From 24e49ea0b11e0ccfb2c18b7d79c5cb46f36f8db8 Mon Sep 17 00:00:00 2001 From: Jan Hubicka Date: Fri, 13 Jun 2014 00:23:55 +0200 Subject: symtab.c (symtab_node::reset_section): New method. * symtab.c (symtab_node::reset_section): New method. * cgraph.c (cgraph_node_cannot_be_local_p_1): Accept non-local for localization. * cgraph.h (reset_section): Declare. * ipa-inline-analysis.c (do_estimate_growth): Check for comdat groups; do not consider comdat locals. * cgraphclones.c (set_new_clone_decl_and_node_flags): Get section for new symbol. * ipa-visiblity.c (cgraph_externally_visible_p): Cleanup. (update_visibility_by_resolution_info): Consider UNDEF; fix checking; reset sections of symbols dragged out of the comdats. (function_and_variable_visibility): Reset sections of localized symbols. From-SVN: r211600 --- gcc/ChangeLog | 15 +++++++++++++++ gcc/cgraph.c | 7 ++++--- gcc/cgraph.h | 1 + gcc/cgraphclones.c | 1 + gcc/ipa-inline-analysis.c | 4 ++-- gcc/ipa-visibility.c | 33 +++++++++++++++++++-------------- gcc/symtab.c | 15 +++++++++++++++ 7 files changed, 57 insertions(+), 19 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a8dcd62..f3deff3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,20 @@ 2014-06-12 Jan Hubicka + * symtab.c (symtab_node::reset_section): New method. + * cgraph.c (cgraph_node_cannot_be_local_p_1): Accept non-local + for localization. + * cgraph.h (reset_section): Declare. + * ipa-inline-analysis.c (do_estimate_growth): Check for comdat groups; + do not consider comdat locals. + * cgraphclones.c (set_new_clone_decl_and_node_flags): Get section + for new symbol. + * ipa-visiblity.c (cgraph_externally_visible_p): Cleanup. + (update_visibility_by_resolution_info): Consider UNDEF; fix checking; + reset sections of symbols dragged out of the comdats. + (function_and_variable_visibility): Reset sections of localized symbols. + +2014-06-12 Jan Hubicka + * tree-vect-data-refs.c (vect_can_force_dr_alignment_p): Reorg to use symtab and decl_binds_to_current_def_p * tree-vectorizer.c (increase_alignment): Increase alignment diff --git a/gcc/cgraph.c b/gcc/cgraph.c index 610bf67..f535740 100644 --- a/gcc/cgraph.c +++ b/gcc/cgraph.c @@ -2169,6 +2169,7 @@ cgraph_node_cannot_be_local_p_1 (struct cgraph_node *node, && !node->forced_by_abi && !symtab_used_from_object_file_p (node) && !node->same_comdat_group) + || DECL_EXTERNAL (node->decl) || !node->externally_visible)); } @@ -2259,14 +2260,14 @@ cgraph_make_node_local_1 (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED) { symtab_make_decl_local (node->decl); - node->set_section (NULL); node->set_comdat_group (NULL); node->externally_visible = false; node->forced_by_abi = false; node->local.local = true; - node->set_section (NULL); + node->reset_section (); node->unique_name = (node->resolution == LDPR_PREVAILING_DEF_IRONLY - || node->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP); + || node->unique_name + || node->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP); node->resolution = LDPR_PREVAILING_DEF_IRONLY; gcc_assert (cgraph_function_body_availability (node) == AVAIL_LOCAL); } diff --git a/gcc/cgraph.h b/gcc/cgraph.h index 1a5e85e..ce99166 100644 --- a/gcc/cgraph.h +++ b/gcc/cgraph.h @@ -208,6 +208,7 @@ public: /* Set section for symbol and its aliases. */ void set_section (const char *section); void set_section_for_node (const char *section); + void reset_section (); }; enum availability diff --git a/gcc/cgraphclones.c b/gcc/cgraphclones.c index 6f83d74..94c9760 100644 --- a/gcc/cgraphclones.c +++ b/gcc/cgraphclones.c @@ -293,6 +293,7 @@ set_new_clone_decl_and_node_flags (cgraph_node *new_node) new_node->externally_visible = 0; new_node->local.local = 1; new_node->lowered = true; + new_node->reset_section (); } /* Duplicate thunk THUNK if necessary but make it to refer to NODE. diff --git a/gcc/ipa-inline-analysis.c b/gcc/ipa-inline-analysis.c index c50a722..7f9febc 100644 --- a/gcc/ipa-inline-analysis.c +++ b/gcc/ipa-inline-analysis.c @@ -3877,7 +3877,7 @@ do_estimate_growth (struct cgraph_node *node) /* COMDAT functions are very often not shared across multiple units since they come from various template instantiations. Take this into account. */ - else if (DECL_COMDAT (node->decl) + else if (node->externally_visible && node->get_comdat_group () && cgraph_can_remove_if_no_direct_calls_p (node)) d.growth -= (info->size * (100 - PARAM_VALUE (PARAM_COMDAT_SHARING_PROBABILITY)) @@ -3928,7 +3928,7 @@ growth_likely_positive (struct cgraph_node *node, int edge_growth ATTRIBUTE_UNUS && (ret = node_growth_cache[node->uid])) return ret > 0; if (!cgraph_will_be_removed_from_program_if_no_direct_calls (node) - && (!DECL_COMDAT (node->decl) + && (!node->externally_visible || !node->get_comdat_group () || !cgraph_can_remove_if_no_direct_calls_p (node))) return true; max_callers = inline_summary (node)->size * 4 / edge_growth + 2; diff --git a/gcc/ipa-visibility.c b/gcc/ipa-visibility.c index 4e0fd9e..97f9a00 100644 --- a/gcc/ipa-visibility.c +++ b/gcc/ipa-visibility.c @@ -236,7 +236,7 @@ cgraph_externally_visible_p (struct cgraph_node *node, return true; if (node->resolution == LDPR_PREVAILING_DEF_IRONLY) return false; - /* When doing LTO or whole program, we can bring COMDAT functoins static. + /* When doing LTO or whole program, we can bring COMDAT functions static. This improves code quality and we know we will duplicate them at most twice (in the case that we are not using plugin and link with object file implementing same COMDAT) */ @@ -295,8 +295,6 @@ varpool_externally_visible_p (varpool_node *vnode) Even if the linker clams the symbol is unused, never bring internal symbols that are declared by user as used or externally visible. This is needed for i.e. references from asm statements. */ - if (symtab_used_from_object_file_p (vnode)) - return true; if (vnode->resolution == LDPR_PREVAILING_DEF_IRONLY) return false; @@ -386,7 +384,8 @@ update_visibility_by_resolution_info (symtab_node * node) if (!node->externally_visible || (!DECL_WEAK (node->decl) && !DECL_ONE_ONLY (node->decl)) - || node->resolution == LDPR_UNKNOWN) + || node->resolution == LDPR_UNKNOWN + || node->resolution == LDPR_UNDEF) return; define = (node->resolution == LDPR_PREVAILING_DEF_IRONLY @@ -397,7 +396,7 @@ update_visibility_by_resolution_info (symtab_node * node) if (node->same_comdat_group) for (symtab_node *next = node->same_comdat_group; next != node; next = next->same_comdat_group) - gcc_assert (!node->externally_visible + gcc_assert (!next->externally_visible || define == (next->resolution == LDPR_PREVAILING_DEF_IRONLY || next->resolution == LDPR_PREVAILING_DEF || next->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP)); @@ -411,11 +410,15 @@ update_visibility_by_resolution_info (symtab_node * node) if (next->externally_visible && !define) DECL_EXTERNAL (next->decl) = true; + if (!next->alias) + next->reset_section (); } node->set_comdat_group (NULL); DECL_WEAK (node->decl) = false; if (!define) DECL_EXTERNAL (node->decl) = true; + if (!node->alias) + node->reset_section (); symtab_dissolve_same_comdat_group_list (node); } @@ -476,7 +479,7 @@ function_and_variable_visibility (bool whole_program) symtab_dissolve_same_comdat_group_list (node); } gcc_assert ((!DECL_WEAK (node->decl) - && !DECL_COMDAT (node->decl)) + && !DECL_COMDAT (node->decl)) || TREE_PUBLIC (node->decl) || node->weakref || DECL_EXTERNAL (node->decl)); @@ -494,6 +497,7 @@ function_and_variable_visibility (bool whole_program) && node->definition && !node->weakref && !DECL_EXTERNAL (node->decl)) { + bool reset = TREE_PUBLIC (node->decl); gcc_assert (whole_program || in_lto_p || !TREE_PUBLIC (node->decl)); node->unique_name = ((node->resolution == LDPR_PREVAILING_DEF_IRONLY @@ -512,9 +516,9 @@ function_and_variable_visibility (bool whole_program) next = next->same_comdat_group) { next->set_comdat_group (NULL); - if (!next->alias) - next->set_section (NULL); symtab_make_decl_local (next->decl); + if (!node->alias) + node->reset_section (); next->unique_name = ((next->resolution == LDPR_PREVAILING_DEF_IRONLY || next->unique_name || next->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP) @@ -528,9 +532,9 @@ function_and_variable_visibility (bool whole_program) } if (TREE_PUBLIC (node->decl)) node->set_comdat_group (NULL); - if (DECL_COMDAT (node->decl) && !node->alias) - node->set_section (NULL); symtab_make_decl_local (node->decl); + if (reset && !node->alias) + node->reset_section (); } if (node->thunk.thunk_p @@ -632,6 +636,7 @@ function_and_variable_visibility (bool whole_program) if (!vnode->externally_visible && !vnode->weakref) { + bool reset = TREE_PUBLIC (vnode->decl); gcc_assert (in_lto_p || whole_program || !TREE_PUBLIC (vnode->decl)); vnode->unique_name = ((vnode->resolution == LDPR_PREVAILING_DEF_IRONLY || vnode->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP) @@ -647,9 +652,9 @@ function_and_variable_visibility (bool whole_program) next = next->same_comdat_group) { next->set_comdat_group (NULL); - if (!next->alias) - next->set_section (NULL); symtab_make_decl_local (next->decl); + if (!next->alias) + next->reset_section (); next->unique_name = ((next->resolution == LDPR_PREVAILING_DEF_IRONLY || next->unique_name || next->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP) @@ -659,9 +664,9 @@ function_and_variable_visibility (bool whole_program) } if (TREE_PUBLIC (vnode->decl)) vnode->set_comdat_group (NULL); - if (DECL_COMDAT (vnode->decl) && !vnode->alias) - vnode->set_section (NULL); symtab_make_decl_local (vnode->decl); + if (reset && !vnode->alias) + vnode->reset_section (); vnode->resolution = LDPR_PREVAILING_DEF_IRONLY; } update_visibility_by_resolution_info (vnode); diff --git a/gcc/symtab.c b/gcc/symtab.c index 8158acc..b68a16f 100644 --- a/gcc/symtab.c +++ b/gcc/symtab.c @@ -1176,6 +1176,21 @@ symtab_node::set_section (const char *section) symtab_for_node_and_aliases (this, set_section_1, const_cast(section), true); } +/* Reset section of NODE. That is when NODE is being brought local + we may want to clear section produced for comdat group and depending + on function-sections produce now, local, unique section for it. */ + +void +symtab_node::reset_section () +{ + if (!this->implicit_section) + return; + this->set_section (NULL); + resolve_unique_section (this->decl, 0, + is_a (this) + ? flag_function_sections : flag_data_sections); +} + /* Worker for symtab_resolve_alias. */ static bool -- cgit v1.1