-fdata-sections places data symbols into their own, unique, named sections.
-fsection-anchors create an anchor to access neighboring symbols
within a section.
When both are enabled, a separate section anchor is created for each
symbol, which provides no benefit.
This patch updates the common gating function use_blocks_for_decl_p() to
return false if -fdata-sections is enabled.
gcc/ChangeLog:
* varasm.c (use_blocks_for_decl_p): Don't use section anchors
for VAR_DECLs if -fdata-sections enabled.
{
struct symtab_node *snode;
+ /* Don't create object blocks if each DECL is placed into a separate
+ section because that will uselessly create a section anchor for
+ each DECL. */
+ if (flag_data_sections)
+ return false;
+
/* Only data DECLs can be placed into object blocks. */
if (!VAR_P (decl) && TREE_CODE (decl) != CONST_DECL)
return false;