re PR tree-optimization/46663 (ICE: SIGSEGV in vect_recog_pow_pattern...

re PR tree-optimization/46663 (ICE: SIGSEGV in vect_recog_pow_pattern (gimple.h:2055) with -O -fexceptions -ftree-vectorize)


	PR tree-optimization/46663
	* tree-vect-patterns.c (vect_recog_pow_pattern): Check that
	FUNCTION_DECL exists and that it's a builtin.


Co-Authored-By: Ira Rosen <irar@il.ibm.com>

From-SVN: r167366