diff options
Diffstat (limited to 'gcc/cgraphunit.c')
| -rw-r--r-- | gcc/cgraphunit.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/gcc/cgraphunit.c b/gcc/cgraphunit.c index 256850224db..ddaecd3aa1c 100644 --- a/gcc/cgraphunit.c +++ b/gcc/cgraphunit.c @@ -172,6 +172,7 @@ static void cgraph_mark_functions_to_output (void); static void cgraph_expand_function (struct cgraph_node *); static tree record_reference (tree *, int *, void *); static void cgraph_output_pending_asms (void); +static void cgraph_increase_alignment (void); /* Records tree nodes seen in record_reference. Simply using walk_tree_without_duplicates doesn't guarantee each node is visited @@ -1506,6 +1507,7 @@ cgraph_optimize (void) /* This pass remove bodies of extern inline functions we never inlined. Do this later so other IPA passes see what is really going on. */ cgraph_remove_unreachable_nodes (false, dump_file); + cgraph_increase_alignment (); cgraph_global_info_ready = true; if (cgraph_dump_file) { @@ -1565,6 +1567,51 @@ cgraph_optimize (void) #endif } +/* Increase alignment of global arrays to improve vectorization potential. + TODO: + - Consider also structs that have an array field. + - Use ipa analysis to prune arrays that can't be vectorized? + This should involve global alignment analysis and in the future also + array padding. */ + +static void +cgraph_increase_alignment (void) +{ + if (flag_section_anchors && flag_tree_vectorize) + { + struct cgraph_varpool_node *vnode; + + /* Increase the alignment of all global arrays for vectorization. */ + for (vnode = cgraph_varpool_nodes_queue; + vnode; + vnode = vnode->next_needed) + { + tree vectype, decl = vnode->decl; + unsigned int alignment; + + if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE) + continue; + vectype = get_vectype_for_scalar_type (TREE_TYPE (TREE_TYPE (decl))); + if (!vectype) + continue; + alignment = TYPE_ALIGN (vectype); + if (DECL_ALIGN (decl) >= alignment) + continue; + + if (vect_can_force_dr_alignment_p (decl, alignment)) + { + DECL_ALIGN (decl) = TYPE_ALIGN (vectype); + DECL_USER_ALIGN (decl) = 1; + if (cgraph_dump_file) + { + fprintf (cgraph_dump_file, "Increasing alignment of decl: "); + print_generic_expr (cgraph_dump_file, decl, TDF_SLIM); + } + } + } + } +} + /* Generate and emit a static constructor or destructor. WHICH must be one of 'I' or 'D'. BODY should be a STATEMENT_LIST containing GENERIC statements. */ |