C identifier lookup speedups, 1/2

[David Edelsohn]

>>>>> Zack Weinberg writes:

Zack> Yes.  It is supposed to be XFAILed.  Please find out why
Zack> builtin-noret-2.x isn't doing its job.

	It is XFAILED, but XFAIL applies to a FAIL.  Because of the link
error, the case is UNRESOLVED.  XFAIL try to build and execute it, but
expect FAIL.  If you only want the testcase built for -O0, you need to use
gcc.dg.

David