[Bug target/20540] New: "-march=i386" doesn't mean "limit instruction set to what 80386 understands"

["zeev dot tarantov at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

gcc version 3.4.3-20050110 (Gentoo Linux 3.4.3.20050110, ssp-3.4.3.20050110-0,
pie-8.7.7)

Basically, I get P6 instructions in the assembly output when compiling with
"-march=i386", but when I tried "-march=i486" id did the right thing (no P6
instructions).
I hope it is just a simple problem of misunderstanding "i386" to mean something
other than what the documentation (read: man page) says, rather than an actual
bug with the definition of what instructions 386 can and can't issue.
I don't think it's Gentoo's fault so I complain here.

-- 
           Summary: "-march=i386" doesn't mean "limit instruction set to
                    what 80386 understands"
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zeev dot tarantov at gmail dot com
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20540