diff options
Diffstat (limited to 'lib/CodeGen/VirtRegMap.cpp')
-rw-r--r-- | lib/CodeGen/VirtRegMap.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp index cf674575ba..dcfad66414 100644 --- a/lib/CodeGen/VirtRegMap.cpp +++ b/lib/CodeGen/VirtRegMap.cpp @@ -88,6 +88,15 @@ unsigned VirtRegMap::getRegAllocPref(unsigned virtReg) { return TRI->ResolveRegAllocHint(Hint.first, physReg, *MF); } +bool VirtRegMap::hasKnownPreference(unsigned VirtReg) { + std::pair<unsigned, unsigned> Hint = MRI->getRegAllocationHint(VirtReg); + if (TargetRegisterInfo::isPhysicalRegister(Hint.second)) + return true; + if (TargetRegisterInfo::isVirtualRegister(Hint.second)) + return hasPhys(Hint.second); + return false; +} + int VirtRegMap::assignVirt2StackSlot(unsigned virtReg) { assert(TargetRegisterInfo::isVirtualRegister(virtReg)); assert(Virt2StackSlotMap[virtReg] == NO_STACK_SLOT && |