; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/数据结构/可持久化并查集.ll (Z5queryiiii)

; 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, i32 }

@t = external dso_local global [8400000 x %struct.node], 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 @_Z5queryiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #1 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !5
  store i32 %2, ptr %8, align 4, !tbaa !5
  store i32 %3, ptr %9, align 4, !tbaa !5
  %12 = load i32, ptr %8, align 4, !tbaa !5
  %13 = load i32, ptr %9, align 4, !tbaa !5
  %14 = icmp eq i32 %12, %13
  br i1 %14, label %15, label %17

15:                                               ; preds = %4
  %16 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %16, ptr %5, align 4
  br label %47

17:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %18 = load i32, ptr %8, align 4, !tbaa !5
  %19 = load i32, ptr %9, align 4, !tbaa !5
  %20 = add nsw i32 %18, %19
  %21 = ashr i32 %20, 1
  store i32 %21, ptr %10, align 4, !tbaa !5
  %22 = load i32, ptr %7, align 4, !tbaa !5
  %23 = load i32, ptr %10, align 4, !tbaa !5
  %24 = icmp sle i32 %22, %23
  br i1 %24, label %25, label %35

25:                                               ; preds = %17
  %26 = load i32, ptr %6, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [8400000 x %struct.node], ptr @t, i64 0, i64 %27
  %29 = getelementptr inbounds %struct.node, ptr %28, i32 0, i32 0
  %30 = load i32, ptr %29, align 16, !tbaa !9
  %31 = load i32, ptr %7, align 4, !tbaa !5
  %32 = load i32, ptr %8, align 4, !tbaa !5
  %33 = load i32, ptr %10, align 4, !tbaa !5
  %34 = call noundef i32 @_Z5queryiiii(i32 noundef %30, i32 noundef %31, i32 noundef %32, i32 noundef %33)
  store i32 %34, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %46

35:                                               ; preds = %17
  %36 = load i32, ptr %6, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [8400000 x %struct.node], ptr @t, i64 0, i64 %37
  %39 = getelementptr inbounds %struct.node, ptr %38, i32 0, i32 1
  %40 = load i32, ptr %39, align 4, !tbaa !11
  %41 = load i32, ptr %7, align 4, !tbaa !5
  %42 = load i32, ptr %10, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  %44 = load i32, ptr %9, align 4, !tbaa !5
  %45 = call noundef i32 @_Z5queryiiii(i32 noundef %40, i32 noundef %41, i32 noundef %43, i32 noundef %44)
  store i32 %45, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %46

46:                                               ; preds = %35, %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %47

47:                                               ; preds = %46, %15
  %48 = load i32, ptr %5, align 4
  ret i32 %48
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTS4node", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12}
!11 = !{!10, !6, i64 4}


; 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, i32 }

@t = external dso_local local_unnamed_addr global [8400000 x %struct.node], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z5queryiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = icmp eq i32 %2, %3
  br i1 %5, label %tailrecurse.outer._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %tailrecurse.outer
  %.tr24.ph32 = phi i32 [ %.tr2428, %tailrecurse.outer ], [ %3, %4 ]
  %.tr23.ph31 = phi i32 [ %15, %tailrecurse.outer ], [ %2, %4 ]
  %.tr.ph30 = phi i32 [ %14, %tailrecurse.outer ], [ %0, %4 ]
  br label %6

6:                                                ; preds = %.lr.ph, %tailrecurse
  %.tr2428 = phi i32 [ %.tr24.ph32, %.lr.ph ], [ %8, %tailrecurse ]
  %.tr27 = phi i32 [ %.tr.ph30, %.lr.ph ], [ %11, %tailrecurse ]
  %7 = add nsw i32 %.tr2428, %.tr23.ph31
  %8 = ashr i32 %7, 1
  %.not = icmp slt i32 %8, %1
  %9 = sext i32 %.tr27 to i64
  br i1 %.not, label %tailrecurse.outer, label %tailrecurse

tailrecurse:                                      ; preds = %6
  %10 = getelementptr inbounds [8400000 x %struct.node], ptr @t, i64 0, i64 %9
  %11 = load i32, ptr %10, align 16, !tbaa !5
  %12 = icmp eq i32 %.tr23.ph31, %8
  br i1 %12, label %tailrecurse.outer._crit_edge, label %6

tailrecurse.outer:                                ; preds = %6
  %13 = getelementptr inbounds [8400000 x %struct.node], ptr @t, i64 0, i64 %9, i32 1
  %14 = load i32, ptr %13, align 4, !tbaa !10
  %15 = add nsw i32 %8, 1
  %16 = icmp eq i32 %15, %.tr2428
  br i1 %16, label %tailrecurse.outer._crit_edge, label %.lr.ph

tailrecurse.outer._crit_edge:                     ; preds = %tailrecurse.outer, %tailrecurse, %4
  %.tr.lcssa = phi i32 [ %0, %4 ], [ %11, %tailrecurse ], [ %14, %tailrecurse.outer ]
  ret i32 %.tr.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, 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 0}
!6 = !{!"_ZTS4node", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 4}


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