[LLVMdev] function inlining threshold ?

[Long Fei]

I am using llvm for source-to-source inlining. So I did:

% llvm-gcc file_a.c file_b.c ... file_n.c -o file
% opt -inline -inline-threshold=1000 < file.bc | llc -march=c > outfile.c

Can anyone tell me how llvm determines if a function should be inlined, 
and what roll does "inline-threshold" play ? (Does the example mean that 
if the function body has fewer than 1000 instructions, then it should be 
inlined ?)

thanks,
--Long