diff options
| -rw-r--r-- | lib/Transforms/Scalar/GVN.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp index 3662424923..6e532630c7 100644 --- a/lib/Transforms/Scalar/GVN.cpp +++ b/lib/Transforms/Scalar/GVN.cpp @@ -956,6 +956,11 @@ bool GVN::processNonLocalLoad(LoadInst *LI, // it will be too expensive. if (Deps.size() > 100) return false; + + // If we had a phi translation failure, we'll have a single entry which is a + // clobber in the current block. Reject this early. + if (Deps.size() == 1 && Deps[0].second.isClobber()) + return false; // Filter out useless results (non-locals, etc). Keep track of the blocks // where we have a value available in repl, also keep track of whether we see |