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[Bug target/29825] [4.1 regression] ICE in extract_insn, at recog.c:2084
- From: "jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 15 Nov 2006 07:37:52 -0000
- Subject: [Bug target/29825] [4.1 regression] ICE in extract_insn, at recog.c:2084
- References: <bug-29825-5724@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #20 from jakub at gcc dot gnu dot org 2006-11-15 07:37 -------
Looking at i386 backend, also (const (plus (unspec (something)) (const_int)))
is special (a whole bunch of routines rely on the unspec being surrounded
by CONST, optionally with a PLUS in there).
Not sure if make_tree should try to fallback whenever it sees this too
(safer option), or if it e.g. can return dummy VAR_DECL
with (const (unspec (something))) plus the constant.
An, other backends need auditing what exactly they do with CONST.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29825