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Re: PATCH: PR target/40470: unabl e to find a register to spill in class ‘SSE_FIRST_REG’


Richard Guenther wrote:
On Wed, Jun 17, 2009 at 4:01 PM, H.J. Lu<hongjiu.lu@intel.com> wrote:
Hi,

Some SSE4 instructions have implicit XMM0 operand. This patch helps RA
deal with them by forcing operand into XMM0 during expand. OK for trunk
and 4.4?

I don't think it's a particularly good idea to put things in hardregs
that early.
Agreed. In fact, it can have horrific performance impacts.

jeff


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