replica
/
hanchenye-llvm-project
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

move the sectionkind and section classes to TargetLoweringObjectFile.h 

llvm-svn: 77681
This commit is contained in:
Chris Lattner 2009-07-31 16:47:16 +00:00
parent b37f29b6f3
commit f0b4bf55f0
2 changed files with 191 additions and 189 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

189
llvm/include/llvm/Target/TargetAsmInfo.h
View File

@ -35,195 +35,6 @@ namespace llvm {
};
}
/// 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
};
private:
Kind K : 6;
/// Weak - This is true if the referenced symbol is weak (i.e. linkonce,
/// weak, weak_odr, etc). This is orthogonal from the categorization.
bool Weak : 1;
/// ExplicitSection - This is true if the global had a section explicitly
/// specified on it.
bool ExplicitSection : 1;
public:
// FIXME: REMOVE.
Kind getKind() const { return K; }
bool isWeak() const { return Weak; }
bool hasExplicitSection() const { return ExplicitSection; }
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, bool isWeak = false,
bool hasExplicitSection = false) {
SectionKind Res;
Res.K = K;
Res.Weak = isWeak;
Res.ExplicitSection = hasExplicitSection;
return Res;
}
};
class Section {
public:
std::string Name;
SectionKind Kind;
explicit Section() { }
const std::string &getName() const { return Name; }
SectionKind getKind() const { return Kind; }
};
/// TargetAsmInfo - This class is intended to be used as a base class for asm
/// properties and features specific to the target.
class TargetAsmInfo {

191
llvm/include/llvm/Target/TargetLoweringObjectFile.h
View File

@ -19,6 +19,197 @@
#include "llvm/Target/TargetAsmInfo.h"
namespace llvm {
/// 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
};
private:
Kind K : 6;
/// Weak - This is true if the referenced symbol is weak (i.e. linkonce,
/// weak, weak_odr, etc). This is orthogonal from the categorization.
bool Weak : 1;
/// ExplicitSection - This is true if the global had a section explicitly
/// specified on it.
bool ExplicitSection : 1;
public:
// FIXME: REMOVE.
Kind getKind() const { return K; }
bool isWeak() const { return Weak; }
bool hasExplicitSection() const { return ExplicitSection; }
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, bool isWeak = false,
bool hasExplicitSection = false) {
SectionKind Res;
Res.K = K;
Res.Weak = isWeak;
Res.ExplicitSection = hasExplicitSection;
return Res;
}
};
class Section {
public:
std::string Name;
SectionKind Kind;
explicit Section() { }
Section(const std::string &N, SectionKind K) : Name(N), Kind(K) {}
const std::string &getName() const { return Name; }
SectionKind getKind() const { return Kind; }
};
class TargetLoweringObjectFile {
private: