/// started.
BitVector ReservedRegs;
-#ifdef LLVM_BUILD_GLOBAL_ISEL
+ typedef DenseMap<unsigned, unsigned> VRegToSizeMap;
/// Map generic virtual registers to their actual size.
- DenseMap<unsigned, unsigned> VRegToSize;
-#endif
+ mutable std::unique_ptr<VRegToSizeMap> VRegToSize;
+
+ /// Accessor for VRegToSize. This accessor should only be used
+ /// by global-isel related work.
+ VRegToSizeMap &getVRegToSize() const {
+ if (!VRegToSize)
+ VRegToSize.reset(new VRegToSizeMap);
+ return *VRegToSize.get();
+ }
/// Keep track of the physical registers that are live in to the function.
/// Live in values are typically arguments in registers. LiveIn values are
///
unsigned createVirtualRegister(const TargetRegisterClass *RegClass);
-#ifdef LLVM_BUILD_GLOBAL_ISEL
/// Get the size of \p VReg or 0 if VReg is not a generic
/// (target independent) virtual register.
unsigned getSize(unsigned VReg) const;
/// Create and return a new generic virtual register with a size of \p Size.
/// \pre Size > 0.
unsigned createGenericVirtualRegister(unsigned Size);
-#endif
/// getNumVirtRegs - Return the number of virtual registers created.
///
return Reg;
}
-#ifdef LLVM_BUILD_GLOBAL_ISEL
unsigned
MachineRegisterInfo::getSize(unsigned VReg) const {
- DenseMap<unsigned, unsigned>::const_iterator SizeIt =
- VRegToSize.find(VReg);
- return SizeIt != VRegToSize.end()? SizeIt->second: 0;
+ VRegToSizeMap::const_iterator SizeIt = getVRegToSize().find(VReg);
+ return SizeIt != getVRegToSize().end() ? SizeIt->second : 0;
}
unsigned
VRegInfo.grow(Reg);
// FIXME: Should we use a dummy register class?
VRegInfo[Reg].first = nullptr;
- VRegToSize[Reg] = Size;
+ getVRegToSize()[Reg] = Size;
RegAllocHints.grow(Reg);
if (TheDelegate)
TheDelegate->MRI_NoteNewVirtualRegister(Reg);
return Reg;
}
-#endif // LLVM_BUILD_GLOBAL_ISEL
/// clearVirtRegs - Remove all virtual registers (after physreg assignment).
void MachineRegisterInfo::clearVirtRegs() {