; LLVM IR from AlgoGenesis/C :: Binary Index Tree/SegmentTree/Build (build_segment_tree)

; 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"

; Function Attrs: nounwind uwtable
define dso_local void @build_segment_tree(ptr noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %26, %3
  %10 = load i32, ptr %7, align 4, !tbaa !9
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %29

14:                                               ; preds = %9
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = load i32, ptr %7, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i32, ptr %15, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !9
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = load i32, ptr %6, align 4, !tbaa !9
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = add nsw i32 %21, %22
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %20, i64 %24
  store i32 %19, ptr %25, align 4, !tbaa !9
  br label %26

26:                                               ; preds = %14
  %27 = load i32, ptr %7, align 4, !tbaa !9
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %7, align 4, !tbaa !9
  br label %9, !llvm.loop !11

29:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %30 = load i32, ptr %6, align 4, !tbaa !9
  %31 = sub nsw i32 %30, 1
  store i32 %31, ptr %8, align 4, !tbaa !9
  br label %32

32:                                               ; preds = %55, %29
  %33 = load i32, ptr %8, align 4, !tbaa !9
  %34 = icmp sgt i32 %33, 0
  br i1 %34, label %36, label %35

35:                                               ; preds = %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %58

36:                                               ; preds = %32
  %37 = load ptr, ptr %5, align 8, !tbaa !5
  %38 = load i32, ptr %8, align 4, !tbaa !9
  %39 = mul nsw i32 2, %38
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds i32, ptr %37, i64 %40
  %42 = load i32, ptr %41, align 4, !tbaa !9
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  %44 = load i32, ptr %8, align 4, !tbaa !9
  %45 = mul nsw i32 2, %44
  %46 = add nsw i32 %45, 1
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds i32, ptr %43, i64 %47
  %49 = load i32, ptr %48, align 4, !tbaa !9
  %50 = add nsw i32 %42, %49
  %51 = load ptr, ptr %5, align 8, !tbaa !5
  %52 = load i32, ptr %8, align 4, !tbaa !9
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds i32, ptr %51, i64 %53
  store i32 %50, ptr %54, align 4, !tbaa !9
  br label %55

55:                                               ; preds = %36
  %56 = load i32, ptr %8, align 4, !tbaa !9
  %57 = add nsw i32 %56, -1
  store i32 %57, ptr %8, align 4, !tbaa !9
  br label %32, !llvm.loop !13

58:                                               ; preds = %35
  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 = { 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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @build_segment_tree(ptr nocapture noundef readonly %0, ptr nocapture noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = ptrtoint ptr %0 to i64
  %5 = ptrtoint ptr %1 to i64
  %6 = icmp sgt i32 %2, 0
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %7 = zext nneg i32 %2 to i64
  %invariant.gep = getelementptr inbounds i32, ptr %1, i64 %7
  %min.iters.check = icmp ult i32 %2, 12
  br i1 %min.iters.check, label %.lr.ph.preheader26, label %vector.memcheck

.lr.ph.preheader26:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %7, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader26, %.lr.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %.lr.ph.prol ], [ %indvars.iv.ph, %.lr.ph.preheader26 ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader26 ]
  %8 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.prol
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %gep.prol = getelementptr inbounds i32, ptr %invariant.gep, i64 %indvars.iv.prol
  store i32 %9, ptr %gep.prol, align 4, !tbaa !5
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !9

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader26
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader26 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %10 = sub nsw i64 %indvars.iv.ph, %7
  %11 = icmp ugt i64 %10, -4
  br i1 %11, label %.preheader, label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %12 = shl nuw nsw i64 %7, 2
  %13 = add i64 %12, %5
  %14 = sub i64 %13, %4
  %diff.check = icmp ult i64 %14, 32
  br i1 %diff.check, label %.lr.ph.preheader26, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %7, 2147483640
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %15 = getelementptr inbounds i32, ptr %0, i64 %index
  %16 = getelementptr inbounds i8, ptr %15, i64 16
  %wide.load = load <4 x i32>, ptr %15, align 4, !tbaa !5
  %wide.load25 = load <4 x i32>, ptr %16, align 4, !tbaa !5
  %17 = getelementptr inbounds i32, ptr %invariant.gep, i64 %index
  %18 = getelementptr inbounds i8, ptr %17, i64 16
  store <4 x i32> %wide.load, ptr %17, align 4, !tbaa !5
  store <4 x i32> %wide.load25, ptr %18, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 8
  %19 = icmp eq i64 %index.next, %n.vec
  br i1 %19, label %middle.block, label %vector.body, !llvm.loop !11

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %7
  br i1 %cmp.n, label %.preheader, label %.lr.ph.preheader26

.preheader:                                       ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block
  %.not = icmp eq i32 %2, 1
  br i1 %.not, label %._crit_edge, label %.lr.ph20.preheader

.lr.ph20.preheader:                               ; preds = %.preheader
  %20 = zext nneg i32 %2 to i64
  br label %.lr.ph20

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %21 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %gep = getelementptr inbounds i32, ptr %invariant.gep, i64 %indvars.iv
  store i32 %22, ptr %gep, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %23 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %gep.1 = getelementptr inbounds i32, ptr %invariant.gep, i64 %indvars.iv.next
  store i32 %24, ptr %gep.1, align 4, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %25 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next.1
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %gep.2 = getelementptr inbounds i32, ptr %invariant.gep, i64 %indvars.iv.next.1
  store i32 %26, ptr %gep.2, align 4, !tbaa !5
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %27 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next.2
  %28 = load i32, ptr %27, align 4, !tbaa !5
  %gep.3 = getelementptr inbounds i32, ptr %invariant.gep, i64 %indvars.iv.next.2
  store i32 %28, ptr %gep.3, align 4, !tbaa !5
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %7
  br i1 %exitcond.not.3, label %.preheader, label %.lr.ph, !llvm.loop !15

._crit_edge:                                      ; preds = %.lr.ph20, %3, %.preheader
  ret void

.lr.ph20:                                         ; preds = %.lr.ph20.preheader, %.lr.ph20
  %indvars.iv22 = phi i64 [ %20, %.lr.ph20.preheader ], [ %indvars.iv.next23, %.lr.ph20 ]
  %indvars.iv.next23 = add nsw i64 %indvars.iv22, -1
  %29 = shl nuw nsw i64 %indvars.iv.next23, 1
  %30 = getelementptr inbounds i32, ptr %1, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = or disjoint i64 %29, 1
  %33 = getelementptr inbounds i32, ptr %1, i64 %32
  %34 = load i32, ptr %33, align 4, !tbaa !5
  %35 = add nsw i32 %34, %31
  %36 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next23
  store i32 %35, ptr %36, align 4, !tbaa !5
  %37 = icmp ugt i64 %indvars.iv22, 2
  br i1 %37, label %.lr.ph20, label %._crit_edge, !llvm.loop !16
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.unroll.disable"}
!11 = distinct !{!11, !12, !13, !14}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!"llvm.loop.isvectorized", i32 1}
!14 = !{!"llvm.loop.unroll.runtime.disable"}
!15 = distinct !{!15, !12, !13}
!16 = distinct !{!16, !12}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass