[Bug tree-optimization/58483] missing optimization opportunity for const std::vector compared to std::array

[dl.soluz at gmx dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58483

--- Comment #5 from dennis luehring <dl.soluz at gmx dot net> ---
but clang 3.3 produces only the optimized output when using -O2 (-O3 still
invokes the loop optimizer too early - but this is a known bug)

so it seems that the llvm/clang developers think that new/delete can be removed
the same way as malloc/free