gcc/
PR middle-end/62103
* gimple-fold.c (fold_ctor_reference): Don't fold in presence of
bitfields, that is when size doesn't match the size of type or the
size of the constructor.
gcc/testsuite/
PR middle-end/62103
* gcc.c-torture/execute/bitfld-6.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@213846
138bc75d-0d04-0410-961f-
82ee72b054a4
+2014-08-12 Thomas Preud'homme <thomas.preudhomme@arm.com>
+
+ PR middle-end/62103
+ * gimple-fold.c (fold_ctor_reference): Don't fold in presence of
+ bitfields, that is when size doesn't match the size of type or the
+ size of the constructor.
+
2014-08-11 Michael Meissner <meissner@linux.vnet.ibm.com>
* config/rs6000/constraints.md (wh constraint): New constraint,
result. */
if (!AGGREGATE_TYPE_P (TREE_TYPE (ctor)) && !offset
/* VIEW_CONVERT_EXPR is defined only for matching sizes. */
- && operand_equal_p (TYPE_SIZE (type),
- TYPE_SIZE (TREE_TYPE (ctor)), 0))
+ && !compare_tree_int (TYPE_SIZE (type), size)
+ && !compare_tree_int (TYPE_SIZE (TREE_TYPE (ctor)), size))
{
ret = canonicalize_constructor_val (unshare_expr (ctor), from_decl);
ret = fold_unary (VIEW_CONVERT_EXPR, type, ret);
+2014-08-12 Thomas Preud'homme <thomas.preudhomme@arm.com>
+
+ PR middle-end/62103
+ * gcc.c-torture/execute/bitfld-6.c: New test.
+
2014-08-11 Janis Johnson <janisjo@codesourcery.com>
* gcc.target/arm/frame-pointer-1.c: Skip if Thumb is not supported.
--- /dev/null
+union U
+{
+ const int a;
+ unsigned b : 20;
+};
+
+static union U u = { 0x12345678 };
+
+/* Constant folding used to fail to account for endianness when folding a
+ union. */
+
+int
+main (void)
+{
+#ifdef __BYTE_ORDER__
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+ return u.b - 0x45678;
+#else
+ return u.b - 0x12345;
+#endif
+#endif
+ return 0;
+}