Instead of clearing the rewriter, don't attempt to rewrite dead phi nodes.
Also fix 80 column violation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72371 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/IndVarSimplify.cpp b/lib/Transforms/Scalar/IndVarSimplify.cpp
index 07c7d00..f0f2d83 100644
--- a/lib/Transforms/Scalar/IndVarSimplify.cpp
+++ b/lib/Transforms/Scalar/IndVarSimplify.cpp
@@ -250,7 +250,8 @@
// Iterate over all of the PHI nodes.
BasicBlock::iterator BBI = ExitBB->begin();
while ((PN = dyn_cast<PHINode>(BBI++))) {
-
+ if (PN->use_empty())
+ continue; // dead use, don't replace it
// Iterate over all of the values in all the PHI nodes.
for (unsigned i = 0; i != NumPreds; ++i) {
// If the value being merged in is not integer or is not defined
@@ -303,7 +304,6 @@
// in the loop, so we don't need an LCSSA phi node anymore.
if (NumPreds == 1) {
PN->replaceAllUsesWith(ExitVal);
- Rewriter.clear();
RecursivelyDeleteTriviallyDeadInstructions(PN);
break;
}