tree-optimization/109219 - avoid looking at STMT_SLP_TYPE
The following avoids looking at STMT_SLP_TYPE apart from the only
place needing it - transform and analysis of non-SLP loop stmts.
In particular it doesn't have a reliable meaning on SLP representatives
which are also passed as stmt_vinfo to vectorizable_* routines. The
proper way to check in those is to look for the slp_node argument
instead.
PR tree-optimization/109219
* tree-vect-loop.cc (vectorizable_reduction): Check
slp_node, not STMT_SLP_TYPE.
* tree-vect-stmts.cc (vectorizable_condition): Likewise.
* tree-vect-slp.cc (vect_slp_analyze_node_operations_1):
Remove assertion on STMT_SLP_TYPE.