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[Bug middle-end/33029] [4.3 Regression] libgcc2.c:1890: internal compiler error: in local_cprop_pass, at gcse.c:3236
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 14 Aug 2007 21:34:54 -0000
- Subject: [Bug middle-end/33029] [4.3 Regression] libgcc2.c:1890: internal compiler error: in local_cprop_pass, at gcse.c:3236
- References: <bug-33029-276@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from steven at gcc dot gnu dot org 2007-08-14 21:34 -------
r127273 is this patch: http://gcc.gnu.org/ml/gcc-cvs/2007-08/msg00165.html
My initial reaction was, "What happens to the REG_RETVAL note, if the insn with
the REG_LIBCALL note?" I don't know what happens with the REG_LIBCALL note,
but if it disappears with the insn that's being deleted, then you should also
remove the REG_RETVAL note, or you're creating something that will look like
nested libcalls (which gcse.c handles, but they're actually not allowed).
So, can you check what happens with the REG_RETVAL note, please?
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33029