[LLVMdev] [PATCH] Don't optimize out GDB JIT registrar

[Andrew MacPherson]

Hi,

We switched from compiling LLVM with gcc to clang (3.3) and it appears that
clang (correctly I think) optimizes away the GDBRegistrar's
__jit_debug_register_code() function that's used to trigger reading debug
info from JIT-ted code, breaking GDB support.

This patch forces it to leave the call using the method described here in
the 'noinline' section:

http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html

Cheers,
Andrew
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