[Driver][OpenMP] Add logic for offloading-specific argument translation.

[sfantao]

Summary

This patch includes support for argument translation that is specific of a given offloading kind. Additionally, it implements the translation for OpenMP device kinds in the gcc tool chain.

With this patch, it is possible to compile a functional OpenMP application with offloading capabilities with no separate compilation.

[ABataev]

include/clang/Driver/Compilation.h

71

1. 'final'
2. default initializers for fields.

208

'const' function?

lib/Driver/Compilation.cpp

39–40

for(auto &Arg : TCArgs)

[sfantao]

• Add default initializers to toolchain arguments key and use range based iterator in Dtor.

[sfantao]

Hi Alexey,

Thanks for the review!

include/clang/Driver/Compilation.h

71

I added the default initializers but that required me to add a Ctor so that initializer lists work when this struct is built.

208

This one can't be marked const has it potentially changes the cache of translated arguments.

[sfantao]

• Rebase.

[sfantao]

• Rebase.

[sfantao]

• Rebase.

[ABataev]

LG

[hfinkel]

lib/Driver/ToolChains.cpp

2840

regardless the -> regardless of the

2842

requires to load -> is required to load

2860

And also?

case options::OPT_dynamic:

[sfantao]

• Fix typos and check -dynamic when it comes to translating arguments for offloading gcc toolchains.

[sfantao]

Hi Hal,

Thanks for the review!

lib/Driver/ToolChains.cpp

2860

Oh, yes, that one too! Thanks!

[hfinkel]

LGTM