Still problems with alloca and frame layout on w64 targets

[Kai Tietz]

> Hi,
> 
> this small c program produces wrong code on x86_64-pc-mingw32. The 
problem 
> here is the call abi w64. For w64 call abi, the last reserved 32 bytes 
on 
> stack are use for vaarg functions to save the incoming arguments from 
> register. This works fine as long as there is no alloca call within the 
> function calling a vaarg method. The alloca reserves just the stack, but 

> does not move the stack clobber region. So by a vaarg call the last 
> reserved stack is clobbered.
> 
> How and where can I solve this problem?

Sorry I attached wrong testcase

Thanks in advance,
Kai



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