-//===-- MipsMachineFunctionInfo.cpp - Private data used for Mips --*- C++ -*-=//
+//===-- MipsMachineFunctionInfo.cpp - Private data used for Mips ----------===//
//
// The LLVM Compiler Infrastructure
//
//===----------------------------------------------------------------------===//
#include "MipsMachineFunction.h"
+#include "MipsInstrInfo.h"
+#include "MipsSubtarget.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
+#include "llvm/Function.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/Support/CommandLine.h"
using namespace llvm;
+static cl::opt<bool>
+FixGlobalBaseReg("mips-fix-global-base-reg", cl::Hidden, cl::init(true),
+ cl::desc("Always use $gp as the global base register."));
+
+bool MipsFunctionInfo::globalBaseRegFixed() const {
+ return FixGlobalBaseReg;
+}
+
+bool MipsFunctionInfo::globalBaseRegSet() const {
+ return GlobalBaseReg;
+}
+
+unsigned MipsFunctionInfo::getGlobalBaseReg() {
+ // Return if it has already been initialized.
+ if (GlobalBaseReg)
+ return GlobalBaseReg;
+
+ const MipsSubtarget &ST = MF.getTarget().getSubtarget<MipsSubtarget>();
+
+ if (FixGlobalBaseReg) // $gp is the global base register.
+ return GlobalBaseReg = ST.isABI_N64() ? Mips::GP_64 : Mips::GP;
+
+ const TargetRegisterClass *RC;
+ RC = ST.isABI_N64() ?
+ Mips::CPU64RegsRegisterClass : Mips::CPURegsRegisterClass;
+
+ return GlobalBaseReg = MF.getRegInfo().createVirtualRegister(RC);
+}
+
void MipsFunctionInfo::anchor() { }