; LLVM IR from mitdbg/deneva :: storage/index_btree.ll (ZN11index_btree12leaf_has_keyEP7bt_nodem)

; 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.bt_node = type { ptr, i8, ptr, ptr, i32, ptr, i8, %union.pthread_mutex_t, i32, i32 }
%union.pthread_mutex_t = type { %struct.__pthread_mutex_s }
%struct.__pthread_mutex_s = type { i32, i32, i32, i32, i32, i16, i16, %struct.__pthread_internal_list }
%struct.__pthread_internal_list = type { ptr, ptr }

; 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 nounwind uwtable
define dso_local noundef i32 @_ZN11index_btree12leaf_has_keyEP7bt_nodem(ptr noundef nonnull align 8 dereferenceable(56) %0, ptr noundef %1, i64 noundef %2) #1 align 2 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !9
  %10 = load ptr, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !11
  br label %11

11:                                               ; preds = %31, %3
  %12 = load i32, ptr %8, align 4, !tbaa !11
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.bt_node, ptr %13, i32 0, i32 4
  %15 = load i32, ptr %14, align 8, !tbaa !13
  %16 = icmp ult i32 %12, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %11
  store i32 2, ptr %9, align 4
  br label %34

18:                                               ; preds = %11
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.bt_node, ptr %19, i32 0, i32 2
  %21 = load ptr, ptr %20, align 8, !tbaa !17
  %22 = load i32, ptr %8, align 4, !tbaa !11
  %23 = zext i32 %22 to i64
  %24 = getelementptr inbounds i64, ptr %21, i64 %23
  %25 = load i64, ptr %24, align 8, !tbaa !9
  %26 = load i64, ptr %7, align 8, !tbaa !9
  %27 = icmp eq i64 %25, %26
  br i1 %27, label %28, label %30

28:                                               ; preds = %18
  %29 = load i32, ptr %8, align 4, !tbaa !11
  store i32 %29, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %34

30:                                               ; preds = %18
  br label %31

31:                                               ; preds = %30
  %32 = load i32, ptr %8, align 4, !tbaa !11
  %33 = add i32 %32, 1
  store i32 %33, ptr %8, align 4, !tbaa !11
  br label %11, !llvm.loop !18

34:                                               ; preds = %28, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %35 = load i32, ptr %9, align 4
  switch i32 %35, label %39 [
    i32 2, label %36
    i32 1, label %37
  ]

36:                                               ; preds = %34
  store i32 -1, ptr %4, align 4
  br label %37

37:                                               ; preds = %36, %34
  %38 = load i32, ptr %4, align 4
  ret i32 %38

39:                                               ; preds = %34
  unreachable
}

attributes #0 = { 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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !12, i64 32}
!14 = !{!"_ZTS7bt_node", !6, i64 0, !15, i64 8, !6, i64 16, !6, i64 24, !12, i64 32, !6, i64 40, !15, i64 48, !7, i64 56, !16, i64 96, !12, i64 100}
!15 = !{!"bool", !7, i64 0}
!16 = !{!"_ZTS7latch_t", !7, i64 0}
!17 = !{!14, !6, i64 16}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.mustprogress"}


; 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_ZN11index_btree12leaf_has_keyEP7bt_nodem(ptr nocapture noundef nonnull readnone align 8 dereferenceable(56) %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 align 2 {
  %4 = getelementptr inbounds i8, ptr %1, i64 32
  %5 = load i32, ptr %4, align 8, !tbaa !5
  %.not11.not = icmp eq i32 %5, 0
  br i1 %.not11.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %6 = getelementptr inbounds i8, ptr %1, i64 16
  %7 = load ptr, ptr %6, align 8, !tbaa !13
  %wide.trip.count = zext i32 %5 to i64
  br label %8

8:                                                ; preds = %.lr.ph, %12
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %12 ]
  %9 = getelementptr inbounds i64, ptr %7, i64 %indvars.iv
  %10 = load i64, ptr %9, align 8, !tbaa !14
  %11 = icmp eq i64 %10, %2
  br i1 %11, label %._crit_edge.loopexit.split.loop.exit, label %12

12:                                               ; preds = %8
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %8, !llvm.loop !16

._crit_edge.loopexit.split.loop.exit:             ; preds = %8
  %13 = trunc nuw i64 %indvars.iv to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %12, %._crit_edge.loopexit.split.loop.exit, %3
  %spec.select = phi i32 [ -1, %3 ], [ %13, %._crit_edge.loopexit.split.loop.exit ], [ -1, %12 ]
  ret i32 %spec.select
}

attributes #0 = { mustprogress nofree norecurse 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, !11, i64 32}
!6 = !{!"_ZTS7bt_node", !7, i64 0, !10, i64 8, !7, i64 16, !7, i64 24, !11, i64 32, !7, i64 40, !10, i64 48, !8, i64 56, !12, i64 96, !11, i64 100}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"bool", !8, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = !{!"_ZTS7latch_t", !8, i64 0}
!13 = !{!6, !7, i64 16}
!14 = !{!15, !15, i64 0}
!15 = !{!"long", !8, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass