; LLVM IR from tangjz/acm-icpc :: self_training/2015-03-15/I.ll (Z4initii)

; 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"

@sz = external dso_local global [20002 x i64], align 16
@mx = external dso_local global [20002 x i64], align 16
@tag = external dso_local global [20002 x i64], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4initii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = call noundef i32 @_Z3idxii(i32 noundef %8, i32 noundef %9)
  store i32 %10, ptr %5, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = sub nsw i32 %11, %12
  %14 = add nsw i32 %13, 1
  %15 = sext i32 %14 to i64
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [20002 x i64], ptr @sz, i64 0, i64 %17
  store i64 %15, ptr %18, align 8, !tbaa !9
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [20002 x i64], ptr @tag, i64 0, i64 %20
  store i64 1, ptr %21, align 8, !tbaa !9
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [20002 x i64], ptr @mx, i64 0, i64 %23
  store i64 1, ptr %24, align 8, !tbaa !9
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = icmp eq i32 %25, %26
  br i1 %27, label %28, label %29

28:                                               ; preds = %2
  store i32 1, ptr %6, align 4
  br label %39

29:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = add nsw i32 %30, %31
  %33 = ashr i32 %32, 1
  store i32 %33, ptr %7, align 4, !tbaa !5
  %34 = load i32, ptr %3, align 4, !tbaa !5
  %35 = load i32, ptr %7, align 4, !tbaa !5
  call void @_Z4initii(i32 noundef %34, i32 noundef %35)
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = add nsw i32 %36, 1
  %38 = load i32, ptr %4, align 4, !tbaa !5
  call void @_Z4initii(i32 noundef %37, i32 noundef %38)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  store i32 0, ptr %6, align 4
  br label %39

39:                                               ; preds = %29, %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  %40 = load i32, ptr %6, align 4
  switch i32 %40, label %42 [
    i32 0, label %41
    i32 1, label %41
  ]

41:                                               ; preds = %39, %39
  ret void

42:                                               ; preds = %39
  unreachable
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3idxii(i32 noundef, i32 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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 = { inlinehint 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 #3 = { 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"

@sz = external dso_local local_unnamed_addr global [20002 x i64], align 16
@mx = external dso_local local_unnamed_addr global [20002 x i64], align 16
@tag = external dso_local local_unnamed_addr global [20002 x i64], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z4initii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noundef i32 @_Z3idxii(i32 noundef %0, i32 noundef %1)
  %4 = add i32 %1, 1
  %5 = sub i32 %4, %0
  %6 = sext i32 %5 to i64
  %7 = sext i32 %3 to i64
  %8 = getelementptr inbounds [20002 x i64], ptr @sz, i64 0, i64 %7
  store i64 %6, ptr %8, align 8, !tbaa !5
  %9 = getelementptr inbounds [20002 x i64], ptr @tag, i64 0, i64 %7
  store i64 1, ptr %9, align 8, !tbaa !5
  %10 = getelementptr inbounds [20002 x i64], ptr @mx, i64 0, i64 %7
  store i64 1, ptr %10, align 8, !tbaa !5
  %11 = icmp eq i32 %0, %1
  br i1 %11, label %tailrecurse._crit_edge, label %tailrecurse

tailrecurse:                                      ; preds = %2, %tailrecurse
  %.tr18 = phi i32 [ %14, %tailrecurse ], [ %0, %2 ]
  %12 = add nsw i32 %.tr18, %1
  %13 = ashr i32 %12, 1
  tail call void @_Z4initii(i32 noundef %.tr18, i32 noundef %13)
  %14 = add nsw i32 %13, 1
  %15 = tail call noundef i32 @_Z3idxii(i32 noundef %14, i32 noundef %1)
  %16 = sub i32 %1, %13
  %17 = sext i32 %16 to i64
  %18 = sext i32 %15 to i64
  %19 = getelementptr inbounds [20002 x i64], ptr @sz, i64 0, i64 %18
  store i64 %17, ptr %19, align 8, !tbaa !5
  %20 = getelementptr inbounds [20002 x i64], ptr @tag, i64 0, i64 %18
  store i64 1, ptr %20, align 8, !tbaa !5
  %21 = getelementptr inbounds [20002 x i64], ptr @mx, i64 0, i64 %18
  store i64 1, ptr %21, align 8, !tbaa !5
  %22 = icmp eq i32 %14, %1
  br i1 %22, label %tailrecurse._crit_edge, label %tailrecurse

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %2
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3idxii(i32 noundef, i32 noundef) local_unnamed_addr #1

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" }
attributes #1 = { inlinehint 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass