diff options
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/config/cris/cris.md | 2 | ||||
| -rw-r--r-- | gcc/targhooks.c | 11 |
3 files changed, 16 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 580dd53..f26b24a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2005-11-25 Hans-Peter Nilsson <hp@axis.com> + + * config/cris/cris.md ("reload_out<mode>"): Mark operand 2 as + earlyclobber. + * targhooks.c (default_secondary_reload): Don't require operand 2 + for an input reload to be earlyclobber. + 2005-11-25 Volker Reichelt <reichelt@igpm.rwth-aachen.de> * fold-const.c (negate_mathfn_p): Fix comment and add support diff --git a/gcc/config/cris/cris.md b/gcc/config/cris/cris.md index 37bd4ab..5665897 100644 --- a/gcc/config/cris/cris.md +++ b/gcc/config/cris/cris.md @@ -1151,7 +1151,7 @@ "") (define_expand "reload_out<mode>" - [(set (match_operand:BW 2 "register_operand" "=r") + [(set (match_operand:BW 2 "register_operand" "=&r") (match_operand:BW 1 "register_operand" "x")) (set (match_operand:BW 0 "memory_operand" "=m") (match_dup 2))] diff --git a/gcc/targhooks.c b/gcc/targhooks.c index 1d5a7fe..afeba1f 100644 --- a/gcc/targhooks.c +++ b/gcc/targhooks.c @@ -514,10 +514,15 @@ default_secondary_reload (bool in_p ATTRIBUTE_UNUSED, rtx x ATTRIBUTE_UNUSED, } scratch_constraint = insn_data[(int) icode].operand[2].constraint; - /* The scratch register's constraint must start with "=&". */ + /* The scratch register's constraint must start with "=&", + except for an input reload, where only "=" is necessary, + and where it might be beneficial to re-use registers from + the input. */ gcc_assert (scratch_constraint[0] == '=' - && scratch_constraint[1] == '&'); - scratch_constraint += 2; + && (in_p || scratch_constraint[1] == '&')); + scratch_constraint++; + if (*scratch_constraint == '&') + scratch_constraint++; scratch_letter = *scratch_constraint; scratch_class = (scratch_letter == 'r' ? GENERAL_REGS |