Infinite loop in compiling javax/swing/text/html/parser/HTML_401F.list

[Eric Botcazou]

> I never noticed that this part was so long and I was too eager to do
> something else with the CPU. Sorry for the noise.

Don't be sorry, I can reproduce a compilation time surge for libjava on my 
machine (AMD64, 2.4 GHz, 1 GB).  In particular, HTML_401F.o now takes 40 min 
to compile for each version of the library.

The surge comes from the fix for PR tree-optimization/33870 (rev 129675).  
With it, 'make all-target-libjava' takes 261 min user time.  If I revert it,
do a 'make quickstrap' and run the command again, it only takes 109 min.

-- 
Eric Botcazou