; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/cp/replace_each_node.ll (Z10replaceSumP4node)

; 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"

%class.node = type { i32, ptr, ptr }

; 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 noundef i32 @_Z10replaceSumP4node(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i32 0, ptr %2, align 4
  br label %46

10:                                               ; preds = %1
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %class.node, ptr %11, i32 0, i32 1
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  %14 = icmp eq ptr %13, null
  br i1 %14, label %15, label %24

15:                                               ; preds = %10
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %class.node, ptr %16, i32 0, i32 2
  %18 = load ptr, ptr %17, align 8, !tbaa !12
  %19 = icmp eq ptr %18, null
  br i1 %19, label %20, label %24

20:                                               ; preds = %15
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %class.node, ptr %21, i32 0, i32 0
  %23 = load i32, ptr %22, align 8, !tbaa !13
  store i32 %23, ptr %2, align 4
  br label %46

24:                                               ; preds = %15, %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds %class.node, ptr %25, i32 0, i32 1
  %27 = load ptr, ptr %26, align 8, !tbaa !9
  %28 = call noundef i32 @_Z10replaceSumP4node(ptr noundef %27)
  store i32 %28, ptr %4, align 4, !tbaa !14
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds %class.node, ptr %29, i32 0, i32 2
  %31 = load ptr, ptr %30, align 8, !tbaa !12
  %32 = call noundef i32 @_Z10replaceSumP4node(ptr noundef %31)
  store i32 %32, ptr %5, align 4, !tbaa !14
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %33 = load ptr, ptr %3, align 8, !tbaa !5
  %34 = getelementptr inbounds %class.node, ptr %33, i32 0, i32 0
  %35 = load i32, ptr %34, align 8, !tbaa !13
  store i32 %35, ptr %6, align 4, !tbaa !14
  %36 = load i32, ptr %4, align 4, !tbaa !14
  %37 = load i32, ptr %5, align 4, !tbaa !14
  %38 = add nsw i32 %36, %37
  %39 = load ptr, ptr %3, align 8, !tbaa !5
  %40 = getelementptr inbounds %class.node, ptr %39, i32 0, i32 0
  store i32 %38, ptr %40, align 8, !tbaa !13
  %41 = load i32, ptr %6, align 4, !tbaa !14
  %42 = load ptr, ptr %3, align 8, !tbaa !5
  %43 = getelementptr inbounds %class.node, ptr %42, i32 0, i32 0
  %44 = load i32, ptr %43, align 8, !tbaa !13
  %45 = add nsw i32 %41, %44
  store i32 %45, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %46

46:                                               ; preds = %24, %20, %9
  %47 = load i32, ptr %2, align 4
  ret i32 %47
}

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 = { 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++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"_ZTS4node", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 16}
!13 = !{!10, !11, i64 0}
!14 = !{!11, !11, 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"

; Function Attrs: mustprogress nofree nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z10replaceSumP4node(ptr noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %common.ret13, label %3

3:                                                ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  %6 = icmp eq ptr %5, null
  br i1 %6, label %7, label %13

7:                                                ; preds = %3
  %8 = getelementptr inbounds i8, ptr %0, i64 16
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %13

11:                                               ; preds = %7
  %12 = load i32, ptr %0, align 8, !tbaa !12
  br label %common.ret13

common.ret13:                                     ; preds = %1, %11, %13
  %common.ret13.op = phi i32 [ %20, %13 ], [ %12, %11 ], [ 0, %1 ]
  ret i32 %common.ret13.op

13:                                               ; preds = %7, %3
  %14 = tail call noundef i32 @_Z10replaceSumP4node(ptr noundef %5)
  %15 = getelementptr inbounds i8, ptr %0, i64 16
  %16 = load ptr, ptr %15, align 8, !tbaa !11
  %17 = tail call noundef i32 @_Z10replaceSumP4node(ptr noundef %16)
  %18 = load i32, ptr %0, align 8, !tbaa !12
  %19 = add nsw i32 %17, %14
  store i32 %19, ptr %0, align 8, !tbaa !12
  %20 = add nsw i32 %18, %19
  br label %common.ret13
}

attributes #0 = { mustprogress nofree nosync nounwind memory(readwrite, 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, !10, i64 8}
!6 = !{!"_ZTS4node", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 16}
!12 = !{!6, !7, i64 0}


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