clang
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include
clang
AST
APNumericStorage.h
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//===--- APNumericStorage.h - Store APInt/APFloat in ASTContext -*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_AST_APNUMERICSTORAGE_H
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#define LLVM_CLANG_AST_APNUMERICSTORAGE_H
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#include "llvm/ADT/APFloat.h"
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#include "llvm/ADT/APInt.h"
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namespace
clang
{
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class
ASTContext;
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/// Used by IntegerLiteral/FloatingLiteral/EnumConstantDecl to store the
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/// numeric without leaking memory.
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///
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/// For large floats/integers, APFloat/APInt will allocate memory from the heap
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/// to represent these numbers. Unfortunately, when we use a BumpPtrAllocator
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/// to allocate IntegerLiteral/FloatingLiteral nodes the memory associated with
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/// the APFloat/APInt values will never get freed. APNumericStorage uses
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/// ASTContext's allocator for memory allocation.
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class
APNumericStorage
{
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union
{
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uint64_t
VAL
;
///< Used to store the <= 64 bits integer value.
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uint64_t *
pVal
;
///< Used to store the >64 bits integer value.
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};
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unsigned
BitWidth;
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bool
hasAllocation()
const
{
return
llvm::APInt::getNumWords(BitWidth) > 1; }
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APNumericStorage
(
const
APNumericStorage
&) =
delete
;
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void
operator=(
const
APNumericStorage
&) =
delete
;
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protected
:
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APNumericStorage
() :
VAL
(0), BitWidth(0) {}
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llvm::APInt
getIntValue
()
const
{
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unsigned
NumWords = llvm::APInt::getNumWords(BitWidth);
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if
(NumWords > 1)
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return
llvm::APInt(BitWidth, NumWords,
pVal
);
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else
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return
llvm::APInt(BitWidth,
VAL
);
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}
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void
setIntValue
(
const
ASTContext
&
C
,
const
llvm::APInt &Val);
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};
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class
APIntStorage
:
private
APNumericStorage
{
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public
:
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llvm::APInt
getValue
()
const
{
return
getIntValue
(); }
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void
setValue
(
const
ASTContext
&
C
,
const
llvm::APInt &Val) {
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setIntValue
(
C
, Val);
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}
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};
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class
APFloatStorage
:
private
APNumericStorage
{
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public
:
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llvm::APFloat
getValue
(
const
llvm::fltSemantics &Semantics)
const
{
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return
llvm::APFloat(Semantics,
getIntValue
());
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}
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void
setValue
(
const
ASTContext
&
C
,
const
llvm::APFloat &Val) {
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setIntValue
(
C
, Val.bitcastToAPInt());
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}
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};
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}
// end namespace clang
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#endif
// LLVM_CLANG_AST_APNUMERICSTORAGE_H
clang::APFloatStorage
Definition:
APNumericStorage.h:59
clang::APFloatStorage::getValue
llvm::APFloat getValue(const llvm::fltSemantics &Semantics) const
Definition:
APNumericStorage.h:61
clang::APFloatStorage::setValue
void setValue(const ASTContext &C, const llvm::APFloat &Val)
Definition:
APNumericStorage.h:64
clang::APIntStorage
Definition:
APNumericStorage.h:51
clang::APIntStorage::setValue
void setValue(const ASTContext &C, const llvm::APInt &Val)
Definition:
APNumericStorage.h:54
clang::APIntStorage::getValue
llvm::APInt getValue() const
Definition:
APNumericStorage.h:53
clang::APNumericStorage
Used by IntegerLiteral/FloatingLiteral/EnumConstantDecl to store the numeric without leaking memory.
Definition:
APNumericStorage.h:26
clang::APNumericStorage::pVal
uint64_t * pVal
Used to store the >64 bits integer value.
Definition:
APNumericStorage.h:29
clang::APNumericStorage::VAL
uint64_t VAL
Used to store the <= 64 bits integer value.
Definition:
APNumericStorage.h:28
clang::APNumericStorage::getIntValue
llvm::APInt getIntValue() const
Definition:
APNumericStorage.h:41
clang::APNumericStorage::APNumericStorage
APNumericStorage()
Definition:
APNumericStorage.h:39
clang::APNumericStorage::setIntValue
void setIntValue(const ASTContext &C, const llvm::APInt &Val)
Definition:
Expr.cpp:949
clang::ASTContext
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition:
ASTContext.h:187
clang
The JSON file list parser is used to communicate input to InstallAPI.
Definition:
CalledOnceCheck.h:17
clang::LinkageSpecLanguageIDs::C
@ C
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