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