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takes a twine. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93687 91177308-0d34-0410-b5e6-96231b3b80d8
89 lines
3.3 KiB
C++
89 lines
3.3 KiB
C++
//===-- Mangler.cpp - Self-contained c/asm llvm name mangler --------------===//
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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 assembly backends.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Target/Mangler.h"
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#include "llvm/GlobalValue.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Twine.h"
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using namespace llvm;
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/// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
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/// and the specified name as the global variable name. GVName must not be
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/// empty.
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void Mangler::getNameWithPrefix(SmallVectorImpl<char> &OutName,
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const Twine &GVName, ManglerPrefixTy PrefixTy) {
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SmallString<256> TmpData;
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StringRef Name = GVName.toStringRef(TmpData);
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assert(!Name.empty() && "getNameWithPrefix requires non-empty name");
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// If the global name is not led with \1, add the appropriate prefixes.
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if (Name[0] != '\1') {
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if (PrefixTy == Mangler::Private) {
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const char *Prefix = MAI.getPrivateGlobalPrefix();
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OutName.append(Prefix, Prefix+strlen(Prefix));
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} else if (PrefixTy == Mangler::LinkerPrivate) {
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const char *Prefix = MAI.getLinkerPrivateGlobalPrefix();
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OutName.append(Prefix, Prefix+strlen(Prefix));
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}
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const char *Prefix = MAI.getGlobalPrefix();
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if (Prefix[0] == 0)
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; // Common noop, no prefix.
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else if (Prefix[1] == 0)
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OutName.push_back(Prefix[0]); // Common, one character prefix.
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else
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OutName.append(Prefix, Prefix+strlen(Prefix)); // Arbitrary length prefix.
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} else {
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Name = Name.substr(1);
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}
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OutName.append(Name.begin(), Name.end());
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}
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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 Mangler::getNameWithPrefix(SmallVectorImpl<char> &OutName,
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const GlobalValue *GV,
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bool isImplicitlyPrivate) {
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ManglerPrefixTy PrefixTy = Mangler::Default;
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if (GV->hasPrivateLinkage() || isImplicitlyPrivate)
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PrefixTy = Mangler::Private;
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else if (GV->hasLinkerPrivateLinkage())
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PrefixTy = Mangler::LinkerPrivate;
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// If this global has a name, handle it simply.
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if (GV->hasName())
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return getNameWithPrefix(OutName, GV->getName(), PrefixTy);
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// Get the ID for the global, assigning a new one if we haven't got one
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// already.
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unsigned &ID = AnonGlobalIDs[GV];
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if (ID == 0) ID = NextAnonGlobalID++;
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// Must mangle the global into a unique ID.
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getNameWithPrefix(OutName, "__unnamed_" + Twine(ID), PrefixTy);
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}
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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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std::string Mangler::getNameWithPrefix(const GlobalValue *GV,
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bool isImplicitlyPrivate) {
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SmallString<64> Buf;
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getNameWithPrefix(Buf, GV, isImplicitlyPrivate);
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return std::string(Buf.begin(), Buf.end());
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}
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