; LLVM IR from Thre4dripper/DSA-Programs :: 05. Doubly Linked Lists/Searching.ll (Z6searchiP4NodeS0_i)

; 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, ptr, ptr }

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z6searchiP4NodeS0_i(i32 noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i8, align 1
  %10 = alloca ptr, align 8
  store i32 %0, ptr %5, align 4, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !9
  store i32 %3, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %9) #2
  store i8 0, ptr %9, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %11 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %11, ptr %10, align 8, !tbaa !9
  br label %12

12:                                               ; preds = %26, %4
  %13 = load ptr, ptr %10, align 8, !tbaa !9
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %27

15:                                               ; preds = %12
  %16 = load ptr, ptr %10, align 8, !tbaa !9
  %17 = getelementptr inbounds %struct.Node, ptr %16, i32 0, i32 0
  %18 = load i32, ptr %17, align 8, !tbaa !13
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = icmp eq i32 %18, %19
  br i1 %20, label %21, label %22

21:                                               ; preds = %15
  store i8 1, ptr %9, align 1, !tbaa !11
  br label %27

22:                                               ; preds = %15
  %23 = load ptr, ptr %10, align 8, !tbaa !9
  %24 = getelementptr inbounds %struct.Node, ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !15
  store ptr %25, ptr %10, align 8, !tbaa !9
  br label %26

26:                                               ; preds = %22
  br label %12, !llvm.loop !16

27:                                               ; preds = %21, %12
  %28 = load i8, ptr %9, align 1, !tbaa !11, !range !18, !noundef !19
  %29 = trunc i8 %28 to i1
  %30 = zext i1 %29 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 1, ptr %9) #2
  ret i32 %30
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = !{!14, !6, i64 0}
!14 = !{!"_ZTS4Node", !6, i64 0, !10, i64 8, !10, i64 16}
!15 = !{!14, !10, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}
!18 = !{i8 0, i8 2}
!19 = !{}


; 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 range(i32 0, 2) i32 @_Z6searchiP4NodeS0_i(i32 noundef %0, ptr noundef readonly %1, ptr nocapture noundef readnone %2, i32 noundef %3) local_unnamed_addr #0 {
  %.not6.not = icmp eq ptr %1, null
  br i1 %.not6.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %7
  %.07 = phi ptr [ %9, %7 ], [ %1, %4 ]
  %5 = load i32, ptr %.07, align 8, !tbaa !5
  %6 = icmp eq i32 %5, %0
  br i1 %6, label %._crit_edge.loopexit, label %7

7:                                                ; preds = %.lr.ph
  %8 = getelementptr inbounds i8, ptr %.07, i64 8
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %.not.not = icmp eq ptr %9, null
  br i1 %.not.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !12

._crit_edge.loopexit:                             ; preds = %.lr.ph, %7
  %10 = zext i1 %6 to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %4
  %.not.lcssa = phi i32 [ 0, %4 ], [ %10, %._crit_edge.loopexit ]
  ret i32 %.not.lcssa
}

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, !7, i64 0}
!6 = !{!"_ZTS4Node", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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