http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61060
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
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CC| |hubicka at ucw dot cz
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
The code in ix86_expand_set_or_movmem assumes that !count implies non-const_int
count_exp:
unsigned HOST_WIDE_INT count = 0;
...
if (CONST_INT_P (count_exp))
min_size = max_size = probable_max_size = count = expected_size
= INTVAL (count_exp);
...
if (!count)
count_exp = copy_to_mode_reg (GET_MODE (count_exp), count_exp);
However, when count_exp is (const_int 0), the assumption breaks, and the code
tries to determine the mode of modeless (const_int 0) count_exp RTX.
CC author of the code.
