; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/数据结构/Treap.ll (Z5rank2P4nodei)

; 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 { [2 x ptr], i32, i32, i32 }

@nil = external dso_local global ptr, align 8

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z5rank2P4nodei(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 = load ptr, ptr @nil, align 8, !tbaa !5
  %8 = icmp eq ptr %6, %7
  br i1 %8, label %9, label %10

9:                                                ; preds = %2
  store i32 1, ptr %3, align 4
  br label %38

10:                                               ; preds = %2
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.node, ptr %12, i32 0, i32 2
  %14 = load i32, ptr %13, align 4, !tbaa !11
  %15 = icmp sge i32 %11, %14
  br i1 %15, label %16, label %31

16:                                               ; preds = %10
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.node, ptr %17, i32 0, i32 0
  %19 = getelementptr inbounds [2 x ptr], ptr %18, i64 0, i64 1
  %20 = load ptr, ptr %19, align 8, !tbaa !5
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = call noundef i32 @_Z5rank2P4nodei(ptr noundef %20, i32 noundef %21)
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.node, ptr %23, i32 0, i32 0
  %25 = getelementptr inbounds [2 x ptr], ptr %24, i64 0, i64 0
  %26 = load ptr, ptr %25, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.node, ptr %26, i32 0, i32 3
  %28 = load i32, ptr %27, align 8, !tbaa !13
  %29 = add nsw i32 %22, %28
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %3, align 4
  br label %38

31:                                               ; preds = %10
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.node, ptr %32, i32 0, i32 0
  %34 = getelementptr inbounds [2 x ptr], ptr %33, i64 0, i64 0
  %35 = load ptr, ptr %34, align 8, !tbaa !5
  %36 = load i32, ptr %5, align 4, !tbaa !9
  %37 = call noundef i32 @_Z5rank2P4nodei(ptr noundef %35, i32 noundef %36)
  store i32 %37, ptr %3, align 4
  br label %38

38:                                               ; preds = %31, %16, %9
  %39 = load i32, ptr %3, align 4
  ret i32 %39
}

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, !10, i64 20}
!12 = !{!"_ZTS4node", !7, i64 0, !10, i64 16, !10, i64 20, !10, i64 24}
!13 = !{!12, !10, i64 24}


; 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"

@nil = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z5rank2P4nodei(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load ptr, ptr @nil, align 8, !tbaa !5
  %4 = icmp eq ptr %3, %0
  br i1 %4, label %common.ret18, label %.lr.ph

.lr.ph:                                           ; preds = %2, %tailrecurse
  %.tr12 = phi ptr [ %16, %tailrecurse ], [ %0, %2 ]
  %5 = getelementptr inbounds i8, ptr %.tr12, i64 20
  %6 = load i32, ptr %5, align 4, !tbaa !9
  %.not = icmp sgt i32 %6, %1
  br i1 %.not, label %tailrecurse, label %7

common.ret18:                                     ; preds = %2, %tailrecurse, %7
  %common.ret18.op = phi i32 [ %15, %7 ], [ 1, %tailrecurse ], [ 1, %2 ]
  ret i32 %common.ret18.op

7:                                                ; preds = %.lr.ph
  %8 = getelementptr inbounds i8, ptr %.tr12, i64 8
  %9 = load ptr, ptr %8, align 8, !tbaa !5
  %10 = tail call noundef i32 @_Z5rank2P4nodei(ptr noundef %9, i32 noundef %1)
  %11 = load ptr, ptr %.tr12, align 8, !tbaa !5
  %12 = getelementptr inbounds i8, ptr %11, i64 24
  %13 = load i32, ptr %12, align 8, !tbaa !12
  %14 = add i32 %10, 1
  %15 = add i32 %14, %13
  br label %common.ret18

tailrecurse:                                      ; preds = %.lr.ph
  %16 = load ptr, ptr %.tr12, align 8, !tbaa !5
  %17 = icmp eq ptr %3, %16
  br i1 %17, label %common.ret18, label %.lr.ph
}

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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 20}
!10 = !{!"_ZTS4node", !7, i64 0, !11, i64 16, !11, i64 20, !11, i64 24}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 24}


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