[Bug target/30936] __builtin_nanf("") != __builtin_nanf("") is false for sh4-linux-gnu

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2007-02-26 09:52 -------
>In attach you can find the nanf-test.s that doesn't contains any reference 
> to nanf symbol.

That is ok, because nanf("") is foldded into a constant and the function is not
called.
I don't read sh asm that well but it looks like:
        mov     #0,r1

is wrong, it should be instead:
mov #1, r1


If I changed nanf(") to __builtin_nanf("") on powerpc-darwin, I get:
        li r0,1
        stw r0,56(r30)
        lwz r0,56(r30)
        cmpwi cr7,r0,0

So it is doing the correct thing there.

So this still has nothing to do with the nanf prototype really.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|const attribute in nanf     |__builtin_nanf("") !=
                   |prototype causes gcc not    |__builtin_nanf("") is false
                   |producing correct code.     |for sh4-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30936