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Save some memory at debug stream-in time

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This allows us to release references to BLOCKs by not keeping
them rooted in the external_die_map but instead remove it from
there as soon as we created the corresponding stub DIE.  For
decls it doesn't help since we still keep the decl_die_table.

2020-11-03  Richard Biener  <rguenther@suse.de>

	* dwarf2out.c (maybe_create_die_with_external_ref): Remove
	hashtable entry.
This commit is contained in:
Richard Biener 2020-11-03 12:28:03 +01:00
parent ed62f3668b
commit 104ca9cfa6
1 changed files with 1 additions and 0 deletions
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gcc/dwarf2out.c
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@ -5974,6 +5974,7 @@ maybe_create_die_with_external_ref (tree decl)
const char *sym = desc->sym;
unsigned HOST_WIDE_INT off = desc->off;
external_die_map->remove (decl);
in_lto_p = false;
dw_die_ref die = (TREE_CODE (decl) == BLOCK