; LLVM IR from tangjz/acm-icpc :: hdu/6414.ll (Z8poly_gcd4PolyS_RS_)

; 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.Poly = type { i32, [2001 x i32] }

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9poly_normR4Poly(ptr noundef nonnull align 4 dereferenceable(8008)) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z8poly_div4PolyS_RS_S0_(ptr noundef byval(%struct.Poly) align 8, ptr noundef byval(%struct.Poly) align 8, ptr noundef nonnull align 4 dereferenceable(8008), ptr noundef nonnull align 4 dereferenceable(8008)) #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: mustprogress uwtable
define dso_local void @_Z8poly_gcd4PolyS_RS_(ptr noundef byval(%struct.Poly) align 8 %0, ptr noundef byval(%struct.Poly) align 8 %1, ptr noundef nonnull align 4 dereferenceable(8008) %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca %struct.Poly, align 8
  %6 = alloca %struct.Poly, align 8
  store ptr %2, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %7, ptr align 8 %1, i64 8008, i1 false), !tbaa.struct !9
  br label %8

8:                                                ; preds = %21, %3
  %9 = getelementptr inbounds %struct.Poly, ptr %0, i32 0, i32 0
  %10 = load i32, ptr %9, align 8, !tbaa !13
  %11 = icmp ne i32 %10, -1
  br i1 %11, label %12, label %23

12:                                               ; preds = %8
  %13 = getelementptr inbounds %struct.Poly, ptr %0, i32 0, i32 0
  %14 = load i32, ptr %13, align 8, !tbaa !13
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.Poly, ptr %15, i32 0, i32 0
  %17 = load i32, ptr %16, align 4, !tbaa !13
  %18 = icmp slt i32 %14, %17
  br i1 %18, label %19, label %21

19:                                               ; preds = %12
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZSt4swapI4PolyENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS4_ESt18is_move_assignableIS4_EEE5valueEvE4typeERS4_SD_(ptr noundef nonnull align 4 dereferenceable(8008) %0, ptr noundef nonnull align 4 dereferenceable(8008) %20) #3
  br label %21

21:                                               ; preds = %19, %12
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %5, ptr align 8 %0, i64 8008, i1 false), !tbaa.struct !9
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %6, ptr align 4 %22, i64 8008, i1 false), !tbaa.struct !9
  call void @_Z8poly_div4PolyS_RS_S0_(ptr noundef byval(%struct.Poly) align 8 %5, ptr noundef byval(%struct.Poly) align 8 %6, ptr noundef nonnull align 4 dereferenceable(8008) %1, ptr noundef nonnull align 4 dereferenceable(8008) %0)
  br label %8, !llvm.loop !15

23:                                               ; preds = %8
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_Z9poly_normR4Poly(ptr noundef nonnull align 4 dereferenceable(8008) %24)
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapI4PolyENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS4_ESt18is_move_assignableIS4_EEE5valueEvE4typeERS4_SD_(ptr noundef nonnull align 4 dereferenceable(8008), ptr noundef nonnull align 4 dereferenceable(8008)) #2

attributes #0 = { 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 #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{i64 0, i64 4, !10, i64 4, i64 8004, !12}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !7, i64 0}
!12 = !{!7, !7, i64 0}
!13 = !{!14, !11, i64 0}
!14 = !{!"_ZTS4Poly", !11, i64 0, !7, i64 4}
!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"

%struct.Poly = type { i32, [2001 x i32] }

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9poly_normR4Poly(ptr noundef nonnull align 4 dereferenceable(8008)) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z8poly_div4PolyS_RS_S0_(ptr noundef byval(%struct.Poly) align 8, ptr noundef byval(%struct.Poly) align 8, ptr noundef nonnull align 4 dereferenceable(8008), ptr noundef nonnull align 4 dereferenceable(8008)) local_unnamed_addr #0

; 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) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8poly_gcd4PolyS_RS_(ptr noundef byval(%struct.Poly) align 8 %0, ptr noundef byval(%struct.Poly) align 8 %1, ptr noundef nonnull align 4 dereferenceable(8008) %2) local_unnamed_addr #0 {
  %4 = alloca %struct.Poly, align 8
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(8008) %2, ptr noundef nonnull align 8 dereferenceable(8008) %1, i64 8008, i1 false), !tbaa.struct !5
  %5 = load i32, ptr %0, align 8, !tbaa !11
  %.not5 = icmp eq i32 %5, -1
  br i1 %.not5, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %10
  %6 = phi i32 [ %11, %10 ], [ %5, %3 ]
  %7 = load i32, ptr %2, align 4, !tbaa !11
  %8 = icmp slt i32 %6, %7
  br i1 %8, label %9, label %10

9:                                                ; preds = %.lr.ph
  call void @_ZSt4swapI4PolyENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS4_ESt18is_move_assignableIS4_EEE5valueEvE4typeERS4_SD_(ptr noundef nonnull align 4 dereferenceable(8008) %0, ptr noundef nonnull align 4 dereferenceable(8008) %2) #3
  br label %10

10:                                               ; preds = %9, %.lr.ph
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(8008) %4, ptr noundef nonnull align 4 dereferenceable(8008) %2, i64 8008, i1 false), !tbaa.struct !5
  call void @_Z8poly_div4PolyS_RS_S0_(ptr noundef nonnull byval(%struct.Poly) align 8 %0, ptr noundef nonnull byval(%struct.Poly) align 8 %4, ptr noundef nonnull align 4 dereferenceable(8008) %1, ptr noundef nonnull align 4 dereferenceable(8008) %0)
  %11 = load i32, ptr %0, align 8, !tbaa !11
  %.not = icmp eq i32 %11, -1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %10, %3
  call void @_Z9poly_normR4Poly(ptr noundef nonnull align 4 dereferenceable(8008) %2)
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapI4PolyENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS4_ESt18is_move_assignableIS4_EEE5valueEvE4typeERS4_SD_(ptr noundef nonnull align 4 dereferenceable(8008), ptr noundef nonnull align 4 dereferenceable(8008)) local_unnamed_addr #2

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{i64 0, i64 4, !6, i64 4, i64 8004, !10}
!6 = !{!7, !7, i64 0}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!8, !8, i64 0}
!11 = !{!12, !7, i64 0}
!12 = !{!"_ZTS4Poly", !7, i64 0, !8, i64 4}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,MemCpyOptPass,SROAPass,SimplifyCFGPass