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flow.c (mark_set_1): Make not_dead unsigned long.

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* flow.c (mark_set_1): Make not_dead unsigned long.  For
non-pseudos, use it as a bitmask of the hard regs that
don't die.

From-SVN: r39943
This commit is contained in:
Richard Earnshaw 2001-02-21 12:18:11 +00:00 committed by Richard Earnshaw
parent eccad89471
commit 3c88f36654
2 changed files with 13 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2001-02-21 Richard Earnshaw <rearnsha@arm.com>
* flow.c (mark_set_1): Make not_dead unsigned long. For
non-pseudos, use it as a bitmask of the hard regs that
don't die.
2001-02-21 Neil Booth <neil@daikokuya.demon.co.uk>
* cppfiles.c: Update comments.

13
gcc/flow.c
View File

@ -4667,7 +4667,7 @@ mark_set_1 (pbi, code, reg, cond, insn, flags)
int flags;
{
int regno_first = -1, regno_last = -1;
int not_dead = 0;
unsigned long not_dead = 0;
int i;
/* Modifying just one hardware register of a multi-reg value or just a
@ -4698,7 +4698,7 @@ mark_set_1 (pbi, code, reg, cond, insn, flags)
|| GET_CODE (reg) == STRICT_LOW_PART);
if (GET_CODE (reg) == MEM)
break;
not_dead = REGNO_REG_SET_P (pbi->reg_live, REGNO (reg));
not_dead = (unsigned long) REGNO_REG_SET_P (pbi->reg_live, REGNO (reg));
/* Fall through. */
case REG:
@ -4746,7 +4746,8 @@ mark_set_1 (pbi, code, reg, cond, insn, flags)
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD)
< ((GET_MODE_SIZE (inner_mode)
+ UNITS_PER_WORD - 1) / UNITS_PER_WORD))
not_dead = REGNO_REG_SET_P (pbi->reg_live, regno_first);
not_dead = (unsigned long) REGNO_REG_SET_P (pbi->reg_live,
regno_first);
reg = SUBREG_REG (reg);
}
@ -4842,7 +4843,7 @@ mark_set_1 (pbi, code, reg, cond, insn, flags)
{
for (i = regno_first; i <= regno_last; ++i)
if (! mark_regno_cond_dead (pbi, i, cond))
not_dead = 1;
not_dead |= ((unsigned long) 1) << (i - regno_first);
}
#endif
@ -4955,7 +4956,6 @@ mark_set_1 (pbi, code, reg, cond, insn, flags)
/* Mark the register as being dead. */
if (some_was_live
&& ! not_dead
/* The stack pointer is never dead. Well, not strictly true,
but it's very difficult to tell from here. Hopefully
combine_stack_adjustments will fix up the most egregious
@ -4963,7 +4963,8 @@ mark_set_1 (pbi, code, reg, cond, insn, flags)
&& regno_first != STACK_POINTER_REGNUM)
{
for (i = regno_first; i <= regno_last; ++i)
CLEAR_REGNO_REG_SET (pbi->reg_live, i);
if (!(not_dead & (((unsigned long) 1) << (i - regno_first))))
CLEAR_REGNO_REG_SET (pbi->reg_live, i);
}
}
else if (GET_CODE (reg) == REG)