[src/trunk]: src/doc document fsdb bug

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/31f745e36ca2
branches:  trunk
changeset: 791229:31f745e36ca2
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Nov 09 16:05:39 2013 +0000

description:
document fsdb bug

diffstat:

 doc/HACKS |  18 +++++++++++++++++-
 1 files changed, 17 insertions(+), 1 deletions(-)

diffs (32 lines):

diff -r c3d31a742397 -r 31f745e36ca2 doc/HACKS
--- a/doc/HACKS Sat Nov 09 16:01:58 2013 +0000
+++ b/doc/HACKS Sat Nov 09 16:05:39 2013 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: HACKS,v 1.139 2013/11/09 00:35:00 christos Exp $
+# $NetBSD: HACKS,v 1.140 2013/11/09 16:05:39 christos Exp $
 #
 # This file is intended to document workarounds for currently unsolved
 # (mostly) compiler bugs.
@@ -517,6 +517,22 @@
                Many filesystem on-disk formats have 32 bit times.
        kcah
 
+       hack    gcc >= 4.5 fsdb miscompile
+       date    Sat Nov  9 11:03:02 EST 2013
+       who     christos
+       file    src/sbin/fsdb/Makefile : 1.35 (and earlier)
+       descr
+               src/sbin/fsdb/fsdb.c: In function 'findblk':
+               src/sbin/fsdb/fsdb.c:610:1: error: unrecognizable insn:
+               (insn 941 940 942 134 src/sbin/fsdb/fsdb.c:589 (set (reg:SI 604)
+                   (subreg:SI (mem/s/j:DI (plus:SI (mult:SI (reg:SI 602)
+                        (const_int 8 [0x8]))
+                    (reg/f:SI 601)) [0 curinode.99_378->dp2.di_ib S8 A32]) 4)) \
+                       -1 (nil))
+               src/sbin/fsdb/fsdb.c:610:1: internal compiler error: in \
+               extract_insn, at recog.c:2103
+       kcah
+
 port   arm
 
        hack    gcc-unsigned-compare