; LLVM IR from Samson-Mano/EM_Propogation_simulation :: EM_Propogation_simulation/src/ImGui/imgui_draw.ll (ZN10ImDrawList17_PopUnusedDrawCmdEv)

; 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.ImDrawList = type <{ %struct.ImVector.0, %struct.ImVector.1, %struct.ImVector.2, i32, i32, ptr, ptr, ptr, ptr, %struct.ImVector.3, %struct.ImVector.4, %struct.ImVector, %struct.ImDrawCmdHeader, %struct.ImDrawListSplitter, float, [4 x i8] }>
%struct.ImVector.0 = type { i32, i32, ptr }
%struct.ImVector.1 = type { i32, i32, ptr }
%struct.ImVector.2 = type { i32, i32, ptr }
%struct.ImVector.3 = type { i32, i32, ptr }
%struct.ImVector.4 = type { i32, i32, ptr }
%struct.ImVector = type { i32, i32, ptr }
%struct.ImDrawCmdHeader = type <{ %struct.ImVec4, ptr, i32, [4 x i8] }>
%struct.ImVec4 = type { float, float, float, float }
%struct.ImDrawListSplitter = type { i32, i32, %struct.ImVector.5 }
%struct.ImVector.5 = type { i32, i32, ptr }
%struct.ImDrawCmd = type { %struct.ImVec4, ptr, i32, i32, 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: mustprogress uwtable
define dso_local void @_ZN10ImDrawList17_PopUnusedDrawCmdEv(ptr noundef nonnull align 8 dereferenceable(196) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  br label %6

6:                                                ; preds = %35, %1
  %7 = getelementptr inbounds %struct.ImDrawList, ptr %5, i32 0, i32 0
  %8 = getelementptr inbounds %struct.ImVector.0, ptr %7, i32 0, i32 0
  %9 = load i32, ptr %8, align 8, !tbaa !9
  %10 = icmp sgt i32 %9, 0
  br i1 %10, label %11, label %36

11:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %12 = getelementptr inbounds %struct.ImDrawList, ptr %5, i32 0, i32 0
  %13 = getelementptr inbounds %struct.ImVector.0, ptr %12, i32 0, i32 2
  %14 = load ptr, ptr %13, align 8, !tbaa !23
  %15 = getelementptr inbounds %struct.ImDrawList, ptr %5, i32 0, i32 0
  %16 = getelementptr inbounds %struct.ImVector.0, ptr %15, i32 0, i32 0
  %17 = load i32, ptr %16, align 8, !tbaa !9
  %18 = sub nsw i32 %17, 1
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds %struct.ImDrawCmd, ptr %14, i64 %19
  store ptr %20, ptr %3, align 8, !tbaa !5
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.ImDrawCmd, ptr %21, i32 0, i32 4
  %23 = load i32, ptr %22, align 8, !tbaa !24
  %24 = icmp ne i32 %23, 0
  br i1 %24, label %30, label %25

25:                                               ; preds = %11
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.ImDrawCmd, ptr %26, i32 0, i32 5
  %28 = load ptr, ptr %27, align 8, !tbaa !26
  %29 = icmp ne ptr %28, null
  br i1 %29, label %30, label %31

30:                                               ; preds = %25, %11
  store i32 1, ptr %4, align 4
  br label %33

31:                                               ; preds = %25
  %32 = getelementptr inbounds %struct.ImDrawList, ptr %5, i32 0, i32 0
  call void @_ZN8ImVectorI9ImDrawCmdE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(16) %32)
  store i32 0, ptr %4, align 4
  br label %33

33:                                               ; preds = %31, %30
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  %34 = load i32, ptr %4, align 4
  switch i32 %34, label %37 [
    i32 0, label %35
    i32 1, label %36
  ]

35:                                               ; preds = %33
  br label %6, !llvm.loop !27

36:                                               ; preds = %33, %6
  ret void

37:                                               ; preds = %33
  unreachable
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN8ImVectorI9ImDrawCmdE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(16)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #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, !12, i64 0}
!10 = !{!"_ZTS10ImDrawList", !11, i64 0, !13, i64 16, !14, i64 32, !12, i64 48, !12, i64 52, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80, !15, i64 88, !16, i64 104, !17, i64 120, !18, i64 136, !21, i64 168, !20, i64 192}
!11 = !{!"_ZTS8ImVectorI9ImDrawCmdE", !12, i64 0, !12, i64 4, !6, i64 8}
!12 = !{!"int", !7, i64 0}
!13 = !{!"_ZTS8ImVectorItE", !12, i64 0, !12, i64 4, !6, i64 8}
!14 = !{!"_ZTS8ImVectorI10ImDrawVertE", !12, i64 0, !12, i64 4, !6, i64 8}
!15 = !{!"_ZTS8ImVectorI6ImVec4E", !12, i64 0, !12, i64 4, !6, i64 8}
!16 = !{!"_ZTS8ImVectorIPvE", !12, i64 0, !12, i64 4, !6, i64 8}
!17 = !{!"_ZTS8ImVectorI6ImVec2E", !12, i64 0, !12, i64 4, !6, i64 8}
!18 = !{!"_ZTS15ImDrawCmdHeader", !19, i64 0, !6, i64 16, !12, i64 24}
!19 = !{!"_ZTS6ImVec4", !20, i64 0, !20, i64 4, !20, i64 8, !20, i64 12}
!20 = !{!"float", !7, i64 0}
!21 = !{!"_ZTS18ImDrawListSplitter", !12, i64 0, !12, i64 4, !22, i64 8}
!22 = !{!"_ZTS8ImVectorI13ImDrawChannelE", !12, i64 0, !12, i64 4, !6, i64 8}
!23 = !{!10, !6, i64 8}
!24 = !{!25, !12, i64 32}
!25 = !{!"_ZTS9ImDrawCmd", !19, i64 0, !6, i64 16, !12, i64 24, !12, i64 28, !12, i64 32, !6, i64 40, !6, i64 48}
!26 = !{!25, !6, i64 40}
!27 = distinct !{!27, !28}
!28 = !{!"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.ImDrawCmd = type { %struct.ImVec4, ptr, i32, i32, i32, ptr, ptr }
%struct.ImVec4 = type { float, float, float, float }

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN10ImDrawList17_PopUnusedDrawCmdEv(ptr noundef nonnull align 8 dereferenceable(196) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load i32, ptr %0, align 8, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph, label %.thread

.lr.ph:                                           ; preds = %1, %14
  %5 = phi i32 [ %15, %14 ], [ %3, %1 ]
  %6 = load ptr, ptr %2, align 8, !tbaa !22
  %7 = zext nneg i32 %5 to i64
  %8 = getelementptr %struct.ImDrawCmd, ptr %6, i64 %7
  %9 = getelementptr i8, ptr %8, i64 -24
  %10 = load i32, ptr %9, align 8, !tbaa !23
  %.not = icmp eq i32 %10, 0
  br i1 %.not, label %11, label %.thread

11:                                               ; preds = %.lr.ph
  %12 = getelementptr i8, ptr %8, i64 -16
  %13 = load ptr, ptr %12, align 8, !tbaa !25
  %.not4 = icmp eq ptr %13, null
  br i1 %.not4, label %14, label %.thread

14:                                               ; preds = %11
  tail call void @_ZN8ImVectorI9ImDrawCmdE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(16) %0)
  %15 = load i32, ptr %0, align 8, !tbaa !5
  %16 = icmp sgt i32 %15, 0
  br i1 %16, label %.lr.ph, label %.thread

.thread:                                          ; preds = %14, %11, %.lr.ph, %1
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN8ImVectorI9ImDrawCmdE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #1 align 2

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 = { 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" }

!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, !8, i64 0}
!6 = !{!"_ZTS10ImDrawList", !7, i64 0, !12, i64 16, !13, i64 32, !8, i64 48, !8, i64 52, !11, i64 56, !11, i64 64, !11, i64 72, !11, i64 80, !14, i64 88, !15, i64 104, !16, i64 120, !17, i64 136, !20, i64 168, !19, i64 192}
!7 = !{!"_ZTS8ImVectorI9ImDrawCmdE", !8, i64 0, !8, i64 4, !11, i64 8}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"any pointer", !9, i64 0}
!12 = !{!"_ZTS8ImVectorItE", !8, i64 0, !8, i64 4, !11, i64 8}
!13 = !{!"_ZTS8ImVectorI10ImDrawVertE", !8, i64 0, !8, i64 4, !11, i64 8}
!14 = !{!"_ZTS8ImVectorI6ImVec4E", !8, i64 0, !8, i64 4, !11, i64 8}
!15 = !{!"_ZTS8ImVectorIPvE", !8, i64 0, !8, i64 4, !11, i64 8}
!16 = !{!"_ZTS8ImVectorI6ImVec2E", !8, i64 0, !8, i64 4, !11, i64 8}
!17 = !{!"_ZTS15ImDrawCmdHeader", !18, i64 0, !11, i64 16, !8, i64 24}
!18 = !{!"_ZTS6ImVec4", !19, i64 0, !19, i64 4, !19, i64 8, !19, i64 12}
!19 = !{!"float", !9, i64 0}
!20 = !{!"_ZTS18ImDrawListSplitter", !8, i64 0, !8, i64 4, !21, i64 8}
!21 = !{!"_ZTS8ImVectorI13ImDrawChannelE", !8, i64 0, !8, i64 4, !11, i64 8}
!22 = !{!6, !11, i64 8}
!23 = !{!24, !8, i64 32}
!24 = !{!"_ZTS9ImDrawCmd", !18, i64 0, !11, i64 16, !8, i64 24, !8, i64 28, !8, i64 32, !11, i64 40, !11, i64 48}
!25 = !{!24, !11, i64 40}


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