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//===- MRegisterInfo.cpp - Target Register Information Implementation -----===//
//
// This file implements the MRegisterInfo interface.
//
//===----------------------------------------------------------------------===//
#include "llvm/Target/MRegisterInfo.h"
MRegisterInfo::MRegisterInfo(const MRegisterDesc *D, unsigned NR,
regclass_iterator RCB, regclass_iterator RCE)
: Desc(D), NumRegs(NR), RegClassBegin(RCB), RegClassEnd(RCE) {
assert(NumRegs < FirstVirtualRegister &&
"Target has too many physical registers!");
PhysRegClasses = new const TargetRegisterClass*[NumRegs];
for (unsigned i = 0; i != NumRegs; ++i)
PhysRegClasses[i] = 0;
// Fill in the PhysRegClasses map
for (MRegisterInfo::regclass_iterator I = regclass_begin(),
E = regclass_end(); I != E; ++I)
for (unsigned i=0; i < (*I)->getNumRegs(); ++i) {
assert(PhysRegClasses[(*I)->getRegister(i)] == 0 &&
"Register in more than one class?");
PhysRegClasses[(*I)->getRegister(i)] = *I;
}
}
MRegisterInfo::~MRegisterInfo() {
delete[] PhysRegClasses;
}
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