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