RFC - COST of const_double for x86 prevents constant copy propagation in cse

[Andrew Pinski]

On Aug 25, 2005, at 3:59 PM, Fariborz Jahanian wrote:

>> I think the problem may be somewhere else. I got the same xmm0 code
>> sequence on Linux/ia32 with -msse3 -mfpmath=sse. However, I got
>>
>>         xorl    %eax, %eax
>>         movq    %rax, 16(%rdi)
>>         movq    %rax, 8(%rdi)
>>         movq    %rax, (%rdi)
>
> Can you try this with -march=pentium4

pentium4 is not the arch which supports 64bit, it is Nocoa which is a 
different
core than the orginal pentium4 which is what is meant by pentium4 here.

Also for x86/64, we have 64bit registers so using the integer registers 
is nice.

-- Pinski