forked from OSchip/llvm-project
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
//===-- Passes.cpp - Target independent code generation passes ------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines interfaces to access the target independent code
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// generation passes provided by the LLVM backend.
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//
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//===---------------------------------------------------------------------===//
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#include "llvm/CodeGen/RegAllocRegistry.h"
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#include "llvm/CodeGen/Passes.h"
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using namespace llvm;
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//===---------------------------------------------------------------------===//
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///
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/// RegisterRegAlloc class - Track the registration of register allocators.
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///
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//===---------------------------------------------------------------------===//
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MachinePassRegistry RegisterRegAlloc::Registry;
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//===---------------------------------------------------------------------===//
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///
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/// RegAlloc command line options.
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///
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//===---------------------------------------------------------------------===//
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static cl::opt<RegisterRegAlloc::FunctionPassCtor, false,
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RegisterPassParser<RegisterRegAlloc> >
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RegAlloc("regalloc",
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cl::init(&createLinearScanRegisterAllocator),
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cl::desc("Register allocator to use: (default = linearscan)"));
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//===---------------------------------------------------------------------===//
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///
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/// createRegisterAllocator - choose the appropriate register allocator.
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///
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//===---------------------------------------------------------------------===//
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FunctionPass *llvm::createRegisterAllocator() {
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RegisterRegAlloc::FunctionPassCtor Ctor = RegisterRegAlloc::getDefault();
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if (!Ctor) {
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Ctor = RegAlloc;
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RegisterRegAlloc::setDefault(RegAlloc);
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}
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return Ctor();
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}
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