Merge pull request #315 from JuliaGPU/tb/finish

Add a hook to post-process all IR.

Author: maleadt

src/driver.jl

@@ -358,6 +358,8 @@ const __llvm_initialized = Ref(false)
             end
         end
 
+        entry = finish_ir!(job, ir, entry)
+
         # replace non-entry function definitions with a declaration
         # NOTE: we can't do this before optimization, because the definitions of called
         #       functions may affect optimization.

src/interface.jl

@@ -228,7 +228,7 @@ end
 # post-Julia optimization processing of the module
 optimize_module!(@nospecialize(job::CompilerJob), mod::LLVM.Module) = return
 
-# final processing of the IR module, right before validation and machine-code generation
+# finalization of the module, before deferred codegen and optimization
 function finish_module!(@nospecialize(job::CompilerJob), mod::LLVM.Module, entry::LLVM.Function)
     ctx = context(mod)
     entry_fn = LLVM.name(entry)
@@ -241,6 +241,11 @@ function finish_module!(@nospecialize(job::CompilerJob), mod::LLVM.Module, entry
     return functions(mod)[entry_fn]
 end
 
+# final processing of the IR, right before validation and machine-code generation
+function finish_ir!(@nospecialize(job::CompilerJob), mod::LLVM.Module, entry::LLVM.Function)
+    return entry
+end
+
 add_lowering_passes!(@nospecialize(job::CompilerJob), pm::LLVM.PassManager) = return
 
 link_libraries!(@nospecialize(job::CompilerJob), mod::LLVM.Module,