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| author | Vladimir Makarov <vmakarov@redhat.com> | 2013-10-03 00:35:43 +0000 |
|---|---|---|
| committer | Vladimir Makarov <vmakarov@gcc.gnu.org> | 2013-10-03 00:35:43 +0000 |
| commit | 80f466c4a620cf19a74531420f29f2b50fa43931 (patch) | |
| tree | c383cf177580793322fe352bf3ad89392c51b481 /gcc/lra-constraints.c | |
| parent | 7cfbb5a278b3eeda907d08de62a67d0fa4ba087c (diff) | |
| download | gcc-80f466c4a620cf19a74531420f29f2b50fa43931.zip gcc-80f466c4a620cf19a74531420f29f2b50fa43931.tar.gz gcc-80f466c4a620cf19a74531420f29f2b50fa43931.tar.bz2 | |
lra-constraints.c (process_alt_operand): Calculate scratch_p and use it.
2013-10-02 Vladimir Makarov <vmakarov@redhat.com>
* lra-constraints.c (process_alt_operand): Calculate scratch_p and
use it. Use smaller increase for scratch. Don't increase reject
for early clobber scratch.
* lra-eliminations.c (eliminate_regs_in_insn): Remove all insns
setting eliminated regs except setting fp from hfp.
(lra_eliminate): Check lra_insn_recog_data on NULL.
From-SVN: r203147
Diffstat (limited to 'gcc/lra-constraints.c')
| -rw-r--r-- | gcc/lra-constraints.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index f9652c7..783df16 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -1453,6 +1453,7 @@ process_alt_operands (int only_alternative) HARD_REG_SET this_alternative_set, this_costly_alternative_set; bool this_alternative_match_win, this_alternative_win; bool this_alternative_offmemok; + bool scratch_p; enum machine_mode mode; opalt_num = nalt * n_operands + nop; @@ -1858,6 +1859,8 @@ process_alt_operands (int only_alternative) } while ((p += len), c); + scratch_p = (operand_reg[nop] != NULL_RTX + && lra_former_scratch_p (REGNO (operand_reg[nop]))); /* Record which operands fit this alternative. */ if (win) { @@ -1878,14 +1881,17 @@ process_alt_operands (int only_alternative) } else { - /* Prefer won reg to spilled pseudo under other equal - conditions. */ - if (lra_dump_file != NULL) - fprintf - (lra_dump_file, - " %d Non pseudo reload: reject++\n", - nop); - reject++; + /* Prefer won reg to spilled pseudo under other + equal conditions for possibe inheritance. */ + if (! scratch_p) + { + if (lra_dump_file != NULL) + fprintf + (lra_dump_file, + " %d Non pseudo reload: reject++\n", + nop); + reject++; + } if (in_class_p (operand_reg[nop], this_costly_alternative, NULL)) { @@ -1904,13 +1910,13 @@ process_alt_operands (int only_alternative) insns are generated for the scratches. So it might cost something but probably less than old reload pass believes. */ - if (lra_former_scratch_p (REGNO (operand_reg[nop]))) + if (scratch_p) { if (lra_dump_file != NULL) fprintf (lra_dump_file, - " %d Scratch win: reject+=3\n", + " %d Scratch win: reject+=2\n", nop); - reject += 3; + reject += 2; } } } @@ -2124,7 +2130,7 @@ process_alt_operands (int only_alternative) } } - if (early_clobber_p) + if (early_clobber_p && ! scratch_p) { if (lra_dump_file != NULL) fprintf (lra_dump_file, |