Add LANGUAGE pragmas to compiler/ source files

In some cases, the layout of the LANGUAGE/OPTIONS_GHC lines has been
reorganized, while following the convention, to

- place `{-# LANGUAGE #-}` pragmas at the top of the source file, before
  any `{-# OPTIONS_GHC #-}`-lines.

- Moreover, if the list of language extensions fit into a single
  `{-# LANGUAGE ... -#}`-line (shorter than 80 characters), keep it on one
  line. Otherwise split into `{-# LANGUAGE ... -#}`-lines for each
  individual language extension. In both cases, try to keep the
  enumeration alphabetically ordered.
  (The latter layout is preferable as it's more diff-friendly)

While at it, this also replaces obsolete `{-# OPTIONS ... #-}` pragma
occurences by `{-# OPTIONS_GHC ... #-}` pragmas.

1 files changed, 2 insertions, 3 deletions

diff --git a/compiler/llvmGen/LlvmCodeGen/CodeGen.hs b/compiler/llvmGen/LlvmCodeGen/CodeGen.hs
index 1140145d4d..342b94f93f 100644
--- a/compiler/llvmGen/LlvmCodeGen/CodeGen.hs
+++ b/compiler/llvmGen/LlvmCodeGen/CodeGen.hs
@@ -1,9 +1,8 @@
-{-# OPTIONS -fno-warn-type-defaults #-}
+{-# LANGUAGE CPP, GADTs #-}
+{-# OPTIONS_GHC -fno-warn-type-defaults #-}
 -- ----------------------------------------------------------------------------
 -- | Handle conversion of CmmProc to LLVM code.
 --
-
-{-# LANGUAGE GADTs #-}
 module LlvmCodeGen.CodeGen ( genLlvmProc ) where
 
 #include "HsVersions.h"