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Error about alias attribute with body definition (PR c/87483).

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2018-10-04  Martin Liska  <mliska@suse.cz>

	PR c/87483
	* cgraphunit.c (process_function_and_variable_attributes):
	Warn about a function with alias attribute and a body.
2018-10-04  Martin Liska  <mliska@suse.cz>

	PR c/87483
	* gcc.dg/pr87483.c: New test.

From-SVN: r264846
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Martin Liska 2018-10-04 16:44:53 +02:00 • committed by Martin Liska
parent b8ce8129a5
commit 96c545e5ed
4 changed files with 33 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2018-10-04 Martin Liska <mliska@suse.cz>
PR c/87483
* cgraphunit.c (process_function_and_variable_attributes):
Warn about a function with alias attribute and a body.
2018-10-04 Martin Liska <mliska@suse.cz>
PR ipa/82625

6
gcc/cgraphunit.c
View file

@ -784,6 +784,12 @@ process_function_and_variable_attributes (cgraph_node *first,
DECL_ATTRIBUTES (decl) = remove_attribute ("weakref",
DECL_ATTRIBUTES (decl));
}
else if (lookup_attribute ("alias", DECL_ATTRIBUTES (decl))
&& node->definition
&& !node->alias)
warning_at (DECL_SOURCE_LOCATION (node->decl), OPT_Wattributes,
"%<alias%> attribute ignored"
" because function is defined");
if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (decl))
&& !DECL_DECLARED_INLINE_P (decl)

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2018-10-04 Martin Liska <mliska@suse.cz>
PR c/87483
* gcc.dg/pr87483.c: New test.
2018-10-04 Martin Liska <mliska@suse.cz>
PR ipa/82625

16
gcc/testsuite/gcc.dg/pr87483.c Normal file
View file

@ -0,0 +1,16 @@
/* PR c/87483 */
/* { dg-require-alias "" } */
int f (void) { return 0; }
__attribute__ ((alias ("f"))) int g () { return 1; } /* { dg-warning "attribute ignored because function is defined" } */
__attribute__ ((alias ("f"))) int g2 ();
int h (void)
{
return g2 ();
}
int main()
{
return h();
}