Re: PPro and egcs

[hjl at lucon dot org (H.J. Lu)]

>   > >From what I saw, gcc wound up trying to put those operands into
>   > registers to satisfy the constraints, which caused the register
>   > shortage.
> No, there was a const_int in the original example, which caused gcc to
> try and use the last constraint, which didn't work because the clobber
> was teh same as one of the input registers.
> 
> If you fix the pattern to only use two registers (remember there's a
> matching in/out) then it shouldn't be any more register pressure
> sensitive than any other two operand instruction.
> 

I tried it. gcc will then to put const_int in register to fit the
pattern. I got the same error on _bb.o in libgcc2.a.

-- 
H.J. Lu (hjl@gnu.ai.mit.edu)