mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 00:32:23 +00:00
e4d5c441e0
using Function::arg_{iterator|begin|end}. Likewise Module::g* -> Module::global_*.
This patch is contributed by Gabor Greif, thanks!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20597 91177308-0d34-0410-b5e6-96231b3b80d8
127 lines
4.1 KiB
C++
127 lines
4.1 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 "llvm/ADT/StringExtras.h"
|
|
using namespace llvm;
|
|
|
|
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;
|
|
}
|
|
|
|
/// getTypeID - Return a unique ID for the specified LLVM type.
|
|
///
|
|
unsigned Mangler::getTypeID(const Type *Ty) {
|
|
unsigned &E = TypeMap[Ty];
|
|
if (E == 0) E = ++TypeCounter;
|
|
return E;
|
|
}
|
|
|
|
|
|
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 an intrinsic function, do not change name at all
|
|
// - 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 && isa<Function>(gv) && cast<Function>(gv)->getIntrinsicID()) {
|
|
name = gv->getName(); // Is an intrinsic function
|
|
} else if (gv && !gv->hasInternalLinkage() && !MangledGlobals.count(gv)) {
|
|
name = Prefix + makeNameProper(gv->getName());
|
|
} else {
|
|
// Non-global, or global with internal linkage / colliding name
|
|
// -> mangle.
|
|
unsigned TypeUniqueID = getTypeID(V->getType());
|
|
name = "l" + utostr(TypeUniqueID) + "_" + makeNameProper(V->getName());
|
|
}
|
|
} else {
|
|
name = "ltmp_" + utostr(Count++) + "_" + utostr(getTypeID(V->getType()));
|
|
}
|
|
|
|
Memo[V] = name;
|
|
return name;
|
|
}
|
|
|
|
void Mangler::InsertName(GlobalValue *GV,
|
|
std::map<std::string, GlobalValue*> &Names) {
|
|
if (!GV->hasName()) { // We must mangle unnamed globals.
|
|
MangledGlobals.insert(GV);
|
|
return;
|
|
}
|
|
|
|
// Figure out if this is already used.
|
|
GlobalValue *&ExistingValue = Names[GV->getName()];
|
|
if (!ExistingValue) {
|
|
ExistingValue = GV;
|
|
} else {
|
|
// If GV is external but the existing one is static, mangle the existing one
|
|
if (GV->hasExternalLinkage() && !ExistingValue->hasExternalLinkage()) {
|
|
MangledGlobals.insert(ExistingValue);
|
|
ExistingValue = GV;
|
|
} else {
|
|
// Otherwise, mangle GV
|
|
MangledGlobals.insert(GV);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
Mangler::Mangler(Module &m, const char *prefix)
|
|
: M(m), Prefix(prefix), TypeCounter(0), Count(0) {
|
|
// Calculate which global values have names that will collide when we throw
|
|
// away type information.
|
|
std::map<std::string, GlobalValue*> Names;
|
|
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
|
|
InsertName(I, Names);
|
|
for (Module::global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
|
|
InsertName(I, Names);
|
|
}
|