[Bug target/41462] redundant instructions with long double returned value

[ubizjak at gmail dot com]

------- Comment #2 from ubizjak at gmail dot com  2009-09-25 08:04 -------
(In reply to comment #0)

> There are two redundant FPU instructions there. double value is already in FPU
> after fldt. No need to store it and load it back since difference between
> double and long double is only in memory representation, and in FPU registers
> they are the same.

No, they are not. These instructions implement FP truncation from long-double
to double.  Try to compile your code with -ffast-math.


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41462