[PATCH] merge consecutive stores of extracted vector elements (PR21711)

[hfinkel at anl.gov]

================
Comment at: lib/CodeGen/SelectionDAG/DAGCombiner.cpp:9791
@@ +9790,3 @@
+      // (in other words some of the stored values are constants or loads).
+      if (StoredVal.getOpcode() != ISD::EXTRACT_VECTOR_ELT)
+        return false;
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How does this cause a crash if you remove this check?

http://reviews.llvm.org/D6850

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