; 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 void @_ZN17double_conversion6Bignum4ZeroEv(ptr noundef nonnull align 4 dereferenceable(516)) #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN17double_conversion6Bignum12AssignUInt64Em(ptr noundef nonnull align 4 dereferenceable(516) %0, i64 noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  %6 = load ptr, ptr %3, align 8
  call void @_ZN17double_conversion6Bignum4ZeroEv(ptr noundef nonnull align 4 dereferenceable(516) %6)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !11
  br label %7

7:                                                ; preds = %22, %2
  %8 = load i64, ptr %4, align 8, !tbaa !9
  %9 = icmp ugt i64 %8, 0
  br i1 %9, label %11, label %10

10:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %25

11:                                               ; preds = %7
  %12 = load i64, ptr %4, align 8, !tbaa !9
  %13 = and i64 %12, 268435455
  %14 = trunc i64 %13 to i32
  %15 = load i32, ptr %5, align 4, !tbaa !11
  %16 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZN17double_conversion6Bignum8RawBigitEi(ptr noundef nonnull align 4 dereferenceable(516) %6, i32 noundef %15)
  store i32 %14, ptr %16, align 4, !tbaa !11
  %17 = load i64, ptr %4, align 8, !tbaa !9
  %18 = lshr i64 %17, 28
  store i64 %18, ptr %4, align 8, !tbaa !9
  %19 = getelementptr inbounds %"class.double_conversion::Bignum", ptr %6, i32 0, i32 0
  %20 = load i16, ptr %19, align 4, !tbaa !13
  %21 = add i16 %20, 1
  store i16 %21, ptr %19, align 4, !tbaa !13
  br label %22

22:                                               ; preds = %11
  %23 = load i32, ptr %5, align 4, !tbaa !11
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %5, align 4, !tbaa !11
  br label %7, !llvm.loop !16

25:                                               ; preds = %10
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !15, i64 0}
!14 = !{!"_ZTSN17double_conversion6BignumE", !15, i64 0, !15, i64 2, !7, i64 4}
!15 = !{!"short", !7, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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 void @_ZN17double_conversion6Bignum4ZeroEv(ptr noundef nonnull align 4 dereferenceable(516)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN17double_conversion6Bignum12AssignUInt64Em(ptr noundef nonnull align 4 dereferenceable(516) %0, i64 noundef %1) local_unnamed_addr #0 align 2 {
  tail call void @_ZN17double_conversion6Bignum4ZeroEv(ptr noundef nonnull align 4 dereferenceable(516) %0)
  %.not6 = icmp eq i64 %1, 0
  br i1 %.not6, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %2
  ret void

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.08 = phi i32 [ %9, %.lr.ph ], [ 0, %2 ]
  %.057 = phi i64 [ %6, %.lr.ph ], [ %1, %2 ]
  %3 = trunc i64 %.057 to i32
  %4 = and i32 %3, 268435455
  %5 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZN17double_conversion6Bignum8RawBigitEi(ptr noundef nonnull align 4 dereferenceable(516) %0, i32 noundef %.08)
  store i32 %4, ptr %5, align 4, !tbaa !5
  %6 = lshr i64 %.057, 28
  %7 = load i16, ptr %0, align 4, !tbaa !9
  %8 = add i16 %7, 1
  store i16 %8, ptr %0, align 4, !tbaa !9
  %9 = add nuw nsw i32 %.08, 1
  %.not = icmp ult i64 %.057, 268435456
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !12
}

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


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