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handle undefined extern vars in output_in_order 

* cgraphunit.c (cgraph_order_sort_kind): New entry ORDER_VAR_UNDEF.
(output_in_order): Loop over undefined variables too.  Output them
via assemble_undefined_decl.  Skip variables that correspond to hard
registers or have value-exprs.
* varpool.c (symbol_table::output_variables): Handle undefined
variables together with defined ones.

From-SVN: r238371
This commit is contained in:
Alexander Monakov 2016-07-15 14:01:23 +03:00 committed by Alexander Monakov
parent a8e15f9074
commit 3ef4678208
3 changed files with 36 additions and 31 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2016-07-15 Alexander Monakov <amonakov@ispras.ru>
* cgraphunit.c (cgraph_order_sort_kind): New entry ORDER_VAR_UNDEF.
(output_in_order): Loop over undefined variables too. Output them
via assemble_undefined_decl. Skip variables that correspond to hard
registers or have value-exprs.
* varpool.c (symbol_table::output_variables): Handle undefined
variables together with defined ones.
2016-07-15 Richard Biener <rguenther@suse.de>
* tree-ssa-pre.c (get_representative_for): Make sure to return

36
gcc/cgraphunit.c
View File

@ -2141,6 +2141,7 @@ enum cgraph_order_sort_kind
ORDER_UNDEFINED = 0,
ORDER_FUNCTION,
ORDER_VAR,
ORDER_VAR_UNDEF,
ORDER_ASM
};
@ -2187,16 +2188,20 @@ output_in_order (bool no_reorder)
}
}
FOR_EACH_DEFINED_VARIABLE (pv)
if (!DECL_EXTERNAL (pv->decl))
{
if (no_reorder && !pv->no_reorder)
continue;
i = pv->order;
gcc_assert (nodes[i].kind == ORDER_UNDEFINED);
nodes[i].kind = ORDER_VAR;
nodes[i].u.v = pv;
}
/* There is a similar loop in symbol_table::output_variables.
Please keep them in sync. */
FOR_EACH_VARIABLE (pv)
{
if (no_reorder && !pv->no_reorder)
continue;
if (DECL_HARD_REGISTER (pv->decl)
|| DECL_HAS_VALUE_EXPR_P (pv->decl))
continue;
i = pv->order;
gcc_assert (nodes[i].kind == ORDER_UNDEFINED);
nodes[i].kind = pv->definition ? ORDER_VAR : ORDER_VAR_UNDEF;
nodes[i].u.v = pv;
}
for (pa = symtab->first_asm_symbol (); pa; pa = pa->next)
{
@ -2222,16 +2227,13 @@ output_in_order (bool no_reorder)
break;
case ORDER_VAR:
#ifdef ACCEL_COMPILER
/* Do not assemble "omp declare target link" vars. */
if (DECL_HAS_VALUE_EXPR_P (nodes[i].u.v->decl)
&& lookup_attribute ("omp declare target link",
DECL_ATTRIBUTES (nodes[i].u.v->decl)))
break;
#endif
nodes[i].u.v->assemble_decl ();
break;
case ORDER_VAR_UNDEF:
assemble_undefined_decl (nodes[i].u.v->decl);
break;
case ORDER_ASM:
assemble_asm (nodes[i].u.a->asm_str);
break;

22
gcc/varpool.c
View File

@ -733,11 +733,6 @@ symbol_table::output_variables (void)
timevar_push (TV_VAROUT);
FOR_EACH_VARIABLE (node)
if (!node->definition
&& !DECL_HAS_VALUE_EXPR_P (node->decl)
&& !DECL_HARD_REGISTER (node->decl))
assemble_undefined_decl (node->decl);
FOR_EACH_DEFINED_VARIABLE (node)
{
/* Handled in output_in_order. */
@ -747,20 +742,19 @@ symbol_table::output_variables (void)
node->finalize_named_section_flags ();
}
FOR_EACH_DEFINED_VARIABLE (node)
/* There is a similar loop in output_in_order. Please keep them in sync. */
FOR_EACH_VARIABLE (node)
{
/* Handled in output_in_order. */
if (node->no_reorder)
continue;
#ifdef ACCEL_COMPILER
/* Do not assemble "omp declare target link" vars. */
if (DECL_HAS_VALUE_EXPR_P (node->decl)
&& lookup_attribute ("omp declare target link",
DECL_ATTRIBUTES (node->decl)))
if (DECL_HARD_REGISTER (node->decl)
|| DECL_HAS_VALUE_EXPR_P (node->decl))
continue;
#endif
if (node->assemble_decl ())
changed = true;
if (node->definition)
changed |= node->assemble_decl ();
else
assemble_undefined_decl (node->decl);
}
timevar_pop (TV_VAROUT);
return changed;