; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/数据结构/可持久化Treap.ll (ZN5treap4RankEPNS_4nodeEi)

; 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.treap::node" = type { ptr, ptr, i32, i32 }

@_ZN5treap3nilE = external dso_local global ptr, align 8

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN5treap4RankEPNS_4nodeEi(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 @_ZN5treap3nilE, 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 %35

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.treap::node", ptr %12, i32 0, i32 2
  %14 = load i32, ptr %13, align 8, !tbaa !11
  %15 = icmp sle i32 %11, %14
  br i1 %15, label %16, label %22

16:                                               ; preds = %10
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds %"struct.treap::node", ptr %17, i32 0, i32 0
  %19 = load ptr, ptr %18, align 8, !tbaa !13
  %20 = load i32, ptr %5, align 4, !tbaa !9
  %21 = call noundef i32 @_ZN5treap4RankEPNS_4nodeEi(ptr noundef %19, i32 noundef %20)
  store i32 %21, ptr %3, align 4
  br label %35

22:                                               ; preds = %10
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %"struct.treap::node", ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !14
  %26 = load i32, ptr %5, align 4, !tbaa !9
  %27 = call noundef i32 @_ZN5treap4RankEPNS_4nodeEi(ptr noundef %25, i32 noundef %26)
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds %"struct.treap::node", ptr %28, i32 0, i32 0
  %30 = load ptr, ptr %29, align 8, !tbaa !13
  %31 = getelementptr inbounds %"struct.treap::node", ptr %30, i32 0, i32 3
  %32 = load i32, ptr %31, align 4, !tbaa !15
  %33 = add nsw i32 %27, %32
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %3, align 4
  br label %35

35:                                               ; preds = %22, %16, %9
  %36 = load i32, ptr %3, align 4
  ret i32 %36
}

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 16}
!12 = !{!"_ZTSN5treap4nodeE", !6, i64 0, !6, i64 8, !10, i64 16, !10, i64 20}
!13 = !{!12, !6, i64 0}
!14 = !{!12, !6, i64 8}
!15 = !{!12, !10, i64 20}


; 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"

@_ZN5treap3nilE = 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 @_ZN5treap4RankEPNS_4nodeEi(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load ptr, ptr @_ZN5treap3nilE, 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 [ %7, %tailrecurse ], [ %0, %2 ]
  %5 = getelementptr inbounds i8, ptr %.tr12, i64 16
  %6 = load i32, ptr %5, align 8, !tbaa !9
  %.not = icmp slt i32 %6, %1
  br i1 %.not, label %9, label %tailrecurse

tailrecurse:                                      ; preds = %.lr.ph
  %7 = load ptr, ptr %.tr12, align 8, !tbaa !12
  %8 = icmp eq ptr %3, %7
  br i1 %8, label %common.ret18, label %.lr.ph

common.ret18:                                     ; preds = %2, %tailrecurse, %9
  %common.ret18.op = phi i32 [ %17, %9 ], [ 1, %tailrecurse ], [ 1, %2 ]
  ret i32 %common.ret18.op

9:                                                ; preds = %.lr.ph
  %10 = getelementptr inbounds i8, ptr %.tr12, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !13
  %12 = tail call noundef i32 @_ZN5treap4RankEPNS_4nodeEi(ptr noundef %11, i32 noundef %1)
  %13 = load ptr, ptr %.tr12, align 8, !tbaa !12
  %14 = getelementptr inbounds i8, ptr %13, i64 20
  %15 = load i32, ptr %14, align 4, !tbaa !14
  %16 = add i32 %12, 1
  %17 = add i32 %16, %15
  br label %common.ret18
}

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 16}
!10 = !{!"_ZTSN5treap4nodeE", !6, i64 0, !6, i64 8, !11, i64 16, !11, i64 20}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 0}
!13 = !{!10, !6, i64 8}
!14 = !{!10, !11, i64 20}


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