Introduce a cmake LLVM_ENABLE_LIBCXX build parameter to compile using libc++ instead of the system default 

Summary:
This parameter is required to build C++11 projects (like lld or lldb) on OS X as the default STL does not provide c++ classes.


CC: llvm-commits, triton

Differential Revision: http://llvm-reviews.chandlerc.com/D2381

llvm-svn: 198625

llvm-svn: 198624

Back out the <type_traits> changes from r198431; they were breaking when building with glibc. Need to find a better solution for PR18218.

llvm-svn: 198623

Try to fix Compiler Error C2011 following r198607 by removing enum from 'enum
TokenKind' parameter types.

llvm-svn: 198621

llvm-svn: 198618

The ARM backend has been using most of the MachO related subtarget
checks almost interchangeably, and since the only target it's had to
run on has been IOS (which is all three of MachO, Darwin and IOS) it's
worked out OK so far.

But we'd like to support embedded targets under the "*-*-none-macho"
triple, which means everything starts falling apart and inconsistent
behaviours emerge.

This patch should pick a reasonably sensible set of behaviours for the
new triple (and any others that come along, with luck). Some choices
were debatable (notably FP == r7 or r11), but we can revisit those
later when deficiencies become apparent.

llvm-svn: 198617

llvm-svn: 198616

llvm-svn: 198615

This requires a knowledge of the stack size which is not known until
the frame is complete, hence the need for the XCoreFTAOElim pass
which lowers the XCoreISD::FRAME_TO_ARGS_OFFSET instrution into its
final form.

llvm-svn: 198614

Only handles a depth of zero (the same as FRAMEADDR)

llvm-svn: 198613

llvm-svn: 198612

We also narrow the liveness of FP & LR during the prologue to
reflect the actual usage of the registers.
I have been unable to construct a test to prove the previous live
range was too large.

llvm-svn: 198611

This common functionality will be used to lower FRAME_TO_ARGS_OFFSET.

llvm-svn: 198610

llvm-svn: 198609

Rename several internal templates to get rid of ___ (triple underscores) or worse, four. No functionality change.

llvm-svn: 198608

This matches up the underlying type against the actual storage type 'unsigned
short' and lets us get rid of some casts while we're at it.

Effort is made to keep this building in pre-C++11 but as with other features
Token will be less efficiently packed in in legacy configurations.

llvm-svn: 198607

As far as the parser is concerned the tag type is always a keyword.

llvm-svn: 198606

llvm-svn: 198605

Implemented with a new getKeywordSpelling() accessor. Unlike getTokenName() the
result of this function is stable and may be used in diagnostic output.

Uses of this feature are split out into the subsequent commit.

llvm-svn: 198604

That's what it does, what the documentation says it does and what callers
expect it to do.

llvm-svn: 198603

Longer term, we want to move users to "*-*-*-macho" for embedded work, but for
now people are relying on the last thing we told them, which is unfortunately
"*-*-darwin-eabi".

rdar://problem/15703934

llvm-svn: 198602

enum-scoped.cpp:93:6: error: enumeration redeclared with different underlying type 'short' (was 'int')
  enum Redeclare6 : short;
       ^
enum-scoped.cpp:92:6: note: previous declaration is here
  enum Redeclare6 : int;
       ^            ~~~

The redeclaration source range is still missing but this is a step forward,
potentially edging towards a FixIt.

llvm-svn: 198601

In all three checks, the note indicates a previous declaration and never a 'use'.

Before:

  enum-scoped.cpp:92:6: note: previous use is here
    enum Redeclare6 : int;
         ^

After:

  enum-scoped.cpp:92:6: note: previous declaration is here
    enum Redeclare6 : int;
         ^

llvm-svn: 198600

llvm-svn: 198599

llvm-svn: 198598

type of a function.

llvm-svn: 198597

llvm-svn: 198596

llvm-svn: 198595

llvm-svn: 198594

llvm-svn: 198593

llvm-svn: 198592

llvm-svn: 198591

Instead of crashing, raise an error when a subtraction expression
involves an undefined symbol.

This fixes PR18375.

llvm-svn: 198590

llvm-svn: 198589

llvm-svn: 198588

llvm-svn: 198587

The 0x66 prefix toggles between 16-bit and 32-bit addressing mode.
So in 32-bit mode it is used to switch to 16-bit addressing mode for the
following instruction, while in 16-bit mode it's the other way round — it's
used to switch to 32-bit mode instead.

Thus, emit the 0x66 prefix byte for OpSize only in 32-bit (and 64-bit) mode,
and introduce a new OpSize16 bit which is used in 16-bit mode instead.

This is just the basic infrastructure for that change; a subsequent patch
will add the new OpSize16 bit to the 32-bit instructions that need it.

Patch from David Woodhouse.

llvm-svn: 198586

llvm-svn: 198585

This is not really expected to work right yet. Mostly because we will
still emit the OpSize (0x66) prefix in all the wrong places, along with
a number of other corner cases. Those will all be fixed in the subsequent
commits.

Patch from David Woodhouse.

llvm-svn: 198584

Add a reference to the ARM EHABI Specification as a follow up to SVN r198576

llvm-svn: 198583