[PATCH] LTO: introduce object file-based on-disk module format.

[Rafael Ávila de Espíndola]

LGTM with a nit.

================
Comment at: test/tools/gold/bcsection.ll:5
@@ +4,3 @@
+; RUN: ld -r -o %T/bcsection.o -plugin %llvmshlibdir/LLVMgold.so %T/bcsection.bco
+; RUN: llvm-nm -no-llvm-bc %T/bcsection.o | FileCheck %s
+
----------------
Since the intention is to check that %T/bcsection.o is not just a copy of %T/bcsection.bco, how about extending this to:

llvm-nm -no-llvm-bc %T/bcsection.bco | FileCheck %s --check-prefix=NO-MAIN
lvm-nm  %T/bcsection.bco | FileCheck %s
lvm-nm  %T/bcsection.o| FileCheck %s

?

http://reviews.llvm.org/D4371