On 6/19/07, Rask Ingemann Lambertsen <[EMAIL PROTECTED]> wrote:
> 3) If they really are uninitialized, why is it a problem to assign zero > to them. It is possible to mess up the substitution that the vregs pass performs. IIRC, it happened to me once because I accidentally put one of these virtual pseudo inside a (clobber) or (use) or something like that. I don't quite recall the details, but maybe the substitution fails if they appear outside an operand?
There is one annoying case in PR32374, where on-the-stack constructor creates invalid memory clobber that includes virtual-stack-regs. These are simply ignored by vregs pass and this confuses dataflow register initialization. Uros.
