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dwarf2out.c (loc_list_from_tree): Don't call rtl_for_decl_location unnecessarily.

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* dwarf2out.c (loc_list_from_tree): Don't call rtl_for_decl_location
	unnecessarily.
	(rtl_for_decl_location): Try harder to get a rtl for TREE_STATIC vars.

From-SVN: r154285
This commit is contained in:
Jakub Jelinek 2009-11-18 10:57:47 +01:00 committed by Jakub Jelinek
parent b25833451b
commit 4f517dce47
2 changed files with 32 additions and 3 deletions
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4
gcc/ChangeLog
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@ -1,5 +1,9 @@
2009-11-18 Jakub Jelinek <jakub@redhat.com>
* dwarf2out.c (loc_list_from_tree): Don't call rtl_for_decl_location
unnecessarily.
(rtl_for_decl_location): Try harder to get a rtl for TREE_STATIC vars.
PR c++/3187
* cgraph.h (struct cgraph_node): Add same_body and same_body_alias
fields.

29
gcc/dwarf2out.c
View File

@ -14309,13 +14309,17 @@ loc_list_from_tree (tree loc, int want_address)
case RESULT_DECL:
case FUNCTION_DECL:
{
rtx rtl = rtl_for_decl_location (loc);
rtx rtl;
var_loc_list *loc_list = lookup_decl_loc (loc);
if (loc_list && loc_list->first
&& (list_ret = dw_loc_list (loc_list, loc, want_address)))
{
have_address = want_address != 0;
else if (rtl == NULL_RTX)
break;
}
rtl = rtl_for_decl_location (loc);
if (rtl == NULL_RTX)
{
expansion_failed (loc, NULL_RTX, "DECL has no RTL");
return 0;
@ -15605,6 +15609,27 @@ rtl_for_decl_location (tree decl)
if (rtl)
rtl = avoid_constant_pool_reference (rtl);
/* Try harder to get a rtl. If this symbol ends up not being emitted
in the current CU, resolve_addr will remove the expression referencing
it. */
if (rtl == NULL_RTX
&& TREE_CODE (decl) == VAR_DECL
&& !DECL_EXTERNAL (decl)
&& TREE_STATIC (decl)
&& DECL_NAME (decl)
&& !DECL_HARD_REGISTER (decl)
&& DECL_MODE (decl) != VOIDmode)
{
rtl = DECL_RTL (decl);
/* Reset DECL_RTL back, as various parts of the compiler expects
DECL_RTL set meaning it is actually going to be output. */
SET_DECL_RTL (decl, NULL);
if (!MEM_P (rtl)
|| GET_CODE (XEXP (rtl, 0)) != SYMBOL_REF
|| SYMBOL_REF_DECL (XEXP (rtl, 0)) != decl)
rtl = NULL_RTX;
}
return rtl;
}