[PATCH] D17390: Introduce -fembed-bitcode driver option

[Steven Wu via cfe-commits]

steven_wu created this revision.
steven_wu added a subscriber: cfe-commits.

This is the clang driver part of the change to embedded bitcode. This
includes:
1. -fembed-bitcode option which breaks down the compilation into two
stages. The first stage emits optimized bitcode and the second stage
compiles bitcode into object file.
2. -fembed-bitcode-marker option which doesn't really break down to
two stages to speedup the compilation flow.
3. pass the correct linker flag to darwin linker if tool chains supports
embedded bitcode.

http://reviews.llvm.org/D17390

Files:
  include/clang/Basic/DiagnosticDriverKinds.td
  include/clang/Driver/Driver.h
  include/clang/Driver/Options.td
  include/clang/Driver/ToolChain.h
  lib/Driver/Driver.cpp
  lib/Driver/ToolChains.cpp
  lib/Driver/ToolChains.h
  lib/Driver/Tools.cpp
  test/Driver/embed-bitcode.c

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