On 2008-12-01 13:02:21 -0800, Ian Lance Taylor wrote: > "Nirav Shah" <nirav4ever4u@xxxxxxxxx> writes: > > > No expression is evaluated in loop nor any particular intermediate > > result is used more than once. Given this, can I get benefit in terms > > of lesser clock cycle to execute the computation if done in a single > > statement as compared to done over multiple statements with local > > variables? > > No. When optimizing, the compiler converts your program into an > internal representation in SSA form. The number of local variables > used in the original program is irrelevant to the generated code. This may be what GCC currently does, but this is a bug when extended precision is used to evaluate an expression. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323 -- Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <http://www.vinc17.org/> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/> Work: CR INRIA - computer arithmetic / Arenaire project (LIP, ENS-Lyon)
