This removes a bunch of llvm_unreachables and makes a File's mutability part of the type system.

llvm-svn: 172297

llvm-svn: 172266

llvm-svn: 172265

llvm-svn: 172264

llvm-svn: 172255

llvm-svn: 172236

llvm-svn: 172204

llvm-svn: 172202

With this change c++ global constructors and destructors work.

llvm-svn: 172133

llvm-svn: 172131

llvm-svn: 172080

llvm-svn: 172040

[Archive] Use a hash map to lookup symbols in archives. Increases performance of linking lua by ~6x.

llvm-svn: 172028

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: 171918

llvm-svn: 171916

There is no way to test this at the moment because the options are not
processed until the link starts, and we can't pass an empty file.

llvm-svn: 171910

llvm-svn: 171909

llvm-svn: 171898

llvm-svn: 171836

llvm-svn: 171835

With this hello world works with dietlibc on x86-64 Linux.

llvm-svn: 171711

llvm-svn: 171710

This is required for the loader to correctly set AT_PHDR.

With this lld can correctly link against dietlibc and get to main.

llvm-svn: 171709

llvm-svn: 171708

llvm-svn: 171707

llvm-svn: 171704

llvm-svn: 171703

llvm-svn: 171693

llvm-svn: 171692

llvm-svn: 171652

llvm-svn: 171645

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: 171591

llvm-svn: 171578

llvm-svn: 171577

This will be tested by a following committ that runs the linker
with no inputs.

llvm-svn: 171576

llvm-svn: 171575

llvm-svn: 171557

llvm-svn: 171533