2002-02-13 Jakub Jelinek <jakub@redhat.com>
+ PR c/5681:
+ * expr.c (safe_from_p): Pass VOIDmode to true_dependence instead of
+ GET_MODE (x).
+
+2002-02-13 Jakub Jelinek <jakub@redhat.com>
+
PR optimization/5547:
* config/i386/i386.c (i386_simplify_dwarf_addr): Simplify
all valid IA-32 address modes involving non-scaled %ebx and
are memory and they conflict. */
return ! (rtx_equal_p (x, exp_rtl)
|| (GET_CODE (x) == MEM && GET_CODE (exp_rtl) == MEM
- && true_dependence (exp_rtl, GET_MODE (x), x,
+ && true_dependence (exp_rtl, VOIDmode, x,
rtx_addr_varies_p)));
}
* g++.dg/other/debug3.C: New test.
+ * gcc.c-torture/execute/20020213-1.c: New test.
+
2002-02-13 Richard Smith <richard@ex-parrot.com>
* g++.old-deja/g++.other/thunk1.C: New test.
--- /dev/null
+/* PR c/5681
+ This testcase failed on IA-32 at -O0, because safe_from_p
+ incorrectly assumed it is safe to first write into a.a2 b-1
+ and then read the original value from it. */
+
+int bar (float);
+
+struct A {
+ float a1;
+ int a2;
+} a;
+
+int b;
+
+void foo (void)
+{
+ a.a2 = bar (a.a1);
+ a.a2 = a.a2 < b - 1 ? a.a2 : b - 1;
+ if (a.a2 >= b - 1)
+ abort ();
+}
+
+int bar (float x)
+{
+ return 2241;
+}
+
+int main()
+{
+ a.a1 = 1.0f;
+ b = 3384;
+ foo ();
+ return 0;
+}