tree-optimization/97085 - fold some trivial bool vector ?:

tree-optimization/97085 - fold some trivial bool vector ?:

The following aovids the ICE in the testcase by doing some additional
simplification of VEC_COND_EXPRs for VECTOR_BOOLEAN_TYPE_P which
we don't really expect, esp. when they are not classical vectors,
thus AVX512 or SVE masks.

2020-09-24  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/97085
	* match.pd (mask ? { false,..} : { true, ..} -> ~mask): New.

	* gcc.dg/vect/pr97085.c: New testcase.