* expr.c (expand_assignment) [COMPONENT_REF]: Don't put
the UNCHANGING_RTX_P flag on memory references to read-only
components that are not addressable.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@73542
138bc75d-0d04-0410-961f-
82ee72b054a4
+2003-11-13 Eric Botcazou <ebotcazou@libertysurf.fr>
+
+ PR optimization/12926
+ * expr.c (expand_assignment) [COMPONENT_REF]: Don't put
+ the UNCHANGING_RTX_P flag on memory references to read-only
+ components that are not addressable.
+
2003-11-12 Kazu Hirata <kazu@cs.umass.edu>
* config/h8300/lib1funcs.asm (divmodsi4): Clear S0P in
}
if (TREE_CODE (to) == COMPONENT_REF
- && TREE_READONLY (TREE_OPERAND (to, 1)))
+ && TREE_READONLY (TREE_OPERAND (to, 1))
+ /* We can't assert that a MEM won't be set more than once
+ if the component is not addressable because another
+ non-addressable component may be referenced by the same MEM. */
+ && ! (GET_CODE (to_rtx) == MEM && ! can_address_p (to)))
{
if (to_rtx == orig_to_rtx)
to_rtx = copy_rtx (to_rtx);
+2003-11-13 Eric Botcazou <ebotcazou@libertysurf.fr>
+
+ * g++.dg/opt/const3.C: New test.
+
2003-11-13 Jan Hubicka <jh@suse.cz>
* gcc.c-torture/compile/20031112-1.c: New test.
--- /dev/null
+// PR optimization/12926
+// This failed on SPARC64 because the assignments to the bit-fields
+// were wrongly swapped in the constructor.
+
+// { dg-do run }
+// { dg-options "-O2" }
+
+extern void abort(void);
+
+typedef __SIZE_TYPE__ size_t;
+
+void *my_out;
+
+struct A
+{
+ enum Type {P, U, S};
+
+ int foo1(void *, const char *);
+ int foo2(int, const Type);
+
+ A (const size_t size, const Type type): mSize(size), mType(type)
+ {
+ foo2(foo1(my_out, "type = "), type);
+ foo2(foo1(my_out, "mType = "), mType);
+ }
+
+ const size_t mSize : 8*sizeof(size_t) - 3;
+ Type mType : 2;
+};
+
+int i;
+
+int A::foo1(void *ios, const char *str) { }
+int A::foo2(int v, const Type t) { i=0; }
+
+int main()
+{
+ A testa(2, A::S);
+
+ if (testa.mType != A::S)
+ abort();
+
+ return 0;
+}