mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
9231ac8b6f
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13754 91177308-0d34-0410-b5e6-96231b3b80d8
94 lines
3.7 KiB
C++
94 lines
3.7 KiB
C++
//===- CloneModule.cpp - Clone an entire module ---------------------------===//
|
|
//
|
|
// 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the CloneModule interface which makes a copy of an
|
|
// entire module.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Transforms/Utils/Cloning.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
#include "llvm/SymbolTable.h"
|
|
#include "llvm/Constant.h"
|
|
#include "ValueMapper.h"
|
|
using namespace llvm;
|
|
|
|
/// CloneModule - Return an exact copy of the specified module. This is not as
|
|
/// easy as it might seem because we have to worry about making copies of global
|
|
/// variables and functions, and making their (initializers and references,
|
|
/// respectively) refer to the right globals.
|
|
///
|
|
Module *llvm::CloneModule(const Module *M) {
|
|
// First off, we need to create the new module...
|
|
Module *New = new Module(M->getModuleIdentifier());
|
|
New->setEndianness(M->getEndianness());
|
|
New->setPointerSize(M->getPointerSize());
|
|
|
|
// Copy all of the type symbol table entries over...
|
|
const SymbolTable &SymTab = M->getSymbolTable();
|
|
SymbolTable::type_const_iterator TypeI = SymTab.type_begin();
|
|
SymbolTable::type_const_iterator TypeE = SymTab.type_end();
|
|
for ( ; TypeI != TypeE; ++TypeI ) {
|
|
New->addTypeName(TypeI->first, TypeI->second);
|
|
}
|
|
|
|
// Create the value map that maps things from the old module over to the new
|
|
// module.
|
|
std::map<const Value*, Value*> ValueMap;
|
|
|
|
// Loop over all of the global variables, making corresponding globals in the
|
|
// new module. Here we add them to the ValueMap and to the new Module. We
|
|
// don't worry about attributes or initializers, they will come later.
|
|
//
|
|
for (Module::const_giterator I = M->gbegin(), E = M->gend(); I != E; ++I)
|
|
ValueMap[I] = new GlobalVariable(I->getType()->getElementType(), false,
|
|
GlobalValue::ExternalLinkage, 0,
|
|
I->getName(), New);
|
|
|
|
// Loop over the functions in the module, making external functions as before
|
|
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
|
|
ValueMap[I]=new Function(cast<FunctionType>(I->getType()->getElementType()),
|
|
GlobalValue::ExternalLinkage, I->getName(), New);
|
|
|
|
// Now that all of the things that global variable initializer can refer to
|
|
// have been created, loop through and copy the global variable referrers
|
|
// over... We also set the attributes on the global now.
|
|
//
|
|
for (Module::const_giterator I = M->gbegin(), E = M->gend(); I != E; ++I) {
|
|
GlobalVariable *GV = cast<GlobalVariable>(ValueMap[I]);
|
|
if (I->hasInitializer())
|
|
GV->setInitializer(cast<Constant>(MapValue(I->getInitializer(),
|
|
ValueMap)));
|
|
GV->setLinkage(I->getLinkage());
|
|
}
|
|
|
|
// Similarly, copy over function bodies now...
|
|
//
|
|
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
|
|
Function *F = cast<Function>(ValueMap[I]);
|
|
if (!I->isExternal()) {
|
|
Function::aiterator DestI = F->abegin();
|
|
for (Function::const_aiterator J = I->abegin(); J != I->aend(); ++J) {
|
|
DestI->setName(J->getName());
|
|
ValueMap[J] = DestI++;
|
|
}
|
|
|
|
std::vector<ReturnInst*> Returns; // Ignore returns cloned...
|
|
CloneFunctionInto(F, I, ValueMap, Returns);
|
|
}
|
|
|
|
F->setLinkage(I->getLinkage());
|
|
}
|
|
|
|
return New;
|
|
}
|
|
|
|
// vim: sw=2
|