The major changes are:
1) LinkerOptions has been merged into TargetInfo
2) LinkerInvocation has been merged into Driver
3) Drivers no longer convert arguments into an intermediate (core) argument 
   list, but instead create a TargetInfo object and call setter methods on 
   it. This is only how in-process linking would work. That is, you can 
   programmatically set up a TargetInfo object which controls the linking.
4) Lots of tweaks to test suite to work with driver changes
5) Add the DarwinDriver
6) I heavily doxygen commented TargetInfo.h

Things to do after this patch is committed:
a) Consider renaming TargetInfo, given its new roll. 
b) Consider pulling the list of input files out of TargetInfo. This will 
   enable in-process clients to create one TargetInfo the re-use it with 
   different input file lists.
c) Work out a way for Drivers to format the warnings and error done in 
   core linking.

llvm-svn: 178776

ArrayRef<uint8_t>::equals(); lowers to a byte compare loop :(.

TODO: Figure out if we are getting hash collisions, or just have a lot of equal
content. Also test if crypto hashing the content instead of full compare is
better.

llvm-svn: 177588

llvm-svn: 177079

llvm-svn: 176309

llvm-svn: 175983

llvm-svn: 175901

llvm-svn: 174277

llvm-svn: 174107

llvm-svn: 173300

It owns and manages passes.

llvm-svn: 173287

No functionality change.

llvm-svn: 173192

llvm-svn: 173117

constants and string literals which the linker should coalesce.

llvm-svn: 172495

Since most content types (e.g. typeCode) have a 
preferred Permission, add a function to do that mapping.
Then hook up to YAML Reader and Writer such that
the 'permissions:' key does not need to be specified unless
overriding what the content type prefers.

llvm-svn: 171929

llvm-svn: 171916

and adds a new file ReaderWriterYAML.cpp that uses YAML I/O.

Lots of tweaks to test suite for slightly different YAML encoding.

llvm-svn: 171592

llvm-svn: 171531

llvm-svn: 171528

llvm-svn: 169306

llvm-svn: 167394

llvm-svn: 158542

now Reader and Writer subclasses for each file format.  Each Reader and
Writer subclass defines an "options" class which controls how that Reader
or Writer operates.

llvm-svn: 157774

llvm-svn: 157253

llvm-svn: 156143

recursive descent functions into one table driven parser.  Add proper
error recovery and reporting.  Add lots of test cases with semantics errors
and verify error messages.

llvm-svn: 156136

llvm-svn: 155847

llvm-svn: 155846

Add SharedLibraryFile and ArchiveLibraryFile subclasses of File.

Add command line options to lld-core to set various ResolverOptions settings
and added lots of test cases to verify the options work.

llvm-svn: 155183

class.  Change Resolver to no longer use Platform.  Core linking
now issues errors directly.  We need to factor that out later.

Rework how Darwin executable writer finds "main" atom.  It now
adds to core linking an Atom  which has a Reference to "main".  

llvm-svn: 155060

llvm-svn: 154302

llvm-svn: 154301

llvm-svn: 154277

llvm-svn: 154274

llvm-svn: 154246

a hello world executable from atoms.  There is still much to be flushed out.
Added one test case, test/darwin/hello-world.objtxt, which exercises the
darwin platform.

Added -platform option to lld-core tool to dynamically select platform.

llvm-svn: 154242

llvm-svn: 153964

types into the lld namespace.

llvm-svn: 153963

llvm-svn: 153912

llvm-svn: 153677

llvm-svn: 153620