Bad choices by expand_mult_highpart

[Joseph S. Myers]

On Sun, 21 Mar 2004, Hans-Peter Nilsson wrote:

> Nit: should be "if (i / 10 != 0) abort ();"
> No, I don't remember if the abort-on-error rule for test-cases
> is documented.  I would've moved "i" to top-level; local
> volatile variables confuse me.

Documented in sourcebuild.texi, "Test Idioms".  (Also in
testsuite/README.gcc, one of the various miscellaneous text files sitting
around not integrated with the rest of the documentation.)

-- 
Joseph S. Myers
jsm@polyomino.org.uk