; LLVM IR from Tunghohin/Competitive_Coding :: Poj/poj2528.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.Node = type { i32, i32, i32 }

@tr = external dso_local global [1000050 x %struct.Node], 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 @_Z5buildiii(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 %struct.Node, align 4
  %8 = 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
  call void @llvm.lifetime.start.p0(i64 12, ptr %7) #3
  %9 = getelementptr inbounds %struct.Node, ptr %7, i32 0, i32 0
  %10 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %10, ptr %9, align 4, !tbaa !9
  %11 = getelementptr inbounds %struct.Node, ptr %7, i32 0, i32 1
  %12 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %12, ptr %11, align 4, !tbaa !11
  %13 = getelementptr inbounds %struct.Node, ptr %7, i32 0, i32 2
  store i32 0, ptr %13, align 4, !tbaa !12
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %15
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %16, ptr align 4 %7, i64 12, i1 false), !tbaa.struct !13
  call void @llvm.lifetime.end.p0(i64 12, ptr %7) #3
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = load i32, ptr %6, align 4, !tbaa !5
  %19 = icmp eq i32 %17, %18
  br i1 %19, label %20, label %21

20:                                               ; preds = %3
  br label %36

21:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = add nsw i32 %22, %23
  %25 = ashr i32 %24, 1
  store i32 %25, ptr %8, align 4, !tbaa !5
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = shl i32 %26, 1
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = load i32, ptr %8, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %27, i32 noundef %28, i32 noundef %29)
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = shl i32 %30, 1
  %32 = or i32 %31, 1
  %33 = load i32, ptr %8, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  %35 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %32, i32 noundef %34, i32 noundef %35)
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %36

36:                                               ; preds = %21, %20
  ret void
}

; 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"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTS4Node", !6, i64 0, !6, i64 4, !6, i64 8}
!11 = !{!10, !6, i64 4}
!12 = !{!10, !6, i64 8}
!13 = !{i64 0, i64 4, !5, i64 4, i64 4, !5, i64 8, i64 4, !5}


; 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.Node = type { i32, i32, i32 }

@tr = external dso_local local_unnamed_addr global [1000050 x %struct.Node], align 16

; Function Attrs: mustprogress nofree nosync nounwind memory(write, 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 [1000050 x %struct.Node], ptr @tr, i64 0, i64 %4
  store i32 %1, ptr %5, align 4, !tbaa !5
  %.sroa.4.0..sroa_idx16 = getelementptr inbounds i8, ptr %5, i64 4
  store i32 %2, ptr %.sroa.4.0..sroa_idx16, align 4, !tbaa !5
  %.sroa.5.0..sroa_idx17 = getelementptr inbounds i8, ptr %5, i64 8
  store i32 0, ptr %.sroa.5.0..sroa_idx17, align 4, !tbaa !5
  %6 = icmp eq i32 %1, %2
  br i1 %6, label %tailrecurse._crit_edge, label %tailrecurse

tailrecurse:                                      ; preds = %3, %tailrecurse
  %.tr1419 = phi i32 [ %11, %tailrecurse ], [ %1, %3 ]
  %.tr18 = phi i32 [ %10, %tailrecurse ], [ %0, %3 ]
  %7 = add nsw i32 %.tr1419, %2
  %8 = ashr i32 %7, 1
  %9 = shl i32 %.tr18, 1
  tail call void @_Z5buildiii(i32 noundef %9, i32 noundef %.tr1419, i32 noundef %8)
  %10 = or disjoint i32 %9, 1
  %11 = add nsw i32 %8, 1
  %12 = sext i32 %10 to i64
  %13 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %12
  store i32 %11, ptr %13, align 4, !tbaa !5
  %.sroa.4.0..sroa_idx = getelementptr inbounds i8, ptr %13, i64 4
  store i32 %2, ptr %.sroa.4.0..sroa_idx, align 8, !tbaa !5
  %.sroa.5.0..sroa_idx = getelementptr inbounds i8, ptr %13, i64 8
  store i32 0, ptr %.sroa.5.0..sroa_idx, align 4, !tbaa !5
  %14 = icmp eq i32 %11, %2
  br i1 %14, label %tailrecurse._crit_edge, label %tailrecurse

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %3
  ret void
}

attributes #0 = { mustprogress nofree nosync nounwind memory(write, 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass