Remove the old file memory mapping functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183828 91177308-0d34-0410-b5e6-96231b3b80d8

[PowerPC] Use assembler source in MC tests

A couple of old test cases in test/MC/PowerPC were still using
LLVM IR.  Now that we have a working assembler, we can move
them to assembler tests instead:
  ppc64-initial-cfa.ll
  ppc64-relocs-01.ll
  ppc64-tls-relocs-01.ll




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183829 91177308-0d34-0410-b5e6-96231b3b80d8
Fix 'gcc -flto' builds for unittest binaries (undefined reference to
`typeinfo for llvm::cl::GenericOptionValue').

Remove an "anchor" method for an abstract class. (This does not
increase the number of vtables.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183830 91177308-0d34-0410-b5e6-96231b3b80d8
Remove sys::CopyFile.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183831 91177308-0d34-0410-b5e6-96231b3b80d8
Remove Path::getSuffix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183833 91177308-0d34-0410-b5e6-96231b3b80d8

[MC/DWARF] Support .debug_frame / .debug_line code alignment factors

I've been comparing the object file output of LLVM's integrated
assembler against the external assembler on PowerPC, and one
area where differences still remain are in DWARF sections.

In particular, the GNU assembler generates .debug_frame and
.debug_line sections using a code alignment factor of 4, since
all PowerPC instructions have size 4 and must be aligned to a
multiple of 4.  However, current MC code hard-codes a code
alignment factor of 1.

This patch changes this by adding a "minimum instruction alignment"
data element to MCAsmInfo and using this as code alignment factor.

This requires passing a MCContext into MCDwarfLineAddr::Encode
and MCDwarfLineAddr::EncodeAdvanceLoc.  Note that one caller,
MCDwarfLineAddr::Write, didn't actually have that information
available.  However, it turns out that this routine is in fact
never used in the whole code base, so the patch simply removes
it.  If it turns out to be needed again at a later time, it
could be re-added with an updated interface.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183834 91177308-0d34-0410-b5e6-96231b3b80d8
Remove Path::isAbsolute().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183835 91177308-0d34-0410-b5e6-96231b3b80d8