Skip canonicalization check in LStoreKeyedFastDoubleElement when it is not needed:

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 99f28f0b692a115487b42f02a63d7ff847eef78a..feb3fa90f033a307eff48e30acb59d046e6af3bb 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -1707,6 +1707,8 @@ class LStoreKeyedFastDoubleElement: public LTemplateInstruction<0, 3, 0> {
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
+
+  bool NeedsCanonicalization() { return hydrogen()->NeedsCanonicalization(); }
 };