Add a statistic to PHIElimination tracking the number of critical edges split.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125476 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp
index b940e26..f59e4f1 100644
--- a/lib/CodeGen/PHIElimination.cpp
+++ b/lib/CodeGen/PHIElimination.cpp
@@ -83,6 +83,7 @@
}
STATISTIC(NumAtomic, "Number of atomic phis lowered");
+STATISTIC(NumCriticalEdgesSplit, "Number of critical edges split");
STATISTIC(NumReused, "Number of reused lowered phis");
char PHIElimination::ID = 0;
@@ -413,8 +414,12 @@
!LV.isLiveIn(Reg, MBB) && LV.isLiveOut(Reg, *PreMBB)) {
if (!MLI ||
!(MLI->getLoopFor(PreMBB) == MLI->getLoopFor(&MBB) &&
- MLI->isLoopHeader(&MBB)))
- Changed |= PreMBB->SplitCriticalEdge(&MBB, this) != 0;
+ MLI->isLoopHeader(&MBB))) {
+ if (PreMBB->SplitCriticalEdge(&MBB, this)) {
+ Changed = true;
+ ++NumCriticalEdgesSplit;
+ }
+ }
}
}
}