Terminate all dead defs at the dead slot instead of the 'next' slot.
This makes no difference for normal defs, but early clobber dead defs
now look like:
[Slot_EarlyClobber; Slot_Dead)
instead of:
[Slot_EarlyClobber; Slot_Register).
Live ranges for normal dead defs look like:
[Slot_Register; Slot_Dead)
as before.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144512 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index 61454ed..6c46d53 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -366,14 +366,14 @@
// If the previous value was a simple mapping, add liveness for it now.
if (VNInfo *OldVNI = InsP.first->second.getPointer()) {
SlotIndex Def = OldVNI->def;
- LI->addRange(LiveRange(Def, Def.getNextSlot(), OldVNI));
+ LI->addRange(LiveRange(Def, Def.getDeadSlot(), OldVNI));
// No longer a simple mapping. Switch to a complex, non-forced mapping.
InsP.first->second = ValueForcePair();
}
// This is a complex mapping, add liveness for VNI
SlotIndex Def = VNI->def;
- LI->addRange(LiveRange(Def, Def.getNextSlot(), VNI));
+ LI->addRange(LiveRange(Def, Def.getDeadSlot(), VNI));
return VNI;
}
@@ -393,7 +393,7 @@
// This was previously a single mapping. Make sure the old def is represented
// by a trivial live range.
SlotIndex Def = VNI->def;
- Edit->get(RegIdx)->addRange(LiveRange(Def, Def.getNextSlot(), VNI));
+ Edit->get(RegIdx)->addRange(LiveRange(Def, Def.getDeadSlot(), VNI));
// Mark as complex mapped, forced.
VFP = ValueForcePair(0, true);
}
@@ -994,8 +994,8 @@
LiveInterval *LI = *I;
for (LiveInterval::const_iterator LII = LI->begin(), LIE = LI->end();
LII != LIE; ++LII) {
- // Dead defs end at the store slot.
- if (LII->end != LII->valno->def.getNextSlot())
+ // Dead defs end at the dead slot.
+ if (LII->end != LII->valno->def.getDeadSlot())
continue;
MachineInstr *MI = LIS.getInstructionFromIndex(LII->valno->def);
assert(MI && "Missing instruction for dead def");