; LLVM IR from Tunghohin/Competitive_Coding :: Poj/poj2528.ll (Z9push_downi)

; 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: mustprogress nounwind uwtable
define dso_local void @_Z9push_downi(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = sext i32 %3 to i64
  %5 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %4
  %6 = getelementptr inbounds %struct.Node, ptr %5, i32 0, i32 2
  %7 = load i32, ptr %6, align 4, !tbaa !9
  %8 = icmp ne i32 %7, 0
  br i1 %8, label %10, label %9

9:                                                ; preds = %1
  br label %36

10:                                               ; preds = %1
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %12
  %14 = getelementptr inbounds %struct.Node, ptr %13, i32 0, i32 2
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = shl i32 %16, 1
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %18
  %20 = getelementptr inbounds %struct.Node, ptr %19, i32 0, i32 2
  store i32 %15, ptr %20, align 4, !tbaa !9
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %22
  %24 = getelementptr inbounds %struct.Node, ptr %23, i32 0, i32 2
  %25 = load i32, ptr %24, align 4, !tbaa !9
  %26 = load i32, ptr %2, align 4, !tbaa !5
  %27 = shl i32 %26, 1
  %28 = or i32 %27, 1
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %29
  %31 = getelementptr inbounds %struct.Node, ptr %30, i32 0, i32 2
  store i32 %25, ptr %31, align 4, !tbaa !9
  %32 = load i32, ptr %2, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %33
  %35 = getelementptr inbounds %struct.Node, ptr %34, i32 0, i32 2
  store i32 0, ptr %35, align 4, !tbaa !9
  br label %36

36:                                               ; preds = %10, %9
  ret void
}

attributes #0 = { 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" }

!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 8}
!10 = !{!"_ZTS4Node", !6, i64 0, !6, i64 4, !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 [1000050 x %struct.Node], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z9push_downi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = sext i32 %0 to i64
  %3 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %2, i32 2
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %13, label %5

5:                                                ; preds = %1
  %6 = shl i32 %0, 1
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %7, i32 2
  store i32 %4, ptr %8, align 8, !tbaa !5
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = or disjoint i32 %6, 1
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [1000050 x %struct.Node], ptr @tr, i64 0, i64 %11, i32 2
  store i32 %9, ptr %12, align 4, !tbaa !5
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %1, %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, !7, i64 8}
!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"}


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