; LLVM IR from upupming/algorithm :: acwing/算法竞赛进阶指南/0x43-线段树/243. 一个简单的整数问题2.ll (Z5buildiii)

; 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"

%struct.SegmentTree = type { i32, i32, i64, i64 }

@tree = external dso_local global [400040 x %struct.SegmentTree], align 16
@a = external dso_local global [100010 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %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 %4, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [400040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %10
  %12 = getelementptr inbounds %struct.SegmentTree, ptr %11, i32 0, i32 0
  store i32 %8, ptr %12, align 8, !tbaa !9
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [400040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %15
  %17 = getelementptr inbounds %struct.SegmentTree, ptr %16, i32 0, i32 1
  store i32 %13, ptr %17, align 4, !tbaa !12
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = icmp eq i32 %18, %19
  br i1 %20, label %21, label %31

21:                                               ; preds = %3
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [100010 x i32], ptr @a, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [400040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %28
  %30 = getelementptr inbounds %struct.SegmentTree, ptr %29, i32 0, i32 2
  store i64 %26, ptr %30, align 8, !tbaa !13
  br label %64

31:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %32 = load i32, ptr %5, align 4, !tbaa !5
  %33 = load i32, ptr %6, align 4, !tbaa !5
  %34 = add nsw i32 %32, %33
  %35 = ashr i32 %34, 1
  store i32 %35, ptr %7, align 4, !tbaa !5
  %36 = load i32, ptr %4, align 4, !tbaa !5
  %37 = mul nsw i32 2, %36
  %38 = load i32, ptr %5, align 4, !tbaa !5
  %39 = load i32, ptr %7, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %37, i32 noundef %38, i32 noundef %39)
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = mul nsw i32 2, %40
  %42 = add nsw i32 %41, 1
  %43 = load i32, ptr %7, align 4, !tbaa !5
  %44 = add nsw i32 %43, 1
  %45 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %42, i32 noundef %44, i32 noundef %45)
  %46 = load i32, ptr %4, align 4, !tbaa !5
  %47 = mul nsw i32 2, %46
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [400040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %48
  %50 = getelementptr inbounds %struct.SegmentTree, ptr %49, i32 0, i32 2
  %51 = load i64, ptr %50, align 8, !tbaa !13
  %52 = load i32, ptr %4, align 4, !tbaa !5
  %53 = mul nsw i32 2, %52
  %54 = add nsw i32 %53, 1
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [400040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %55
  %57 = getelementptr inbounds %struct.SegmentTree, ptr %56, i32 0, i32 2
  %58 = load i64, ptr %57, align 8, !tbaa !13
  %59 = add nsw i64 %51, %58
  %60 = load i32, ptr %4, align 4, !tbaa !5
  %61 = sext i32 %60 to i64
  %62 = getelementptr inbounds [400040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %61
  %63 = getelementptr inbounds %struct.SegmentTree, ptr %62, i32 0, i32 2
  store i64 %59, ptr %63, align 8, !tbaa !13
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %64

64:                                               ; preds = %31, %21
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!10, !6, i64 0}
!10 = !{!"_ZTS11SegmentTree", !6, i64 0, !6, i64 4, !11, i64 8, !11, i64 16}
!11 = !{!"long long", !7, i64 0}
!12 = !{!10, !6, i64 4}
!13 = !{!10, !11, i64 8}


; 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"

%struct.SegmentTree = type { i32, i32, i64, i64 }

@tree = external dso_local local_unnamed_addr global [400040 x %struct.SegmentTree], align 16
@a = external dso_local local_unnamed_addr global [100010 x i32], align 16

; Function Attrs: mustprogress nofree nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %0 to i64
  %5 = getelementptr inbounds [400040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %4
  store i32 %1, ptr %5, align 8, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %5, i64 4
  store i32 %2, ptr %6, align 4, !tbaa !11
  %7 = icmp eq i32 %1, %2
  br i1 %7, label %8, label %14

8:                                                ; preds = %3
  %9 = sext i32 %1 to i64
  %10 = getelementptr inbounds [100010 x i32], ptr @a, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !12
  %12 = sext i32 %11 to i64
  br label %common.ret

common.ret:                                       ; preds = %8, %14
  %.sink = phi i64 [ %12, %8 ], [ %26, %14 ]
  %13 = getelementptr inbounds i8, ptr %5, i64 8
  store i64 %.sink, ptr %13, align 8
  ret void

14:                                               ; preds = %3
  %15 = add nsw i32 %2, %1
  %16 = ashr i32 %15, 1
  %17 = shl nsw i32 %0, 1
  tail call void @_Z5buildiii(i32 noundef %17, i32 noundef %1, i32 noundef %16)
  %18 = or disjoint i32 %17, 1
  %19 = add nsw i32 %16, 1
  tail call void @_Z5buildiii(i32 noundef %18, i32 noundef %19, i32 noundef %2)
  %20 = sext i32 %17 to i64
  %21 = getelementptr inbounds [400040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %20, i32 2
  %22 = load i64, ptr %21, align 8, !tbaa !13
  %23 = sext i32 %18 to i64
  %24 = getelementptr inbounds [400040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %23, i32 2
  %25 = load i64, ptr %24, align 16, !tbaa !13
  %26 = add nsw i64 %25, %22
  br label %common.ret
}

attributes #0 = { mustprogress nofree nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) 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, !7, i64 0}
!6 = !{!"_ZTS11SegmentTree", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long long", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!7, !7, i64 0}
!13 = !{!6, !10, i64 8}


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