search for: my_forwarding_thunk

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2014 Sep 02
2
[LLVMdev] PSA: Perfectly forwarding thunks can now be expressed in LLVM IR with musttail and varargs
I needed this functionality to solve http://llvm.org/PR20653, but it obviously has far more general applications. You can do it like this: define i32 @my_forwarding_thunk(i32 %arg1, i8* %arg2, ...) { ... ; define new_arg1 and new_arg2 %r = musttail call i32 (i32, i8*, ...)* @the_true_target(i32 %new_arg1, i8* %new_arg2, ...) ret i32 %r } declare i32 @the_true_target(i32, i8*, ...) The varargs convention (usually) matches the standard function call convention,...