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

combine.c (distribute_notes): Place REG_LABEL also where REG_EQUAL indicates.

Browse Source 
* combine.c (distribute_notes): Place REG_LABEL also where
        REG_EQUAL indicates.

From-SVN: r25984
This commit is contained in:
Richard Henderson 1999-03-25 08:54:31 -08:00 committed by Richard Henderson
parent cc29143343
commit e55b448636
2 changed files with 29 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
Thu Mar 25 16:53:53 1999 Richard Henderson <rth@cygnus.com>
* combine.c (distribute_notes): Place REG_LABEL also where
REG_EQUAL indicates.
Thu Mar 25 12:46:37 1999 Jim Wilson <wilson@cygnus.com>
* a29k/a29k.h (TARGET_SWITCHES): Add doc strings.

25
gcc/combine.c
View File

@ -11508,7 +11508,6 @@ distribute_notes (notes, from_insn, i3, i2, elim_i2, elim_i1)
case REG_INC:
case REG_NO_CONFLICT:
case REG_LABEL:
/* These notes say something about how a register is used. They must
be present on any use of the register in I2 or I3. */
if (reg_mentioned_p (XEXP (note, 0), PATTERN (i3)))
@ -11523,6 +11522,30 @@ distribute_notes (notes, from_insn, i3, i2, elim_i2, elim_i1)
}
break;
case REG_LABEL:
/* This can show up in several ways -- either directly in the
pattern, or hidden off in the constant pool with (or without?)
a REG_EQUAL note. */
/* ??? Ignore the without-reg_equal-note problem for now. */
if (reg_mentioned_p (XEXP (note, 0), PATTERN (i3))
|| ((tem = find_reg_note (i3, REG_EQUAL, NULL_RTX))
&& GET_CODE (XEXP (tem, 0)) == LABEL_REF
&& XEXP (XEXP (tem, 0), 0) == XEXP (note, 0)))
place = i3;
if (i2
&& (reg_mentioned_p (XEXP (note, 0), PATTERN (i2))
|| ((tem = find_reg_note (i2, REG_EQUAL, NULL_RTX))
&& GET_CODE (XEXP (tem, 0)) == LABEL_REF
&& XEXP (XEXP (tem, 0), 0) == XEXP (note, 0))))
{
if (place)
place2 = i2;
else
place = i2;
}
break;
case REG_WAS_0:
/* It is too much trouble to try to see if this note is still
correct in all situations. It is better to simply delete it. */