This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug rtl-optimization/56571] [4.7/4.8 Regression] ICE in copyprop_hardreg_forward_1, at regcprop.c (insn does not satisfy its constraints !)
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 08 Mar 2013 16:06:33 +0000
- Subject: [Bug rtl-optimization/56571] [4.7/4.8 Regression] ICE in copyprop_hardreg_forward_1, at regcprop.c (insn does not satisfy its constraints !)
- Auto-submitted: auto-generated
- References: <bug-56571-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56571
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-03-08 16:06:33 UTC ---
Ok, it seems to be caused by rtl sharing of the clobber, which has been
introduced by Honza: http://gcc.gnu.org/ml/gcc-patches/2004-01/msg01918.html
Honza is going to try sharing only clobbers of hard regs that don't have
ORIGINAL_REGNO set on them and disallow sharing anything else (plus copy it on
copy_rtx etc.).