; LLVM IR from thuhcsi/Crystal.TTVS :: TinyXML/tinyxml.ll (ZN9TiXmlNode10FirstChildEPKc)

; 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"

%class.TiXmlNode = type { %class.TiXmlBase, ptr, i32, ptr, ptr, %class.TiXmlString, ptr, ptr }
%class.TiXmlBase = type { ptr, %struct.TiXmlCursor, ptr }
%struct.TiXmlCursor = type { i32, i32 }
%class.TiXmlString = type { ptr, i64, i64 }

; 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 nonnull align 8 dereferenceable(24) ptr @_ZNK9TiXmlNode6SValueEv(ptr noundef nonnull align 8 dereferenceable(96)) #1 align 2

declare noundef zeroext i1 @_ZNK11TiXmlStringeqEPKc(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZN9TiXmlNode10FirstChildEPKc(ptr noundef nonnull align 8 dereferenceable(96) %0, ptr noundef %1) #3 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %8 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %9 = getelementptr inbounds %class.TiXmlNode, ptr %8, i32 0, i32 3
  %10 = load ptr, ptr %9, align 8, !tbaa !9
  store ptr %10, ptr %6, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %22, %2
  %12 = load ptr, ptr %6, align 8, !tbaa !5
  %13 = icmp ne ptr %12, null
  br i1 %13, label %14, label %26

14:                                               ; preds = %11
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNK9TiXmlNode6SValueEv(ptr noundef nonnull align 8 dereferenceable(96) %15)
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = call noundef zeroext i1 @_ZNK11TiXmlStringeqEPKc(ptr noundef nonnull align 8 dereferenceable(24) %16, ptr noundef %17)
  br i1 %18, label %19, label %21

19:                                               ; preds = %14
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %20, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %27

21:                                               ; preds = %14
  br label %22

22:                                               ; preds = %21
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  %24 = getelementptr inbounds %class.TiXmlNode, ptr %23, i32 0, i32 7
  %25 = load ptr, ptr %24, align 8, !tbaa !17
  store ptr %25, ptr %6, align 8, !tbaa !5
  br label %11, !llvm.loop !18

26:                                               ; preds = %11
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %27

27:                                               ; preds = %26, %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  %28 = load ptr, ptr %3, align 8
  ret ptr %28
}

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 = { "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 #3 = { 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" }
attributes #4 = { 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, !6, i64 40}
!10 = !{!"_ZTS9TiXmlNode", !11, i64 0, !6, i64 24, !14, i64 32, !6, i64 40, !6, i64 48, !15, i64 56, !6, i64 80, !6, i64 88}
!11 = !{!"_ZTS9TiXmlBase", !12, i64 8, !6, i64 16}
!12 = !{!"_ZTS11TiXmlCursor", !13, i64 0, !13, i64 4}
!13 = !{!"int", !7, i64 0}
!14 = !{!"_ZTSN9TiXmlNode8NodeTypeE", !7, i64 0}
!15 = !{!"_ZTS11TiXmlString", !6, i64 0, !16, i64 8, !16, i64 16}
!16 = !{!"long", !7, i64 0}
!17 = !{!10, !6, i64 88}
!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 nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNK9TiXmlNode6SValueEv(ptr noundef nonnull align 8 dereferenceable(96)) local_unnamed_addr #0 align 2

declare noundef zeroext i1 @_ZNK11TiXmlStringeqEPKc(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZN9TiXmlNode10FirstChildEPKc(ptr nocapture noundef nonnull readonly align 8 dereferenceable(96) %0, ptr noundef %1) local_unnamed_addr #2 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 40
  %.08 = load ptr, ptr %3, align 8, !tbaa !5
  %.not9 = icmp eq ptr %.08, null
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %6
  %.010 = phi ptr [ %.0, %6 ], [ %.08, %2 ]
  %4 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNK9TiXmlNode6SValueEv(ptr noundef nonnull align 8 dereferenceable(96) %.010)
  %5 = tail call noundef zeroext i1 @_ZNK11TiXmlStringeqEPKc(ptr noundef nonnull align 8 dereferenceable(24) %4, ptr noundef %1)
  br i1 %5, label %._crit_edge, label %6

6:                                                ; preds = %.lr.ph
  %7 = getelementptr inbounds i8, ptr %.010, i64 88
  %.0 = load ptr, ptr %7, align 8, !tbaa !5
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %6, %2
  %.0.lcssa = phi ptr [ null, %2 ], [ null, %6 ], [ %.010, %.lr.ph ]
  ret ptr %.0.lcssa
}

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 = { "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 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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