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.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
* tree-vect-slp.cc (vect_build_slp_tree_1): Do not
ask for internal_fn_p (CFN_LAST).
---
gcc/tree-vect-slp.cc | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/gcc/tree-vect-slp.cc b/gcc/tree-vect-slp.cc
index 4dd899404d9..08e8418b33e 100644
--- 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)
--
2.35.3
