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Remove last combine patch. rth & jim are working on a new one. 

From-SVN: r16304
This commit is contained in:
Jeff Law 1997-11-03 14:55:49 -07:00
parent f6857708b8
commit 08bb4b3b2c
2 changed files with 4 additions and 17 deletions
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9
gcc/ChangeLog
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@ -8,15 +8,6 @@ Sun Nov 2 23:31:43 1997 Manfred Hollstein <manfred@s-direktnet.de>
14 char length.
* configure: Rebuild.
Sun Nov 2 23:21:36 1997 Richard Henderson <rth@cygnus.com>
Jim Wilson <wilson@cygnus.com>
* combine.c (try_combine): Don't elim_i1 when it is used in i2src.
* combine.c (try_combine): When setting elim_i2, check whether newi2pat
sets i2dest. When calling distribute_notes for i3dest_killed, pass
elim_i2 and elim_i1.
Sun Nov 2 19:44:00 1997 Robert Lipe (robertl@dgii.com)
* i386/sco5.h: enable -gstabs once again.

12
gcc/combine.c
View File

@ -1240,7 +1240,6 @@ try_combine (i3, i2, i1)
rtx i2pat;
/* Indicates if I2DEST or I1DEST is in I2SRC or I1_SRC. */
int i2dest_in_i2src = 0, i1dest_in_i1src = 0, i2dest_in_i1src = 0;
int i1dest_in_i2src = 0;
int i1_feeds_i3 = 0;
/* Notes that must be added to REG_NOTES in I3 and I2. */
rtx new_i3_notes, new_i2_notes;
@ -1424,7 +1423,6 @@ try_combine (i3, i2, i1)
i2dest_in_i2src = reg_overlap_mentioned_p (i2dest, i2src);
i1dest_in_i1src = i1 && reg_overlap_mentioned_p (i1dest, i1src);
i2dest_in_i1src = i1 && reg_overlap_mentioned_p (i2dest, i1src);
i1dest_in_i2src = i1 && reg_overlap_mentioned_p (i1dest, i2src);
/* See if I1 directly feeds into I3. It does if I1DEST is not used
in I2SRC. */
@ -2148,12 +2146,10 @@ try_combine (i3, i2, i1)
rtx i3links, i2links, i1links = 0;
rtx midnotes = 0;
register int regno;
/* Compute which registers we expect to eliminate. newi2pat may be setting
either i3dest or i2dest, so we must check it. */
rtx elim_i2 = ((newi2pat && reg_set_p (i2dest, newi2pat))
|| i2dest_in_i2src || i2dest_in_i1src
/* Compute which registers we expect to eliminate. */
rtx elim_i2 = (newi2pat || i2dest_in_i2src || i2dest_in_i1src
? 0 : i2dest);
rtx elim_i1 = i1 == 0 || i1dest_in_i1src || i1dest_in_i2src ? 0 : i1dest;
rtx elim_i1 = i1 == 0 || i1dest_in_i1src ? 0 : i1dest;
/* Get the old REG_NOTES and LOG_LINKS from all our insns and
clear them. */
@ -2321,7 +2317,7 @@ try_combine (i3, i2, i1)
distribute_notes (gen_rtx (EXPR_LIST, REG_DEAD, i3dest_killed,
NULL_RTX),
NULL_RTX, i3, newi2pat ? i2 : NULL_RTX,
elim_i2, elim_i1);
NULL_RTX, NULL_RTX);
}
if (i2dest_in_i2src)