; LLVM IR from gem5/gem5 :: ext/mcpat/xmlParser.ll (ZN7XMLNode18getChildNodeByPathEPKccc)

; 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.XMLNode = type { ptr }

; Function Attrs: nounwind
declare void @free(ptr noundef) #0

; 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

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_Z9stringDupPKci(ptr noundef, i32 noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7XMLNode18getChildNodeByPathEPKccc(ptr dead_on_unwind noalias writable sret(%struct.XMLNode) align 8 %0, ptr noundef nonnull align 8 dereferenceable(8) %1, ptr noundef %2, i8 noundef signext %3, i8 noundef signext %4) #2 align 2 {
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i8, align 1
  %10 = alloca i8, align 1
  %11 = alloca ptr, align 8
  %12 = alloca i1, align 1
  store ptr %0, ptr %6, align 8
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i8 %3, ptr %9, align 1, !tbaa !9
  store i8 %4, ptr %10, align 1, !tbaa !9
  %13 = load ptr, ptr %7, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  %14 = load ptr, ptr %8, align 8, !tbaa !5
  %15 = call noundef ptr @_Z9stringDupPKci(ptr noundef %14, i32 noundef -1)
  store ptr %15, ptr %11, align 8, !tbaa !5
  store i1 false, ptr %12, align 1
  %16 = load ptr, ptr %11, align 8, !tbaa !5
  %17 = load i8, ptr %9, align 1, !tbaa !9
  %18 = load i8, ptr %10, align 1, !tbaa !9
  call void @_ZN7XMLNode26getChildNodeByPathNonConstEPccc(ptr dead_on_unwind writable sret(%struct.XMLNode) align 8 %0, ptr noundef nonnull align 8 dereferenceable(8) %13, ptr noundef %16, i8 noundef signext %17, i8 noundef signext %18)
  %19 = load ptr, ptr %11, align 8, !tbaa !5
  %20 = icmp ne ptr %19, null
  br i1 %20, label %21, label %23

21:                                               ; preds = %5
  %22 = load ptr, ptr %11, align 8, !tbaa !5
  call void @free(ptr noundef %22) #3
  br label %23

23:                                               ; preds = %21, %5
  store i1 true, ptr %12, align 1
  %24 = load i1, ptr %12, align 1
  br i1 %24, label %26, label %25

25:                                               ; preds = %23
  call void @_ZN7XMLNodeD1Ev(ptr noundef nonnull align 8 dereferenceable(8) %0) #3
  br label %26

26:                                               ; preds = %25, %23
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7XMLNode26getChildNodeByPathNonConstEPccc(ptr dead_on_unwind noalias writable sret(%struct.XMLNode) align 8, ptr noundef nonnull align 8 dereferenceable(8), ptr noundef, i8 noundef signext, i8 noundef signext) #2 align 2

declare void @_ZN7XMLNodeD1Ev(ptr)

attributes #0 = { nounwind "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 = { 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 = !{!7, !7, i64 0}


; 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.XMLNode = type { ptr }

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_Z9stringDupPKci(ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7XMLNode18getChildNodeByPathEPKccc(ptr dead_on_unwind noalias writable sret(%struct.XMLNode) align 8 %0, ptr noundef nonnull align 8 dereferenceable(8) %1, ptr noundef %2, i8 noundef signext %3, i8 noundef signext %4) local_unnamed_addr #1 align 2 {
  %6 = tail call noundef ptr @_Z9stringDupPKci(ptr noundef %2, i32 noundef -1)
  tail call void @_ZN7XMLNode26getChildNodeByPathNonConstEPccc(ptr dead_on_unwind writable sret(%struct.XMLNode) align 8 %0, ptr noundef nonnull align 8 dereferenceable(8) %1, ptr noundef %6, i8 noundef signext %3, i8 noundef signext %4)
  %.not = icmp eq ptr %6, null
  br i1 %.not, label %8, label %7

7:                                                ; preds = %5
  tail call void @free(ptr noundef nonnull %6) #2
  br label %8

8:                                                ; preds = %5, %7
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7XMLNode26getChildNodeByPathNonConstEPccc(ptr dead_on_unwind noalias writable sret(%struct.XMLNode) align 8, ptr noundef nonnull align 8 dereferenceable(8), ptr noundef, i8 noundef signext, i8 noundef signext) local_unnamed_addr #1 align 2

attributes #0 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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" }
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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass