diff options
| -rw-r--r-- | gcc/c-family/c-attribs.cc | 3 | ||||
| -rw-r--r-- | gcc/doc/extend.texi | 5 | ||||
| -rw-r--r-- | gcc/ipa-icf.cc | 3 |
3 files changed, 9 insertions, 2 deletions
diff --git a/gcc/c-family/c-attribs.cc b/gcc/c-family/c-attribs.cc index 854e987..a3671fe 100644 --- a/gcc/c-family/c-attribs.cc +++ b/gcc/c-family/c-attribs.cc @@ -1649,7 +1649,8 @@ handle_noicf_attribute (tree *node, tree name, tree ARG_UNUSED (args), int ARG_UNUSED (flags), bool *no_add_attrs) { - if (TREE_CODE (*node) != FUNCTION_DECL) + if (TREE_CODE (*node) != FUNCTION_DECL + && (TREE_CODE (*node) != VAR_DECL || !is_global_var (*node))) { warning (OPT_Wattributes, "%qE attribute ignored", name); *no_add_attrs = true; diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index e8b5e77..f0c789f 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -8152,6 +8152,11 @@ script to place the sections with the @code{.persistent} prefix in the right location. Specifically, some type of non-volatile, writeable memory is required. +@cindex @code{no_icf} variable attribute +@item no_icf +This variable attribute prevents a variable from being merged with another +equivalent variable. + @cindex @code{objc_nullability} variable attribute @item objc_nullability (@var{nullability kind}) @r{(Objective-C and Objective-C++ only)} This attribute applies to pointer variables only. It allows marking the diff --git a/gcc/ipa-icf.cc b/gcc/ipa-icf.cc index 81232d5..e27536d 100644 --- a/gcc/ipa-icf.cc +++ b/gcc/ipa-icf.cc @@ -3422,7 +3422,8 @@ sem_item_optimizer::merge_classes (unsigned int prev_class_count, alias->node->dump_asm_name ()); } - if (lookup_attribute ("no_icf", DECL_ATTRIBUTES (alias->decl))) + if (lookup_attribute ("no_icf", DECL_ATTRIBUTES (alias->decl)) + || lookup_attribute ("no_icf", DECL_ATTRIBUTES (source->decl))) { if (dump_enabled_p ()) dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, loc, |