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[Bug inline-asm/42214] gcc generates broken code with -O>=1 for x86_64 after an asm call
- From: "rguenth 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 Nov 2009 13:03:37 -0000
- Subject: [Bug inline-asm/42214] gcc generates broken code with -O>=1 for x86_64 after an asm call
- References: <bug-42214-17449@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from rguenth at gcc dot gnu dot org 2009-11-29 13:03 -------
well,
asm("bswap %0" : "=q"(i) : "q"(i));
is wrong. You probably want
asm("bswap %0" : "=q"(i) : "0"(i));
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42214