1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 1d82c7b8f54..30908c8ebf3 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -909,6 +909,11 @@ struct LoopVectorize : public LoopPass {
     DT = &getAnalysis<DominatorTree>();
     TLI = getAnalysisIfAvailable<TargetLibraryInfo>();
 
+    // If the target claims to have no vector registers don't attempt
+    // vectorization.
+    if (!TTI->getNumberOfRegisters(true))
+      return false;
+
     if (DL == NULL) {
       DEBUG(dbgs() << "LV: Not vectorizing because of missing data layout");
       return false;