diff options
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 9b7d248..fa873e9 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -3005,14 +3005,21 @@ vect_is_simple_reduction (loop_vec_info loop_info, stmt_vec_info phi_info, for (i = path.length () - 1; i >= 1; --i) { gimple *stmt = USE_STMT (path[i].second); - if (gimple_assign_rhs_code (stmt) != code + stmt_vec_info stmt_info = loop_info->lookup_stmt (stmt); + STMT_VINFO_REDUC_IDX (stmt_info) + = path[i].second->use - gimple_assign_rhs1_ptr (stmt); + enum tree_code stmt_code = gimple_assign_rhs_code (stmt); + bool leading_conversion = (CONVERT_EXPR_CODE_P (stmt_code) + && (i == 1 || i == path.length () - 1)); + if ((stmt_code != code && !leading_conversion) /* We can only handle the final value in epilogue generation for reduction chains. */ || (i != 1 && !has_single_use (gimple_assign_lhs (stmt)))) is_slp_reduc = false; - stmt_vec_info stmt_info = loop_info->lookup_stmt (stmt); - STMT_VINFO_REDUC_IDX (stmt_info) - = path[i].second->use - gimple_assign_rhs1_ptr (stmt); + /* For reduction chains we support a trailing/leading + conversions. We do not store those in the actual chain. */ + if (leading_conversion) + continue; reduc_chain.safe_push (stmt_info); } if (is_slp_reduc && reduc_chain.length () > 1) |