src/arm/register-allocator-arm.cc

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#include "v8.h"

#include "codegen-inl.h"
#include "register-allocator-inl.h"

namespace v8 { namespace internal {

// -------------------------------------------------------------------------
// Result implementation.

void Result::ToRegister() {
  UNIMPLEMENTED();
}


void Result::ToRegister(Register target) {
  UNIMPLEMENTED();
}


// -------------------------------------------------------------------------
// RegisterAllocator implementation.

RegisterFile RegisterAllocator::Reserved() {
  RegisterFile reserved;
  reserved.Use(sp);
  reserved.Use(fp);
  reserved.Use(cp);
  reserved.Use(pc);
  return reserved;
}


void RegisterAllocator::UnuseReserved(RegisterFile* register_file) {
  register_file->ref_counts_[sp.code()] = 0;
  register_file->ref_counts_[fp.code()] = 0;
  register_file->ref_counts_[cp.code()] = 0;
  register_file->ref_counts_[pc.code()] = 0;
}


void RegisterAllocator::Initialize() {
  Reset();
  // The following registers are live on function entry, saved in the
  // frame, and available for allocation during execution.
  Use(r1);  // JS function.
  Use(lr);  // Return address.
}


void RegisterAllocator::Reset() {
  registers_.Reset();
  // The following registers are live on function entry and reserved
  // during execution.
  Use(sp);  // Stack pointer.
  Use(fp);  // Frame pointer (caller's frame pointer on entry).
  Use(cp);  // Context context (callee's context on entry).
  Use(pc);  // Program counter.
}


Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() {
  UNIMPLEMENTED();
  Result invalid(cgen_);
  return invalid;
}


} }  // namespace v8::internal