[PATCH] C++14: Disable sized deallocation by default due to ABI breakage

[Richard Smith]

I have one general concern: we used to provide sized deallocation outside of C++14 mode via `-Xclang -fiszed-deallocation`. With this patch, that no longer works, because `-fsized-deallocation` doesn't cause the sized deallocation functions to get implicitly declared any more.

Given that the implicit declarations are not really useful unless a sized deallocation function is known to be available, and that it seems overkill to have two flags for this feature, perhaps we should keep the implicit declarations and the usage thereof tied together under the same flag?


http://reviews.llvm.org/D8467

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