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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/Passes.h"
#include "llvm/Support/CommandLine.h"
#include <iostream>
using namespace llvm;
namespace {
enum RegAllocName { simple, local, linearscan };
cl::opt<RegAllocName>
RegAlloc(
"regalloc",
cl::desc("Register allocator to use: (default = linearscan)"),
cl::Prefix,
cl::values(
clEnumVal(simple, " simple register allocator"),
clEnumVal(local, " local register allocator"),
clEnumVal(linearscan, " linear scan register allocator"),
clEnumValEnd),
cl::init(linearscan));
}
FunctionPass *llvm::createRegisterAllocator() {
switch (RegAlloc) {
default:
std::cerr << "no register allocator selected";
abort();
case simple:
return createSimpleRegisterAllocator();
case local:
return createLocalRegisterAllocator();
case linearscan:
return createLinearScanRegisterAllocator();
}
}
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