mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-04-05 13:51:00 +08:00
Code Issues Packages Projects Releases Wiki Activity

combine.c (distribute_notes): When re-distributing the notes from an insn we are about to delete...

Browse Source 
* combine.c (distribute_notes): When re-distributing the notes from
an insn we are about to delete, ensure we can't end up with a cyclic
list of notes.

From-SVN: r73547
This commit is contained in:
Richard Earnshaw 2003-11-13 14:05:55 +00:00 committed by Richard Earnshaw
parent 650dc9b332
commit f9af39d0c7
2 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2003-11-13 Richard Earnshaw <rearnsha@arm.com>
* combine.c (distribute_notes): When re-distributing the notes from
an insn we are about to delete, ensure we can't end up with a cyclic
list of notes.
2003-11-13 Eric Botcazou <ebotcazou@libertysurf.fr>
PR optimization/12926

12
gcc/combine.c
View File

@ -12702,11 +12702,12 @@ distribute_notes (rtx notes, rtx from_insn, rtx i3, rtx i2)
This might delete other dead insns recursively.
First set the pattern to something that won't use
any register. */
rtx old_notes = REG_NOTES (tem);
PATTERN (tem) = pc_rtx;
REG_NOTES (tem) = NULL;
distribute_notes (REG_NOTES (tem), tem, tem,
NULL_RTX);
distribute_notes (old_notes, tem, tem, NULL_RTX);
distribute_links (LOG_LINKS (tem));
PUT_CODE (tem, NOTE);
@ -12718,10 +12719,11 @@ distribute_notes (rtx notes, rtx from_insn, rtx i3, rtx i2)
if (cc0_setter)
{
PATTERN (cc0_setter) = pc_rtx;
old_notes = REG_NOTES (cc0_setter);
REG_NOTES (cc0_setter) = NULL;
distribute_notes (REG_NOTES (cc0_setter),
cc0_setter, cc0_setter,
NULL_RTX);
distribute_notes (old_notes, cc0_setter,
cc0_setter, NULL_RTX);
distribute_links (LOG_LINKS (cc0_setter));
PUT_CODE (cc0_setter, NOTE);