Fix SIMD call SLP discovery

When we do SLP discovery of SIMD calls we run into the issue that
when the call is neither builtin nor internal function we have
cfn == CFN_LAST but internal_fn_p of that returns true.  Since
IFN_LAST isn't vectorizable we fail spuriously.

Fixed by checking for cfn != CFN_LAST && internal_fn_p (cfn)
instead.

	* tree-vect-slp.cc (vect_build_slp_tree_1): Do not
	ask for internal_fn_p (CFN_LAST).

diff --git a/gcc/tree-vect-slp.cc b/gcc/tree-vect-slp.cc
index a3e54ebf62a29d2ff1c35546a742763c84f2d8b5..fa098f9ff4eaebfaa2083124df11c435519573aa 100644 (file)
--- a/gcc/tree-vect-slp.cc
+++ b/gcc/tree-vect-slp.cc
@@ -1084,7 +1084,8 @@ vect_build_slp_tree_1 (vec_info *vinfo, unsigned char *swap,
              ldst_p = true;
              rhs_code = CFN_MASK_STORE;
            }
-         else if ((internal_fn_p (cfn)
+         else if ((cfn != CFN_LAST
+                   && internal_fn_p (cfn)
                    && !vectorizable_internal_fn_p (as_internal_fn (cfn)))
                   || gimple_call_tail_p (call_stmt)
                   || gimple_call_noreturn_p (call_stmt)