This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug middle-end/48973] [4.3/4.4/4.5/4.6/4.7 Regression] Inliner bug with one-bit (1-bit) bitfield
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 12 May 2011 10:13:56 +0000
- Subject: [Bug middle-end/48973] [4.3/4.4/4.5/4.6/4.7 Regression] Inliner bug with one-bit (1-bit) bitfield
- Auto-submitted: auto-generated
- References: <bug-48973-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48973
--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-05-12 09:00:59 UTC ---
"Fixed" with bitfield lowering where we expand from
v.0_1 = v;
BF.1_3 = MEM[(struct S *)&s];
D.2700_4 = BF.1_3 & -2;
D.2702_6 = v.0_1 < 0;
BF.1_7 = D.2702_6 | D.2700_4;
MEM[(struct S *)&s] = BF.1_7;
D.2693_9 = (<unnamed-signed:1>) BF.1_7;
D.2694_10 = (unsigned int) D.2693_9;
if (D.2694_10 != 4294967295)
similar to what Jakub proposed to do manually.