 %indvars.iv, 132 %lftr.wideiv = trunc i64 %indvars.iv.next to i3233 %exitcond = icmp eq i32 %lftr.wideiv, %n34 br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !435 36for.end: ; preds = %for.body, %entry37 %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]38 ret i32 %sum.0.lcssa39}40 41!1 = !{!"llvm.loop.unroll.followup_all", !{!"FollowupAll"}}42!2 = !{!"llvm.loop.unroll.followup_unrolled", !{!"FollowupUnrolled"}}43!3 = !{!"llvm.loop.unroll.followup_remainder", !{!"FollowupRemainder"}}44!4 = distinct !{!4, !1, !2, !3}45 46 47; COMMON-LABEL: @test(48 49 50; COUNT: br i1 %exitcond.2, label %for.end.loopexit, label %for.body, !llvm.loop ![[LOOP:[0-9]+]]51 52; COUNT: ![[FOLLOWUP_ALL:[0-9]+]] = !{!"FollowupAll"}53; COUNT: ![[FOLLOWUP_UNROLLED:[0-9]+]] = !{!"FollowupUnrolled"}54; COUNT: ![[LOOP]] = distinct !{![[LOOP]], ![[FOLLOWUP_ALL]], ![[FOLLOWUP_UNROLLED]]}55 56 57; EPILOG: br i1 %niter.ncmp.2, label %for.end.loopexit.unr-lcssa, label %for.body, !llvm.loop ![[LOOP_0:[0-9]+]]58; EPILOG-NO-UNROLL: br i1 %epil.iter.cmp, label %for.body.epil, label %for.end.loopexit.epilog-lcssa, !llvm.loop ![[LOOP_2:[0-9]+]]59; EPILOG-UNROLL: br i1 %epil.iter.cmp, label %for.body.epil.1, label %for.end.loopexit.epilog-lcssa60; EPILOG-UNROLL: br i1 %epil.iter.cmp.1, label %for.body.epil, label %for.end.loopexit.epilog-lcssa, !llvm.loop ![[LOOP_2:[0-9]+]]61 62; EPILOG: ![[LOOP_0]] = distinct !{![[LOOP_0]], ![[FOLLOWUP_ALL:[0-9]+]], ![[FOLLOWUP_UNROLLED:[0-9]+]]}63; EPILOG: ![[FOLLOWUP_ALL]] = !{!"FollowupAll"}64; EPILOG: ![[FOLLOWUP_UNROLLED]] = !{!"FollowupUnrolled"}65; EPILOG: ![[LOOP_2]] = distinct !{![[LOOP_2]], ![[FOLLOWUP_ALL]], ![[FOLLOWUP_REMAINDER:[0-9]+]]}66; EPILOG: ![[FOLLOWUP_REMAINDER]] = !{!"FollowupRemainder"}67 68 69; PROLOG-UNROLL: br i1 %prol.iter.cmp, label %for.body.prol.1, label %for.body.prol.loopexit.unr-lcssa70; PROLOG-UNROLL: br i1 %prol.iter.cmp.1, label %for.body.prol, label %for.body.prol.loopexit.unr-lcssa, !llvm.loop ![[LOOP_0:[0-9]+]]71; PROLOG-NO-UNROLL: br i1 %prol.iter.cmp, label %for.body.prol, label %for.body.prol.loopexit.unr-lcssa, !llvm.loop ![[LOOP_0:[0-9]+]]72; PROLOG: br i1 %exitcond.2, label %for.end.loopexit.unr-lcssa, label %for.body, !llvm.loop ![[LOOP_2:[0-9]+]]73 74; PROLOG: ![[LOOP_0]] = distinct !{![[LOOP_0]], ![[FOLLOWUP_ALL:[0-9]+]], ![[FOLLOWUP_REMAINDER:[0-9]+]]}75; PROLOG: ![[FOLLOWUP_ALL]] = !{!"FollowupAll"}76; PROLOG: ![[FOLLOWUP_REMAINDER]] = !{!"FollowupRemainder"}77; PROLOG: ![[LOOP_2]] = distinct !{![[LOOP_2]], ![[FOLLOWUP_ALL]], ![[FOLLOWUP_UNROLLED:[0-9]+]]}78; PROLOG: ![[FOLLOWUP_UNROLLED]] = !{!"FollowupUnrolled"}79