; LLVM IR from ayush-tulsyan/ACM-ICPC-Handbook :: code/lazyProp.ll (Z9Propogateiii)

; 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"

@Tree = external dso_local global [404000 x i64], align 16
@lazy = external dso_local global [404000 x i64], 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 nounwind uwtable
define dso_local void @_Z9Propogateiii(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
  %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 4, ptr %7) #2
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = shl i32 %9, 1
  store i32 %10, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %11 = load i32, ptr %7, align 4, !tbaa !5
  %12 = or i32 %11, 1
  store i32 %12, ptr %8, align 4, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [404000 x i64], ptr @lazy, i64 0, i64 %14
  %16 = load i64, ptr %15, align 8, !tbaa !9
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = sub nsw i32 %17, %18
  %20 = add nsw i32 %19, 1
  %21 = sext i32 %20 to i64
  %22 = mul nsw i64 %16, %21
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [404000 x i64], ptr @Tree, i64 0, i64 %24
  %26 = load i64, ptr %25, align 8, !tbaa !9
  %27 = add nsw i64 %26, %22
  store i64 %27, ptr %25, align 8, !tbaa !9
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = icmp ne i32 %28, %29
  br i1 %30, label %31, label %50

31:                                               ; preds = %3
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [404000 x i64], ptr @lazy, i64 0, i64 %33
  %35 = load i64, ptr %34, align 8, !tbaa !9
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [404000 x i64], ptr @lazy, i64 0, i64 %37
  %39 = load i64, ptr %38, align 8, !tbaa !9
  %40 = add nsw i64 %39, %35
  store i64 %40, ptr %38, align 8, !tbaa !9
  %41 = load i32, ptr %4, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [404000 x i64], ptr @lazy, i64 0, i64 %42
  %44 = load i64, ptr %43, align 8, !tbaa !9
  %45 = load i32, ptr %8, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds [404000 x i64], ptr @lazy, i64 0, i64 %46
  %48 = load i64, ptr %47, align 8, !tbaa !9
  %49 = add nsw i64 %48, %44
  store i64 %49, ptr %47, align 8, !tbaa !9
  br label %50

50:                                               ; preds = %31, %3
  %51 = load i32, ptr %4, align 4, !tbaa !5
  %52 = sext i32 %51 to i64
  %53 = getelementptr inbounds [404000 x i64], ptr @lazy, i64 0, i64 %52
  store i64 0, ptr %53, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !10, i64 0}
!10 = !{!"long long", !7, i64 0}


; 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"

@Tree = external dso_local local_unnamed_addr global [404000 x i64], align 16
@lazy = external dso_local local_unnamed_addr global [404000 x i64], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z9Propogateiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %0 to i64
  %5 = getelementptr inbounds [404000 x i64], ptr @lazy, i64 0, i64 %4
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %reass.sub = sub i32 %2, %1
  %7 = add i32 %reass.sub, 1
  %8 = sext i32 %7 to i64
  %9 = mul nsw i64 %6, %8
  %10 = getelementptr inbounds [404000 x i64], ptr @Tree, i64 0, i64 %4
  %11 = load i64, ptr %10, align 8, !tbaa !5
  %12 = add nsw i64 %11, %9
  store i64 %12, ptr %10, align 8, !tbaa !5
  %.not = icmp eq i32 %1, %2
  br i1 %.not, label %25, label %13

13:                                               ; preds = %3
  %14 = shl i32 %0, 1
  %15 = or disjoint i32 %14, 1
  %16 = sext i32 %14 to i64
  %17 = getelementptr inbounds [404000 x i64], ptr @lazy, i64 0, i64 %16
  %18 = load i64, ptr %17, align 16, !tbaa !5
  %19 = add nsw i64 %18, %6
  store i64 %19, ptr %17, align 16, !tbaa !5
  %20 = load i64, ptr %5, align 8, !tbaa !5
  %21 = sext i32 %15 to i64
  %22 = getelementptr inbounds [404000 x i64], ptr @lazy, i64 0, i64 %21
  %23 = load i64, ptr %22, align 8, !tbaa !5
  %24 = add nsw i64 %23, %20
  store i64 %24, ptr %22, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %13, %3
  store i64 0, ptr %5, align 8, !tbaa !5
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn 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, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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