; LLVM IR from niessner/Matterport :: code/gaps/pkgs/R2Shapes/R2Polygon.ll (ZNK9R2Polygon8CentroidEv)

; 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.R2Point = type { [2 x double] }
%class.R2Polygon = type <{ %class.R2Solid, ptr, i32, [4 x i8], %class.R2Box, i32, [4 x i8] }>
%class.R2Solid = type { %class.R2Shape }
%class.R2Shape = type { ptr }
%class.R2Box = type { %class.R2Solid, %class.R2Point, %class.R2Point }

@R2null_point = external global %class.R2Point, 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 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 @_ZNK9R2Polygon8CentroidEv(ptr dead_on_unwind noalias writable sret(%class.R2Point) align 8 %0, ptr noundef nonnull align 8 dereferenceable(68) %1) unnamed_addr #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca %class.R2Point, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %4, align 8
  %8 = getelementptr inbounds %class.R2Polygon, ptr %7, i32 0, i32 2
  %9 = load i32, ptr %8, align 8, !tbaa !9
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %11, label %12

11:                                               ; preds = %2
  call void @_ZN7R2PointC1ERKS_(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef nonnull align 8 dereferenceable(16) @R2null_point)
  br label %33

12:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 16, ptr %5) #3
  call void @_ZN7R2PointC1ERKS_(ptr noundef nonnull align 8 dereferenceable(16) %5, ptr noundef nonnull align 8 dereferenceable(16) @R2null_point)
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !16
  br label %13

13:                                               ; preds = %26, %12
  %14 = load i32, ptr %6, align 4, !tbaa !16
  %15 = getelementptr inbounds %class.R2Polygon, ptr %7, i32 0, i32 2
  %16 = load i32, ptr %15, align 8, !tbaa !9
  %17 = icmp slt i32 %14, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %29

19:                                               ; preds = %13
  %20 = getelementptr inbounds %class.R2Polygon, ptr %7, i32 0, i32 1
  %21 = load ptr, ptr %20, align 8, !tbaa !17
  %22 = load i32, ptr %6, align 4, !tbaa !16
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds %class.R2Point, ptr %21, i64 %23
  %25 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZN7R2PointpLERKS_(ptr noundef nonnull align 8 dereferenceable(16) %5, ptr noundef nonnull align 8 dereferenceable(16) %24)
  br label %26

26:                                               ; preds = %19
  %27 = load i32, ptr %6, align 4, !tbaa !16
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %6, align 4, !tbaa !16
  br label %13, !llvm.loop !18

29:                                               ; preds = %18
  %30 = getelementptr inbounds %class.R2Polygon, ptr %7, i32 0, i32 2
  %31 = load i32, ptr %30, align 8, !tbaa !9
  %32 = sitofp i32 %31 to double
  call void @_ZdvRK7R2Pointd(ptr dead_on_unwind writable sret(%class.R2Point) align 8 %0, ptr noundef nonnull align 8 dereferenceable(16) %5, double noundef %32)
  call void @llvm.lifetime.end.p0(i64 16, ptr %5) #3
  br label %33

33:                                               ; preds = %29, %11
  ret void
}

declare void @_ZN7R2PointC1ERKS_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #2

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZN7R2PointpLERKS_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) #2

declare void @_ZdvRK7R2Pointd(ptr dead_on_unwind writable sret(%class.R2Point) align 8, ptr noundef nonnull align 8 dereferenceable(16), double noundef) #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 = { "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, !13, i64 16}
!10 = !{!"_ZTS9R2Polygon", !11, i64 0, !6, i64 8, !13, i64 16, !14, i64 24, !13, i64 64}
!11 = !{!"_ZTS7R2Solid", !12, i64 0}
!12 = !{!"_ZTS7R2Shape"}
!13 = !{!"int", !7, i64 0}
!14 = !{!"_ZTS5R2Box", !11, i64 0, !15, i64 8, !15, i64 24}
!15 = !{!"_ZTS7R2Point", !7, i64 0}
!16 = !{!13, !13, i64 0}
!17 = !{!10, !6, i64 8}
!18 = distinct !{!18, !19}
!19 = !{!"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"

%class.R2Point = type { [2 x double] }

@R2null_point = external global %class.R2Point, align 8

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress 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 @_ZNK9R2Polygon8CentroidEv(ptr dead_on_unwind noalias writable sret(%class.R2Point) align 8 %0, ptr nocapture noundef nonnull readonly align 8 dereferenceable(68) %1) unnamed_addr #1 align 2 {
  %3 = alloca %class.R2Point, align 8
  %4 = getelementptr inbounds i8, ptr %1, i64 16
  %5 = load i32, ptr %4, align 8, !tbaa !5
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %7, label %8

7:                                                ; preds = %2
  tail call void @_ZN7R2PointC1ERKS_(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef nonnull align 8 dereferenceable(16) @R2null_point)
  br label %20

8:                                                ; preds = %2
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #3
  call void @_ZN7R2PointC1ERKS_(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr noundef nonnull align 8 dereferenceable(16) @R2null_point)
  %9 = load i32, ptr %4, align 8, !tbaa !5
  %10 = icmp sgt i32 %9, 0
  br i1 %10, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %8
  %11 = getelementptr inbounds i8, ptr %1, i64 8
  br label %13

._crit_edge:                                      ; preds = %13, %8
  %.lcssa = phi i32 [ %9, %8 ], [ %17, %13 ]
  %12 = sitofp i32 %.lcssa to double
  call void @_ZdvRK7R2Pointd(ptr dead_on_unwind writable sret(%class.R2Point) align 8 %0, ptr noundef nonnull align 8 dereferenceable(16) %3, double noundef %12)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #3
  br label %20

13:                                               ; preds = %.lr.ph, %13
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %13 ]
  %14 = load ptr, ptr %11, align 8, !tbaa !15
  %15 = getelementptr inbounds %class.R2Point, ptr %14, i64 %indvars.iv
  %16 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZN7R2PointpLERKS_(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr noundef nonnull align 8 dereferenceable(16) %15)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %17 = load i32, ptr %4, align 8, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = icmp slt i64 %indvars.iv.next, %18
  br i1 %19, label %13, label %._crit_edge, !llvm.loop !16

20:                                               ; preds = %._crit_edge, %7
  ret void
}

declare void @_ZN7R2PointC1ERKS_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #2

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZN7R2PointpLERKS_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #2

declare void @_ZdvRK7R2Pointd(ptr dead_on_unwind writable sret(%class.R2Point) align 8, ptr noundef nonnull align 8 dereferenceable(16), double noundef) local_unnamed_addr #2

attributes #0 = { mustprogress 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 = { "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, !12, i64 16}
!6 = !{!"_ZTS9R2Polygon", !7, i64 0, !9, i64 8, !12, i64 16, !13, i64 24, !12, i64 64}
!7 = !{!"_ZTS7R2Solid", !8, i64 0}
!8 = !{!"_ZTS7R2Shape"}
!9 = !{!"any pointer", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C++ TBAA"}
!12 = !{!"int", !10, i64 0}
!13 = !{!"_ZTS5R2Box", !7, i64 0, !14, i64 8, !14, i64 24}
!14 = !{!"_ZTS7R2Point", !10, i64 0}
!15 = !{!6, !9, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


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