mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-10-31 09:11:13 +00:00
2b3860faeb
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7741 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
//===-- Mangler.cpp - Self-contained c/asm llvm name mangler --------------===//
|
|
//
|
|
// 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"
|
|
|
|
/// 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.
|
|
///
|
|
std::string Mangler::makeNameProper(const std::string &x) {
|
|
std::string tmp;
|
|
for (std::string::const_iterator sI = x.begin(), sEnd = x.end();
|
|
sI != sEnd; sI++)
|
|
switch (*sI) {
|
|
case '.': tmp += "d_"; break;
|
|
case ' ': tmp += "s_"; break;
|
|
case '-': tmp += "D_"; break;
|
|
default: tmp += *sI;
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
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
|
|
}
|
|
|