[patch] for PR 17906

[Diego Novillo]

On Sat, 2004-10-09 at 14:43, Zdenek Dvorak wrote:

> 	PR tree-optimize/17906
> 	* tree-tailcall.c (tree_optimize_tail_calls_1): Do not attempt to
> 	copy non-gimple reg arguments.
> 
OK.  But please add a test case.


Diego.