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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84196 91177308-0d34-0410-b5e6-96231b3b80d8
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Benjamin Kramer 2009-10-15 19:46:34 +00:00
parent 753ec15d5f
commit 5814fefc7f
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305
lib/Target/PIC16/PIC16ABINames.h Normal file
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//===-- PIC16ABINames.h - PIC16 Naming conventios for ABI----- --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the functions to manage ABI Naming conventions for PIC16.
//
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_PIC16ABINAMES_H
#define LLVM_TARGET_PIC16ABINAMES_H
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Target/TargetMachine.h"
#include <cassert>
#include <sstream>
#include <cstring>
#include <string>
namespace llvm {
class PIC16TargetMachine;
class FunctionPass;
class MachineCodeEmitter;
class formatted_raw_ostream;
// A Central class to manage all ABI naming conventions.
// PAN - [P]ic16 [A]BI [N]ames
class PAN {
public:
// Map the name of the symbol to its section name.
// Current ABI:
// -----------------------------------------------------
// ALL Names are prefixed with the symobl '@'.
// ------------------------------------------------------
// Global variables do not have any '.' in their names.
// These are maily function names and global variable names.
// Example - @foo, @i
// -------------------------------------------------------
// Functions and auto variables.
// Names are mangled as <prefix><funcname>.<tag>.<varname>
// Where <prefix> is '@' and <tag> is any one of
// the following
// .auto. - an automatic var of a function.
// .temp. - temproray data of a function.
// .ret. - return value label for a function.
// .frame. - Frame label for a function where retval, args
// and temps are stored.
// .args. - Label used to pass arguments to a direct call.
// Example - Function name: @foo
// Its frame: @foo.frame.
// Its retval: @foo.ret.
// Its local vars: @foo.auto.a
// Its temp data: @foo.temp.
// Its arg passing: @foo.args.
//----------------------------------------------
// Libcall - compiler generated libcall names must start with .lib.
// This id will be used to emit extern decls for libcalls.
// Example - libcall name: @.lib.sra.i8
// To pass args: @.lib.sra.i8.args.
// To return val: @.lib.sra.i8.ret.
//----------------------------------------------
// SECTION Names
// uninitialized globals - @udata.<num>.#
// initialized globals - @idata.<num>.#
// Function frame - @<func>.frame_section.
// Function autos - @<func>.autos_section.
// Declarations - Enclosed in comments. No section for them.
//----------------------------------------------------------
// Tags used to mangle different names.
enum TAGS {
PREFIX_SYMBOL,
GLOBAL,
STATIC_LOCAL,
AUTOS_LABEL,
FRAME_LABEL,
RET_LABEL,
ARGS_LABEL,
TEMPS_LABEL,
LIBCALL,
FRAME_SECTION,
AUTOS_SECTION,
CODE_SECTION,
USER_SECTION
};
// Textual names of the tags.
inline static const char *getTagName(TAGS tag) {
switch (tag) {
default: return "";
case PREFIX_SYMBOL: return "@";
case AUTOS_LABEL: return ".auto.";
case FRAME_LABEL: return ".frame.";
case TEMPS_LABEL: return ".temp.";
case ARGS_LABEL: return ".args.";
case RET_LABEL: return ".ret.";
case LIBCALL: return ".lib.";
case FRAME_SECTION: return ".frame_section.";
case AUTOS_SECTION: return ".autos_section.";
case CODE_SECTION: return ".code_section.";
case USER_SECTION: return ".user_section.";
}
}
// Get tag type for the Symbol.
inline static TAGS getSymbolTag(const std::string &Sym) {
if (Sym.find(getTagName(TEMPS_LABEL)) != std::string::npos)
return TEMPS_LABEL;
if (Sym.find(getTagName(FRAME_LABEL)) != std::string::npos)
return FRAME_LABEL;
if (Sym.find(getTagName(RET_LABEL)) != std::string::npos)
return RET_LABEL;
if (Sym.find(getTagName(ARGS_LABEL)) != std::string::npos)
return ARGS_LABEL;
if (Sym.find(getTagName(AUTOS_LABEL)) != std::string::npos)
return AUTOS_LABEL;
if (Sym.find(getTagName(LIBCALL)) != std::string::npos)
return LIBCALL;
// It does not have any Tag. So its a true global or static local.
if (Sym.find(".") == std::string::npos)
return GLOBAL;
// If a . is there, then it may be static local.
// We should mangle these as well in clang.
if (Sym.find(".") != std::string::npos)
return STATIC_LOCAL;
assert (0 && "Could not determine Symbol's tag");
return PREFIX_SYMBOL; // Silence warning when assertions are turned off.
}
// addPrefix - add prefix symbol to a name if there isn't one already.
inline static std::string addPrefix (const std::string &Name) {
std::string prefix = getTagName (PREFIX_SYMBOL);
// If this name already has a prefix, nothing to do.
if (Name.compare(0, prefix.size(), prefix) == 0)
return Name;
return prefix + Name;
}
// Get mangled func name from a mangled sym name.
// In all cases func name is the first component before a '.'.
static inline std::string getFuncNameForSym(const std::string &Sym1) {
assert (getSymbolTag(Sym1) != GLOBAL && "not belongs to a function");
std::string Sym = addPrefix(Sym1);
// Position of the . after func name. That's where func name ends.
size_t func_name_end = Sym.find ('.');
return Sym.substr (0, func_name_end);
}
// Get Frame start label for a func.
static std::string getFrameLabel(const std::string &Func) {
std::string Func1 = addPrefix(Func);
std::string tag = getTagName(FRAME_LABEL);
return Func1 + tag;
}
static std::string getRetvalLabel(const std::string &Func) {
std::string Func1 = addPrefix(Func);
std::string tag = getTagName(RET_LABEL);
return Func1 + tag;
}
static std::string getArgsLabel(const std::string &Func) {
std::string Func1 = addPrefix(Func);
std::string tag = getTagName(ARGS_LABEL);
return Func1 + tag;
}
static std::string getTempdataLabel(const std::string &Func) {
std::string Func1 = addPrefix(Func);
std::string tag = getTagName(TEMPS_LABEL);
return Func1 + tag;
}
static std::string getFrameSectionName(const std::string &Func) {
std::string Func1 = addPrefix(Func);
std::string tag = getTagName(FRAME_SECTION);
return Func1 + tag + "#";
}
static std::string getAutosSectionName(const std::string &Func) {
std::string Func1 = addPrefix(Func);
std::string tag = getTagName(AUTOS_SECTION);
return Func1 + tag + "#";
}
static std::string getCodeSectionName(const std::string &Func) {
std::string Func1 = addPrefix(Func);
std::string tag = getTagName(CODE_SECTION);
return Func1 + tag + "#";
}
static std::string getUserSectionName(const std::string &Name) {
std::string sname = addPrefix(Name);;
std::string tag = getTagName(USER_SECTION);
return sname + tag + "#";
}
// udata, romdata and idata section names are generated by a given number.
// @udata.<num>.#
static std::string getUdataSectionName(unsigned num,
std::string prefix = "") {
std::ostringstream o;
o << getTagName(PREFIX_SYMBOL) << prefix << "udata." << num
<< ".#";
return o.str();
}
static std::string getRomdataSectionName() {
return "romdata.#";
}
static std::string getRomdataSectionName(unsigned num,
std::string prefix = "") {
std::ostringstream o;
o << getTagName(PREFIX_SYMBOL) << prefix << "romdata." << num
<< ".#";
return o.str();
}
static std::string getIdataSectionName(unsigned num,
std::string prefix = "") {
std::ostringstream o;
o << getTagName(PREFIX_SYMBOL) << prefix << "idata." << num
<< ".#";
return o.str();
}
inline static bool isLocalName (const std::string &Name) {
if (getSymbolTag(Name) == AUTOS_LABEL)
return true;
return false;
}
inline static bool isMemIntrinsic (const std::string &Name) {
if (Name.compare("@memcpy") == 0 || Name.compare("@memset") == 0 ||
Name.compare("@memmove") == 0) {
return true;
}
return false;
}
inline static bool isLocalToFunc (std::string &Func, std::string &Var) {
if (! isLocalName(Var)) return false;
std::string Func1 = addPrefix(Func);
// Extract func name of the varilable.
const std::string &fname = getFuncNameForSym(Var);
if (fname.compare(Func1) == 0)
return true;
return false;
}
// Get the section for the given external symbol names.
// This tries to find the type (Tag) of the symbol from its mangled name
// and return appropriate section name for it.
static inline std::string getSectionNameForSym(const std::string &Sym1) {
std::string Sym = addPrefix(Sym1);
std::string SectionName;
std::string Fname = getFuncNameForSym (Sym);
TAGS id = getSymbolTag (Sym);
switch (id) {
default : assert (0 && "Could not determine external symbol type");
case FRAME_LABEL:
case RET_LABEL:
case TEMPS_LABEL:
case ARGS_LABEL: {
return getFrameSectionName(Fname);
}
case AUTOS_LABEL: {
return getAutosSectionName(Fname);
}
}
}
}; // class PAN.
} // end namespace llvm;
#endif

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lib/Target/PIC16/PIC16Section.cpp Normal file
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//===-- PIC16Section.cpp - PIC16 Section ----------- --------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "PIC16.h"
#include "PIC16ABINames.h"
#include "PIC16Section.h"
#include "llvm/MC/MCContext.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
// This is the only way to create a PIC16Section. Sections created here
// do not need to be explicitly deleted as they are managed by auto_ptrs.
PIC16Section *PIC16Section::Create(const StringRef &Name,
PIC16SectionType Ty,
const std::string &Address,
int Color, MCContext &Ctx) {
/// Determine the internal SectionKind info.
/// Users of PIC16Section class should not need to know the internal
/// SectionKind. They should work only with PIC16SectionType.
///
/// PIC16 Terminology for section kinds is as below.
/// UDATA - BSS
/// IDATA - initialized data (equiv to Metadata)
/// ROMDATA - ReadOnly.
/// UDATA_OVR - Sections that can be overlaid. Section of such type is
/// used to contain function autos an frame. We can think of
/// it as equiv to llvm ThreadBSS)
/// UDATA_SHR - Shared RAM. Memory area that is mapped to all banks.
SectionKind K;
switch (Ty) {
default: llvm_unreachable ("can not create unknown section type");
case UDATA_OVR: {
K = SectionKind::getThreadBSS();
break;
}
case UDATA_SHR:
case UDATA: {
K = SectionKind::getBSS();
break;
}
case ROMDATA:
case IDATA: {
K = SectionKind::getMetadata();
break;
}
case CODE: {
K = SectionKind::getText();
break;
}
}
// Create the Section.
PIC16Section *S = new (Ctx) PIC16Section(Name, K, Address, Color);
S->T = Ty;
return S;
}
// A generic way to print all types of sections.
void PIC16Section::PrintSwitchToSection(const MCAsmInfo &MAI,
raw_ostream &OS) const {
// Print name.
OS << getName() << '\t';
// Print type.
switch (getType()) {
default : llvm_unreachable ("unknown section type");
case UDATA: OS << "UDATA"; break;
case IDATA: OS << "IDATA"; break;
case ROMDATA: OS << "ROMDATA"; break;
case UDATA_SHR: OS << "UDATA_SHR"; break;
case UDATA_OVR: OS << "UDATA_OVR"; break;
case CODE: OS << "CODE"; break;
}
OS << '\t';
// Print Address.
OS << Address;
OS << '\n';
}

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lib/Target/PIC16/PIC16Section.h Normal file
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//===- PIC16Section.h - PIC16-specific section representation -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the PIC16Section class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_PIC16SECTION_H
#define LLVM_PIC16SECTION_H
#include "llvm/MC/MCSection.h"
#include "llvm/GlobalVariable.h"
#include <vector>
namespace llvm {
/// PIC16Section - Represents a physical section in PIC16 COFF.
/// Contains data objects.
///
class PIC16Section : public MCSection {
/// PIC16 Sections does not really use the SectionKind class to
/// to distinguish between various types of sections. PIC16 maintain
/// its own Section Type info. See the PIC16SectionType enum in PIC16.h
/// for various section types.
PIC16SectionType T;
/// Name of the section to uniquely identify it.
std::string Name;
/// User can specify an address at which a section should be placed.
/// Negative value here means user hasn't specified any.
std::string Address;
/// Overlay information - Sections with same color can be overlaid on
/// one another.
int Color;
/// Total size of all data objects contained here.
unsigned Size;
PIC16Section(const StringRef &name, SectionKind K, const std::string &addr,
int color)
: MCSection(K), Name(name), Address(addr), Color(color) {
}
public:
/// Return the name of the section.
const std::string &getName() const { return Name; }
/// Return the Address of the section.
const std::string &getAddress() const { return Address; }
/// Return the Color of the section.
int getColor() const { return Color; }
/// Return the size of the section.
unsigned getSize() const { return Size; }
void setSize(unsigned size) { Size = size; }
/// Conatined data objects.
std::vector<const GlobalVariable *>Items;
/// Check section type.
bool isUDATA_Type() const { return T == UDATA; }
bool isIDATA_Type() const { return T == IDATA; }
bool isROMDATA_Type() const { return T == ROMDATA; }
bool isUDATA_OVR_Type() const { return T == UDATA_OVR; }
bool isUDATA_SHR_Type() const { return T == UDATA_SHR; }
bool isCODE_Type() const { return T == CODE; }
PIC16SectionType getType() const { return T; }
/// This would be the only way to create a section.
static PIC16Section *Create(const StringRef &Name, PIC16SectionType Ty,
const std::string &Address, int Color,
MCContext &Ctx);
/// Override this as PIC16 has its own way of printing switching
/// to a section.
virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
raw_ostream &OS) const;
};
} // end namespace llvm
#endif