[PowerPC] Fix @got references to local symbols

A @got reference must always result in a relocation, so that
the linker has a chance to set up the GOT entry, even if the
symbol happens to be local.

Add a PPCELFObjectWriter::ExplicitRelSym routine that enforces
a relocation to be emitted for GOT references.

llvm-svn: 185353

llvm-svn: 185352

[PowerPC] Add "wait" instruction

This adds the "wait" instruction and its extended mnemonics.

llvm-svn: 185350

[PowerPC] Support "eieio" instruction

This adds support for the "eieio" instruction to
the asm parser.

llvm-svn: 185349

Added c++ mode selector to head of SelectionDAGBuilder.h so editors open it in c++ mode instead of c mode.

llvm-svn: 185348

[PowerPC] Add some existing instructions to ppc64-encoding-bookII.s

The test case had a couple of FIXMEs where the instruction is in
fact already supported by the back-end.  In some other case, while
the generic form of the instruction is not yet supported, a
specialized form is.  This adds tests for those already supported
instructions / instruction forms.

llvm-svn: 185347

This lead to weird formatting.
Before:
DoSomethingWithVector({ {} /* No data */ }, {
  { 1, 2 }
});
After:
DoSomethingWithVector({ {} /* No data */ }, { { 1, 2 } });

llvm-svn: 185346

llvm-svn: 185345

[PowerPC] Add variants of "sync" instruction

This adds support for the "sync $L" instruction with operand,
and provides aliases for "lwsync" and "ptesync".

llvm-svn: 185344

llvm-svn: 185343

llvm-svn: 185342

llvm-svn: 185340

I believe the full "dmb ish" barrier is not required to guarantee release
semantics for atomic operations. The weaker "dmb ishst" prevents previous
operations being reordered with a store executed afterwards, which is enough.

A key point to note (fortunately already correct) is that this barrier alone is
*insufficient* for sequential consistency, no matter how liberally placed.

llvm-svn: 185339

llvm-svn: 185338

Summary:
Add penalty when an excessively long line in a block comment can not be
broken on a leading whitespace. Lack of this addition can lead to severe column
width violations when they can be easily avoided.

Reviewers: djasper

Reviewed By: djasper

CC: cfe-commits, klimek

Differential Revision: http://llvm-reviews.chandlerc.com/D1071

llvm-svn: 185337

Since we were explicitly not calling AsmPrinter::doInitialization,
any module-scope inline asm was not being printed.

llvm-svn: 185336

llvm-svn: 185335

We are using virtual registers throughout now, but we still need
to keep a few physical registers per class around to keep the
infrastructure happy.

llvm-svn: 185334

llvm-svn: 185333

llvm-svn: 185332

Fix a case where we were incorrectly sign-extending a value when we should have been zero-extending the value.

Also change some SIGN_EXTEND to ANY_EXTEND because we really dont care and may have more opportunity to fold subexpressions

llvm-svn: 185331

llvm-svn: 185330

llvm-svn: 185329

llvm-svn: 185328

This is not all bad, but people are often surprised by it.

Before:
namespace {
int SomeVariable = 0; // comment
}                     // namespace

After:
namespace {
int SomeVariable = 0; // comment
} // namespace

llvm-svn: 185327

llvm-svn: 185326

Patch by Jesse Ruderman<jruderman@gmail.com>

llvm-svn: 185325

llvm-svn: 185324

Cygwin does not accept the form /CYGDRIVE/X/PATH/TO/FILE against /cygdrive/X/PATH/TO/FILE.
"cygdrive" must be lower-cased.

llvm-svn: 185323

FIXME: Could we use llvm::sys::Path here?
llvm-svn: 185322

Before (for styles where the pointer binds to the type):
template <class... Ts> void Foo(Ts... ts) {}
template <class... Ts> void Foo(Ts* ... ts) {}
After:
template <class... Ts> void Foo(Ts... ts) {}
template <class... Ts> void Foo(Ts*... ts) {}

llvm-svn: 185321

Before: void f(int */* unused */) {}
After:  void f(int * /* unused */) {}

The previous version seems to be valid C++ code but confuses many syntax
highlighters.

llvm-svn: 185320

Before:
DoSomethingWithVector({
} /* No data */);
After:
DoSomethingWithVector({} /* No data */);

llvm-svn: 185319

llvm-svn: 185318

PTRACE_SETREGSET & PTRACE_GETREGSET may be missing from linux headers.

llvm-svn: 185317

llvm-svn: 185316

llvm-svn: 185315

llvm-svn: 185314

The build system is currently miss-identifying GNU/kFreeBSD as FreeBSD.
This kind of simplification is sometimes useful, but in general it's not correct. 

As GNU/kFreeBSD is an hybrid system, for kernel-related issues we want to match the
build definitions used for FreeBSD, whereas for userland-related issues we want to
match the definitions used for other systems with Glibc.

The current modification adjusts the build system so that they can be distinguished,
and explicitly adds GNU/kFreeBSD to the build checks in which it belongs.

Fixes bug #16446.

Patch by Robert Millan in the context of Debian.

llvm-svn: 185313

The build system is currently miss-identifying GNU/kFreeBSD as FreeBSD.
This kind of simplification is sometimes useful, but in general it's not correct. 

As GNU/kFreeBSD is an hybrid system, for kernel-related issues we want to match the
build definitions used for FreeBSD, whereas for userland-related issues we want to
match the definitions used for other systems with Glibc.

The current modification adjusts the build system so that they can be distinguished,
and explicitly adds GNU/kFreeBSD to the build checks in which it belongs.

Fixes bug #16445.

Patch by Robert Millan in the context of Debian.

llvm-svn: 185312