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[Bug middle-end/21134] Make gengenrtl emit mode checks aborting on VOIDmode
- From: "hp at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 23 Apr 2005 15:14:24 -0000
- Subject: [Bug middle-end/21134] Make gengenrtl emit mode checks aborting on VOIDmode
- References: <20050420231406.21134.hp@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From hp at gcc dot gnu dot org 2005-04-23 15:14 -------
In response to comment #2:
Any and all SET_SRC/SET_DEST mode-exceptions must be considered to be added
to genpreds and genrecog as well, for possible omission of the automatically
added mode checks. The sweeping statement humorousely referred to, seems to
be a common delusion, shared with at least those programs. Things don't break
until there's a (match_operand:P "predicate" x) where x is one of those
exceptions (without genpreds/genrecog modified as per const_int).
That then causes the predicate to return false.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21134