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//===-- llvm/Support/Mangler.h - Self-contained name mangler ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Unified name mangler for various backends.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_MANGLER_H
#define LLVM_SUPPORT_MANGLER_H
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallPtrSet.h"
#include <string>
namespace llvm {
class Type;
class Module;
class Value;
class GlobalValue;
class Mangler {
/// Prefix - This string is added to each symbol that is emitted, unless the
/// symbol is marked as not needing this prefix.
const char *Prefix;
/// UseQuotes - If this is set, the target accepts global names in quotes,
/// e.g. "foo bar" is a legal name. This syntax is used instead of escaping
/// the space character. By default, this is false.
bool UseQuotes;
/// PreserveAsmNames - If this is set, the asm escape character is not removed
/// from names with 'asm' specifiers.
bool PreserveAsmNames;
/// Memo - This is used to remember the name that we assign a value.
///
DenseMap<const Value*, std::string> Memo;
/// Count - This simple counter is used to unique value names.
///
unsigned Count;
/// TypeMap - If the client wants us to unique types, this keeps track of the
/// current assignments and TypeCounter keeps track of the next id to assign.
DenseMap<const Type*, unsigned> TypeMap;
unsigned TypeCounter;
/// This keeps track of which global values have had their names
/// mangled in the current module.
///
SmallPtrSet<const GlobalValue*, 16> MangledGlobals;
/// AcceptableChars - This bitfield contains a one for each character that is
/// allowed to be part of an unmangled name.
unsigned AcceptableChars[256/32];
public:
// Mangler ctor - if a prefix is specified, it will be prepended onto all
// symbols.
Mangler(Module &M, const char *Prefix = "");
/// setUseQuotes - If UseQuotes is set to true, this target accepts quoted
/// strings for assembler labels.
void setUseQuotes(bool Val) { UseQuotes = Val; }
/// setPreserveAsmNames - If the mangler should not strip off the asm name
/// @verbatim identifier (\001), this should be set. @endverbatim
void setPreserveAsmNames(bool Val) { PreserveAsmNames = Val; }
/// Acceptable Characters - This allows the target to specify which characters
/// are acceptable to the assembler without being mangled. By default we
/// allow letters, numbers, '_', '$', and '.', which is what GAS accepts.
void markCharAcceptable(unsigned char X) {
AcceptableChars[X/32] |= 1 << (X&31);
}
void markCharUnacceptable(unsigned char X) {
AcceptableChars[X/32] &= ~(1 << (X&31));
}
bool isCharAcceptable(unsigned char X) const {
return (AcceptableChars[X/32] & (1 << (X&31))) != 0;
}
/// getValueName - Returns the mangled name of V, an LLVM Value,
/// in the current module.
///
std::string getValueName(const GlobalValue *V, const char *Suffix = "");
std::string getValueName(const Value *V);
/// makeNameProper - We don't want identifier names with ., space, or
/// - in them, so we mangle these characters into the strings "d_",
/// "s_", and "D_", respectively. This is a very simple mangling that
/// doesn't guarantee unique names for values. getValueName already
/// does this for you, so there's no point calling it on the result
/// from getValueName.
///
std::string makeNameProper(const std::string &x, const char *Prefix = "");
private:
/// getTypeID - Return a unique ID for the specified LLVM type.
///
unsigned getTypeID(const Type *Ty);
};
} // End llvm namespace
#endif // LLVM_SUPPORT_MANGLER_H
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