; LLVM IR from viveakrt/Competitive-programing :: SPOJ/dynacon1.ll (Z6updateiiiiiSt4pairIiiE)

; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type { i32, i32 }

@tree = external dso_local global [262144 x %"class.std::vector"], align 16

; 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
define dso_local void @_Z6updateiiiiiSt4pairIiiE(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4, i64 %5) #1 {
  %7 = alloca %"struct.std::pair", align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  %14 = alloca %"struct.std::pair", align 4
  %15 = alloca %"struct.std::pair", align 4
  store i64 %5, ptr %7, align 4
  store i32 %0, ptr %8, align 4, !tbaa !5
  store i32 %1, ptr %9, align 4, !tbaa !5
  store i32 %2, ptr %10, align 4, !tbaa !5
  store i32 %3, ptr %11, align 4, !tbaa !5
  store i32 %4, ptr %12, align 4, !tbaa !5
  %16 = load i32, ptr %11, align 4, !tbaa !5
  %17 = load i32, ptr %9, align 4, !tbaa !5
  %18 = icmp sgt i32 %16, %17
  br i1 %18, label %23, label %19

19:                                               ; preds = %6
  %20 = load i32, ptr %12, align 4, !tbaa !5
  %21 = load i32, ptr %8, align 4, !tbaa !5
  %22 = icmp slt i32 %20, %21
  br i1 %22, label %23, label %24

23:                                               ; preds = %19, %6
  br label %57

24:                                               ; preds = %19
  %25 = load i32, ptr %11, align 4, !tbaa !5
  %26 = load i32, ptr %8, align 4, !tbaa !5
  %27 = icmp sle i32 %25, %26
  br i1 %27, label %28, label %36

28:                                               ; preds = %24
  %29 = load i32, ptr %12, align 4, !tbaa !5
  %30 = load i32, ptr %9, align 4, !tbaa !5
  %31 = icmp sge i32 %29, %30
  br i1 %31, label %32, label %36

32:                                               ; preds = %28
  %33 = load i32, ptr %10, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [262144 x %"class.std::vector"], ptr @tree, i64 0, i64 %34
  call void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backERKS1_(ptr noundef nonnull align 8 dereferenceable(24) %35, ptr noundef nonnull align 4 dereferenceable(8) %7)
  br label %57

36:                                               ; preds = %28, %24
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #3
  %37 = load i32, ptr %8, align 4, !tbaa !5
  %38 = load i32, ptr %9, align 4, !tbaa !5
  %39 = add nsw i32 %37, %38
  %40 = sdiv i32 %39, 2
  store i32 %40, ptr %13, align 4, !tbaa !5
  %41 = load i32, ptr %8, align 4, !tbaa !5
  %42 = load i32, ptr %13, align 4, !tbaa !5
  %43 = load i32, ptr %10, align 4, !tbaa !5
  %44 = mul nsw i32 %43, 2
  %45 = load i32, ptr %11, align 4, !tbaa !5
  %46 = load i32, ptr %12, align 4, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %14, ptr align 4 %7, i64 8, i1 false)
  %47 = load i64, ptr %14, align 4
  call void @_Z6updateiiiiiSt4pairIiiE(i32 noundef %41, i32 noundef %42, i32 noundef %44, i32 noundef %45, i32 noundef %46, i64 %47)
  %48 = load i32, ptr %13, align 4, !tbaa !5
  %49 = add nsw i32 %48, 1
  %50 = load i32, ptr %9, align 4, !tbaa !5
  %51 = load i32, ptr %10, align 4, !tbaa !5
  %52 = mul nsw i32 %51, 2
  %53 = add nsw i32 %52, 1
  %54 = load i32, ptr %11, align 4, !tbaa !5
  %55 = load i32, ptr %12, align 4, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %15, ptr align 4 %7, i64 8, i1 false)
  %56 = load i64, ptr %15, align 4
  call void @_Z6updateiiiiiSt4pairIiiE(i32 noundef %49, i32 noundef %50, i32 noundef %53, i32 noundef %54, i32 noundef %55, i64 %56)
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #3
  br label %57

57:                                               ; preds = %36, %32, %23
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backERKS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(8)) #1 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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++ TBAA"}


; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type { i32, i32 }

@tree = external dso_local global [262144 x %"class.std::vector"], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6updateiiiiiSt4pairIiiE(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4, i64 %5) local_unnamed_addr #0 {
  %7 = alloca %"struct.std::pair", align 8
  %8 = icmp sgt i32 %3, %1
  %9 = icmp slt i32 %4, %0
  %or.cond34 = or i1 %8, %9
  br i1 %or.cond34, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %6
  %.not25 = icmp slt i32 %4, %1
  br i1 %.not25, label %tailrecurse.us, label %.lr.ph.split.split

tailrecurse.us:                                   ; preds = %.lr.ph, %tailrecurse.us
  %.tr2836.us = phi i32 [ %14, %tailrecurse.us ], [ %2, %.lr.ph ]
  %.tr35.us = phi i32 [ %13, %tailrecurse.us ], [ %0, %.lr.ph ]
  %10 = add nsw i32 %.tr35.us, %1
  %11 = sdiv i32 %10, 2
  %12 = shl nsw i32 %.tr2836.us, 1
  tail call void @_Z6updateiiiiiSt4pairIiiE(i32 noundef %.tr35.us, i32 noundef %11, i32 noundef %12, i32 noundef %3, i32 noundef %4, i64 %5)
  %13 = add nsw i32 %11, 1
  %14 = or disjoint i32 %12, 1
  %.not48 = icmp slt i32 %11, %4
  br i1 %.not48, label %tailrecurse.us, label %.loopexit

.lr.ph.split.split:                               ; preds = %.lr.ph, %tailrecurse
  %.tr2836 = phi i32 [ %21, %tailrecurse ], [ %2, %.lr.ph ]
  %.tr35 = phi i32 [ %20, %tailrecurse ], [ %0, %.lr.ph ]
  %.not = icmp slt i32 %.tr35, %3
  br i1 %.not, label %tailrecurse, label %.split.us

.split.us:                                        ; preds = %.lr.ph.split.split
  store i64 %5, ptr %7, align 8
  %15 = sext i32 %.tr2836 to i64
  %16 = getelementptr inbounds [262144 x %"class.std::vector"], ptr @tree, i64 0, i64 %15
  call void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backERKS1_(ptr noundef nonnull align 8 dereferenceable(24) %16, ptr noundef nonnull align 4 dereferenceable(8) %7)
  br label %.loopexit

tailrecurse:                                      ; preds = %.lr.ph.split.split
  %17 = add nsw i32 %.tr35, %1
  %18 = sdiv i32 %17, 2
  %19 = shl nsw i32 %.tr2836, 1
  tail call void @_Z6updateiiiiiSt4pairIiiE(i32 noundef %.tr35, i32 noundef %18, i32 noundef %19, i32 noundef %3, i32 noundef %4, i64 %5)
  %20 = add nsw i32 %18, 1
  %21 = or disjoint i32 %19, 1
  %.not47 = icmp slt i32 %18, %4
  br i1 %.not47, label %.lr.ph.split.split, label %.loopexit

.loopexit:                                        ; preds = %tailrecurse, %tailrecurse.us, %6, %.split.us
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backERKS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #0 align 2

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)"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass