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regmove.c (optimize_reg_copy_1): Update REG_N_CALLS_CROSSED and REG_LIVE_LENGTH as successful substitutions are made. 

* regmove.c (optimize_reg_copy_1): Update REG_N_CALLS_CROSSED
        and REG_LIVE_LENGTH as successful substitutions are made.

From-SVN: r21819
This commit is contained in:
Jeffrey A Law 1998-08-18 09:34:59 +00:00 committed by Jeff Law
parent 5a5325cb72
commit 7b31b7d9bd
2 changed files with 42 additions and 4 deletions
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5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
Tue Aug 18 10:33:30 1998 Jeffrey A Law (law@cygnus.com)
* regmove.c (optimize_reg_copy_1): Update REG_N_CALLS_CROSSED
and REG_LIVE_LENGTH as successful substitutions are made.
Tue Aug 18 07:15:27 1998 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* config/sparc/sparc.c (ultra_find_type): Add empty semicolon

41
gcc/regmove.c
View File

@ -288,12 +288,45 @@ optimize_reg_copy_1 (insn, dest, src)
PATTERN (q))))
{
/* We assume that a register is used exactly once per
insn in the updates below. If this is not correct,
no great harm is done. */
insn in the REG_N_REFS updates below. If this is not
correct, no great harm is done.
We do not undo this substitution if something later
fails. Therefore, we must update the other REG_N_*
counters now to keep them accurate. */
if (sregno >= FIRST_PSEUDO_REGISTER)
REG_N_REFS (sregno) -= loop_depth;
{
REG_N_REFS (sregno) -= loop_depth;
if (REG_LIVE_LENGTH (sregno) >= 0)
{
REG_LIVE_LENGTH (sregno) -= length;
/* REG_LIVE_LENGTH is only an approximation after
combine if sched is not run, so make sure that
we still have a reasonable value. */
if (REG_LIVE_LENGTH (sregno) < 2)
REG_LIVE_LENGTH (sregno) = 2;
}
REG_N_CALLS_CROSSED (sregno) -= n_calls;
}
if (dregno >= FIRST_PSEUDO_REGISTER)
REG_N_REFS (dregno) += loop_depth;
{
REG_N_REFS (dregno) += loop_depth;
if (REG_LIVE_LENGTH (dregno) >= 0)
REG_LIVE_LENGTH (dregno) += d_length;
REG_N_CALLS_CROSSED (dregno) += d_n_calls;
}
/* We've done a substitution, clear the counters. */
length = 0;
d_length = 0;
n_calls = 0;
d_n_calls = 0;
}
else
{