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

(move_deaths): Handle partial REG_DEAD note for 

multi-reg hard register.

From-SVN: r13836
This commit is contained in:
Jim Wilson 1997-04-03 12:34:07 -08:00
parent 7b05e28661
commit 24e46fc402
1 changed files with 15 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
gcc/combine.c
View File

@ -10800,7 +10800,7 @@ move_deaths (x, maybe_kill_insn, from_cuid, to_insn, pnotes)
if (note != 0 && regno < FIRST_PSEUDO_REGISTER
&& (GET_MODE_SIZE (GET_MODE (XEXP (note, 0)))
!= GET_MODE_SIZE (GET_MODE (x))))
> GET_MODE_SIZE (GET_MODE (x))))
{
int deadregno = REGNO (XEXP (note, 0));
int deadend
@ -10816,18 +10816,28 @@ move_deaths (x, maybe_kill_insn, from_cuid, to_insn, pnotes)
gen_rtx (REG, reg_raw_mode[i], i),
REG_NOTES (where_dead));
}
/* If we didn't find any note, and we have a multi-reg hard
/* If we didn't find any note, or if we found a REG_DEAD note that
covers only part of the given reg, and we have a multi-reg hard
register, then to be safe we must check for REG_DEAD notes
for each register other than the first. They could have
their own REG_DEAD notes lying around. */
else if (note == 0 && regno < FIRST_PSEUDO_REGISTER
else if ((note == 0
|| (note != 0
&& (GET_MODE_SIZE (GET_MODE (XEXP (note, 0)))
< GET_MODE_SIZE (GET_MODE (x)))))
&& regno < FIRST_PSEUDO_REGISTER
&& HARD_REGNO_NREGS (regno, GET_MODE (x)) > 1)
{
int ourend = regno + HARD_REGNO_NREGS (regno, GET_MODE (x));
int i;
int i, offset;
rtx oldnotes = 0;
for (i = regno + 1; i < ourend; i++)
if (note)
offset = HARD_REGNO_NREGS (regno, GET_MODE (XEXP (note, 0)));
else
offset = 1;
for (i = regno + offset; i < ourend; i++)
move_deaths (gen_rtx (REG, reg_raw_mode[i], i),
maybe_kill_insn, from_cuid, to_insn, &oldnotes);
}