[LLVMdev] hi, llvm-gcc deal with va_arg() by word alignment.

[任坤]

hi, 
     I am porting llvm to our embedded cpu.
By my abi, long long type is aligned by 8 bytes.
But now llvm-gcc frontend follows x86 abi, generate 
word-alignment LLVM-IR for va_arg().

   In some degree, llvm-gcc frontend depends on targets.
The best solution is llvm-gcc can create va_arg node, 
I can lower it at the backend.

   Who can give a temporary solution to make frontend can 
create 8 byte alignment code for long long type?

Thanks

    renkun.



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