Date: Tue, 04 Jun 2002 03:02:21 GMT From: Tor.Egge@cvsup.no.freebsd.org To: bde@zeta.org.au Cc: obrien@FreeBSD.ORG, current@FreeBSD.ORG Subject: Re: memset() broken in gcc-3.1 on i386's Message-ID: <20020604030221G.tegge@cvsup.no.freebsd.org> In-Reply-To: <20020604110707.H1982-100000@gamplex.bde.org> References: <20020604084202.Q939-100000@gamplex.bde.org> <20020604110707.H1982-100000@gamplex.bde.org>
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[-- Attachment #1 --]
> Actually, it broke fsck_ffs.
>
> Workaround to avoid the known broken case:
The brokenness in ix86_expand_clrstr is quite visible when you
compare the function with ix86_expand_movstr.
- Tor Egge
[-- Attachment #2 --]
Index: contrib/gcc/config/i386/i386.c
===================================================================
RCS file: /home/ncvs/src/contrib/gcc/config/i386/i386.c,v
retrieving revision 1.9
diff -u -r1.9 i386.c
--- contrib/gcc/config/i386/i386.c 9 May 2002 22:42:39 -0000 1.9
+++ contrib/gcc/config/i386/i386.c 4 Jun 2002 00:18:49 -0000
@@ -9432,7 +9432,7 @@
gen_rtx_SUBREG (SImode, zeroreg, 0)));
if (TARGET_64BIT && (align <= 4 || count == 0))
{
- rtx label = ix86_expand_aligntest (destreg, 2);
+ rtx label = ix86_expand_aligntest (countreg, 4);
emit_insn (gen_strsetsi (destreg,
gen_rtx_SUBREG (SImode, zeroreg, 0)));
emit_label (label);
@@ -9443,7 +9443,7 @@
gen_rtx_SUBREG (HImode, zeroreg, 0)));
if (align <= 2 || count == 0)
{
- rtx label = ix86_expand_aligntest (destreg, 2);
+ rtx label = ix86_expand_aligntest (countreg, 2);
emit_insn (gen_strsethi (destreg,
gen_rtx_SUBREG (HImode, zeroreg, 0)));
emit_label (label);
@@ -9454,7 +9454,7 @@
gen_rtx_SUBREG (QImode, zeroreg, 0)));
if (align <= 1 || count == 0)
{
- rtx label = ix86_expand_aligntest (destreg, 1);
+ rtx label = ix86_expand_aligntest (countreg, 1);
emit_insn (gen_strsetqi (destreg,
gen_rtx_SUBREG (QImode, zeroreg, 0)));
emit_label (label);
help
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