; LLVM IR from theolundqvist/parallax-voxel-ray-marcher :: src/external/Dear ImGui/imgui.ll (ZN5ImGui13PopStyleColorEi)

; 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.ImGuiContext = type <{ i8, i8, [6 x i8], %struct.ImGuiIO, %struct.ImGuiStyle, ptr, float, float, %struct.ImDrawListSharedData, double, i32, i32, i32, i8, i8, i8, i8, i8, [3 x i8], i32, ptr, %struct.ImVector.3, %struct.ImVector.3, %struct.ImVector.3, %struct.ImVector.4, %struct.ImGuiStorage, i32, %struct.ImVec2, [4 x i8], ptr, ptr, ptr, ptr, ptr, %struct.ImVec2, float, i32, i32, i8, i8, i8, i8, float, float, i32, i32, float, i8, i8, i8, i8, i8, i8, i8, i8, i32, i32, [4 x i8], i64, %struct.ImVec2, ptr, i32, i32, i32, i8, i8, [2 x i8], ptr, i32, float, i32, %struct.ImGuiNextItemData, %struct.ImGuiLastItemData, [4 x i8], %struct.ImGuiNextWindowData, %struct.ImVector.5, %struct.ImVector.6, %struct.ImVector.7, %struct.ImVector.8, %struct.ImVector.9, %struct.ImVector.10, %struct.ImVector.11, %struct.ImVector.11, %struct.ImVector.12, ptr, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, %struct.ImRect, i32, i32, i32, i8, i8, i8, i8, i8, i8, i8, i8, i32, %struct.ImRect, i8, [3 x i8], i32, i32, i32, i32, i32, i32, [4 x i8], %struct.ImGuiNavItemData, %struct.ImGuiNavItemData, %struct.ImGuiNavItemData, ptr, i32, [4 x i8], ptr, ptr, ptr, float, float, i8, [7 x i8], ptr, ptr, i32, i32, i32, i32, i8, [3 x i8], float, i32, i8, i8, i8, i8, i32, i32, i32, [4 x i8], %struct.ImGuiPayload, %struct.ImRect, i32, i32, float, i32, i32, i32, i32, [4 x i8], %struct.ImVector.13, [16 x i8], ptr, i32, [4 x i8], %struct.ImPool, %struct.ImVector.15, %struct.ImVector.16, %struct.ImVector.17, ptr, %struct.ImPool.18, %struct.ImVector.20, %struct.ImVector.21, %struct.ImVec2, %struct.ImGuiInputTextState, %struct.ImFont, i32, i32, float, float, [3 x float], %struct.ImVec4, %struct.ImGuiComboPreviewData, float, i8, i8, [2 x i8], float, float, float, float, i32, float, [4 x i8], %struct.ImVector.2, %struct.ImVector.8, %struct.ImVec2, %struct.ImVec2, i8, i8, [2 x i8], float, %struct.ImGuiTextBuffer, %struct.ImVector.23, %struct.ImChunkStream, %struct.ImChunkStream.24, %struct.ImVector.25, i32, i8, [3 x i8], i32, [4 x i8], ptr, %struct.ImGuiTextBuffer, ptr, ptr, float, i8, [3 x i8], i32, i32, i32, i8, [3 x i8], i32, %struct.ImGuiMetricsConfig, [120 x float], i32, i32, float, i32, i32, i32, [3073 x i8], [3 x i8] }>
%struct.ImGuiIO = type { i32, i32, %struct.ImVec2, float, float, ptr, ptr, float, float, float, [22 x i32], float, float, ptr, ptr, float, i8, ptr, %struct.ImVec2, i8, i8, i8, i8, i8, i8, float, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, %struct.ImVec2, [5 x i8], float, float, i8, i8, i8, i8, [512 x i8], [20 x float], i8, i8, i8, i8, i8, i8, i8, float, i32, i32, i32, i32, i32, %struct.ImVec2, i32, i32, %struct.ImVec2, [5 x %struct.ImVec2], [5 x double], [5 x i8], [5 x i8], [5 x i8], [5 x i8], [5 x i8], [5 x float], [5 x float], [5 x %struct.ImVec2], [5 x float], [512 x float], [512 x float], [20 x float], [20 x float], float, i16, %struct.ImVector }
%struct.ImVector = type { i32, i32, ptr }
%struct.ImGuiStyle = type { float, float, %struct.ImVec2, float, float, %struct.ImVec2, %struct.ImVec2, i32, float, float, float, float, %struct.ImVec2, float, float, %struct.ImVec2, %struct.ImVec2, %struct.ImVec2, %struct.ImVec2, float, float, float, float, float, float, float, float, float, float, i32, %struct.ImVec2, %struct.ImVec2, %struct.ImVec2, %struct.ImVec2, float, i8, i8, i8, float, float, [53 x %struct.ImVec4] }
%struct.ImDrawListSharedData = type { %struct.ImVec2, ptr, float, float, float, %struct.ImVec4, i32, [48 x %struct.ImVec2], float, [64 x i8], ptr }
%struct.ImVector.3 = type { i32, i32, ptr }
%struct.ImVector.4 = type { i32, i32, ptr }
%struct.ImGuiStorage = type { %struct.ImVector.0 }
%struct.ImVector.0 = type { i32, i32, ptr }
%struct.ImGuiNextItemData = type <{ i32, float, i32, i32, i8, [3 x i8] }>
%struct.ImGuiLastItemData = type { i32, i32, i32, %struct.ImRect, %struct.ImRect }
%struct.ImGuiNextWindowData = type <{ i32, i32, i32, i32, %struct.ImVec2, %struct.ImVec2, %struct.ImVec2, %struct.ImVec2, %struct.ImVec2, i8, [3 x i8], %struct.ImRect, [4 x i8], ptr, ptr, float, %struct.ImVec2, [4 x i8] }>
%struct.ImVector.5 = type { i32, i32, ptr }
%struct.ImVector.6 = type { i32, i32, ptr }
%struct.ImVector.7 = type { i32, i32, ptr }
%struct.ImVector.9 = type { i32, i32, ptr }
%struct.ImVector.10 = type { i32, i32, ptr }
%struct.ImVector.11 = type { i32, i32, ptr }
%struct.ImVector.12 = type { i32, i32, ptr }
%struct.ImGuiNavItemData = type <{ ptr, i32, i32, %struct.ImRect, float, float, float, [4 x i8] }>
%struct.ImGuiPayload = type <{ ptr, i32, i32, i32, i32, [33 x i8], i8, i8, [5 x i8] }>
%struct.ImRect = type { %struct.ImVec2, %struct.ImVec2 }
%struct.ImVector.13 = type { i32, i32, ptr }
%struct.ImPool = type { %struct.ImVector.14, %struct.ImGuiStorage, i32, i32 }
%struct.ImVector.14 = type { i32, i32, ptr }
%struct.ImVector.15 = type { i32, i32, ptr }
%struct.ImVector.16 = type { i32, i32, ptr }
%struct.ImVector.17 = type { i32, i32, ptr }
%struct.ImPool.18 = type { %struct.ImVector.19, %struct.ImGuiStorage, i32, i32 }
%struct.ImVector.19 = type { i32, i32, ptr }
%struct.ImVector.20 = type { i32, i32, ptr }
%struct.ImVector.21 = type { i32, i32, ptr }
%struct.ImGuiInputTextState = type { i32, i32, i32, %struct.ImVector, %struct.ImVector.2, %struct.ImVector.2, i8, i32, float, %"struct.ImStb::STB_TexteditState", float, i8, i8, i8, i32, ptr, ptr }
%"struct.ImStb::STB_TexteditState" = type { i32, i32, i32, i8, i32, i8, i8, i8, i8, i8, i8, i8, float, %"struct.ImStb::StbUndoState" }
%"struct.ImStb::StbUndoState" = type { [99 x %"struct.ImStb::StbUndoRecord"], [999 x i16], i16, i16, i32, i32 }
%"struct.ImStb::StbUndoRecord" = type { i32, i32, i32, i32 }
%struct.ImFont = type <{ %struct.ImVector.16, float, float, %struct.ImVector, %struct.ImVector.22, ptr, ptr, ptr, i16, i16, i16, i16, i8, [3 x i8], float, float, float, i32, [2 x i8], [2 x i8] }>
%struct.ImVector.22 = type { i32, i32, ptr }
%struct.ImVec4 = type { float, float, float, float }
%struct.ImGuiComboPreviewData = type { %struct.ImRect, %struct.ImVec2, %struct.ImVec2, %struct.ImVec2, float, i32 }
%struct.ImVector.2 = type { i32, i32, ptr }
%struct.ImVector.8 = type { i32, i32, ptr }
%struct.ImVec2 = type { float, float }
%struct.ImVector.23 = type { i32, i32, ptr }
%struct.ImChunkStream = type { %struct.ImVector.2 }
%struct.ImChunkStream.24 = type { %struct.ImVector.2 }
%struct.ImVector.25 = type { i32, i32, ptr }
%struct.ImGuiTextBuffer = type { %struct.ImVector.2 }
%struct.ImGuiMetricsConfig = type { i8, i8, i8, i8, i8, i32, i32 }
%struct.ImGuiColorMod = type { i32, %struct.ImVec4 }

@GImGui = external dso_local global ptr, align 8

; 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 nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

; 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 @_ZN5ImGui13PopStyleColorEi(i32 noundef %0) #2 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %5 = load ptr, ptr @GImGui, align 8, !tbaa !9
  store ptr %5, ptr %3, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %9, %1
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %9, label %27

9:                                                ; preds = %6
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %10 = load ptr, ptr %3, align 8, !tbaa !9
  %11 = getelementptr inbounds %struct.ImGuiContext, ptr %10, i32 0, i32 75
  %12 = call noundef nonnull align 4 dereferenceable(20) ptr @_ZN8ImVectorI13ImGuiColorModE4backEv(ptr noundef nonnull align 8 dereferenceable(16) %11)
  store ptr %12, ptr %4, align 8, !tbaa !9
  %13 = load ptr, ptr %4, align 8, !tbaa !9
  %14 = getelementptr inbounds %struct.ImGuiColorMod, ptr %13, i32 0, i32 1
  %15 = load ptr, ptr %3, align 8, !tbaa !9
  %16 = getelementptr inbounds %struct.ImGuiContext, ptr %15, i32 0, i32 4
  %17 = getelementptr inbounds %struct.ImGuiStyle, ptr %16, i32 0, i32 40
  %18 = load ptr, ptr %4, align 8, !tbaa !9
  %19 = getelementptr inbounds %struct.ImGuiColorMod, ptr %18, i32 0, i32 0
  %20 = load i32, ptr %19, align 4, !tbaa !11
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [53 x %struct.ImVec4], ptr %17, i64 0, i64 %21
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %22, ptr align 4 %14, i64 16, i1 false), !tbaa.struct !15
  %23 = load ptr, ptr %3, align 8, !tbaa !9
  %24 = getelementptr inbounds %struct.ImGuiContext, ptr %23, i32 0, i32 75
  call void @_ZN8ImVectorI13ImGuiColorModE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(16) %24)
  %25 = load i32, ptr %2, align 4, !tbaa !5
  %26 = add nsw i32 %25, -1
  store i32 %26, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  br label %6, !llvm.loop !17

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(20) ptr @_ZN8ImVectorI13ImGuiColorModE4backEv(ptr noundef nonnull align 8 dereferenceable(16)) #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN8ImVectorI13ImGuiColorModE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(16)) #3 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree 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 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTS13ImGuiColorMod", !6, i64 0, !13, i64 4}
!13 = !{!"_ZTS6ImVec4", !14, i64 0, !14, i64 4, !14, i64 8, !14, i64 12}
!14 = !{!"float", !7, i64 0}
!15 = !{i64 0, i64 4, !16, i64 4, i64 4, !16, i64 8, i64 4, !16, i64 12, i64 4, !16}
!16 = !{!14, !14, i64 0}
!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"

%struct.ImVec4 = type { float, float, float, float }

@GImGui = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN5ImGui13PopStyleColorEi(i32 noundef %0) local_unnamed_addr #1 {
  %2 = icmp sgt i32 %0, 0
  br i1 %2, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1
  %3 = load ptr, ptr @GImGui, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %3, i64 7520
  %5 = getelementptr inbounds i8, ptr %3, i64 5664
  br label %6

6:                                                ; preds = %.lr.ph, %6
  %.06 = phi i32 [ %0, %.lr.ph ], [ %12, %6 ]
  %7 = tail call noundef nonnull align 4 dereferenceable(20) ptr @_ZN8ImVectorI13ImGuiColorModE4backEv(ptr noundef nonnull align 8 dereferenceable(16) %4)
  %8 = getelementptr inbounds i8, ptr %7, i64 4
  %9 = load i32, ptr %7, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [53 x %struct.ImVec4], ptr %5, i64 0, i64 %10
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %11, ptr noundef nonnull align 4 dereferenceable(16) %8, i64 16, i1 false), !tbaa.struct !14
  tail call void @_ZN8ImVectorI13ImGuiColorModE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(16) %4)
  %12 = add nsw i32 %.06, -1
  %13 = icmp ugt i32 %.06, 1
  br i1 %13, label %6, label %._crit_edge, !llvm.loop !16

._crit_edge:                                      ; preds = %6, %1
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(20) ptr @_ZN8ImVectorI13ImGuiColorModE4backEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN8ImVectorI13ImGuiColorModE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree 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 = { 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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTS13ImGuiColorMod", !11, i64 0, !12, i64 4}
!11 = !{!"int", !7, i64 0}
!12 = !{!"_ZTS6ImVec4", !13, i64 0, !13, i64 4, !13, i64 8, !13, i64 12}
!13 = !{!"float", !7, i64 0}
!14 = !{i64 0, i64 4, !15, i64 4, i64 4, !15, i64 8, i64 4, !15, i64 12, i64 4, !15}
!15 = !{!13, !13, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


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