[PATCH] tree-optimization/99807 - avoid bogus assert with permute SLP node

[Richard Biener]

This avoids asserting anything on the SLP_TREE_REPRESENTATIVE of
an SLP permute node (which shouldn't be there).

Bootstrapped / tested on x86_64-unknown-linux-gnu, pushed.

2021-03-29  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/99807
	* tree-vect-slp.c (vect_slp_analyze_node_operations_1): Move
	assert below VEC_PERM handling.

	* gfortran.dg/vect/pr99807.f90: New testcase.
---
 gcc/testsuite/gfortran.dg/vect/pr99807.f90 | 11 +++++++++++
 gcc/tree-vect-slp.c                        |  2 +-
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gfortran.dg/vect/pr99807.f90

diff --git a/gcc/testsuite/gfortran.dg/vect/pr99807.f90 b/gcc/testsuite/gfortran.dg/vect/pr99807.f90
new file mode 100644
index 00000000000..4ab46a32515
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/vect/pr99807.f90
@@ -0,0 +1,11 @@
+! { dg-do compile }
+! { dg-additional-options "-march=armv8.3-a" { target aarch64-*-* } }
+
+subroutine cppco(ap, z)
+  implicit none
+  complex :: ap(*), z(*)
+
+  z(1) = z(1) + z(2) * (ap(1))
+
+  return
+end subroutine cppco
diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c
index f1a2b5d60fa..ceec7f5c410 100644
--- a/gcc/tree-vect-slp.c
+++ b/gcc/tree-vect-slp.c
@@ -3724,7 +3724,6 @@ vect_slp_analyze_node_operations_1 (vec_info *vinfo, slp_tree node,
 				    stmt_vector_for_cost *cost_vec)
 {
   stmt_vec_info stmt_info = SLP_TREE_REPRESENTATIVE (node);
-  gcc_assert (STMT_SLP_TYPE (stmt_info) != loop_vect);
 
   /* Calculate the number of vector statements to be created for the
      scalar stmts in this node.  For SLP reductions it is equal to the
@@ -3760,6 +3759,7 @@ vect_slp_analyze_node_operations_1 (vec_info *vinfo, slp_tree node,
   if (SLP_TREE_CODE (node) == VEC_PERM_EXPR)
     return vectorizable_slp_permutation (vinfo, NULL, node, cost_vec);
 
+  gcc_assert (STMT_SLP_TYPE (stmt_info) != loop_vect);
   if (is_a <bb_vec_info> (vinfo)
       && !vect_update_shared_vectype (stmt_info, SLP_TREE_VECTYPE (node)))
     {
-- 
2.26.2