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From: "wilson at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/31684] [4.3 Regression] ICE in get_attr_first_insn, at config/ia64/itanium2.md:1839 at -O2 Date: Tue, 01 May 2007 00:53:00 -0000 [thread overview] Message-ID: <20070501005328.20000.qmail@sourceware.org> (raw) In-Reply-To: <bug-31684-12387@http.gcc.gnu.org/bugzilla/> ------- Comment #1 from wilson at gcc dot gnu dot org 2007-05-01 01:53 ------- It dies in recog because of an invalid extended asm insn rtl. In an asm with 2 or more outputs, we end up with 2 or more copies of the input vector. These vectors must be shared. They are not in this case. The problem occurs in haifa-sched, in the speculative instruction support. It uses copy_rtx to make a copy of an insn when speculatively scheduling it. However, copy_rtx does not preserve the special sharing semantics of asm operands, so the result is a corrupted insn. There exists a special routine copy_insn to solve this problem. So the solution here is to just replace the copy_rtx call with a copy_insn call. This works on mainline for this testcase but is not otherwise tested. -- wilson at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |wilson at gcc dot gnu dot | |org Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2007-05-01 01:53:27 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31684
next prev parent reply other threads:[~2007-05-01 0:53 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-04-24 15:12 [Bug target/31684] New: " tbm at cyrius dot com 2007-04-30 10:25 ` [Bug target/31684] " pinskia at gcc dot gnu dot org 2007-05-01 0:53 ` wilson at gcc dot gnu dot org [this message] 2007-05-01 0:56 ` wilson at gcc dot gnu dot org 2007-05-09 22:12 ` sje at cup dot hp dot com 2007-06-19 6:39 ` tbm at cyrius dot com 2007-06-29 18:14 ` mmitchel at gcc dot gnu dot org 2007-07-02 17:15 ` sje at gcc dot gnu dot org 2007-07-02 17:16 ` sje at cup dot hp dot com 2008-01-09 19:45 ` wilson at gcc dot gnu dot org
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