Debug info: Remove ARMAsmPrinter::EmitDwarfRegOp(). AsmPrinter can now
scan the register file for sub- and super-registers.
No functionality change intended.

(Tests are updated because the comments in the assembler output are
different.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202416 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r201751 and solve the const problem a different way - by
making the cache mutable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202417 91177308-0d34-0410-b5e6-96231b3b80d8
Add getter method to access Reloc::Model.

Some MC components like Target Streamers or Assembly Parsers
may need to access the relocation model in order to expand
some directives and/or assembly macros.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202418 91177308-0d34-0410-b5e6-96231b3b80d8