[cfe-commits] [Patch] When inside template instantiations, prevent warnings on constant operands of logical operators.

[Richard Trieu]

Remove warnings of constant operands of logical operators from template
instantiations.  Upon instantiation of template, value-dependent parameters
are replaced by equivalent literals, so code like:

template<unsigned int A, unsigned int B> struct S {
  int foo() {
    int x = A && B;
  }
}

will not warn on A && B on every instantiation.  This will still warn on
other cases inside templates, which will be caught on checking the template
definition.

Patch attached and available at http://codereview.appspot.com/4650076/
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