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Re: RFA: PATCH to initializer_constant_valid_p for c++/38880

Ian Lance Taylor wrote: 
However, your patch does mean that
    char *p1;
    short a[] = { p1 + p1 };
may do something unexpected.

That's ill-formed; you can't add two pointers in C++.

And to then wonder why
POINTER_PLUS_EXPR wasn't used instead of PLUS_EXPR.

Because http://gcc.gnu.org/viewcvs?view=rev&revision=143442 made the compiler stop folding to POINTER_PLUS_EXPR.

Jason

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