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fix a layering violation by moving SectionKind out to its own header.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77808 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-08-01 21:30:49 +00:00
parent f17008844a
commit 0064e85050
3 changed files with 186 additions and 164 deletions
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4
include/llvm/MC/MCSection.h
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@ -16,9 +16,7 @@
#include <string>
#include "llvm/ADT/StringRef.h"
// FIXME: HORRIBLE HACK: major layering violation to get an enum.
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/MC/SectionKind.h"
namespace llvm {
class MCContext;

184
include/llvm/MC/SectionKind.h Normal file
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@ -0,0 +1,184 @@
//===-- llvm/Target/TargetLoweringObjectFile.h - Object Info ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements classes used to handle lowerings specific to common
// object file formats.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_SECTIONKIND_H
#define LLVM_MC_SECTIONKIND_H
namespace llvm {
/// SectionKind - This is a simple POD value that classifies the properties of
/// a section. A section is classified into the deepest possible
/// classification, and then the target maps them onto their sections based on
/// what capabilities they have.
///
/// The comments below describe these as if they were an inheritance hierarchy
/// in order to explain the predicates below.
///
class SectionKind {
public:
enum Kind {
/// Metadata - Debug info sections or other metadata.
Metadata,
/// Text - Text section, used for functions and other executable code.
Text,
/// ReadOnly - Data that is never written to at program runtime by the
/// program or the dynamic linker. Things in the top-level readonly
/// SectionKind are not mergeable.
ReadOnly,
/// MergeableCString - This is a special section for nul-terminated
/// strings. The linker can unique the C strings, knowing their
/// semantics. Because it uniques based on the nul terminators, the
/// compiler can't put strings in this section that have embeded nuls
/// in them.
MergeableCString,
/// MergeableConst - These are sections for merging fixed-length
/// constants together. For example, this can be used to unique
/// constant pool entries etc.
MergeableConst,
/// MergeableConst4 - This is a section used by 4-byte constants,
/// for example, floats.
MergeableConst4,
/// MergeableConst8 - This is a section used by 8-byte constants,
/// for example, doubles.
MergeableConst8,
/// MergeableConst16 - This is a section used by 16-byte constants,
/// for example, vectors.
MergeableConst16,
/// Writeable - This is the base of all segments that need to be written
/// to during program runtime.
/// ThreadLocal - This is the base of all TLS segments. All TLS
/// objects must be writeable, otherwise there is no reason for them to
/// be thread local!
/// ThreadBSS - Zero-initialized TLS data objects.
ThreadBSS,
/// ThreadData - Initialized TLS data objects.
ThreadData,
/// GlobalWriteableData - Writeable data that is global (not thread
/// local).
/// BSS - Zero initialized writeable data.
BSS,
/// DataRel - This is the most general form of data that is written
/// to by the program, it can have random relocations to arbitrary
/// globals.
DataRel,
/// DataRelLocal - This is writeable data that has a non-zero
/// initializer and has relocations in it, but all of the
/// relocations are known to be within the final linked image
/// the global is linked into.
DataRelLocal,
/// DataNoRel - This is writeable data that has a non-zero
/// initializer, but whose initializer is known to have no
/// relocations.
DataNoRel,
/// ReadOnlyWithRel - These are global variables that are never
/// written to by the program, but that have relocations, so they
/// must be stuck in a writeable section so that the dynamic linker
/// can write to them. If it chooses to, the dynamic linker can
/// mark the pages these globals end up on as read-only after it is
/// done with its relocation phase.
ReadOnlyWithRel,
/// ReadOnlyWithRelLocal - This is data that is readonly by the
/// program, but must be writeable so that the dynamic linker
/// can perform relocations in it. This is used when we know
/// that all the relocations are to globals in this final
/// linked image.
ReadOnlyWithRelLocal
};
protected:
Kind K : 8;
public:
bool isMetadata() const { return K == Metadata; }
bool isText() const { return K == Text; }
bool isReadOnly() const {
return K == ReadOnly || K == MergeableCString || isMergeableConst();
}
bool isMergeableCString() const { return K == MergeableCString; }
bool isMergeableConst() const {
return K == MergeableConst || K == MergeableConst4 ||
K == MergeableConst8 || K == MergeableConst16;
}
bool isMergeableConst4() const { return K == MergeableConst4; }
bool isMergeableConst8() const { return K == MergeableConst8; }
bool isMergeableConst16() const { return K == MergeableConst16; }
bool isWriteable() const {
return isThreadLocal() || isGlobalWriteableData();
}
bool isThreadLocal() const {
return K == ThreadData || K == ThreadBSS;
}
bool isThreadBSS() const { return K == ThreadBSS; }
bool isThreadData() const { return K == ThreadData; }
bool isGlobalWriteableData() const {
return isBSS() || isDataRel() || isReadOnlyWithRel();
}
bool isBSS() const { return K == BSS; }
bool isDataRel() const {
return K == DataRel || K == DataRelLocal || K == DataNoRel;
}
bool isDataRelLocal() const {
return K == DataRelLocal || K == DataNoRel;
}
bool isDataNoRel() const { return K == DataNoRel; }
bool isReadOnlyWithRel() const {
return K == ReadOnlyWithRel || K == ReadOnlyWithRelLocal;
}
bool isReadOnlyWithRelLocal() const {
return K == ReadOnlyWithRelLocal;
}
static SectionKind get(Kind K) {
SectionKind Res;
Res.K = K;
return Res;
}
};
} // end namespace llvm
#endif

162
include/llvm/Target/TargetLoweringObjectFile.h
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@ -17,6 +17,7 @@
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/MC/SectionKind.h"
namespace llvm {
class MCSection;
@ -25,167 +26,6 @@ namespace llvm {
class Mangler;
class TargetMachine;
/// SectionKind - This is a simple POD value that classifies the properties of
/// a section. A global variable is classified into the deepest possible
/// classification, and then the target maps them onto their sections based on
/// what capabilities they have.
///
/// The comments below describe these as if they were an inheritance hierarchy
/// in order to explain the predicates below.
class SectionKind {
public:
enum Kind {
/// Metadata - Debug info sections or other metadata.
Metadata,
/// Text - Text section, used for functions and other executable code.
Text,
/// ReadOnly - Data that is never written to at program runtime by the
/// program or the dynamic linker. Things in the top-level readonly
/// SectionKind are not mergeable.
ReadOnly,
/// MergeableCString - This is a special section for nul-terminated
/// strings. The linker can unique the C strings, knowing their
/// semantics. Because it uniques based on the nul terminators, the
/// compiler can't put strings in this section that have embeded nuls
/// in them.
MergeableCString,
/// MergeableConst - These are sections for merging fixed-length
/// constants together. For example, this can be used to unique
/// constant pool entries etc.
MergeableConst,
/// MergeableConst4 - This is a section used by 4-byte constants,
/// for example, floats.
MergeableConst4,
/// MergeableConst8 - This is a section used by 8-byte constants,
/// for example, doubles.
MergeableConst8,
/// MergeableConst16 - This is a section used by 16-byte constants,
/// for example, vectors.
MergeableConst16,
/// Writeable - This is the base of all segments that need to be written
/// to during program runtime.
/// ThreadLocal - This is the base of all TLS segments. All TLS
/// objects must be writeable, otherwise there is no reason for them to
/// be thread local!
/// ThreadBSS - Zero-initialized TLS data objects.
ThreadBSS,
/// ThreadData - Initialized TLS data objects.
ThreadData,
/// GlobalWriteableData - Writeable data that is global (not thread
/// local).
/// BSS - Zero initialized writeable data.
BSS,
/// DataRel - This is the most general form of data that is written
/// to by the program, it can have random relocations to arbitrary
/// globals.
DataRel,
/// DataRelLocal - This is writeable data that has a non-zero
/// initializer and has relocations in it, but all of the
/// relocations are known to be within the final linked image
/// the global is linked into.
DataRelLocal,
/// DataNoRel - This is writeable data that has a non-zero
/// initializer, but whose initializer is known to have no
/// relocations.
DataNoRel,
/// ReadOnlyWithRel - These are global variables that are never
/// written to by the program, but that have relocations, so they
/// must be stuck in a writeable section so that the dynamic linker
/// can write to them. If it chooses to, the dynamic linker can
/// mark the pages these globals end up on as read-only after it is
/// done with its relocation phase.
ReadOnlyWithRel,
/// ReadOnlyWithRelLocal - This is data that is readonly by the
/// program, but must be writeable so that the dynamic linker
/// can perform relocations in it. This is used when we know
/// that all the relocations are to globals in this final
/// linked image.
ReadOnlyWithRelLocal
};
protected:
Kind K : 6;
public:
bool isMetadata() const { return K == Metadata; }
bool isText() const { return K == Text; }
bool isReadOnly() const {
return K == ReadOnly || K == MergeableCString || isMergeableConst();
}
bool isMergeableCString() const { return K == MergeableCString; }
bool isMergeableConst() const {
return K == MergeableConst || K == MergeableConst4 ||
K == MergeableConst8 || K == MergeableConst16;
}
bool isMergeableConst4() const { return K == MergeableConst4; }
bool isMergeableConst8() const { return K == MergeableConst8; }
bool isMergeableConst16() const { return K == MergeableConst16; }
bool isWriteable() const {
return isThreadLocal() || isGlobalWriteableData();
}
bool isThreadLocal() const {
return K == ThreadData || K == ThreadBSS;
}
bool isThreadBSS() const { return K == ThreadBSS; }
bool isThreadData() const { return K == ThreadData; }
bool isGlobalWriteableData() const {
return isBSS() || isDataRel() || isReadOnlyWithRel();
}
bool isBSS() const { return K == BSS; }
bool isDataRel() const {
return K == DataRel || K == DataRelLocal || K == DataNoRel;
}
bool isDataRelLocal() const {
return K == DataRelLocal || K == DataNoRel;
}
bool isDataNoRel() const { return K == DataNoRel; }
bool isReadOnlyWithRel() const {
return K == ReadOnlyWithRel || K == ReadOnlyWithRelLocal;
}
bool isReadOnlyWithRelLocal() const {
return K == ReadOnlyWithRelLocal;
}
static SectionKind get(Kind K) {
SectionKind Res;
Res.K = K;
return Res;
}
};
/// SectionInfo - This class is a target-independent classification of a global
/// which is used to simplify target-specific code by exposing common