; LLVM IR from tangjz/acm-icpc :: TDL_training/2015-11-22 (B - Business Center - tjz)

; 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"

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@u = external dso_local global i32, align 4
@d = external dso_local global i32, align 4
@x = external dso_local global i32, align 4
@tmp = external dso_local global i32, align 4
@ans = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  br label %2

2:                                                ; preds = %44, %0
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n, ptr noundef @m)
  %4 = icmp eq i32 %3, 2
  br i1 %4, label %5, label %47

5:                                                ; preds = %2
  store i32 2147483647, ptr @ans, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %43, %5
  %7 = load i32, ptr @m, align 4, !tbaa !5
  %8 = add nsw i32 %7, -1
  store i32 %8, ptr @m, align 4, !tbaa !5
  %9 = icmp ne i32 %7, 0
  br i1 %9, label %10, label %44

10:                                               ; preds = %6
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @u, ptr noundef @d)
  %12 = load i32, ptr @n, align 4, !tbaa !5
  %13 = load i32, ptr @d, align 4, !tbaa !5
  %14 = mul nsw i32 %12, %13
  %15 = load i32, ptr @u, align 4, !tbaa !5
  %16 = load i32, ptr @d, align 4, !tbaa !5
  %17 = add nsw i32 %15, %16
  %18 = sdiv i32 %14, %17
  store i32 %18, ptr @x, align 4, !tbaa !5
  %19 = load i32, ptr @u, align 4, !tbaa !5
  %20 = load i32, ptr @d, align 4, !tbaa !5
  %21 = add nsw i32 %19, %20
  %22 = load i32, ptr @x, align 4, !tbaa !5
  %23 = mul nsw i32 %21, %22
  %24 = load i32, ptr @n, align 4, !tbaa !5
  %25 = load i32, ptr @d, align 4, !tbaa !5
  %26 = mul nsw i32 %24, %25
  %27 = sub nsw i32 %23, %26
  store i32 %27, ptr @tmp, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %31, %10
  %29 = load i32, ptr @tmp, align 4, !tbaa !5
  %30 = icmp sle i32 %29, 0
  br i1 %30, label %31, label %37

31:                                               ; preds = %28
  %32 = load i32, ptr @u, align 4, !tbaa !5
  %33 = load i32, ptr @d, align 4, !tbaa !5
  %34 = add nsw i32 %32, %33
  %35 = load i32, ptr @tmp, align 4, !tbaa !5
  %36 = add nsw i32 %35, %34
  store i32 %36, ptr @tmp, align 4, !tbaa !5
  br label %28, !llvm.loop !9

37:                                               ; preds = %28
  %38 = load i32, ptr @ans, align 4, !tbaa !5
  %39 = load i32, ptr @tmp, align 4, !tbaa !5
  %40 = icmp sgt i32 %38, %39
  br i1 %40, label %41, label %43

41:                                               ; preds = %37
  %42 = load i32, ptr @tmp, align 4, !tbaa !5
  store i32 %42, ptr @ans, align 4, !tbaa !5
  br label %43

43:                                               ; preds = %41, %37
  br label %6, !llvm.loop !11

44:                                               ; preds = %6
  %45 = load i32, ptr @ans, align 4, !tbaa !5
  %46 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %45)
  br label %2, !llvm.loop !12

47:                                               ; preds = %2
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

declare i32 @printf(ptr noundef, ...) #1

attributes #0 = { mustprogress norecurse 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 = { "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" }

!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++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !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"

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@u = external dso_local global i32, align 4
@d = external dso_local global i32, align 4
@x = external dso_local local_unnamed_addr global i32, align 4
@tmp = external dso_local local_unnamed_addr global i32, align 4
@ans = external dso_local local_unnamed_addr global i32, align 4
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull @m)
  %2 = icmp eq i32 %1, 2
  br i1 %2, label %.lr.ph4, label %._crit_edge5

.lr.ph4:                                          ; preds = %0, %._crit_edge
  store i32 2147483647, ptr @ans, align 4, !tbaa !5
  %3 = load i32, ptr @m, align 4, !tbaa !5
  %4 = add nsw i32 %3, -1
  store i32 %4, ptr @m, align 4, !tbaa !5
  %.not2 = icmp eq i32 %3, 0
  br i1 %.not2, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph4, %26
  %5 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @u, ptr noundef nonnull @d)
  %6 = load i32, ptr @n, align 4, !tbaa !5
  %7 = load i32, ptr @d, align 4, !tbaa !5
  %8 = mul i32 %7, %6
  %9 = load i32, ptr @u, align 4, !tbaa !5
  %10 = add nsw i32 %9, %7
  %11 = sdiv i32 %8, %10
  store i32 %11, ptr @x, align 4, !tbaa !5
  %12 = mul i32 %10, %11
  %13 = sub i32 %12, %8
  %smax = tail call i32 @llvm.smax.i32(i32 %13, i32 1)
  %14 = add i32 %smax, %8
  %15 = icmp ne i32 %14, %12
  %umin = zext i1 %15 to i32
  %16 = add i32 %11, %umin
  %17 = add i32 %12, %umin
  %18 = sub i32 %14, %17
  %umax = tail call i32 @llvm.umax.i32(i32 %10, i32 1)
  %19 = udiv i32 %18, %umax
  %20 = add i32 %16, %19
  %21 = mul i32 %20, %10
  %22 = sub i32 %21, %8
  store i32 %22, ptr @tmp, align 4, !tbaa !5
  %23 = load i32, ptr @ans, align 4, !tbaa !5
  %24 = icmp sgt i32 %23, %22
  br i1 %24, label %25, label %26

25:                                               ; preds = %.lr.ph
  store i32 %22, ptr @ans, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %25, %.lr.ph
  %27 = phi i32 [ %22, %25 ], [ %23, %.lr.ph ]
  %28 = load i32, ptr @m, align 4, !tbaa !5
  %29 = add nsw i32 %28, -1
  store i32 %29, ptr @m, align 4, !tbaa !5
  %.not = icmp eq i32 %28, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %26, %.lr.ph4
  %30 = phi i32 [ 2147483647, %.lr.ph4 ], [ %27, %26 ]
  %31 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %30)
  %32 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull @m)
  %33 = icmp eq i32 %32, 2
  br i1 %33, label %.lr.ph4, label %._crit_edge5, !llvm.loop !11

._crit_edge5:                                     ; preds = %._crit_edge, %0
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.umax.i32(i32, i32) #2

attributes #0 = { mustprogress nofree norecurse 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 = { 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 #2 = { 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++ 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,TailCallElimPass