Fix a couple of loops that were processing unused value numbers.
Unused VNInfos should be left alone. Their def SlotIndex doesn't point
to anything.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161257 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index 98ed2cf..4a2b7ec 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -652,7 +652,7 @@
// Adjust RegAssign if a register assignment is killed at VNI->def. We
// want to avoid calculating the live range of the source register if
// possible.
- AssignI.find(VNI->def.getPrevSlot());
+ AssignI.find(Def.getPrevSlot());
if (!AssignI.valid() || AssignI.start() >= Def)
continue;
// If MI doesn't kill the assigned register, just leave it.
@@ -739,6 +739,8 @@
for (LiveInterval::vni_iterator VI = LI->vni_begin(), VE = LI->vni_end();
VI != VE; ++VI) {
VNInfo *VNI = *VI;
+ if (VNI->isUnused())
+ continue;
VNInfo *ParentVNI = Edit->getParent().getVNInfoAt(VNI->def);
assert(ParentVNI && "Parent not live at complement def");
@@ -812,6 +814,8 @@
for (LiveInterval::vni_iterator VI = LI->vni_begin(), VE = LI->vni_end();
VI != VE; ++VI) {
VNInfo *VNI = *VI;
+ if (VNI->isUnused())
+ continue;
VNInfo *ParentVNI = Edit->getParent().getVNInfoAt(VNI->def);
const DomPair &Dom = NearestDom[ParentVNI->id];
if (!Dom.first || Dom.second == VNI->def)