Re: [PATCH] ppc: Fix 'calli' when floating-point arguments are passed

[Paul Cercueil]

Hi Paulo,
[...]

> >  About the "call" check, I didn't debug it yet, but it may be 
> > related to
> >  calling "near" code as well. I had to use the following temporary
> >  workaround in my code to avoid crashes:
> >  https://github.com/pcercuei/lightrec/blob/master/emitter.c#L35-L47
>
>   This is strange. check/*.tst is full of forward and backward jumps.
> Not just call.tst has them. But call.tst has a few forward/backward
> tests of calls and jumps. Unless the can_sign_extend_jump_p() macro
> has some bug in the displacement test, and  was never experienced
> in the tests.

What happens is I have a pointer that I keep in the last JIT_V() 
register, and the jit_jmpi() call uses the same register as a temporary.

Adding a jit_live() right before the jit_jmpi() fixes it, but it makes 
me wonder why Lightning considered it okay to use this register in the 
first place.

Cheers,
-Paul