tree-optimization/101003 - use pattern defs when linearizing
We of course have to use pattern stmt defs for the linearized
chain operands which is what I failed to ensure.
2021-06-10 Richard Biener <rguenther@suse.de>
PR tree-optimization/101003
* tree-vect-slp.c (vect_build_slp_tree_2): Appropriately
use the pattern stmt defs when linearizing a chain.
diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c
index 1915d74..c4f8f38 100644
--- a/gcc/tree-vect-slp.c
+++ b/gcc/tree-vect-slp.c
@@ -1806,6 +1806,11 @@
stmt_vec_info def_stmt_info;
bool res = vect_is_simple_use (op, vinfo, &dt, &def_stmt_info);
gcc_assert (res);
+ if (dt == vect_internal_def)
+ {
+ def_stmt_info = vect_stmt_to_vectorize (def_stmt_info);
+ op = gimple_get_lhs (def_stmt_info->stmt);
+ }
gimple *use_stmt;
use_operand_p use_p;
if (dt == vect_internal_def
