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5b7dfeebff
(uniqued if unnamed) global variable name with the prefix that it is supposed to get. It doesn't do "mangling" in the sense of adding quotes and hacking on bad characters. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81505 91177308-0d34-0410-b5e6-96231b3b80d8
119 lines
4.3 KiB
C++
119 lines
4.3 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 "llvm/ADT/SmallPtrSet.h"
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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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template <typename T> class SmallVectorImpl;
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class Mangler {
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public:
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enum ManglerPrefixTy {
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Default, ///< Emit default string before each symbol.
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Private, ///< Emit "private" prefix before each symbol.
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LinkerPrivate ///< Emit "linker private" prefix before each symbol.
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};
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private:
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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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/// PrivatePrefix - This string is emitted before each symbol with private
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/// linkage.
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const char *PrivatePrefix;
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/// LinkerPrivatePrefix - This string is emitted before each symbol with
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/// "linker_private" linkage.
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const char *LinkerPrivatePrefix;
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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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/// AnonGlobalIDs - We need to give global values the same name every time
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/// they are mangled. This keeps track of the number we give to anonymous
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/// ones.
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///
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DenseMap<const GlobalValue*, unsigned> AnonGlobalIDs;
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/// NextAnonGlobalID - This simple counter is used to unique value names.
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///
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unsigned NextAnonGlobalID;
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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 = "", const char *privatePrefix = "",
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const char *linkerPrivatePrefix = "");
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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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/// 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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/// getMangledName - Returns the mangled name of V, an LLVM Value,
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/// in the current module. If 'Suffix' is specified, the name ends with the
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/// specified suffix. If 'ForcePrivate' is specified, the label is specified
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/// to have a private label prefix.
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///
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std::string getMangledName(const GlobalValue *V, const char *Suffix = "",
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bool ForcePrivate = false);
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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,
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ManglerPrefixTy PrefixTy = Mangler::Default);
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/// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
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/// and the specified global variable's name. If the global variable doesn't
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/// have a name, this fills in a unique name for the global.
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void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
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bool isImplicitlyPrivate);
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};
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} // End llvm namespace
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#endif // LLVM_SUPPORT_MANGLER_H
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