diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/RegisterClassInfo.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/RegisterClassInfo.cpp b/llvm/lib/CodeGen/RegisterClassInfo.cpp index 3d6687ef7b8..530e0cccf1d 100644 --- a/llvm/lib/CodeGen/RegisterClassInfo.cpp +++ b/llvm/lib/CodeGen/RegisterClassInfo.cpp @@ -90,6 +90,7 @@ void RegisterClassInfo::runOnMachineFunction(const MachineFunction &mf) { void RegisterClassInfo::compute(const TargetRegisterClass *RC) const { assert(RC && "no register class given"); RCInfo &RCI = RegClass[RC->getID()]; + auto &STI = MF->getSubtarget(); // Raw register count, including all reserved regs. unsigned NumRegs = RC->getNumRegs(); @@ -114,7 +115,8 @@ void RegisterClassInfo::compute(const TargetRegisterClass *RC) const { unsigned Cost = TRI->getCostPerUse(PhysReg); MinCost = std::min(MinCost, Cost); - if (CalleeSavedAliases[PhysReg]) + if (CalleeSavedAliases[PhysReg] && + !STI.ignoreCSRForAllocationOrder(*MF, PhysReg)) // PhysReg aliases a CSR, save it for later. CSRAlias.push_back(PhysReg); else { |
