; LLVM IR from imteekay/algorithms :: computer_science/data_structures/segment_tree/frequency.ll (Z13build_segtreeiii)

; 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::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }

@A = external dso_local global [4 x i32], align 16
@segtree = external dso_local global [1048576 x i32], align 16
@frequencyMap = external dso_local global %"class.std::map", align 8

; 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 nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z13build_segtreeiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = icmp eq i32 %8, %9
  br i1 %10, label %11, label %19

11:                                               ; preds = %3
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [4 x i32], ptr @A, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %17
  store i32 %15, ptr %18, align 4, !tbaa !5
  br label %99

19:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = load i32, ptr %6, align 4, !tbaa !5
  %22 = add nsw i32 %20, %21
  %23 = sdiv i32 %22, 2
  store i32 %23, ptr %7, align 4, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = mul nsw i32 %24, 2
  %26 = load i32, ptr %5, align 4, !tbaa !5
  %27 = load i32, ptr %7, align 4, !tbaa !5
  call void @_Z13build_segtreeiii(i32 noundef %25, i32 noundef %26, i32 noundef %27)
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = mul nsw i32 %28, 2
  %30 = add nsw i32 %29, 1
  %31 = load i32, ptr %7, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  %33 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z13build_segtreeiii(i32 noundef %30, i32 noundef %32, i32 noundef %33)
  %34 = load i32, ptr %4, align 4, !tbaa !5
  %35 = mul nsw i32 %34, 2
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %36
  %38 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @frequencyMap, ptr noundef nonnull align 4 dereferenceable(4) %37)
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = mul nsw i32 %40, 2
  %42 = add nsw i32 %41, 1
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %43
  %45 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @frequencyMap, ptr noundef nonnull align 4 dereferenceable(4) %44)
  %46 = load i32, ptr %45, align 4, !tbaa !5
  %47 = icmp sgt i32 %39, %46
  br i1 %47, label %48, label %57

48:                                               ; preds = %19
  %49 = load i32, ptr %4, align 4, !tbaa !5
  %50 = mul nsw i32 %49, 2
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %51
  %53 = load i32, ptr %52, align 4, !tbaa !5
  %54 = load i32, ptr %4, align 4, !tbaa !5
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %55
  store i32 %53, ptr %56, align 4, !tbaa !5
  br label %98

57:                                               ; preds = %19
  %58 = load i32, ptr %4, align 4, !tbaa !5
  %59 = mul nsw i32 %58, 2
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %60
  %62 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @frequencyMap, ptr noundef nonnull align 4 dereferenceable(4) %61)
  %63 = load i32, ptr %62, align 4, !tbaa !5
  %64 = load i32, ptr %4, align 4, !tbaa !5
  %65 = mul nsw i32 %64, 2
  %66 = add nsw i32 %65, 1
  %67 = sext i32 %66 to i64
  %68 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %67
  %69 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @frequencyMap, ptr noundef nonnull align 4 dereferenceable(4) %68)
  %70 = load i32, ptr %69, align 4, !tbaa !5
  %71 = icmp slt i32 %63, %70
  br i1 %71, label %72, label %82

72:                                               ; preds = %57
  %73 = load i32, ptr %4, align 4, !tbaa !5
  %74 = mul nsw i32 %73, 2
  %75 = add nsw i32 %74, 1
  %76 = sext i32 %75 to i64
  %77 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %76
  %78 = load i32, ptr %77, align 4, !tbaa !5
  %79 = load i32, ptr %4, align 4, !tbaa !5
  %80 = sext i32 %79 to i64
  %81 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %80
  store i32 %78, ptr %81, align 4, !tbaa !5
  br label %97

82:                                               ; preds = %57
  %83 = load i32, ptr %4, align 4, !tbaa !5
  %84 = mul nsw i32 %83, 2
  %85 = sext i32 %84 to i64
  %86 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %85
  %87 = load i32, ptr %4, align 4, !tbaa !5
  %88 = mul nsw i32 %87, 2
  %89 = add nsw i32 %88, 1
  %90 = sext i32 %89 to i64
  %91 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %90
  %92 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %86, ptr noundef nonnull align 4 dereferenceable(4) %91)
  %93 = load i32, ptr %92, align 4, !tbaa !5
  %94 = load i32, ptr %4, align 4, !tbaa !5
  %95 = sext i32 %94 to i64
  %96 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %95
  store i32 %93, ptr %96, align 4, !tbaa !5
  br label %97

97:                                               ; preds = %82, %72
  br label %98

98:                                               ; preds = %97, %48
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %99

99:                                               ; preds = %98, %11
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #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 = { inlinehint mustprogress 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 #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::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }

@A = external dso_local local_unnamed_addr global [4 x i32], align 16
@segtree = external dso_local global [1048576 x i32], align 16
@frequencyMap = external dso_local global %"class.std::map", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z13build_segtreeiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq i32 %1, %2
  br i1 %4, label %5, label %8

5:                                                ; preds = %3
  %6 = sext i32 %1 to i64
  %7 = getelementptr inbounds [4 x i32], ptr @A, i64 0, i64 %6
  br label %31

8:                                                ; preds = %3
  %9 = add nsw i32 %2, %1
  %10 = sdiv i32 %9, 2
  %11 = shl nsw i32 %0, 1
  tail call void @_Z13build_segtreeiii(i32 noundef %11, i32 noundef %1, i32 noundef %10)
  %12 = or disjoint i32 %11, 1
  %13 = add nsw i32 %10, 1
  tail call void @_Z13build_segtreeiii(i32 noundef %12, i32 noundef %13, i32 noundef %2)
  %14 = sext i32 %11 to i64
  %15 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %14
  %16 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @frequencyMap, ptr noundef nonnull align 4 dereferenceable(4) %15)
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = sext i32 %12 to i64
  %19 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %18
  %20 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @frequencyMap, ptr noundef nonnull align 4 dereferenceable(4) %19)
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = icmp sgt i32 %17, %21
  br i1 %22, label %31, label %23

23:                                               ; preds = %8
  %24 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @frequencyMap, ptr noundef nonnull align 4 dereferenceable(4) %15)
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @frequencyMap, ptr noundef nonnull align 4 dereferenceable(4) %19)
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = icmp slt i32 %25, %27
  br i1 %28, label %31, label %29

29:                                               ; preds = %23
  %30 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %15, ptr noundef nonnull align 4 dereferenceable(4) %19)
  br label %31

31:                                               ; preds = %23, %8, %29, %5
  %.sink26 = phi ptr [ %30, %29 ], [ %7, %5 ], [ %15, %8 ], [ %19, %23 ]
  %32 = load i32, ptr %.sink26, align 4, !tbaa !5
  %33 = sext i32 %0 to i64
  %34 = getelementptr inbounds [1048576 x i32], ptr @segtree, i64 0, i64 %33
  store i32 %32, ptr %34, align 4, !tbaa !5
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

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" }
attributes #1 = { inlinehint mustprogress 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" }

!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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass