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Re: fix scheduling compile time regression
- From: law at redhat dot com
- To: Richard Henderson <rth at redhat dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Thu, 31 Jan 2002 10:45:57 -0700
- Subject: Re: fix scheduling compile time regression
- Reply-to: law at redhat dot com
In message <20020129150020.A8297@redhat.com>, Richard Henderson writes:
> Iterative buildup of the clobber/use lists.
>
> We had a USE of the pic register on the call insn (because the ABI
> requires that we pass it along to the called function). But regclass
> had decided that the pic register wasn't the pic register without
> flag_pic set. So every call insn was listed as both a user and
> clobberer of the pic register.
OK. Probably not the cause of my problems. The PA backend explicitly sets
flag_pic when in 64bit mode (ick). Something to fix one day if we ever care
about the PA64 backend.
jeff