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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5097 91177308-0d34-0410-b5e6-96231b3b80d8
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lib/Target/MRegisterInfo.cpp
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32
lib/Target/MRegisterInfo.cpp
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//===- MRegisterInfo.cpp - Target Register Information Implementation -----===//
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//
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// This file implements the MRegisterInfo interface.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Target/MRegisterInfo.h"
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MRegisterInfo::MRegisterInfo(const MRegisterDesc *D, unsigned NR,
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regclass_iterator RCB, regclass_iterator RCE)
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: Desc(D), NumRegs(NR), RegClassBegin(RCB), RegClassEnd(RCE) {
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assert(NumRegs < FirstVirtualRegister &&
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"Target has too many physical registers!");
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PhysRegClasses = new const TargetRegisterClass*[NumRegs];
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for (unsigned i = 0; i != NumRegs; ++i)
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PhysRegClasses[i] = 0;
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// Fill in the PhysRegClasses map
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for (MRegisterInfo::regclass_iterator I = regclass_begin(),
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E = regclass_end(); I != E; ++I)
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for (unsigned i=0; i < (*I)->getNumRegs(); ++i) {
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assert(PhysRegClasses[(*I)->getRegister(i)] == 0 &&
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"Register in more than one class?");
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PhysRegClasses[(*I)->getRegister(i)] = *I;
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}
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}
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MRegisterInfo::~MRegisterInfo() {
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delete[] PhysRegClasses;
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}
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