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[Bug target/46716] [4.3/4.4/4.5/4.6 Regression] bad code generated with -mno-sse2 -m64
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 5 Dec 2010 12:03:32 +0000
- Subject: [Bug target/46716] [4.3/4.4/4.5/4.6 Regression] bad code generated with -mno-sse2 -m64
- Auto-submitted: auto-generated
- References: <bug-46716-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46716
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-12-05 12:03:09 UTC ---
For sake of the ABI we either need to ignore -mno-sse2 for calling conventions
or non-silently fail, best with sorry ("cannot use SSE argument passing without
SSE registers") or similar. If we ignore -mno-sse2 for arguments we probably
have to at least allow spilling SSE regs to memory with all the fun
side-effects.
I don't think this is actually a "regression", just a failure to diagnose
-mno-sse[2] problems from the start.
>From ml discussion this is an accepts-invalid bug.
Leaving at P3 for now.