; LLVM IR from modlfo/AudioEngine :: AudioEngine/JuceLibraryCode/juce_audio_basics.ll (ZNK4juce10MidiBuffer12getNumEventsEv)

; 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.juce::MidiBuffer" = type { %"class.juce::Array" }
%"class.juce::Array" = type { %"class.juce::ArrayAllocationBase", i32, [4 x i8] }
%"class.juce::ArrayAllocationBase" = type <{ %"class.juce::HeapBlock", i32, [4 x i8] }>
%"class.juce::HeapBlock" = type { 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 ptr @_ZNK4juce5ArrayIhNS_20DummyCriticalSectionELi0EE5beginEv(ptr noundef nonnull align 8 dereferenceable(20)) #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK4juce5ArrayIhNS_20DummyCriticalSectionELi0EE3endEv(ptr noundef nonnull align 8 dereferenceable(20)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZNK4juce10MidiBuffer12getNumEventsEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %6 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %7 = getelementptr inbounds %"class.juce::MidiBuffer", ptr %6, i32 0, i32 0
  %8 = call noundef ptr @_ZNK4juce5ArrayIhNS_20DummyCriticalSectionELi0EE3endEv(ptr noundef nonnull align 8 dereferenceable(20) %7) #3
  store ptr %8, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %9 = getelementptr inbounds %"class.juce::MidiBuffer", ptr %6, i32 0, i32 0
  %10 = call noundef ptr @_ZNK4juce5ArrayIhNS_20DummyCriticalSectionELi0EE5beginEv(ptr noundef nonnull align 8 dereferenceable(20) %9) #3
  store ptr %10, ptr %5, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %23, %1
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = icmp ult ptr %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %26

16:                                               ; preds = %11
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = call noundef zeroext i16 @_ZN4juce17MidiBufferHelpers17getEventTotalSizeEPKv(ptr noundef %17) #3
  %19 = zext i16 %18 to i32
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = sext i32 %19 to i64
  %22 = getelementptr inbounds i8, ptr %20, i64 %21
  store ptr %22, ptr %5, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %16
  %24 = load i32, ptr %3, align 4, !tbaa !9
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %3, align 4, !tbaa !9
  br label %11, !llvm.loop !11

26:                                               ; preds = %15
  %27 = load i32, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret i32 %27
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i16 @_ZN4juce17MidiBufferHelpers17getEventTotalSizeEPKv(ptr noundef) #1

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 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 #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, !10, i64 0}
!10 = !{!"int", !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"

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK4juce5ArrayIhNS_20DummyCriticalSectionELi0EE5beginEv(ptr noundef nonnull align 8 dereferenceable(20)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNK4juce5ArrayIhNS_20DummyCriticalSectionELi0EE3endEv(ptr noundef nonnull align 8 dereferenceable(20)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZNK4juce10MidiBuffer12getNumEventsEv(ptr noundef nonnull align 8 dereferenceable(24) %0) local_unnamed_addr #1 align 2 {
  %2 = tail call noundef ptr @_ZNK4juce5ArrayIhNS_20DummyCriticalSectionELi0EE3endEv(ptr noundef nonnull align 8 dereferenceable(20) %0) #2
  %3 = tail call noundef ptr @_ZNK4juce5ArrayIhNS_20DummyCriticalSectionELi0EE5beginEv(ptr noundef nonnull align 8 dereferenceable(20) %0) #2
  %4 = icmp ult ptr %3, %2
  br i1 %4, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.06.lcssa = phi i32 [ 0, %1 ], [ %8, %.lr.ph ]
  ret i32 %.06.lcssa

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.08 = phi ptr [ %7, %.lr.ph ], [ %3, %1 ]
  %.067 = phi i32 [ %8, %.lr.ph ], [ 0, %1 ]
  %5 = tail call noundef zeroext i16 @_ZN4juce17MidiBufferHelpers17getEventTotalSizeEPKv(ptr noundef %.08) #2
  %6 = zext i16 %5 to i64
  %7 = getelementptr inbounds i8, ptr %.08, i64 %6
  %8 = add nuw nsw i32 %.067, 1
  %9 = icmp ult ptr %7, %2
  br i1 %9, label %.lr.ph, label %._crit_edge, !llvm.loop !5
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i16 @_ZN4juce17MidiBufferHelpers17getEventTotalSizeEPKv(ptr noundef) local_unnamed_addr #0

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 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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