; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/209 Division 2/Problem D/D.ll (Z5checki)

; 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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3rmqii(i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z4rgcdii(i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z5checki(i32 noundef %0) #1 {
  %2 = alloca i1, align 1
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %29, %1
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = load i32, ptr @n, align 4, !tbaa !5
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = sub nsw i32 %8, %9
  %11 = icmp sle i32 %7, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %6
  store i32 2, ptr %5, align 4
  br label %32

13:                                               ; preds = %6
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = add nsw i32 %15, %16
  %18 = sub nsw i32 %17, 1
  %19 = call noundef i32 @_Z3rmqii(i32 noundef %14, i32 noundef %18)
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = add nsw i32 %21, %22
  %24 = sub nsw i32 %23, 1
  %25 = call noundef i32 @_Z4rgcdii(i32 noundef %20, i32 noundef %24)
  %26 = icmp eq i32 %19, %25
  br i1 %26, label %27, label %28

27:                                               ; preds = %13
  store i1 true, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %32

28:                                               ; preds = %13
  br label %29

29:                                               ; preds = %28
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %4, align 4, !tbaa !5
  br label %6, !llvm.loop !9

32:                                               ; preds = %27, %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %33 = load i32, ptr %5, align 4
  switch i32 %33, label %37 [
    i32 2, label %34
    i32 1, label %35
  ]

34:                                               ; preds = %32
  store i1 false, ptr %2, align 1
  br label %35

35:                                               ; preds = %34, %32
  %36 = load i1, ptr %2, align 1
  ret i1 %36

37:                                               ; preds = %32
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple 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"

@n = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3rmqii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z4rgcdii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z5checki(i32 noundef %0) local_unnamed_addr #0 {
  %2 = add i32 %0, -1
  %3 = load i32, ptr @n, align 4, !tbaa !5
  %.not12.not = icmp slt i32 %3, %0
  br i1 %.not12.not, label %._crit_edge, label %.lr.ph

4:                                                ; preds = %.lr.ph
  %5 = add nuw nsw i32 %.01013, 1
  %6 = load i32, ptr @n, align 4, !tbaa !5
  %7 = sub nsw i32 %6, %0
  %.not = icmp slt i32 %.01013, %7
  br i1 %.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9

.lr.ph:                                           ; preds = %1, %4
  %.01013 = phi i32 [ %5, %4 ], [ 0, %1 ]
  %8 = add i32 %2, %.01013
  %9 = tail call noundef i32 @_Z3rmqii(i32 noundef %.01013, i32 noundef %8)
  %10 = tail call noundef i32 @_Z4rgcdii(i32 noundef %.01013, i32 noundef %8)
  %11 = icmp eq i32 %9, %10
  br i1 %11, label %._crit_edge, label %4

._crit_edge:                                      ; preds = %4, %.lr.ph, %1
  %.not.lcssa = phi i1 [ false, %1 ], [ %11, %.lr.ph ], [ %11, %4 ]
  ret i1 %.not.lcssa
}

attributes #0 = { mustprogress 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" }

!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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass