; LLVM IR from facebookresearch/habitat-sim :: src/deps/tinyxml2/tinyxml2.ll (ZN8tinyxml210XMLElement15DeleteAttributeEPKc)

; 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.tinyxml2::XMLElement" = type { %"class.tinyxml2::XMLNode", i32, ptr }
%"class.tinyxml2::XMLNode" = type { ptr, ptr, ptr, %"class.tinyxml2::StrPair", i32, ptr, ptr, ptr, ptr, ptr, ptr }
%"class.tinyxml2::StrPair" = type { i32, ptr, ptr }
%"class.tinyxml2::XMLAttribute" = type { ptr, %"class.tinyxml2::StrPair", %"class.tinyxml2::StrPair", i32, 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN8tinyxml27XMLUtil11StringEqualEPKcS2_i(ptr noundef, ptr noundef, i32 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZNK8tinyxml212XMLAttribute4NameEv(ptr noundef nonnull align 8 dereferenceable(80)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8tinyxml210XMLElement15DeleteAttributeEPNS_12XMLAttributeE(ptr noundef) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN8tinyxml210XMLElement15DeleteAttributeEPKc(ptr noundef nonnull align 8 dereferenceable(120) %0, ptr noundef %1) #2 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 %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %8 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store ptr null, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %9 = getelementptr inbounds %"class.tinyxml2::XMLElement", ptr %8, i32 0, i32 2
  %10 = load ptr, ptr %9, align 8, !tbaa !9
  store ptr %10, ptr %6, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %38, %2
  %12 = load ptr, ptr %6, align 8, !tbaa !5
  %13 = icmp ne ptr %12, null
  br i1 %13, label %15, label %14

14:                                               ; preds = %11
  store i32 2, ptr %7, align 4
  br label %42

15:                                               ; preds = %11
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = call noundef ptr @_ZNK8tinyxml212XMLAttribute4NameEv(ptr noundef nonnull align 8 dereferenceable(80) %17)
  %19 = call noundef zeroext i1 @_ZN8tinyxml27XMLUtil11StringEqualEPKcS2_i(ptr noundef %16, ptr noundef %18, i32 noundef 2147483647)
  br i1 %19, label %20, label %36

20:                                               ; preds = %15
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = icmp ne ptr %21, null
  br i1 %22, label %23, label %29

23:                                               ; preds = %20
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = getelementptr inbounds %"class.tinyxml2::XMLAttribute", ptr %24, i32 0, i32 4
  %26 = load ptr, ptr %25, align 8, !tbaa !15
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = getelementptr inbounds %"class.tinyxml2::XMLAttribute", ptr %27, i32 0, i32 4
  store ptr %26, ptr %28, align 8, !tbaa !15
  br label %34

29:                                               ; preds = %20
  %30 = load ptr, ptr %6, align 8, !tbaa !5
  %31 = getelementptr inbounds %"class.tinyxml2::XMLAttribute", ptr %30, i32 0, i32 4
  %32 = load ptr, ptr %31, align 8, !tbaa !15
  %33 = getelementptr inbounds %"class.tinyxml2::XMLElement", ptr %8, i32 0, i32 2
  store ptr %32, ptr %33, align 8, !tbaa !9
  br label %34

34:                                               ; preds = %29, %23
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  call void @_ZN8tinyxml210XMLElement15DeleteAttributeEPNS_12XMLAttributeE(ptr noundef %35)
  store i32 2, ptr %7, align 4
  br label %42

36:                                               ; preds = %15
  %37 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %37, ptr %5, align 8, !tbaa !5
  br label %38

38:                                               ; preds = %36
  %39 = load ptr, ptr %6, align 8, !tbaa !5
  %40 = getelementptr inbounds %"class.tinyxml2::XMLAttribute", ptr %39, i32 0, i32 4
  %41 = load ptr, ptr %40, align 8, !tbaa !15
  store ptr %41, ptr %6, align 8, !tbaa !5
  br label %11, !llvm.loop !17

42:                                               ; preds = %34, %14
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %43

43:                                               ; preds = %42
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 = { 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 #3 = { 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 112}
!10 = !{!"_ZTSN8tinyxml210XMLElementE", !11, i64 0, !14, i64 104, !6, i64 112}
!11 = !{!"_ZTSN8tinyxml27XMLNodeE", !6, i64 8, !6, i64 16, !12, i64 24, !13, i64 48, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80, !6, i64 88, !6, i64 96}
!12 = !{!"_ZTSN8tinyxml27StrPairE", !13, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!"int", !7, i64 0}
!14 = !{!"_ZTSN8tinyxml210XMLElement18ElementClosingTypeE", !7, i64 0}
!15 = !{!16, !6, i64 64}
!16 = !{!"_ZTSN8tinyxml212XMLAttributeE", !12, i64 8, !12, i64 32, !13, i64 56, !6, i64 64, !6, i64 72}
!17 = distinct !{!17, !18}
!18 = !{!"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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN8tinyxml27XMLUtil11StringEqualEPKcS2_i(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_ZNK8tinyxml212XMLAttribute4NameEv(ptr noundef nonnull align 8 dereferenceable(80)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN8tinyxml210XMLElement15DeleteAttributeEPNS_12XMLAttributeE(ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN8tinyxml210XMLElement15DeleteAttributeEPKc(ptr nocapture noundef nonnull align 8 dereferenceable(120) %0, ptr noundef %1) local_unnamed_addr #1 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 112
  %.015 = load ptr, ptr %3, align 8, !tbaa !5
  %.not16 = icmp eq ptr %.015, null
  br i1 %.not16, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %4 = tail call noundef ptr @_ZNK8tinyxml212XMLAttribute4NameEv(ptr noundef nonnull align 8 dereferenceable(80) %.015)
  %5 = tail call noundef zeroext i1 @_ZN8tinyxml27XMLUtil11StringEqualEPKcS2_i(ptr noundef %1, ptr noundef %4, i32 noundef 2147483647)
  br i1 %5, label %.lr.ph._crit_edge, label %.lr.ph26

.lr.ph:                                           ; preds = %.lr.ph26
  %6 = tail call noundef ptr @_ZNK8tinyxml212XMLAttribute4NameEv(ptr noundef nonnull align 8 dereferenceable(80) %.0)
  %7 = tail call noundef zeroext i1 @_ZN8tinyxml27XMLUtil11StringEqualEPKcS2_i(ptr noundef %1, ptr noundef %6, i32 noundef 2147483647)
  br i1 %7, label %.lr.ph._crit_edge, label %.lr.ph26, !llvm.loop !9

.lr.ph._crit_edge:                                ; preds = %.lr.ph, %.lr.ph.preheader
  %.018.lcssa = phi ptr [ %.015, %.lr.ph.preheader ], [ %.0, %.lr.ph ]
  %.01117.lcssa = phi ptr [ null, %.lr.ph.preheader ], [ %.01825, %.lr.ph ]
  %.not12 = icmp eq ptr %.01117.lcssa, null
  %8 = getelementptr inbounds i8, ptr %.018.lcssa, i64 64
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = getelementptr inbounds i8, ptr %.01117.lcssa, i64 64
  %.sink = select i1 %.not12, ptr %3, ptr %10
  store ptr %9, ptr %.sink, align 8, !tbaa !5
  tail call void @_ZN8tinyxml210XMLElement15DeleteAttributeEPNS_12XMLAttributeE(ptr noundef nonnull %.018.lcssa)
  br label %.loopexit

.lr.ph26:                                         ; preds = %.lr.ph.preheader, %.lr.ph
  %.01825 = phi ptr [ %.0, %.lr.ph ], [ %.015, %.lr.ph.preheader ]
  %11 = getelementptr inbounds i8, ptr %.01825, i64 64
  %.0 = load ptr, ptr %11, align 8, !tbaa !5
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !9

.loopexit:                                        ; preds = %.lr.ph26, %2, %.lr.ph._crit_edge
  ret void
}

attributes #0 = { inlinehint 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 = { 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"}
!11 = !{!12, !6, i64 64}
!12 = !{!"_ZTSN8tinyxml212XMLAttributeE", !13, i64 8, !13, i64 32, !14, i64 56, !6, i64 64, !6, i64 72}
!13 = !{!"_ZTSN8tinyxml27StrPairE", !14, i64 0, !6, i64 8, !6, i64 16}
!14 = !{!"int", !7, i64 0}


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