; LLVM IR from InsightSoftwareConsortium/ITK :: Modules/ThirdParty/DoubleConversion/src/double-conversion (bignum)

; 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.double_conversion::Bignum" = type { i16, i16, [128 x i32] }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZN17double_conversion6Bignum8RawBigitEi(ptr noundef nonnull align 4 dereferenceable(516), i32 noundef) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNK17double_conversion6Bignum8RawBigitEi(ptr noundef nonnull align 4 dereferenceable(516), i32 noundef) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN17double_conversion6Bignum12AssignBignumERKS0_(ptr noundef nonnull align 4 dereferenceable(516) %0, ptr noundef nonnull align 4 dereferenceable(516) %1) #0 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = getelementptr inbounds %"class.double_conversion::Bignum", ptr %7, i32 0, i32 1
  %9 = load i16, ptr %8, align 2, !tbaa !9
  %10 = getelementptr inbounds %"class.double_conversion::Bignum", ptr %6, i32 0, i32 1
  store i16 %9, ptr %10, align 2, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !12
  br label %11

11:                                               ; preds = %26, %2
  %12 = load i32, ptr %5, align 4, !tbaa !12
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = getelementptr inbounds %"class.double_conversion::Bignum", ptr %13, i32 0, i32 0
  %15 = load i16, ptr %14, align 4, !tbaa !14
  %16 = sext i16 %15 to i32
  %17 = icmp slt i32 %12, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %29

19:                                               ; preds = %11
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = load i32, ptr %5, align 4, !tbaa !12
  %22 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK17double_conversion6Bignum8RawBigitEi(ptr noundef nonnull align 4 dereferenceable(516) %20, i32 noundef %21)
  %23 = load i32, ptr %22, align 4, !tbaa !12
  %24 = load i32, ptr %5, align 4, !tbaa !12
  %25 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZN17double_conversion6Bignum8RawBigitEi(ptr noundef nonnull align 4 dereferenceable(516) %6, i32 noundef %24)
  store i32 %23, ptr %25, align 4, !tbaa !12
  br label %26

26:                                               ; preds = %19
  %27 = load i32, ptr %5, align 4, !tbaa !12
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %5, align 4, !tbaa !12
  br label %11, !llvm.loop !15

29:                                               ; preds = %18
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = getelementptr inbounds %"class.double_conversion::Bignum", ptr %30, i32 0, i32 0
  %32 = load i16, ptr %31, align 4, !tbaa !14
  %33 = getelementptr inbounds %"class.double_conversion::Bignum", ptr %6, i32 0, i32 0
  store i16 %32, ptr %33, align 4, !tbaa !14
  ret void
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !11, i64 2}
!10 = !{!"_ZTSN17double_conversion6BignumE", !11, i64 0, !11, i64 2, !7, i64 4}
!11 = !{!"short", !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = !{!10, !11, i64 0}
!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 nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZN17double_conversion6Bignum8RawBigitEi(ptr noundef nonnull align 4 dereferenceable(516), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNK17double_conversion6Bignum8RawBigitEi(ptr noundef nonnull align 4 dereferenceable(516), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN17double_conversion6Bignum12AssignBignumERKS0_(ptr noundef nonnull align 4 dereferenceable(516) %0, ptr noundef nonnull align 4 dereferenceable(516) %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %1, i64 2
  %4 = load i16, ptr %3, align 2, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 2
  store i16 %4, ptr %5, align 2, !tbaa !5
  %6 = load i16, ptr %1, align 4, !tbaa !10
  %7 = icmp sgt i16 %6, 0
  br i1 %7, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.lcssa = phi i16 [ %6, %2 ], [ %12, %.lr.ph ]
  store i16 %.lcssa, ptr %0, align 4, !tbaa !10
  ret void

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.08 = phi i32 [ %11, %.lr.ph ], [ 0, %2 ]
  %8 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNK17double_conversion6Bignum8RawBigitEi(ptr noundef nonnull align 4 dereferenceable(516) %1, i32 noundef %.08)
  %9 = load i32, ptr %8, align 4, !tbaa !11
  %10 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZN17double_conversion6Bignum8RawBigitEi(ptr noundef nonnull align 4 dereferenceable(516) %0, i32 noundef %.08)
  store i32 %9, ptr %10, align 4, !tbaa !11
  %11 = add nuw nsw i32 %.08, 1
  %12 = load i16, ptr %1, align 4, !tbaa !10
  %13 = sext i16 %12 to i32
  %14 = icmp slt i32 %11, %13
  br i1 %14, label %.lr.ph, label %._crit_edge, !llvm.loop !13
}

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" }

!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, !7, i64 2}
!6 = !{!"_ZTSN17double_conversion6BignumE", !7, i64 0, !7, i64 2, !8, i64 4}
!7 = !{!"short", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !8, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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