Transfer physical register spill info when load / store folding happens.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48246 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/VirtRegMap.h b/lib/CodeGen/VirtRegMap.h
index 7ebf31e..63d5b87 100644
--- a/lib/CodeGen/VirtRegMap.h
+++ b/lib/CodeGen/VirtRegMap.h
@@ -268,6 +268,8 @@
}
}
+ /// @brief - transfer spill point information from one instruction to
+ /// another.
void transferSpillPts(MachineInstr *Old, MachineInstr *New) {
std::map<MachineInstr*,std::vector<std::pair<unsigned,bool> > >::iterator
I = SpillPt2VirtMap.find(Old);
@@ -343,6 +345,21 @@
return EmergencySpillMap[MI];
}
+ /// @brief - transfer emergency spill information from one instruction to
+ /// another.
+ void transferEmergencySpills(MachineInstr *Old, MachineInstr *New) {
+ std::map<MachineInstr*,std::vector<unsigned> >::iterator I =
+ EmergencySpillMap.find(Old);
+ if (I == EmergencySpillMap.end())
+ return;
+ while (!I->second.empty()) {
+ unsigned virtReg = I->second.back();
+ I->second.pop_back();
+ addEmergencySpill(virtReg, New);
+ }
+ EmergencySpillMap.erase(I);
+ }
+
/// @brief return or get a emergency spill slot for the register class.
int getEmergencySpillSlot(const TargetRegisterClass *RC);