/* Chains of recurrences.
- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Contributed by Sebastian Pop <pop@cri.ensmp.fr>
static inline bool
evolution_function_is_affine_p (const_tree chrec)
{
- if (chrec == NULL_TREE)
- return false;
-
- switch (TREE_CODE (chrec))
- {
- case POLYNOMIAL_CHREC:
- if (evolution_function_is_invariant_p (CHREC_LEFT (chrec),
- CHREC_VARIABLE (chrec))
- && evolution_function_is_invariant_p (CHREC_RIGHT (chrec),
- CHREC_VARIABLE (chrec)))
- return true;
- else
- return false;
-
- default:
- return false;
- }
+ return chrec
+ && TREE_CODE (chrec) == POLYNOMIAL_CHREC
+ && evolution_function_is_invariant_p (CHREC_RIGHT (chrec),
+ CHREC_VARIABLE (chrec));
}
/* Determines whether EXPR does not contains chrec expressions. */