bitwise & optimization

Fisnik Kastrati
Tue Jun 9 13:12:00 GMT 2015

To whom it may concern,

I'm turning to you with regards to an unwanted optimization that g++ (v. 
4.8.2) is generating, see the code in the following link:

The assembly code generated for both methods "amp", "ampamp" is the 
practically the same, when using the optimization flag "-O3". However, 
I'm interested to have a single jump for the code in the method "amp", 
as branch misprediction penalty is very high otherwise. Is there any 
optmization flag that I should set, in order to avoid this feature when 
using "-O3"? I.e., I'd like a generated code similar to icc 13.

Thank you in advance

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