50 lines
1.5 KiB
C++
50 lines
1.5 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 was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source 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/Passes.h"
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#include "llvm/Support/CommandLine.h"
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#include <iostream>
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using namespace llvm;
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namespace {
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enum RegAllocName { simple, local, linearscan };
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cl::opt<RegAllocName>
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RegAlloc(
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"regalloc",
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cl::desc("Register allocator to use: (default = linearscan)"),
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cl::Prefix,
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cl::values(
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clEnumVal(simple, " simple register allocator"),
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clEnumVal(local, " local register allocator"),
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clEnumVal(linearscan, " linear scan register allocator"),
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clEnumValEnd),
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cl::init(linearscan));
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}
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FunctionPass *llvm::createRegisterAllocator() {
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switch (RegAlloc) {
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default:
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std::cerr << "no register allocator selected";
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abort();
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case simple:
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return createSimpleRegisterAllocator();
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case local:
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return createLocalRegisterAllocator();
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case linearscan:
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return createLinearScanRegisterAllocator();
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}
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}
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