+2010-05-24 Eric Botcazou <ebotcazou@adacore.com>
+
+ PR middle-end/44100
+ * typeck.c (cp_build_unary_op): Fold offsetof-like computations.
+
2010-05-24 Joseph Myers <joseph@codesourcery.com>
* error.c (cp_diagnostic_starter): Update call to
return arg;
}
+ /* ??? Cope with user tricks that amount to offsetof. */
+ if (TREE_CODE (argtype) != FUNCTION_TYPE
+ && TREE_CODE (argtype) != METHOD_TYPE
+ && argtype != unknown_type_node
+ && (val = get_base_address (arg))
+ && TREE_CODE (val) == INDIRECT_REF
+ && TREE_CONSTANT (TREE_OPERAND (val, 0)))
+ {
+ tree type = build_pointer_type (argtype);
+ tree op0 = fold_convert (type, TREE_OPERAND (val, 0));
+ tree op1 = fold_convert (sizetype, fold_offsetof (arg, val));
+ return fold_build2 (POINTER_PLUS_EXPR, type, op0, op1);
+ }
+
/* Uninstantiated types are all functions. Taking the
address of a function is a no-op, so just return the
argument. */
2010-05-24 Eric Botcazou <ebotcazou@adacore.com>
+ * g++.dg/parse/array-size2.C: Remove dg-error directives.
+
+2010-05-24 Eric Botcazou <ebotcazou@adacore.com>
+
PR ada/38394
* gnat.dg/array13.ad[sb]: New test.
// PR c/25682
// { dg-do compile }
-// Test whether we don't ICE on invalid array sizes.
+// Test whether we don't ICE on questionable constructs where offsetof
+// should have been used instead.
struct S
{
void
foo (void)
{
- char g[(char *) &((struct S *) 0)->b - (char *) 0]; // { dg-error "not an integral constant-expression" }
- char h[(__SIZE_TYPE__) &((struct S *) 8)->b]; // { dg-error "not an integral constant-expression" }
+ char g[(char *) &((struct S *) 0)->b - (char *) 0];
+ char h[(__SIZE_TYPE__) &((struct S *) 8)->b];
bar (g, h);
}