; LLVM IR from UtkarshPathrabe/Competitive-Coding :: SPOJ Solutions (ABSP1_Solution)

; 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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %9

9:                                                ; preds = %62, %0
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = add nsw i32 %10, -1
  store i32 %11, ptr %2, align 4, !tbaa !5
  %12 = icmp ne i32 %10, 0
  br i1 %12, label %13, label %66

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = zext i32 %15 to i64
  %17 = call ptr @llvm.stacksave.p0()
  store ptr %17, ptr %5, align 8
  %18 = alloca i64, i64 %16, align 16
  store i64 %16, ptr %6, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  store i64 0, ptr %7, align 8, !tbaa !9
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %28, %13
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = icmp slt i32 %20, %21
  br i1 %22, label %23, label %31

23:                                               ; preds = %19
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds i64, ptr %18, i64 %25
  %27 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %26)
  br label %28

28:                                               ; preds = %23
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %4, align 4, !tbaa !5
  br label %19, !llvm.loop !11

31:                                               ; preds = %19
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %32

32:                                               ; preds = %59, %31
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = load i32, ptr %3, align 4, !tbaa !5
  %35 = sdiv i32 %34, 2
  %36 = icmp slt i32 %33, %35
  br i1 %36, label %37, label %62

37:                                               ; preds = %32
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = load i32, ptr %4, align 4, !tbaa !5
  %40 = mul nsw i32 2, %39
  %41 = sub nsw i32 %38, %40
  %42 = sub nsw i32 %41, 1
  %43 = sext i32 %42 to i64
  %44 = load i32, ptr %3, align 4, !tbaa !5
  %45 = load i32, ptr %4, align 4, !tbaa !5
  %46 = sub nsw i32 %44, %45
  %47 = sub nsw i32 %46, 1
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds i64, ptr %18, i64 %48
  %50 = load i64, ptr %49, align 8, !tbaa !9
  %51 = load i32, ptr %4, align 4, !tbaa !5
  %52 = sext i32 %51 to i64
  %53 = getelementptr inbounds i64, ptr %18, i64 %52
  %54 = load i64, ptr %53, align 8, !tbaa !9
  %55 = sub nsw i64 %50, %54
  %56 = mul nsw i64 %43, %55
  %57 = load i64, ptr %7, align 8, !tbaa !9
  %58 = add nsw i64 %57, %56
  store i64 %58, ptr %7, align 8, !tbaa !9
  br label %59

59:                                               ; preds = %37
  %60 = load i32, ptr %4, align 4, !tbaa !5
  %61 = add nsw i32 %60, 1
  store i32 %61, ptr %4, align 4, !tbaa !5
  br label %32, !llvm.loop !13

62:                                               ; preds = %32
  %63 = load i64, ptr %7, align 8, !tbaa !9
  %64 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %63)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  %65 = load ptr, ptr %5, align 8
  call void @llvm.stackrestore.p0(ptr %65)
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %9, !llvm.loop !14

66:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  ret i32 0
}

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

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #3

declare i32 @printf(ptr noundef, ...) #2

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

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #3

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 = { "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 #3 = { nocallback nofree nosync nounwind willreturn }
attributes #4 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = add nsw i32 %4, -1
  store i32 %5, ptr %1, align 4, !tbaa !5
  %.not16 = icmp eq i32 %4, 0
  br i1 %.not16, label %._crit_edge19, label %.lr.ph18

.lr.ph18:                                         ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = zext i32 %7 to i64
  %9 = call ptr @llvm.stacksave.p0()
  %10 = alloca i64, i64 %8, align 16
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = icmp sgt i32 %11, 0
  br i1 %12, label %.lr.ph, label %._crit_edge

.preheader:                                       ; preds = %.lr.ph
  %13 = icmp sgt i32 %37, 1
  br i1 %13, label %.lr.ph14.preheader, label %._crit_edge

.lr.ph14.preheader:                               ; preds = %.preheader
  %14 = lshr i32 %37, 1
  %15 = zext nneg i32 %37 to i64
  %wide.trip.count = zext nneg i32 %14 to i64
  %16 = getelementptr i64, ptr %10, i64 %15
  %min.iters.check = icmp ult i32 %37, 8
  br i1 %min.iters.check, label %.lr.ph14.preheader35, label %vector.ph

.lr.ph14.preheader35:                             ; preds = %middle.block, %.lr.ph14.preheader
  %indvars.iv23.ph = phi i64 [ 0, %.lr.ph14.preheader ], [ %n.vec, %middle.block ]
  %.013.ph = phi i64 [ 0, %.lr.ph14.preheader ], [ %34, %middle.block ]
  br label %.lr.ph14

vector.ph:                                        ; preds = %.lr.ph14.preheader
  %n.vec = and i64 %wide.trip.count, 1073741820
  %broadcast.splatinsert = insertelement <2 x i64> poison, i64 %15, i64 0
  %broadcast.splat = shufflevector <2 x i64> %broadcast.splatinsert, <2 x i64> poison, <2 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.ind = phi <2 x i64> [ <i64 0, i64 1>, %vector.ph ], [ %vec.ind.next, %vector.body ]
  %vec.phi = phi <2 x i64> [ zeroinitializer, %vector.ph ], [ %31, %vector.body ]
  %vec.phi30 = phi <2 x i64> [ zeroinitializer, %vector.ph ], [ %32, %vector.body ]
  %17 = shl nuw nsw <2 x i64> %vec.ind, <i64 1, i64 1>
  %step.add = shl <2 x i64> %vec.ind, <i64 1, i64 1>
  %18 = xor <2 x i64> %17, <i64 -1, i64 -1>
  %19 = add nsw <2 x i64> %broadcast.splat, %18
  %reass.sub = sub <2 x i64> %broadcast.splat, %step.add
  %20 = add <2 x i64> %reass.sub, <i64 -5, i64 -5>
  %21 = xor i64 %index, -1
  %22 = getelementptr i64, ptr %16, i64 %21
  %23 = getelementptr i8, ptr %22, i64 -8
  %24 = getelementptr i8, ptr %22, i64 -24
  %wide.load = load <2 x i64>, ptr %23, align 8, !tbaa !9
  %reverse = shufflevector <2 x i64> %wide.load, <2 x i64> poison, <2 x i32> <i32 1, i32 0>
  %wide.load31 = load <2 x i64>, ptr %24, align 8, !tbaa !9
  %reverse32 = shufflevector <2 x i64> %wide.load31, <2 x i64> poison, <2 x i32> <i32 1, i32 0>
  %25 = getelementptr inbounds i64, ptr %10, i64 %index
  %26 = getelementptr inbounds i8, ptr %25, i64 16
  %wide.load33 = load <2 x i64>, ptr %25, align 16, !tbaa !9
  %wide.load34 = load <2 x i64>, ptr %26, align 16, !tbaa !9
  %27 = sub nsw <2 x i64> %reverse, %wide.load33
  %28 = sub nsw <2 x i64> %reverse32, %wide.load34
  %29 = mul nsw <2 x i64> %27, %19
  %30 = mul nsw <2 x i64> %28, %20
  %31 = add <2 x i64> %29, %vec.phi
  %32 = add <2 x i64> %30, %vec.phi30
  %index.next = add nuw i64 %index, 4
  %vec.ind.next = add <2 x i64> %vec.ind, <i64 4, i64 4>
  %33 = icmp eq i64 %index.next, %n.vec
  br i1 %33, label %middle.block, label %vector.body, !llvm.loop !11

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <2 x i64> %32, %31
  %34 = call i64 @llvm.vector.reduce.add.v2i64(<2 x i64> %bin.rdx)
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph14.preheader35

.lr.ph:                                           ; preds = %.lr.ph18, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.lr.ph18 ]
  %35 = getelementptr inbounds i64, ptr %10, i64 %indvars.iv
  %36 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %35)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %37 = load i32, ptr %2, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = icmp slt i64 %indvars.iv.next, %38
  br i1 %39, label %.lr.ph, label %.preheader, !llvm.loop !15

.lr.ph14:                                         ; preds = %.lr.ph14.preheader35, %.lr.ph14
  %indvars.iv23 = phi i64 [ %indvars.iv.next24, %.lr.ph14 ], [ %indvars.iv23.ph, %.lr.ph14.preheader35 ]
  %.013 = phi i64 [ %50, %.lr.ph14 ], [ %.013.ph, %.lr.ph14.preheader35 ]
  %40 = shl nuw nsw i64 %indvars.iv23, 1
  %41 = xor i64 %40, -1
  %42 = add nsw i64 %15, %41
  %43 = xor i64 %indvars.iv23, -1
  %44 = getelementptr i64, ptr %16, i64 %43
  %45 = load i64, ptr %44, align 8, !tbaa !9
  %46 = getelementptr inbounds i64, ptr %10, i64 %indvars.iv23
  %47 = load i64, ptr %46, align 8, !tbaa !9
  %48 = sub nsw i64 %45, %47
  %49 = mul nsw i64 %48, %42
  %50 = add nsw i64 %49, %.013
  %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next24, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph14, !llvm.loop !16

._crit_edge:                                      ; preds = %.lr.ph14, %middle.block, %.lr.ph18, %.preheader
  %.0.lcssa = phi i64 [ 0, %.preheader ], [ 0, %.lr.ph18 ], [ %34, %middle.block ], [ %50, %.lr.ph14 ]
  %51 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.0.lcssa)
  call void @llvm.stackrestore.p0(ptr %9)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  %52 = load i32, ptr %1, align 4, !tbaa !5
  %53 = add nsw i32 %52, -1
  store i32 %53, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %52, 0
  br i1 %.not, label %._crit_edge19, label %.lr.ph18, !llvm.loop !17

._crit_edge19:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0
}

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

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #3

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

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

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.vector.reduce.add.v2i64(<2 x i64>) #4

attributes #0 = { nofree 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "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 #3 = { mustprogress nocallback nofree nosync nounwind willreturn }
attributes #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12, !13, !14}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!"llvm.loop.isvectorized", i32 1}
!14 = !{!"llvm.loop.unroll.runtime.disable"}
!15 = distinct !{!15, !12}
!16 = distinct !{!16, !12, !14, !13}
!17 = distinct !{!17, !12}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass