Fix a couple of places where changes are made but not tracked.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129287 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp
index 07a7d27..f97ccf6 100644
--- a/lib/CodeGen/MachineCSE.cpp
+++ b/lib/CodeGen/MachineCSE.cpp
@@ -365,6 +365,8 @@
if (!FoundCSE) {
// Look for trivial copy coalescing opportunities.
if (PerformTrivialCoalescing(MI, MBB)) {
+ Changed = true;
+
// After coalescing MI itself may become a copy.
if (MI->isCopyLike())
continue;
@@ -379,10 +381,11 @@
if (NewMI) {
Commuted = true;
FoundCSE = VNT.count(NewMI);
- if (NewMI != MI)
+ if (NewMI != MI) {
// New instruction. It doesn't need to be kept.
NewMI->eraseFromParent();
- else if (!FoundCSE)
+ Changed = true;
+ } else if (!FoundCSE)
// MI was changed but it didn't help, commute it back!
(void)TII->commuteInstruction(MI);
}
@@ -450,6 +453,7 @@
++NumPhysCSEs;
if (Commuted)
++NumCommutes;
+ Changed = true;
} else {
DEBUG(dbgs() << "*** Not profitable, avoid CSE!\n");
VNT.insert(MI, CurrVN++);