; LLVM IR from hanzohasashi33/Competetive_programming :: SPOJ (rectangles)

; 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 [5 x i8], align 1
@.str.1 = 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 i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, ptr %5, align 8, !tbaa !5
  store i64 1, ptr %3, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %31, %0
  %8 = load i64, ptr %3, align 8, !tbaa !5
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = icmp sle i64 %8, %9
  br i1 %10, label %11, label %34

11:                                               ; preds = %7
  %12 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %12, ptr %4, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %27, %11
  %14 = load i64, ptr %4, align 8, !tbaa !5
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %16 = icmp sle i64 %14, %15
  br i1 %16, label %17, label %30

17:                                               ; preds = %13
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = mul nsw i64 %18, %19
  %21 = load i64, ptr %2, align 8, !tbaa !5
  %22 = icmp sle i64 %20, %21
  br i1 %22, label %23, label %26

23:                                               ; preds = %17
  %24 = load i64, ptr %5, align 8, !tbaa !5
  %25 = add nsw i64 %24, 1
  store i64 %25, ptr %5, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %23, %17
  br label %27

27:                                               ; preds = %26
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = add nsw i64 %28, 1
  store i64 %29, ptr %4, align 8, !tbaa !5
  br label %13, !llvm.loop !9

30:                                               ; preds = %13
  br label %31

31:                                               ; preds = %30
  %32 = load i64, ptr %3, align 8, !tbaa !5
  %33 = add nsw i64 %32, 1
  store i64 %33, ptr %3, align 8, !tbaa !5
  br label %7, !llvm.loop !11

34:                                               ; preds = %7
  %35 = load i64, ptr %5, align 8, !tbaa !5
  %36 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %35)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  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

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

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 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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 [5 x i8], align 1
@.str.1 = 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 i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %3 = load i64, ptr %1, align 8, !tbaa !5
  %.not16 = icmp slt i64 %3, 1
  br i1 %.not16, label %._crit_edge, label %.preheader.preheader

.preheader.preheader:                             ; preds = %0
  %xtraiter = and i64 %3, 1
  %4 = icmp eq i64 %3, 1
  br i1 %4, label %._crit_edge.loopexit.unr-lcssa, label %.preheader.preheader.new

.preheader.preheader.new:                         ; preds = %.preheader.preheader
  %unroll_iter = and i64 %3, 9223372036854775806
  br label %.preheader

.preheader:                                       ; preds = %14, %.preheader.preheader.new
  %.018 = phi i64 [ 0, %.preheader.preheader.new ], [ %spec.select.1, %14 ]
  %.01017 = phi i64 [ 1, %.preheader.preheader.new ], [ %15, %14 ]
  %niter = phi i64 [ 0, %.preheader.preheader.new ], [ %niter.next.1, %14 ]
  br label %5

5:                                                ; preds = %.preheader, %5
  %.115 = phi i64 [ %.018, %.preheader ], [ %spec.select, %5 ]
  %.0914 = phi i64 [ %.01017, %.preheader ], [ %8, %5 ]
  %6 = mul nuw nsw i64 %.0914, %.01017
  %.not13 = icmp sle i64 %6, %3
  %7 = zext i1 %.not13 to i64
  %spec.select = add nsw i64 %.115, %7
  %8 = add nuw nsw i64 %.0914, 1
  %.not12.not = icmp slt i64 %.0914, %3
  br i1 %.not12.not, label %5, label %.preheader.1, !llvm.loop !9

.preheader.1:                                     ; preds = %5
  %9 = add nuw i64 %.01017, 1
  br label %10

10:                                               ; preds = %10, %.preheader.1
  %.115.1 = phi i64 [ %spec.select, %.preheader.1 ], [ %spec.select.1, %10 ]
  %.0914.1 = phi i64 [ %9, %.preheader.1 ], [ %13, %10 ]
  %11 = mul nuw nsw i64 %.0914.1, %9
  %.not13.1 = icmp sle i64 %11, %3
  %12 = zext i1 %.not13.1 to i64
  %spec.select.1 = add nsw i64 %.115.1, %12
  %13 = add nuw nsw i64 %.0914.1, 1
  %.not12.not.1 = icmp slt i64 %.0914.1, %3
  br i1 %.not12.not.1, label %10, label %14, !llvm.loop !9

14:                                               ; preds = %10
  %15 = add nuw i64 %.01017, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa, label %.preheader, !llvm.loop !11

._crit_edge.loopexit.unr-lcssa:                   ; preds = %14, %.preheader.preheader
  %spec.select.lcssa.lcssa.ph = phi i64 [ poison, %.preheader.preheader ], [ %spec.select.1, %14 ]
  %.018.unr = phi i64 [ 0, %.preheader.preheader ], [ %spec.select.1, %14 ]
  %.01017.unr = phi i64 [ 1, %.preheader.preheader ], [ %15, %14 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.preheader.epil

.preheader.epil:                                  ; preds = %._crit_edge.loopexit.unr-lcssa, %.preheader.epil
  %.115.epil = phi i64 [ %spec.select.epil, %.preheader.epil ], [ %.018.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.0914.epil = phi i64 [ %18, %.preheader.epil ], [ %.01017.unr, %._crit_edge.loopexit.unr-lcssa ]
  %16 = mul nuw nsw i64 %.0914.epil, %.01017.unr
  %.not13.epil = icmp sle i64 %16, %3
  %17 = zext i1 %.not13.epil to i64
  %spec.select.epil = add nsw i64 %.115.epil, %17
  %18 = add nuw nsw i64 %.0914.epil, 1
  %.not12.not.epil = icmp slt i64 %.0914.epil, %3
  br i1 %.not12.not.epil, label %.preheader.epil, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.preheader.epil, %0
  %.0.lcssa = phi i64 [ 0, %0 ], [ %spec.select.lcssa.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %spec.select.epil, %.preheader.epil ]
  %19 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %.0.lcssa)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  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: 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

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 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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