Minimize the slot indexes spanned by register ranges created when splitting.
When an interfering live range ends at a dead slot index between two
instructions, make sure that the inserted copy instruction gets a slot index
after the dead ones. This makes it possible to avoid the interference.
Ideally, there shouldn't be interference ending at a deleted instruction, but
physical register coalescing can sometimes do that to sub-registers.
This fixes PR9823.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130687 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp
index 443cc2e..f8a3dbb 100644
--- a/lib/CodeGen/LiveRangeEdit.cpp
+++ b/lib/CodeGen/LiveRangeEdit.cpp
@@ -140,11 +140,13 @@
const Remat &RM,
LiveIntervals &lis,
const TargetInstrInfo &tii,
- const TargetRegisterInfo &tri) {
+ const TargetRegisterInfo &tri,
+ bool Late) {
assert(RM.OrigMI && "Invalid remat");
tii.reMaterialize(MBB, MI, DestReg, 0, RM.OrigMI, tri);
rematted_.insert(RM.ParentVNI);
- return lis.InsertMachineInstrInMaps(--MI).getDefIndex();
+ return lis.getSlotIndexes()->insertMachineInstrInMaps(--MI, Late)
+ .getDefIndex();
}
void LiveRangeEdit::eraseVirtReg(unsigned Reg, LiveIntervals &LIS) {