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[Bug tree-optimization/31169] Bootstrap comparison error at revision 122821
- From: "rth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Mar 2007 16:30:49 -0000
- Subject: [Bug tree-optimization/31169] Bootstrap comparison error at revision 122821
- References: <bug-31169-276@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #33 from rth at gcc dot gnu dot org 2007-03-29 17:30 -------
I've been trying to track down this same failure on Alpha. I can reproduce
that
reverting the third hunk allows the bootstrap to complete. Finding what has
got
miscompiled has been very difficult. Only two files compile differently:
fold-const.c and tree.c.
Unfortunately, a function early in fold-const.c gets compiled differently
legitimately -- sign_bit_p actually benefits from the optimization -- and
all the functions after that differ in decl_uid numbers, which completely
obscures the rest of the changes.
I'll keep searching...
--
rth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2007-03-14 20:03:38 |2007-03-29 17:30:45
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31169