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https://github.com/c64scene-ar/llvm-6502.git
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34d9bc9f16
251 (providing a generic machine code rewriter/spiller). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11780 91177308-0d34-0410-b5e6-96231b3b80d8
56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
//===-- llvm/CodeGen/VirtRegMap.cpp - Virtual Register Map ----------------===//
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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 implements the virtual register map.
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//
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//===----------------------------------------------------------------------===//
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#include "VirtRegMap.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/Target/TargetMachine.h"
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#include "Support/Statistic.h"
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#include <iostream>
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using namespace llvm;
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namespace {
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Statistic<> numSpills("ra-linearscan", "Number of register spills");
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}
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int VirtRegMap::assignVirt2StackSlot(unsigned virtReg)
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{
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assert(MRegisterInfo::isVirtualRegister(virtReg));
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assert(v2ssMap_[toIndex(virtReg)] == NO_STACK_SLOT &&
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"attempt to assign stack slot to already spilled register");
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const TargetRegisterClass* rc =
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mf_->getSSARegMap()->getRegClass(virtReg);
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int frameIndex = mf_->getFrameInfo()->CreateStackObject(rc);
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v2ssMap_[toIndex(virtReg)] = frameIndex;
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++numSpills;
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return frameIndex;
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}
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std::ostream& llvm::operator<<(std::ostream& os, const VirtRegMap& vrm)
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{
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const MRegisterInfo* mri = vrm.mf_->getTarget().getRegisterInfo();
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std::cerr << "********** REGISTER MAP **********\n";
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for (unsigned i = 0, e = vrm.v2pMap_.size(); i != e; ++i) {
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if (vrm.v2pMap_[i] != VirtRegMap::NO_PHYS_REG)
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std::cerr << "[reg" << VirtRegMap::fromIndex(i) << " -> "
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<< mri->getName(vrm.v2pMap_[i]) << "]\n";
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}
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for (unsigned i = 0, e = vrm.v2ssMap_.size(); i != e; ++i) {
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if (vrm.v2ssMap_[i] != VirtRegMap::NO_STACK_SLOT)
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std::cerr << "[reg" << VirtRegMap::fromIndex(i) << " -> fi#"
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<< vrm.v2ssMap_[i] << "]\n";
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}
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return std::cerr << '\n';
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}
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