From 8cb114b9a9de2adee05ef1d91b30986f8e27d329 Mon Sep 17 00:00:00 2001 From: Jan Hubicka Date: Sat, 8 Jan 2011 17:33:57 +0100 Subject: re PR tree-optimization/46469 (ICE: verify_cgraph_node failed: inline clone is needed at -O) PR tree-optmization/46469 * ipa.c (function_and_variable_visibility): Clear needed flags on nodes with external decls; handle weakrefs merging correctly. * g++.dg/torture/pr46469.C: New testcase. From-SVN: r168598 --- gcc/ipa.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) (limited to 'gcc/ipa.c') diff --git a/gcc/ipa.c b/gcc/ipa.c index cf0a5b3..fa39f92 100644 --- a/gcc/ipa.c +++ b/gcc/ipa.c @@ -844,16 +844,32 @@ function_and_variable_visibility (bool whole_program) IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (p->decl)), IDENTIFIER_POINTER (p->target)); - if ((node = cgraph_node_for_asm (p->target)) != NULL) + if ((node = cgraph_node_for_asm (p->target)) != NULL + && !DECL_EXTERNAL (node->decl)) { + /* Weakrefs alias symbols from other compilation unit. In the case + the destination of weakref became available because of LTO, we must + mark it as needed. */ + if (in_lto_p + && lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)) + && !node->needed) + cgraph_mark_needed_node (node); gcc_assert (node->needed); pointer_set_insert (aliased_nodes, node); if (dump_file) fprintf (dump_file, " node %s/%i", cgraph_node_name (node), node->uid); } - else if ((vnode = varpool_node_for_asm (p->target)) != NULL) + else if ((vnode = varpool_node_for_asm (p->target)) != NULL + && !DECL_EXTERNAL (vnode->decl)) { + /* Weakrefs alias symbols from other compilation unit. In the case + the destination of weakref became available because of LTO, we must + mark it as needed. */ + if (in_lto_p + && lookup_attribute ("weakref", DECL_ATTRIBUTES (p->decl)) + && !vnode->needed) + varpool_mark_needed_node (vnode); gcc_assert (vnode->needed); pointer_set_insert (aliased_vnodes, vnode); if (dump_file) @@ -867,6 +883,8 @@ function_and_variable_visibility (bool whole_program) for (node = cgraph_nodes; node; node = node->next) { int flags = flags_from_decl_or_type (node->decl); + + /* Optimize away PURE and CONST constructors and destructors. */ if (optimize && (flags & (ECF_CONST | ECF_PURE)) && !(flags & ECF_LOOPING_CONST_OR_PURE)) @@ -875,6 +893,13 @@ function_and_variable_visibility (bool whole_program) DECL_STATIC_DESTRUCTOR (node->decl) = 0; } + /* Frontends and alias code marks nodes as needed before parsing is finished. + We may end up marking as node external nodes where this flag is meaningless + strip it. */ + if (node->needed + && (DECL_EXTERNAL (node->decl) || !node->analyzed)) + node->needed = 0; + /* C++ FE on lack of COMDAT support create local COMDAT functions (that ought to be shared but can not due to object format limitations). It is neccesary to keep the flag to make rest of C++ FE -- cgit v1.1