OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

(mark_set_1, mark_used_regs): Clean up usages of ALL_NEEDED; change to 

SOME_NOT_NEEDED and set properly.

From-SVN: r11967
This commit is contained in:
Richard Kenner 1996-05-10 18:33:30 -04:00
parent d1b0168185
commit cb9e8ad176
1 changed files with 21 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
gcc/flow.c
View File

@ -2006,8 +2006,8 @@ mark_set_1 (needed, dead, x, insn, significant)
register int offset = regno / REGSET_ELT_BITS;
register REGSET_ELT_TYPE bit
= (REGSET_ELT_TYPE) 1 << (regno % REGSET_ELT_BITS);
REGSET_ELT_TYPE all_needed = (needed[offset] & bit);
REGSET_ELT_TYPE some_needed = (needed[offset] & bit);
REGSET_ELT_TYPE some_not_needed = (~ needed[offset]) & bit;
/* Mark it as a significant register for this basic block. */
if (significant)
@ -2030,17 +2030,17 @@ mark_set_1 (needed, dead, x, insn, significant)
n = HARD_REGNO_NREGS (regno, GET_MODE (reg));
while (--n > 0)
{
REGSET_ELT_TYPE n_bit
= (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS);
if (significant)
significant[(regno + n) / REGSET_ELT_BITS]
|= (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS);
dead[(regno + n) / REGSET_ELT_BITS]
|= (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS);
significant[(regno + n) / REGSET_ELT_BITS] |= n_bit;
dead[(regno + n) / REGSET_ELT_BITS] |= n_bit;
some_needed
|= (needed[(regno + n) / REGSET_ELT_BITS]
& (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS));
all_needed
&= (needed[(regno + n) / REGSET_ELT_BITS]
& (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS));
|= (needed[(regno + n) / REGSET_ELT_BITS] & n_bit);
some_not_needed
|= ((~ needed[(regno + n) / REGSET_ELT_BITS]) & n_bit);
}
}
/* Additional data to record if this is the final pass. */
@ -2092,7 +2092,7 @@ mark_set_1 (needed, dead, x, insn, significant)
reg_live_length[regno]++;
}
if (all_needed)
if (! some_not_needed)
{
/* Make a logical link from the next following insn
that uses this register, back to this insn.
@ -2435,10 +2435,11 @@ mark_used_regs (needed, live, x, final, insn)
register int offset = regno / REGSET_ELT_BITS;
register REGSET_ELT_TYPE bit
= (REGSET_ELT_TYPE) 1 << (regno % REGSET_ELT_BITS);
REGSET_ELT_TYPE all_needed = needed[offset] & bit;
REGSET_ELT_TYPE some_needed = needed[offset] & bit;
REGSET_ELT_TYPE some_not_needed = (~ needed[offset]) & bit;
live[offset] |= bit;
/* A hard reg in a wide mode may really be multiple registers.
If so, mark all of them just like the first. */
if (regno < FIRST_PSEUDO_REGISTER)
@ -2479,14 +2480,13 @@ mark_used_regs (needed, live, x, final, insn)
n = HARD_REGNO_NREGS (regno, GET_MODE (x));
while (--n > 0)
{
live[(regno + n) / REGSET_ELT_BITS]
|= (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS);
some_needed
|= (needed[(regno + n) / REGSET_ELT_BITS]
& (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS));
all_needed
&= (needed[(regno + n) / REGSET_ELT_BITS]
& (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS));
REGSET_ELT_TYPE n_bit
= (REGSET_ELT_TYPE) 1 << ((regno + n) % REGSET_ELT_BITS);
live[(regno + n) / REGSET_ELT_BITS] |= n_bit;
some_needed |= (needed[(regno + n) / REGSET_ELT_BITS] & n_bit);
some_not_needed
|= ((~ needed[(regno + n) / REGSET_ELT_BITS]) & n_bit);
}
}
if (final)
@ -2530,7 +2530,7 @@ mark_used_regs (needed, live, x, final, insn)
we do not make a REG_DEAD note; likewise if we already
made such a note. */
if (! all_needed
if (some_not_needed
&& ! dead_or_set_p (insn, x)
#if 0
&& (regno >= FIRST_PSEUDO_REGISTER || ! fixed_regs[regno])