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Re: optimization/8110: GCC 3.2: wrong code optimization with -O2
- From: rth at gcc dot gnu dot org
- To: dyatchkov at mcst dot ru, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, nobody at gcc dot gnu dot org
- Date: 1 Oct 2002 21:19:01 -0000
- Subject: Re: optimization/8110: GCC 3.2: wrong code optimization with -O2
- Reply-to: rth at gcc dot gnu dot org, dyatchkov at mcst dot ru, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, nobody at gcc dot gnu dot org, gcc-gnats at gcc dot gnu dot org
Synopsis: GCC 3.2: wrong code optimization with -O2
State-Changed-From-To: open->closed
State-Changed-By: rth
State-Changed-When: Tue Oct 1 14:19:00 2002
State-Changed-Why:
The code in rtx_alloc is broken in spec2k. Use the following.
--- rtl.c.orig Tue Oct 1 14:16:34 2002
+++ rtl.c Tue Oct 1 14:17:35 2002
@@ -234,9 +234,7 @@
one int, but we don't want to assume that and it isn't very portable
anyway; this is. */
- length = (sizeof (struct rtx_def) - sizeof (rtunion) - 1) / sizeof (int);
- for (; length >= 0; length--)
- ((int *) rt)[length] = 0;
+ memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion));
PUT_CODE (rt, code);
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8110