------- Comment #6 from jakub at gcc dot gnu dot org 2009-01-03 09:09 -------
--- i386.c.jj4 2008-12-27 10:12:25.000000000 +0100
+++ i386.c 2009-01-03 10:03:05.000000000 +0100
@@ -18012,13 +18012,12 @@ ix86_expand_setmem (rtx dst, rtx count_e
Epilogue code will actually copy COUNT_EXP & EPILOGUE_SIZE_NEEDED
bytes. Compensate if needed. */
- if (size_needed < desired_align - align)
+ if (size_needed < epilogue_size_needed)
{
tmp =
expand_simple_binop (counter_mode (count_exp), AND, count_exp,
GEN_INT (size_needed - 1), count_exp, 1,
OPTAB_DIRECT);
- size_needed = desired_align - align + 1;
if (tmp != count_exp)
emit_move_insn (count_exp, tmp);
}
@@ -18029,10 +18028,10 @@ ix86_expand_setmem (rtx dst, rtx count_e
{
if (force_loopy_epilogue)
expand_setmem_epilogue_via_loop (dst, destreg, val_exp, count_exp,
- size_needed);
+ epilogue_size_needed);
else
expand_setmem_epilogue (dst, destreg, promoted_val, count_exp,
- size_needed);
+ epilogue_size_needed);
}
if (jump_around_label)
emit_label (jump_around_label);
instead seems to fix memset-3.c with -mtune=pentium-m -m32 at all optimizations
levels (and is what ix86_expand_movmem does). But memset-2.c still fails, and
not just at -O3, but also at -O2.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38708
