; LLVM IR from PaddlePaddle/Serving :: core/predictor/tools/ocrtools/clipper.ll (ZN10ClipperLib18ReversePolyPtLinksEPNS_5OutPtE)

; 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.ClipperLib::OutPt" = type { i32, %"struct.ClipperLib::IntPoint", ptr, ptr }
%"struct.ClipperLib::IntPoint" = type { i64, i64 }

; 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 nounwind uwtable
define dso_local void @_ZN10ClipperLib18ReversePolyPtLinksEPNS_5OutPtE(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = icmp ne ptr %5, null
  br i1 %6, label %8, label %7

7:                                                ; preds = %1
  br label %28

8:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %9, ptr %3, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %23, %8
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %"struct.ClipperLib::OutPt", ptr %11, i32 0, i32 2
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  store ptr %13, ptr %4, align 8, !tbaa !5
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %"struct.ClipperLib::OutPt", ptr %14, i32 0, i32 3
  %16 = load ptr, ptr %15, align 8, !tbaa !14
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %"struct.ClipperLib::OutPt", ptr %17, i32 0, i32 2
  store ptr %16, ptr %18, align 8, !tbaa !9
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %"struct.ClipperLib::OutPt", ptr %20, i32 0, i32 3
  store ptr %19, ptr %21, align 8, !tbaa !14
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %22, ptr %3, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %10
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = icmp ne ptr %24, %25
  br i1 %26, label %10, label %27, !llvm.loop !15

27:                                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  br label %28

28:                                               ; preds = %27, %7
  ret void
}

attributes #0 = { nocallback nofree nosync 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 = { 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, !6, i64 24}
!10 = !{!"_ZTSN10ClipperLib5OutPtE", !11, i64 0, !12, i64 8, !6, i64 24, !6, i64 32}
!11 = !{!"int", !7, i64 0}
!12 = !{!"_ZTSN10ClipperLib8IntPointE", !13, i64 0, !13, i64 8}
!13 = !{!"long long", !7, i64 0}
!14 = !{!10, !6, i64 32}
!15 = distinct !{!15, !16}
!16 = !{!"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: mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN10ClipperLib18ReversePolyPtLinksEPNS_5OutPtE(ptr noundef %0) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %1, %.preheader
  %.0 = phi ptr [ %3, %.preheader ], [ %0, %1 ]
  %2 = getelementptr inbounds i8, ptr %.0, i64 24
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %.0, i64 32
  %5 = load ptr, ptr %4, align 8, !tbaa !13
  store ptr %5, ptr %2, align 8, !tbaa !5
  store ptr %3, ptr %4, align 8, !tbaa !13
  %.not11 = icmp eq ptr %3, %0
  br i1 %.not11, label %.loopexit, label %.preheader, !llvm.loop !14

.loopexit:                                        ; preds = %.preheader, %1
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) 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, !12, i64 24}
!6 = !{!"_ZTSN10ClipperLib5OutPtE", !7, i64 0, !10, i64 8, !12, i64 24, !12, i64 32}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"_ZTSN10ClipperLib8IntPointE", !11, i64 0, !11, i64 8}
!11 = !{!"long long", !8, i64 0}
!12 = !{!"any pointer", !8, i64 0}
!13 = !{!6, !12, i64 32}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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