; LLVM IR from UtkarshPathrabe/Competitive-Coding :: SPOJ Solutions/7974. What’s Next (main)

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

6:                                                ; preds = %39, %0
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %9, label %15

9:                                                ; preds = %6
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = icmp eq i32 %10, 0
  br i1 %11, label %12, label %15

12:                                               ; preds = %9
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = icmp eq i32 %13, 0
  br label %15

15:                                               ; preds = %12, %9, %6
  %16 = phi i1 [ false, %9 ], [ false, %6 ], [ %14, %12 ]
  %17 = xor i1 %16, true
  br i1 %17, label %18, label %41

18:                                               ; preds = %15
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = sub nsw i32 %19, %20
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = sub nsw i32 %22, %23
  %25 = icmp eq i32 %21, %24
  br i1 %25, label %26, label %32

26:                                               ; preds = %18
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = mul nsw i32 2, %27
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = sub nsw i32 %28, %29
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %30)
  br label %39

32:                                               ; preds = %18
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = load i32, ptr %4, align 4, !tbaa !5
  %35 = mul nsw i32 %33, %34
  %36 = load i32, ptr %3, align 4, !tbaa !5
  %37 = sdiv i32 %35, %36
  %38 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i32 noundef %37)
  br label %39

39:                                               ; preds = %32, %26
  %40 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2, ptr noundef %3, ptr noundef %4)
  br label %6, !llvm.loop !9

41:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 4, 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

@.str = external hidden unnamed_addr constant [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [7 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
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = icmp eq i32 %5, 0
  %7 = load i32, ptr %2, align 4
  %8 = icmp eq i32 %7, 0
  %or.cond4 = select i1 %6, i1 %8, i1 false
  %9 = load i32, ptr %3, align 4
  %10 = icmp eq i32 %9, 0
  %or.cond35 = select i1 %or.cond4, i1 %10, i1 false
  br i1 %or.cond35, label %._crit_edge, label %.critedge

.critedge:                                        ; preds = %0, %25
  %11 = phi i32 [ %31, %25 ], [ %9, %0 ]
  %12 = phi i32 [ %29, %25 ], [ %7, %0 ]
  %13 = phi i32 [ %27, %25 ], [ %5, %0 ]
  %14 = sub nsw i32 %12, %13
  %15 = sub nsw i32 %11, %12
  %16 = icmp eq i32 %14, %15
  br i1 %16, label %17, label %21

17:                                               ; preds = %.critedge
  %18 = shl nsw i32 %11, 1
  %19 = sub nsw i32 %18, %12
  %20 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %19)
  br label %25

21:                                               ; preds = %.critedge
  %22 = mul nsw i32 %11, %11
  %23 = sdiv i32 %22, %12
  %24 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef %23)
  br label %25

25:                                               ; preds = %21, %17
  %26 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %27 = load i32, ptr %1, align 4, !tbaa !5
  %28 = icmp eq i32 %27, 0
  %29 = load i32, ptr %2, align 4
  %30 = icmp eq i32 %29, 0
  %or.cond = select i1 %28, i1 %30, i1 false
  %31 = load i32, ptr %3, align 4
  %32 = icmp eq i32 %31, 0
  %or.cond3 = select i1 %or.cond, i1 %32, i1 false
  br i1 %or.cond3, label %._crit_edge, label %.critedge, !llvm.loop !9

._crit_edge:                                      ; preds = %25, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 4, 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass