; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (1848)

; 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: nounwind uwtable
define dso_local i32 @getMinDistance(ptr noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  store i32 %3, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %12 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %12, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %49, %4
  %14 = load i32, ptr %10, align 4, !tbaa !9
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %52

18:                                               ; preds = %13
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = load i32, ptr %10, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i32, ptr %19, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !9
  %24 = load i32, ptr %7, align 4, !tbaa !9
  %25 = icmp eq i32 %23, %24
  br i1 %25, label %26, label %48

26:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %27 = load i32, ptr %8, align 4, !tbaa !9
  %28 = load i32, ptr %10, align 4, !tbaa !9
  %29 = sub nsw i32 %27, %28
  store i32 %29, ptr %11, align 4, !tbaa !9
  %30 = load i32, ptr %11, align 4, !tbaa !9
  %31 = icmp slt i32 %30, 0
  br i1 %31, label %32, label %35

32:                                               ; preds = %26
  %33 = load i32, ptr %11, align 4, !tbaa !9
  %34 = sub nsw i32 0, %33
  br label %37

35:                                               ; preds = %26
  %36 = load i32, ptr %11, align 4, !tbaa !9
  br label %37

37:                                               ; preds = %35, %32
  %38 = phi i32 [ %34, %32 ], [ %36, %35 ]
  store i32 %38, ptr %11, align 4, !tbaa !9
  %39 = load i32, ptr %9, align 4, !tbaa !9
  %40 = load i32, ptr %11, align 4, !tbaa !9
  %41 = icmp slt i32 %39, %40
  br i1 %41, label %42, label %44

42:                                               ; preds = %37
  %43 = load i32, ptr %9, align 4, !tbaa !9
  br label %46

44:                                               ; preds = %37
  %45 = load i32, ptr %11, align 4, !tbaa !9
  br label %46

46:                                               ; preds = %44, %42
  %47 = phi i32 [ %43, %42 ], [ %45, %44 ]
  store i32 %47, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  br label %48

48:                                               ; preds = %46, %18
  br label %49

49:                                               ; preds = %48
  %50 = load i32, ptr %10, align 4, !tbaa !9
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %10, align 4, !tbaa !9
  br label %13, !llvm.loop !11

52:                                               ; preds = %17
  %53 = load i32, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  ret i32 %53
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"}


; 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: read) uwtable
define dso_local i32 @getMinDistance(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %1, 0
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext nneg i32 %1 to i64
  %min.iters.check = icmp ult i32 %1, 8
  br i1 %min.iters.check, label %.lr.ph.preheader27, label %vector.ph

.lr.ph.preheader27:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %.018.ph = phi i32 [ %1, %.lr.ph.preheader ], [ %15, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %wide.trip.count, 2147483640
  %minmax.ident.splatinsert = insertelement <4 x i32> poison, i32 %1, i64 0
  %minmax.ident.splat = shufflevector <4 x i32> %minmax.ident.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer
  %broadcast.splatinsert = insertelement <4 x i32> poison, i32 %2, i64 0
  %broadcast.splat = shufflevector <4 x i32> %broadcast.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer
  %broadcast.splatinsert23 = insertelement <4 x i32> poison, i32 %3, i64 0
  %broadcast.splat24 = shufflevector <4 x i32> %broadcast.splatinsert23, <4 x i32> poison, <4 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ %minmax.ident.splat, %vector.ph ], [ %predphi, %vector.body ]
  %vec.phi20 = phi <4 x i32> [ %minmax.ident.splat, %vector.ph ], [ %predphi25, %vector.body ]
  %vec.ind = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, %vector.ph ], [ %vec.ind.next, %vector.body ]
  %step.add = add <4 x i32> %vec.ind, <i32 4, i32 4, i32 4, i32 4>
  %6 = getelementptr inbounds i32, ptr %0, i64 %index
  %7 = getelementptr inbounds i8, ptr %6, i64 16
  %wide.load = load <4 x i32>, ptr %6, align 4, !tbaa !5
  %wide.load22 = load <4 x i32>, ptr %7, align 4, !tbaa !5
  %.not = icmp eq <4 x i32> %wide.load, %broadcast.splat
  %.not26 = icmp eq <4 x i32> %wide.load22, %broadcast.splat
  %8 = sub <4 x i32> %broadcast.splat24, %vec.ind
  %9 = sub <4 x i32> %broadcast.splat24, %step.add
  %10 = tail call <4 x i32> @llvm.abs.v4i32(<4 x i32> %8, i1 true)
  %11 = tail call <4 x i32> @llvm.abs.v4i32(<4 x i32> %9, i1 true)
  %12 = tail call <4 x i32> @llvm.smin.v4i32(<4 x i32> %vec.phi, <4 x i32> %10)
  %13 = tail call <4 x i32> @llvm.smin.v4i32(<4 x i32> %vec.phi20, <4 x i32> %11)
  %predphi = select <4 x i1> %.not, <4 x i32> %12, <4 x i32> %vec.phi
  %predphi25 = select <4 x i1> %.not26, <4 x i32> %13, <4 x i32> %vec.phi20
  %index.next = add nuw i64 %index, 8
  %vec.ind.next = add <4 x i32> %vec.ind, <i32 8, i32 8, i32 8, i32 8>
  %14 = icmp eq i64 %index.next, %n.vec
  br i1 %14, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %rdx.minmax = tail call <4 x i32> @llvm.smin.v4i32(<4 x i32> %predphi, <4 x i32> %predphi25)
  %15 = tail call i32 @llvm.vector.reduce.smin.v4i32(<4 x i32> %rdx.minmax)
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader27

._crit_edge:                                      ; preds = %24, %middle.block, %4
  %.0.lcssa = phi i32 [ %1, %4 ], [ %15, %middle.block ], [ %.1, %24 ]
  ret i32 %.0.lcssa

.lr.ph:                                           ; preds = %.lr.ph.preheader27, %24
  %indvars.iv = phi i64 [ %indvars.iv.next, %24 ], [ %indvars.iv.ph, %.lr.ph.preheader27 ]
  %.018 = phi i32 [ %.1, %24 ], [ %.018.ph, %.lr.ph.preheader27 ]
  %16 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = icmp eq i32 %17, %2
  br i1 %18, label %19, label %24

19:                                               ; preds = %.lr.ph
  %20 = trunc i64 %indvars.iv to i32
  %21 = sub i32 %3, %20
  %22 = tail call i32 @llvm.abs.i32(i32 %21, i1 true)
  %23 = tail call i32 @llvm.smin.i32(i32 %.018, i32 %22)
  br label %24

24:                                               ; preds = %.lr.ph, %19
  %.1 = phi i32 [ %23, %19 ], [ %.018, %.lr.ph ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <4 x i32> @llvm.abs.v4i32(<4 x i32>, i1 immarg) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <4 x i32> @llvm.smin.v4i32(<4 x i32>, <4 x i32>) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.smin.v4i32(<4 x i32>) #1

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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 nosync nounwind speculatable willreturn memory(none) }

!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, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}


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