[patch] for another problem in PR 29921

[Diego Novillo]

Zdenek Dvorak wrote on 11/23/06 05:41:

> 	PR tree-optimization/29921
> 	* tree-ssa-ccp.c (canonicalize_float_value): New function.
> 	(set_lattice_value): Use canonicalize_float_value.
> 
> 	* gcc.dg/pr29921-2.c: New test.
> 
OK.