Tell the register allocator about new unused virtual registers.
This allows the allocator to free any resources used by the virtual register,
including physical register assignments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127560 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp
index 75aeac4..c9985cd 100644
--- a/lib/CodeGen/LiveRangeEdit.cpp
+++ b/lib/CodeGen/LiveRangeEdit.cpp
@@ -131,6 +131,11 @@
return lis.InsertMachineInstrInMaps(--MI).getDefIndex();
}
+void LiveRangeEdit::eraseVirtReg(unsigned Reg, LiveIntervals &LIS) {
+ if (delegate_ && delegate_->LRE_CanEraseVirtReg(Reg))
+ LIS.removeInterval(Reg);
+}
+
void LiveRangeEdit::eliminateDeadDefs(SmallVectorImpl<MachineInstr*> &Dead,
LiveIntervals &LIS,
const TargetInstrInfo &TII) {