Hi!
The copy attributes is allowed on decls as well as types and even has
checks whether decl (set to *node) is DECL_P or TYPE_P, but for diagnostics
unconditionally uses DECL_SOURCE_LOCATION (decl), which obviously only works
if it applies to a decl.
The following patch fixes that, bootstrapped/regtested on x86_64-linux and
i686-linux, ok for trunk?
2024-01-09 Jakub Jelinek <ja...@redhat.com>
PR c/113262
* c-attribs.cc (handle_copy_attribute): Don't use
DECL_SOURCE_LOCATION (decl) if decl is not DECL_P, use input_location
instead. Formatting fixes.
* gcc.dg/pr113262.c: New test.
--- gcc/c-family/c-attribs.cc.jj 2024-01-03 12:07:02.020736256 +0100
+++ gcc/c-family/c-attribs.cc 2024-01-08 22:10:04.789616664 +0100
@@ -3143,13 +3143,14 @@ handle_copy_attribute (tree *node, tree
if (ref == error_mark_node)
return NULL_TREE;
+ location_t loc = input_location;
+ if (DECL_P (decl))
+ loc = DECL_SOURCE_LOCATION (decl);
if (TREE_CODE (ref) == STRING_CST)
{
/* Explicitly handle this case since using a string literal
as an argument is a likely mistake. */
- error_at (DECL_SOURCE_LOCATION (decl),
- "%qE attribute argument cannot be a string",
- name);
+ error_at (loc, "%qE attribute argument cannot be a string", name);
return NULL_TREE;
}
@@ -3160,10 +3161,8 @@ handle_copy_attribute (tree *node, tree
/* Similar to the string case, since some function attributes
accept literal numbers as arguments (e.g., alloc_size or
nonnull) using one here is a likely mistake. */
- error_at (DECL_SOURCE_LOCATION (decl),
- "%qE attribute argument cannot be a constant arithmetic "
- "expression",
- name);
+ error_at (loc, "%qE attribute argument cannot be a constant arithmetic "
+ "expression", name);
return NULL_TREE;
}
@@ -3171,12 +3170,11 @@ handle_copy_attribute (tree *node, tree
{
/* Another possible mistake (but indirect self-references aren't
and diagnosed and shouldn't be). */
- if (warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wattributes,
+ if (warning_at (loc, OPT_Wattributes,
"%qE attribute ignored on a redeclaration "
- "of the referenced symbol",
- name))
- inform (DECL_SOURCE_LOCATION (node[1]),
- "previous declaration here");
+ "of the referenced symbol", name)
+ && DECL_P (node[1]))
+ inform (DECL_SOURCE_LOCATION (node[1]), "previous declaration here");
return NULL_TREE;
}
@@ -3196,7 +3194,8 @@ handle_copy_attribute (tree *node, tree
ref = TREE_OPERAND (ref, 1);
else
break;
- } while (!DECL_P (ref));
+ }
+ while (!DECL_P (ref));
/* For object pointer expressions, consider those to be requests
to copy from their type, such as in:
@@ -3228,8 +3227,7 @@ handle_copy_attribute (tree *node, tree
to a variable, or variable attributes to a function. */
if (warning (OPT_Wattributes,
"%qE attribute ignored on a declaration of "
- "a different kind than referenced symbol",
- name)
+ "a different kind than referenced symbol", name)
&& DECL_P (ref))
inform (DECL_SOURCE_LOCATION (ref),
"symbol %qD referenced by %qD declared here", ref, decl);
@@ -3279,9 +3277,7 @@ handle_copy_attribute (tree *node, tree
}
else if (!TYPE_P (decl))
{
- error_at (DECL_SOURCE_LOCATION (decl),
- "%qE attribute must apply to a declaration",
- name);
+ error_at (loc, "%qE attribute must apply to a declaration", name);
return NULL_TREE;
}
--- gcc/testsuite/gcc.dg/pr113262.c.jj 2024-01-08 22:19:07.414588762 +0100
+++ gcc/testsuite/gcc.dg/pr113262.c 2024-01-08 22:18:51.327815573 +0100
@@ -0,0 +1,6 @@
+/* PR c/113262 */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+int [[gnu::copy ("")]] a; /* { dg-error "'copy' attribute argument cannot
be a string" } */
+
Jakub
