Add a func_addr instruction.

Get the callable address of a function. Use for long distance calls and
for creating arguments to call_indirect in general.

lib/cretonne/meta/base/formats.py

@@ -49,6 +49,7 @@ BranchTable = InstructionFormat(VALUE, entities.jump_table)
 
 Call = InstructionFormat(func_ref, VARIABLE_ARGS)
 IndirectCall = InstructionFormat(sig_ref, VALUE, VARIABLE_ARGS)
+FuncAddr = InstructionFormat(func_ref)
 
 Load = InstructionFormat(memflags, VALUE, offset32)
 Store = InstructionFormat(memflags, VALUE, VALUE, offset32)