; LLVM IR from Tunghohin/Competitive_Coding :: Daimayuan/661.ll (Z6modifyiii)

; 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 [800040 x %struct.Node], align 16

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z7push_upi(i32 noundef) #0

; 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

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6modifyiii(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 %4, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [800040 x %struct.Node], ptr @tr, i64 0, i64 %9
  %11 = getelementptr inbounds %struct.Node, ptr %10, i32 0, i32 0
  %12 = load i32, ptr %11, align 4, !tbaa !9
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = icmp eq i32 %12, %13
  br i1 %14, label %15, label %29

15:                                               ; preds = %3
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [800040 x %struct.Node], ptr @tr, i64 0, i64 %17
  %19 = getelementptr inbounds %struct.Node, ptr %18, i32 0, i32 1
  %20 = load i32, ptr %19, align 4, !tbaa !11
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = icmp eq i32 %20, %21
  br i1 %22, label %23, label %29

23:                                               ; preds = %15
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [800040 x %struct.Node], ptr @tr, i64 0, i64 %26
  %28 = getelementptr inbounds %struct.Node, ptr %27, i32 0, i32 2
  store i32 %24, ptr %28, align 4, !tbaa !12
  br label %58

29:                                               ; preds = %15, %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [800040 x %struct.Node], ptr @tr, i64 0, i64 %31
  %33 = getelementptr inbounds %struct.Node, ptr %32, i32 0, i32 0
  %34 = load i32, ptr %33, align 4, !tbaa !9
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds [800040 x %struct.Node], ptr @tr, i64 0, i64 %36
  %38 = getelementptr inbounds %struct.Node, ptr %37, i32 0, i32 1
  %39 = load i32, ptr %38, align 4, !tbaa !11
  %40 = add nsw i32 %34, %39
  %41 = ashr i32 %40, 1
  store i32 %41, ptr %7, align 4, !tbaa !5
  %42 = load i32, ptr %5, align 4, !tbaa !5
  %43 = load i32, ptr %7, align 4, !tbaa !5
  %44 = icmp sle i32 %42, %43
  br i1 %44, label %45, label %50

45:                                               ; preds = %29
  %46 = load i32, ptr %4, align 4, !tbaa !5
  %47 = shl i32 %46, 1
  %48 = load i32, ptr %5, align 4, !tbaa !5
  %49 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z6modifyiii(i32 noundef %47, i32 noundef %48, i32 noundef %49)
  br label %56

50:                                               ; preds = %29
  %51 = load i32, ptr %4, align 4, !tbaa !5
  %52 = shl i32 %51, 1
  %53 = or i32 %52, 1
  %54 = load i32, ptr %5, align 4, !tbaa !5
  %55 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z6modifyiii(i32 noundef %53, i32 noundef %54, i32 noundef %55)
  br label %56

56:                                               ; preds = %50, %45
  %57 = load i32, ptr %4, align 4, !tbaa !5
  call void @_Z7push_upi(i32 noundef %57)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %58

58:                                               ; preds = %56, %23
  ret void
}

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 = !{!"_ZTS4Node", !6, i64 0, !6, i64 4, !6, i64 8}
!11 = !{!10, !6, i64 4}
!12 = !{!10, !6, 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.Node = type { i32, i32, i32 }

@tr = external dso_local local_unnamed_addr global [800040 x %struct.Node], align 16

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z7push_upi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6modifyiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %0 to i64
  %5 = getelementptr inbounds [800040 x %struct.Node], ptr @tr, i64 0, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = icmp eq i32 %6, %1
  %8 = getelementptr inbounds i8, ptr %5, i64 4
  %9 = load i32, ptr %8, align 4, !tbaa !10
  %10 = icmp eq i32 %9, %1
  %or.cond = select i1 %7, i1 %10, i1 false
  br i1 %or.cond, label %11, label %._crit_edge

11:                                               ; preds = %3
  %12 = getelementptr inbounds i8, ptr %5, i64 8
  store i32 %2, ptr %12, align 4, !tbaa !11
  br label %common.ret

common.ret:                                       ; preds = %11, %._crit_edge
  ret void

._crit_edge:                                      ; preds = %3
  %13 = add nsw i32 %9, %6
  %14 = ashr i32 %13, 1
  %.not = icmp slt i32 %14, %1
  %15 = shl i32 %0, 1
  %16 = zext i1 %.not to i32
  %.sink = or disjoint i32 %15, %16
  tail call void @_Z6modifyiii(i32 noundef %.sink, i32 noundef %1, i32 noundef %2)
  tail call void @_Z7push_upi(i32 noundef %0)
  br label %common.ret
}

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)"}
!5 = !{!6, !7, i64 0}
!6 = !{!"_ZTS4Node", !7, i64 0, !7, i64 4, !7, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 4}
!11 = !{!6, !7, i64 8}


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