[LLVMdev] Convert C variable to LLVM IR Variable
h3355626 at msn.com
Tue Mar 5 00:21:53 PST 2013
I am doing some work with LLVM IR, I need to use LLVM IR to do operation
on C variables.
Code emission is done by LLVM JIT.
That variable is C thread local , for example
__thread int* gvar;
I think some methods to convert that variable to LLVM IR,
(1) use external function
I know LLVM IR is able to call an external function, so I can write codes
that look like:
%x = call load(); // LLVM IR
so gvar is converted to %x
This method takes a lot of work and slow down the performance.
use LLVM InlineAsm to load that gvar
so It may look like
%x = call InlineAsm(... );
but I am not really sure how to write LLVM InlineAsm.
The reason why I take such indirect method is that as I know, JIT is not
do with LLVM GlobalVariable with ThreadLocal type.
I would be grateful to you for any idea on handling this problem
Have A Nice Day
Chia Lun Liu
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