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//===-- Passes.cpp - Target independent code generation passes ------------===//
//
// 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 defines interfaces to access the target independent code
// generation passes provided by the LLVM backend.
//
//===---------------------------------------------------------------------===//
#include "llvm/CodeGen/MachinePassRegistry.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/CommandLine.h"
#include <iostream>
using namespace llvm;
namespace {
cl::opt<const char *, false, RegisterPassParser<RegisterRegAlloc> >
RegAlloc("regalloc",
cl::init("linearscan"),
cl::desc("Register allocator to use: (default = linearscan)"));
}
FunctionPass *llvm::createRegisterAllocator() {
RegisterRegAlloc::FunctionPassCtor Ctor = RegisterRegAlloc::getDefault();
if (!Ctor) {
Ctor = RegisterRegAlloc::FindCtor(RegAlloc);
assert(Ctor && "No register allocator found");
if (!Ctor) Ctor = RegisterRegAlloc::FirstCtor();
RegisterRegAlloc::setDefault(Ctor);
}
assert(Ctor && "No register allocator found");
return Ctor();
}
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