From 155c92a7a0a4ce7738d1d8851e572ea790f34ffb Mon Sep 17 00:00:00 2001 From: Jan Hubicka Date: Fri, 3 Sep 2010 12:15:54 +0200 Subject: cgraph.h (struct varpool_node): Add const_value_known. * cgraph.h (struct varpool_node): Add const_value_known. (varpool_decide_const_value_known): Declare. * tree-ssa-ccp.c (fold_const_aggregate_ref): Update initializer folding. * lto-cgraph.c (lto_output_varpool_node): Store const_value_known. (input_varpool_node): Restore const_value_known. * tree-ssa-loop-ivcanon (constant_after_peeling): Check varpool for initializer folding. * ipa.c (ipa_discover_readonly_nonaddressable_var, function_and_variable_visibility): Compute const_value_known. * gimple-fold.c (get_symbol_constant_value): Use varpool for initializer folding. * varpool.c (varpool_decide_const_value_known): New function. From-SVN: r163808 --- gcc/ipa.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'gcc/ipa.c') diff --git a/gcc/ipa.c b/gcc/ipa.c index 021398b..b199796 100644 --- a/gcc/ipa.c +++ b/gcc/ipa.c @@ -561,6 +561,7 @@ ipa_discover_readonly_nonaddressable_vars (void) if (dump_file) fprintf (dump_file, " %s (read-only)", varpool_node_name (vnode)); TREE_READONLY (vnode->decl) = 1; + vnode->const_value_known |= varpool_decide_const_value_known (vnode); } } if (dump_file) @@ -767,6 +768,9 @@ function_and_variable_visibility (bool whole_program) || ! (ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (TREE_TYPE (vnode->decl)))))) DECL_COMMON (vnode->decl) = 0; + /* Even extern variables might have initializers known. + See, for example testsuite/g++.dg/opt/static3.C */ + vnode->const_value_known |= varpool_decide_const_value_known (vnode); } for (vnode = varpool_nodes_queue; vnode; vnode = vnode->next_needed) { @@ -801,6 +805,7 @@ function_and_variable_visibility (bool whole_program) gcc_assert (in_lto_p || whole_program || !TREE_PUBLIC (vnode->decl)); cgraph_make_decl_local (vnode->decl); } + vnode->const_value_known |= varpool_decide_const_value_known (vnode); gcc_assert (TREE_STATIC (vnode->decl)); } pointer_set_destroy (aliased_nodes); -- cgit v1.1