; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 14. Tree/SumofLeftorRightLeaves.ll (Z11sumofleavesP8TreeNodei)

; 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.TreeNode = type { i32, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z11sumofleavesP8TreeNodei(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = icmp eq ptr %6, null
  br i1 %7, label %8, label %9

8:                                                ; preds = %2
  store i32 0, ptr %3, align 4
  br label %36

9:                                                ; preds = %2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.TreeNode, ptr %10, i32 0, i32 1
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  %13 = icmp eq ptr %12, null
  br i1 %13, label %14, label %26

14:                                               ; preds = %9
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.TreeNode, ptr %15, i32 0, i32 2
  %17 = load ptr, ptr %16, align 8, !tbaa !13
  %18 = icmp eq ptr %17, null
  br i1 %18, label %19, label %26

19:                                               ; preds = %14
  %20 = load i32, ptr %5, align 4, !tbaa !9
  %21 = icmp ne i32 %20, 0
  br i1 %21, label %22, label %26

22:                                               ; preds = %19
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.TreeNode, ptr %23, i32 0, i32 0
  %25 = load i32, ptr %24, align 8, !tbaa !14
  store i32 %25, ptr %3, align 4
  br label %36

26:                                               ; preds = %19, %14, %9
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.TreeNode, ptr %27, i32 0, i32 1
  %29 = load ptr, ptr %28, align 8, !tbaa !11
  %30 = call noundef i32 @_Z11sumofleavesP8TreeNodei(ptr noundef %29, i32 noundef 1)
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.TreeNode, ptr %31, i32 0, i32 2
  %33 = load ptr, ptr %32, align 8, !tbaa !13
  %34 = call noundef i32 @_Z11sumofleavesP8TreeNodei(ptr noundef %33, i32 noundef 0)
  %35 = add nsw i32 %30, %34
  store i32 %35, ptr %3, align 4
  br label %36

36:                                               ; preds = %26, %22, %8
  %37 = load i32, ptr %3, align 4
  ret i32 %37
}

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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"_ZTS8TreeNode", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 16}
!14 = !{!12, !10, 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 willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z11sumofleavesP8TreeNodei(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  %6 = icmp eq ptr %5, null
  %7 = getelementptr inbounds i8, ptr %0, i64 16
  %8 = load ptr, ptr %7, align 8, !tbaa !11
  br i1 %6, label %9, label %tailrecurse.peel

9:                                                ; preds = %.lr.ph.preheader
  %10 = icmp eq ptr %8, null
  %11 = icmp ne i32 %1, 0
  %or.cond.peel = and i1 %11, %10
  br i1 %or.cond.peel, label %21, label %tailrecurse.peel

tailrecurse.peel:                                 ; preds = %.lr.ph.preheader, %9
  %12 = tail call noundef i32 @_Z11sumofleavesP8TreeNodei(ptr noundef %5, i32 noundef 1)
  %13 = icmp eq ptr %8, null
  br i1 %13, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %tailrecurse.peel, %.lr.ph
  %.tr14 = phi ptr [ %18, %.lr.ph ], [ %8, %tailrecurse.peel ]
  %accumulator.tr13 = phi i32 [ %19, %.lr.ph ], [ %12, %tailrecurse.peel ]
  %14 = getelementptr inbounds i8, ptr %.tr14, i64 8
  %15 = load ptr, ptr %14, align 8, !tbaa !5
  %16 = tail call noundef i32 @_Z11sumofleavesP8TreeNodei(ptr noundef %15, i32 noundef 1)
  %17 = getelementptr inbounds i8, ptr %.tr14, i64 16
  %18 = load ptr, ptr %17, align 8, !tbaa !11
  %19 = add nsw i32 %16, %accumulator.tr13
  %20 = icmp eq ptr %18, null
  br i1 %20, label %.loopexit, label %.lr.ph, !llvm.loop !12

21:                                               ; preds = %9
  %22 = load i32, ptr %0, align 8, !tbaa !14
  br label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %tailrecurse.peel, %2, %21
  %accumulator.ret.tr = phi i32 [ %22, %21 ], [ 0, %2 ], [ %12, %tailrecurse.peel ], [ %19, %.lr.ph ]
  ret i32 %accumulator.ret.tr
}

attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(read, 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 = !{!"_ZTS8TreeNode", !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 = distinct !{!12, !13}
!13 = !{!"llvm.loop.peeled.count", i32 1}
!14 = !{!6, !7, i64 0}


; Effective O3 passes: ADCEPass,BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopFullUnrollPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass