; LLVM IR from lzyrapx/Competitive-Programming :: LibreOJ/106（Splay）（104基础上加区间）.ll (Z4PreYi)

; 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"

@qc = external dso_local global i32, align 4
@val = external dso_local global [1500300 x i32], align 16
@tree = external dso_local global [1500300 x [2 x i32]], 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 uwtable
define dso_local noundef i32 @_Z4PreYi(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %5 = load i32, ptr %3, align 4, !tbaa !5
  %6 = icmp ne i32 %5, 0
  br i1 %6, label %8, label %7

7:                                                ; preds = %1
  store i32 -1000000010, ptr %2, align 4
  br label %34

8:                                                ; preds = %1
  %9 = load i32, ptr @qc, align 4, !tbaa !5
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [1500300 x i32], ptr @val, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = icmp sle i32 %9, %13
  br i1 %14, label %15, label %22

15:                                               ; preds = %8
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [1500300 x [2 x i32]], ptr @tree, i64 0, i64 %17
  %19 = getelementptr inbounds [2 x i32], ptr %18, i64 0, i64 0
  %20 = load i32, ptr %19, align 8, !tbaa !5
  %21 = call noundef i32 @_Z4PreYi(i32 noundef %20)
  store i32 %21, ptr %2, align 4
  br label %34

22:                                               ; preds = %8
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [1500300 x i32], ptr @val, i64 0, i64 %24
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [1500300 x [2 x i32]], ptr @tree, i64 0, i64 %27
  %29 = getelementptr inbounds [2 x i32], ptr %28, i64 0, i64 1
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = call noundef i32 @_Z4PreYi(i32 noundef %30)
  store i32 %31, ptr %4, align 4, !tbaa !5
  %32 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %25, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %33 = load i32, ptr %32, align 4, !tbaa !5
  store i32 %33, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %34

34:                                               ; preds = %22, %15, %7
  %35 = load i32, ptr %2, align 4
  ret i32 %35
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

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 = { 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"}


; 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"

@qc = external dso_local local_unnamed_addr global i32, align 4
@val = external dso_local global [1500300 x i32], align 16
@tree = external dso_local local_unnamed_addr global [1500300 x [2 x i32]], align 16

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress 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 noundef i32 @_Z4PreYi(i32 noundef %0) local_unnamed_addr #1 {
  %2 = alloca i32, align 4
  %.not10 = icmp eq i32 %0, 0
  br i1 %.not10, label %common.ret20, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %3 = load i32, ptr @qc, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %.lr.ph, %tailrecurse
  %.tr11 = phi i32 [ %0, %.lr.ph ], [ %9, %tailrecurse ]
  %5 = sext i32 %.tr11 to i64
  %6 = getelementptr inbounds [1500300 x i32], ptr @val, i64 0, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %.not7 = icmp sgt i32 %3, %7
  br i1 %.not7, label %10, label %tailrecurse

tailrecurse:                                      ; preds = %4
  %8 = getelementptr inbounds [1500300 x [2 x i32]], ptr @tree, i64 0, i64 %5
  %9 = load i32, ptr %8, align 8, !tbaa !5
  %.not = icmp eq i32 %9, 0
  br i1 %.not, label %common.ret20, label %4

common.ret20:                                     ; preds = %1, %tailrecurse, %10
  %common.ret20.op = phi i32 [ %16, %10 ], [ -1000000010, %tailrecurse ], [ -1000000010, %1 ]
  ret i32 %common.ret20.op

10:                                               ; preds = %4
  %11 = getelementptr inbounds [1500300 x i32], ptr @val, i64 0, i64 %5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  %12 = getelementptr inbounds [1500300 x [2 x i32]], ptr @tree, i64 0, i64 %5, i64 1
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = tail call noundef i32 @_Z4PreYi(i32 noundef %13)
  store i32 %14, ptr %2, align 4, !tbaa !5
  %15 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %11, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %16 = load i32, ptr %15, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  br label %common.ret20
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

attributes #0 = { mustprogress 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 = { 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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass