| //===-- 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::getCache(); |
| |
| if (!Ctor) { |
| Ctor = RegisterRegAlloc::FindCtor(RegAlloc); |
| assert(Ctor && "No register allocator found"); |
| if (!Ctor) Ctor = RegisterRegAlloc::FirstCtor(); |
| RegisterRegAlloc::setCache(Ctor); |
| } |
| |
| assert(Ctor && "No register allocator found"); |
| |
| return Ctor(); |
| } |