Re: open64 versus gcc

> >For alias analysis, GCC uses a fairly sophisticated constraint-based
> >points-to analysis and complements it with type-based disambiguation.


I believe Open64 basically claims the same features. Comparing
superficial feature lists from compilers will rarely teach you much;
it's much more interesting to see how well the compiler does on
benchmarks or your favorite application.


> One of the feature out of the list of "rich features" is that the
> results of numerical computations (such as inverting large matrix or
> solving large set of linear equations) strongly depends on activated
> options, especially optimization level.


Can you name a modern optimizing compiler for which this statement
*isn't* true? I don't think there are any. If you want results which
are the same every time, most compilers list additional flags in their
documentation which inhibit optimizations that change the answer.
Almost all numerically intensive number crunching doesn't use those
flags.


-- greg
[employed by, not speaking for, QLogic Corporation]

Return to the comp.compilers page.
Search the comp.compilers archives again.