[LLVMdev] Destination register needs to be valid after callee saved register restore when tail calling

[Arnold Schwaighofer]

refrain i will from the dark side of following the path of dagcombine,
follow the wise advice of llvm master anton and  custom lower the  
tail call i shall,
follow the force of custom lowering the 'tail call return' i will  
until a greater plan is decided by the high council


thanks for your help,
regards young llvm padawan arnold ;)

On 9 Aug 2007, at 11:06, Evan Cheng wrote:

>
> Hmm. Seems like somthing else is wrong. The register allocator is free
> to use a callee saved register to store the function ptr provided it's
> not live. It's likely your lowering code isn't setting up things
> properly.
>
> Anyway, I am pretty sure target specific dag combiner isn't the right
> way to implement tail call. We wanted something more general. Since
> there seems to be interests in this. Perhaps this is a good time to
> formula a plan. I'll talk to Chris about this.
>