* c-decl.c (check_bitfield_type_and_width): Only pedwarn if
pedantic for bit-field width not an integer constant expression
but folding to one.
testsuite:
* gcc.dg/bitfld-19.c, gcc.dg/bitfld-20.c, gcc.dg/bitfld-21.c: New
tests.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@155526
138bc75d-0d04-0410-961f-
82ee72b054a4
+2009-12-30 Joseph Myers <joseph@codesourcery.com>
+
+ PR c/42439
+ * c-decl.c (check_bitfield_type_and_width): Only pedwarn if
+ pedantic for bit-field width not an integer constant expression
+ but folding to one.
+
2009-12-30 Ira Rosen <irar@il.ibm.com>
PR tree-optimization/41956
2009-12-30 Ira Rosen <irar@il.ibm.com>
PR tree-optimization/41956
/* Detect and ignore out of range field width and process valid
field widths. */
/* Detect and ignore out of range field width and process valid
field widths. */
- if (!INTEGRAL_TYPE_P (TREE_TYPE (*width))
- || TREE_CODE (*width) != INTEGER_CST)
+ if (!INTEGRAL_TYPE_P (TREE_TYPE (*width)))
{
error ("bit-field %qs width not an integer constant", name);
*width = integer_one_node;
}
else
{
{
error ("bit-field %qs width not an integer constant", name);
*width = integer_one_node;
}
else
{
+ if (TREE_CODE (*width) != INTEGER_CST)
+ {
+ *width = c_fully_fold (*width, false, NULL);
+ if (TREE_CODE (*width) == INTEGER_CST)
+ pedwarn (input_location, OPT_pedantic,
+ "bit-field %qs width not an integer constant expression",
+ name);
+ }
+ if (TREE_CODE (*width) != INTEGER_CST)
+ {
+ error ("bit-field %qs width not an integer constant", name);
+ *width = integer_one_node;
+ }
constant_expression_warning (*width);
if (tree_int_cst_sgn (*width) < 0)
{
constant_expression_warning (*width);
if (tree_int_cst_sgn (*width) < 0)
{
+2009-12-30 Joseph Myers <joseph@codesourcery.com>
+
+ PR c/42439
+ * gcc.dg/bitfld-19.c, gcc.dg/bitfld-20.c, gcc.dg/bitfld-21.c: New
+ tests.
+
2009-12-30 Ira Rosen <irar@il.ibm.com>
PR tree-optimization/41956
2009-12-30 Ira Rosen <irar@il.ibm.com>
PR tree-optimization/41956
--- /dev/null
+/* Test for bit-field widths not integer constant expressions but
+ folding to integer constants: PR 42439. */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+void
+f (void)
+{
+ const int m = 1;
+ ((void)(sizeof(struct { int i:!!m; })));
+}
--- /dev/null
+/* Test for bit-field widths not integer constant expressions but
+ folding to integer constants: PR 42439. */
+/* { dg-do compile } */
+/* { dg-options "-O2 -pedantic" } */
+
+void
+f (void)
+{
+ const int m = 1;
+ ((void)(sizeof(struct { int i:!!m; }))); /* { dg-warning "not an integer constant expression" } */
+}
--- /dev/null
+/* Test for bit-field widths not integer constant expressions but
+ folding to integer constants: PR 42439. */
+/* { dg-do compile } */
+/* { dg-options "-O2 -pedantic-errors" } */
+
+void
+f (void)
+{
+ const int m = 1;
+ ((void)(sizeof(struct { int i:!!m; }))); /* { dg-error "not an integer constant expression" } */
+}