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-rw-r--r--lib/Transforms/Scalar/CorrelatedValuePropagation.cpp6
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/CorrelatedValuePropagation.cpp b/lib/Transforms/Scalar/CorrelatedValuePropagation.cpp
index ffe4991..3fd72a4 100644
--- a/lib/Transforms/Scalar/CorrelatedValuePropagation.cpp
+++ b/lib/Transforms/Scalar/CorrelatedValuePropagation.cpp
@@ -28,6 +28,7 @@ STATISTIC(NumPhis, "Number of phis propagated");
STATISTIC(NumSelects, "Number of selects propagated");
STATISTIC(NumMemAccess, "Number of memory access targets propagated");
STATISTIC(NumCmps, "Number of comparisons propagated");
+STATISTIC(NumDeadCases, "Number of switch cases removed");
namespace {
class CorrelatedValuePropagation : public FunctionPass {
@@ -111,7 +112,8 @@ bool CorrelatedValuePropagation::processPHI(PHINode *P) {
Changed = true;
}
- ++NumPhis;
+ if (Changed)
+ ++NumPhis;
return Changed;
}
@@ -233,12 +235,14 @@ bool CorrelatedValuePropagation::processSwitch(SwitchInst *SI) {
// This case never fires - remove it.
CI.getCaseSuccessor()->removePredecessor(BB);
SI->removeCase(CI); // Does not invalidate the iterator.
+ ++NumDeadCases;
Changed = true;
} else if (State == LazyValueInfo::True) {
// This case always fires. Arrange for the switch to be turned into an
// unconditional branch by replacing the switch condition with the case
// value.
SI->setCondition(Case);
+ NumDeadCases += SI->getNumCases();
Changed = true;
break;
}