dart::Boxing Struct Reference

#include <il.h>

Inheritance diagram for dart::Boxing:

Static Public Member Functions
static bool	Supports (Representation rep)
static constexpr Representation	NativeRepresentation (Representation rep)
static bool	RequiresAllocation (Representation rep)
static intptr_t	ValueOffset (Representation rep)
static intptr_t	BoxCid (Representation rep)

Detailed Description

Definition at line 8445 of file il.h.

Member Function Documentation

BoxCid()

intptr_t dart::Boxing::BoxCid ( Representation  rep )

static

Definition at line 491 of file il.cc.

                                          {
  if (RepresentationUtils::IsUnboxedInteger(rep)) {
    if (!Boxing::RequiresAllocation(rep)) {
      return kSmiCid;
    } else if (RepresentationUtils::ValueSize(rep) <= sizeof(int64_t)) {
      return kMintCid;
    }
  }
  switch (rep) {
    FOR_EACH_NON_INT_BOXED_REPRESENTATION(BOXING_CID_CASE)
    default:
      UNREACHABLE();
      return kIllegalCid;
  }
}

NativeRepresentation()

static constexpr Representation dart::Boxing::NativeRepresentation ( Representation  rep )

inlinestaticconstexpr

Definition at line 8456 of file il.h.

                                                                           {
    // Only change integer representations.
    if (!RepresentationUtils::IsUnboxedInteger(rep)) return rep;
    // Use signed word-sized integers for representations smaller than 4 bytes.
    return RepresentationUtils::ValueSize(rep) < 4 ? kUnboxedIntPtr : rep;
  }

RequiresAllocation()

bool dart::Boxing::RequiresAllocation ( Representation  rep )

static

Definition at line 468 of file il.cc.

                                                  {
  if (RepresentationUtils::IsUnboxedInteger(rep)) {
    return (kBitsPerByte * RepresentationUtils::ValueSize(rep)) >
           compiler::target::kSmiBits;
  }
  return true;
}

Supports()

bool dart::Boxing::Supports ( Representation  rep )

static

Definition at line 457 of file il.cc.

                                        {
  if (RepresentationUtils::IsUnboxedInteger(rep)) {
    return true;
  }
  switch (rep) {
    FOR_EACH_NON_INT_BOXED_REPRESENTATION(BOXING_IN_SET_CASE)
    default:
      return false;
  }
}

ValueOffset()

intptr_t dart::Boxing::ValueOffset ( Representation  rep )

static

Definition at line 476 of file il.cc.

                                               {
  if (RepresentationUtils::IsUnboxedInteger(rep) &&
      Boxing::RequiresAllocation(rep) &&
      RepresentationUtils::ValueSize(rep) <= sizeof(int64_t)) {
    return compiler::target::Mint::value_offset();
  }
  switch (rep) {
    FOR_EACH_NON_INT_BOXED_REPRESENTATION(BOXING_VALUE_OFFSET_CASE)
    default:
      UNREACHABLE();
      return 0;
  }
}

---

The documentation for this struct was generated from the following files:

• third_party/dart-lang/sdk/runtime/vm/compiler/backend/il.h
• third_party/dart-lang/sdk/runtime/vm/compiler/backend/il.cc