mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 00:11:00 +00:00
b576c94c15
Header files will be on the way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9298 91177308-0d34-0410-b5e6-96231b3b80d8
102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
//===-- Mangler.cpp - Self-contained c/asm llvm name mangler --------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Unified name mangler for CWriter and assembly backends.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/Mangler.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/Type.h"
|
|
#include "Support/StringExtras.h"
|
|
|
|
static char HexDigit(int V) {
|
|
return V < 10 ? V+'0' : V+'A'-10;
|
|
}
|
|
|
|
static std::string MangleLetter(unsigned char C) {
|
|
return std::string("_")+HexDigit(C >> 4) + HexDigit(C & 15) + "_";
|
|
}
|
|
|
|
/// makeNameProper - We don't want identifier names non-C-identifier characters
|
|
/// in them, so mangle them as appropriate.
|
|
///
|
|
std::string Mangler::makeNameProper(const std::string &X) {
|
|
std::string Result;
|
|
|
|
// Mangle the first letter specially, don't allow numbers...
|
|
if ((X[0] < 'a' || X[0] > 'z') && (X[0] < 'A' || X[0] > 'Z') && X[0] != '_')
|
|
Result += MangleLetter(X[0]);
|
|
else
|
|
Result += X[0];
|
|
|
|
for (std::string::const_iterator I = X.begin()+1, E = X.end(); I != E; ++I)
|
|
if ((*I < 'a' || *I > 'z') && (*I < 'A' || *I > 'Z') &&
|
|
(*I < '0' || *I > '9') && *I != '_')
|
|
Result += MangleLetter(*I);
|
|
else
|
|
Result += *I;
|
|
return Result;
|
|
}
|
|
|
|
std::string Mangler::getValueName(const Value *V) {
|
|
// Check to see whether we've already named V.
|
|
ValueMap::iterator VI = Memo.find(V);
|
|
if (VI != Memo.end()) {
|
|
return VI->second; // Return the old name for V.
|
|
}
|
|
|
|
std::string name;
|
|
if (V->hasName()) { // Print out the label if it exists...
|
|
// Name mangling occurs as follows:
|
|
// - If V is not a global, mangling always occurs.
|
|
// - Otherwise, mangling occurs when any of the following are true:
|
|
// 1) V has internal linkage
|
|
// 2) V's name would collide if it is not mangled.
|
|
//
|
|
const GlobalValue* gv = dyn_cast<GlobalValue>(V);
|
|
if (gv && !gv->hasInternalLinkage() && !MangledGlobals.count(gv)) {
|
|
name = makeNameProper(gv->getName());
|
|
if (AddUnderscorePrefix) name = "_" + name;
|
|
} else {
|
|
// Non-global, or global with internal linkage / colliding name
|
|
// -> mangle.
|
|
name = "l" + utostr(V->getType()->getUniqueID()) + "_" +
|
|
makeNameProper(V->getName());
|
|
}
|
|
} else {
|
|
name = "ltmp_" + utostr(Count++) + "_"
|
|
+ utostr(V->getType()->getUniqueID());
|
|
}
|
|
|
|
Memo[V] = name;
|
|
return name;
|
|
}
|
|
|
|
Mangler::Mangler(Module &m, bool addUnderscorePrefix)
|
|
: M(m), AddUnderscorePrefix(addUnderscorePrefix) {
|
|
// Calculate which global values have names that will collide when we throw
|
|
// away type information.
|
|
std::set<std::string> FoundNames;
|
|
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
|
|
if (I->hasName()) // If the global has a name...
|
|
if (FoundNames.count(I->getName())) // And the name is already used
|
|
MangledGlobals.insert(I); // Mangle the name
|
|
else
|
|
FoundNames.insert(I->getName()); // Otherwise, keep track of name
|
|
|
|
for (Module::giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
|
|
if (I->hasName()) // If the global has a name...
|
|
if (FoundNames.count(I->getName())) // And the name is already used
|
|
MangledGlobals.insert(I); // Mangle the name
|
|
else
|
|
FoundNames.insert(I->getName()); // Otherwise, keep track of name
|
|
}
|
|
|