; LLVM IR from Simple-XX/SimpleKernel :: src/drv/dtb/dtb.ll (ZN3DTB18find_node_via_pathEPKc)

; 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.DTB::node_t" = type { %"struct.DTB::path_t", ptr, ptr, ptr, i32, i32, i32, i32, i8, [16 x %"struct.DTB::prop_t"], i64 }
%"struct.DTB::path_t" = type { [16 x ptr], i64 }
%"struct.DTB::prop_t" = type { ptr, i64, i64 }

@_ZN3DTB5nodesE = external dso_local global [128 x %"struct.DTB::node_t"], align 16
@_ZN3DTB6node_t5countE = external dso_local global i64, align 8

; 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
declare dso_local noundef zeroext i1 @_ZN3DTB6path_teqEPKc(ptr noundef nonnull align 8 dereferenceable(136), ptr noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZN3DTB18find_node_via_pathEPKc(ptr noundef nonnull align 1 dereferenceable(1) %0, ptr noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store ptr null, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %8

8:                                                ; preds = %23, %2
  %9 = load i64, ptr %6, align 8, !tbaa !9
  %10 = load i64, ptr @_ZN3DTB6node_t5countE, align 8, !tbaa !9
  %11 = icmp ult i64 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %26

13:                                               ; preds = %8
  %14 = load i64, ptr %6, align 8, !tbaa !9
  %15 = getelementptr inbounds [128 x %"struct.DTB::node_t"], ptr @_ZN3DTB5nodesE, i64 0, i64 %14
  %16 = getelementptr inbounds %"struct.DTB::node_t", ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = call noundef zeroext i1 @_ZN3DTB6path_teqEPKc(ptr noundef nonnull align 8 dereferenceable(136) %16, ptr noundef %17)
  br i1 %18, label %19, label %22

19:                                               ; preds = %13
  %20 = load i64, ptr %6, align 8, !tbaa !9
  %21 = getelementptr inbounds [128 x %"struct.DTB::node_t"], ptr @_ZN3DTB5nodesE, i64 0, i64 %20
  store ptr %21, ptr %5, align 8, !tbaa !5
  br label %22

22:                                               ; preds = %19, %13
  br label %23

23:                                               ; preds = %22
  %24 = load i64, ptr %6, align 8, !tbaa !9
  %25 = add i64 %24, 1
  store i64 %25, ptr %6, align 8, !tbaa !9
  br label %8, !llvm.loop !11

26:                                               ; preds = %12
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret ptr %27
}

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 = distinct !{!11, !12}
!12 = !{!"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"

%"struct.DTB::node_t" = type { %"struct.DTB::path_t", ptr, ptr, ptr, i32, i32, i32, i32, i8, [16 x %"struct.DTB::prop_t"], i64 }
%"struct.DTB::path_t" = type { [16 x ptr], i64 }
%"struct.DTB::prop_t" = type { ptr, i64, i64 }

@_ZN3DTB5nodesE = external dso_local global [128 x %"struct.DTB::node_t"], align 16
@_ZN3DTB6node_t5countE = external dso_local local_unnamed_addr global i64, align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN3DTB6path_teqEPKc(ptr noundef nonnull align 8 dereferenceable(136), ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZN3DTB18find_node_via_pathEPKc(ptr nocapture noundef nonnull readnone align 1 dereferenceable(1) %0, ptr noundef %1) local_unnamed_addr #0 align 2 {
  %3 = load i64, ptr @_ZN3DTB6node_t5countE, align 8, !tbaa !5
  %.not = icmp eq i64 %3, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.06.lcssa = phi ptr [ null, %2 ], [ %spec.select, %.lr.ph ]
  ret ptr %.06.lcssa

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.08 = phi i64 [ %6, %.lr.ph ], [ 0, %2 ]
  %.067 = phi ptr [ %spec.select, %.lr.ph ], [ null, %2 ]
  %4 = getelementptr inbounds [128 x %"struct.DTB::node_t"], ptr @_ZN3DTB5nodesE, i64 0, i64 %.08
  %5 = tail call noundef zeroext i1 @_ZN3DTB6path_teqEPKc(ptr noundef nonnull align 8 dereferenceable(136) %4, ptr noundef %1)
  %spec.select = select i1 %5, ptr %4, ptr %.067
  %6 = add nuw i64 %.08, 1
  %7 = load i64, ptr @_ZN3DTB6node_t5countE, align 8, !tbaa !5
  %8 = icmp ult i64 %6, %7
  br i1 %8, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

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" }

!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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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