; LLVM IR from AlgoGenesis/C :: Miscellaneous Algorithms/Hopcroft's Algorithm for DFA Minimization (Program)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @initializePartitions(ptr noundef %0, i32 noundef %1, ptr noundef %2, i32 noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  store i32 %3, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %21, %4
  %12 = load i32, ptr %9, align 4, !tbaa !9
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %24

16:                                               ; preds = %11
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load i32, ptr %9, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds i32, ptr %17, i64 %19
  store i32 0, ptr %20, align 4, !tbaa !9
  br label %21

21:                                               ; preds = %16
  %22 = load i32, ptr %9, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %9, align 4, !tbaa !9
  br label %11, !llvm.loop !11

24:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %25

25:                                               ; preds = %39, %24
  %26 = load i32, ptr %10, align 4, !tbaa !9
  %27 = load i32, ptr %8, align 4, !tbaa !9
  %28 = icmp slt i32 %26, %27
  br i1 %28, label %30, label %29

29:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %42

30:                                               ; preds = %25
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  %32 = load ptr, ptr %7, align 8, !tbaa !5
  %33 = load i32, ptr %10, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds i32, ptr %32, i64 %34
  %36 = load i32, ptr %35, align 4, !tbaa !9
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds i32, ptr %31, i64 %37
  store i32 1, ptr %38, align 4, !tbaa !9
  br label %39

39:                                               ; preds = %30
  %40 = load i32, ptr %10, align 4, !tbaa !9
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %10, align 4, !tbaa !9
  br label %25, !llvm.loop !13

42:                                               ; preds = %29
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @initializePartitions(ptr nocapture noundef writeonly %0, i32 noundef %1, ptr nocapture noundef readonly %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %1, 0
  br i1 %5, label %.lr.ph.preheader, label %.preheader

.lr.ph.preheader:                                 ; preds = %4
  %6 = zext nneg i32 %1 to i64
  %7 = shl nuw nsw i64 %6, 2
  tail call void @llvm.memset.p0.i64(ptr align 4 %0, i8 0, i64 %7, i1 false), !tbaa !5
  br label %.preheader

.preheader:                                       ; preds = %.lr.ph.preheader, %4
  %8 = icmp sgt i32 %3, 0
  br i1 %8, label %.lr.ph13.preheader, label %._crit_edge

.lr.ph13.preheader:                               ; preds = %.preheader
  %wide.trip.count = zext nneg i32 %3 to i64
  %xtraiter = and i64 %wide.trip.count, 3
  %9 = icmp ult i32 %3, 4
  br i1 %9, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph13.preheader.new

.lr.ph13.preheader.new:                           ; preds = %.lr.ph13.preheader
  %unroll_iter = and i64 %wide.trip.count, 2147483644
  br label %.lr.ph13

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph13, %.lr.ph13.preheader
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph13.preheader ], [ %indvars.iv.next.3, %.lr.ph13 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph13.epil

.lr.ph13.epil:                                    ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph13.epil
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.lr.ph13.epil ], [ %indvars.iv.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph13.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %10 = getelementptr inbounds i32, ptr %2, i64 %indvars.iv.epil
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds i32, ptr %0, i64 %12
  store i32 1, ptr %13, align 4, !tbaa !5
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph13.epil, !llvm.loop !9

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph13.epil, %.preheader
  ret void

.lr.ph13:                                         ; preds = %.lr.ph13, %.lr.ph13.preheader.new
  %indvars.iv = phi i64 [ 0, %.lr.ph13.preheader.new ], [ %indvars.iv.next.3, %.lr.ph13 ]
  %niter = phi i64 [ 0, %.lr.ph13.preheader.new ], [ %niter.next.3, %.lr.ph13 ]
  %14 = getelementptr inbounds i32, ptr %2, i64 %indvars.iv
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds i32, ptr %0, i64 %16
  store i32 1, ptr %17, align 4, !tbaa !5
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %18 = getelementptr inbounds i32, ptr %2, i64 %indvars.iv.next
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i32, ptr %0, i64 %20
  store i32 1, ptr %21, align 4, !tbaa !5
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %22 = getelementptr inbounds i32, ptr %2, i64 %indvars.iv.next.1
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %0, i64 %24
  store i32 1, ptr %25, align 4, !tbaa !5
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %26 = getelementptr inbounds i32, ptr %2, i64 %indvars.iv.next.2
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i32, ptr %0, i64 %28
  store i32 1, ptr %29, align 4, !tbaa !5
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph13, !llvm.loop !11
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.unroll.disable"}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass