Optimising logical expressions

[Terry Frankcombe]

With gfortran/gcc, is there a significant difference in the code the
optimiser produces from:

if (A.and.B) ...

and

if (A) then
  if (B) ...
endif

?

(No, I'm not trying to avoid an invalid B.  I'm curious about the case
where B is expensive.)

Ciao
Terry


-- 
Dr Terry Frankcombe
Physical Chemistry, Department of Chemistry
Göteborgs Universitet
SE-412 96 Göteborg Sweden
Ph: +46 76 224 0887   Skype: terry.frankcombe
<terry@chem.gu.se>