Remove dead declarations.

Patch by Tobias Güntner.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205119 91177308-0d34-0410-b5e6-96231b3b80d8
Support: normalize the default triple on Unix

This will fix cross-compiling buildbots (e.g. cygwin).  This is in the same vein
as SVN r205070.  Apply this to fix the cross-compiling scenario, even though the
preferred solution is to update the build system to normalize the embedded
triple rather than perform this at runtime every time.  This is meant to tide us
over until that approach is fleshed out and applied.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205120 91177308-0d34-0410-b5e6-96231b3b80d8
Add a missing break.

Patch by Tobias Güntner.

I tried to write a test, but the only difference is the Changed value that
gets returned. It can be tested with "opt -debug-pass=Executions -functionattrs,
but that doesn't seem worth it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205121 91177308-0d34-0410-b5e6-96231b3b80d8
[PBQP] Move invalid graph nodeId/edgeId methods into base class.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205122 91177308-0d34-0410-b5e6-96231b3b80d8
[MC] Remove an unused (and broken) variant of the setupForSymbolicDisassembly
method in MCDisassembler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205123 91177308-0d34-0410-b5e6-96231b3b80d8
X86Subtarget.h: isTargetWindows() should tell whether he is targeting msvc.

FYI, !isWindowsGNUEnvironment() is insufficient. It missed cygwin.

FIXME: The name "isTargetWindows" should be fixed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205124 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test/Transforms/LoopStrengthReduce/ARM64/lsr-*.ll: Add explicit triple arm64-unknown for targeting pecoff.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205125 91177308-0d34-0410-b5e6-96231b3b80d8
Suppress llvm/test/CodeGen/ARM64 for targeting pecoff. ARM64 is unaware of that.

FIXME: Could we support them?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205126 91177308-0d34-0410-b5e6-96231b3b80d8
Support: correct Windows normalisation

If the environment is unknown and no object file is provided, then assume an
"MSVC" environment, otherwise, set the environment to the object file format.

In the case that we have a known environment but a non-native file format for
Windows (COFF) which is used for MCJIT, then append the custom file format to
the triple as an additional component.

This fixes the MCJIT tests on Windows.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205130 91177308-0d34-0410-b5e6-96231b3b80d8
ARM64: override all the things.

Actually, mostly only those in the top-level directory that already
had a "virtual" attached. But it's the thought that counts and it's
been a long day.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205131 91177308-0d34-0410-b5e6-96231b3b80d8
ARM64: remove -m32/-m64 mapping with ARM.

This is causing the ARM build-bots to fail since they only include
the ARM backend and can't create an ARM64 target.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205132 91177308-0d34-0410-b5e6-96231b3b80d8
ARM64: remove unused variables

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205133 91177308-0d34-0410-b5e6-96231b3b80d8
ARM64: uncopy/paste helper function

It was doing functional but highly suspect operations on bools due to
the more limited shifting operands supported by memory instructions.

Should fix some MSVC warnings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205134 91177308-0d34-0410-b5e6-96231b3b80d8
[ARM64] Fix a heap-use-after-free spotted by ASan.

StringRef::lower() returns a std::string. Better yet, we can now stop
thinking about what it returns and write 'auto'. It does the right
thing. =]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205135 91177308-0d34-0410-b5e6-96231b3b80d8
Don't mark the declarations of the TSan annotation functions as weak.
That causes references to them to be weak references which can collapse
to null if no definition is provided. We call these functions
unconditionally, so a definition *must* be provided. Make the
definitions provided in the .cpp file weak by re-declaring them as weak
just prior to defining them. This should keep compilers which cannot
attach the weak attribute to the definition happy while actually
resolving the symbols correctly during the link.

You might ask yourself upon reading this commit log: how did *any* of
this work before? Well, fun story. It turns out we have some code in
Support (BumpPtrAllocator) which both uses virtual dispatch and has
out-of-line vtables used by that virtual dispatch. If you move the
virtual dispatch into its header in *just* the right way, the optimizer
gets to devirtualize, and remove all references to the vtable. Then the
sad part: the references to this one vtable were the only strong symbol
uses in the support library for llvm-tblgen AFAICT. At least, after
doing something just like this, these symbols stopped getting their weak
definition and random calls to them would segfault instead.

Yay software.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205137 91177308-0d34-0410-b5e6-96231b3b80d8
[Allocator] Stop forward-declaring BumpPtrAllocator in a few places.
This is a necessary step to lifting some of its configuration into
template parameters rather than runtime parameters.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205140 91177308-0d34-0410-b5e6-96231b3b80d8
[Allocator] Simplify unittests by using the default size parameters in
more places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205141 91177308-0d34-0410-b5e6-96231b3b80d8
[Allocator] Lift the slab size and size threshold into template
parameters rather than runtime parameters.

There is only one user of these parameters and they are compile time for
that user. Making these compile time seems to better reflect their
intended usage as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205143 91177308-0d34-0410-b5e6-96231b3b80d8
[PowerPC] Handle VSX v2i64 SIGN_EXTEND_INREG

sitofp from v2i32 to v2f64 ends up generating a SIGN_EXTEND_INREG v2i64 node
(and similarly for v2i16 and v2i8). Even though there are no sign-extension (or
algebraic shifts) for v2i64 types, we can handle v2i32 sign extensions by
converting two and from v2i64. The small trick necessary here is to shift the
i32 elements into the right lanes before the i32 -> f64 step. This is because
of the big Endian nature of the system, we need the i32 portion in the high
word of the i64 elements.

For v2i16 and v2i8 we can do the same, but we first use the default Altivec
shift-based expansion from v2i16 or v2i8 to v2i32 (by casting to v4i32) and
then apply the above procedure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205146 91177308-0d34-0410-b5e6-96231b3b80d8
llvm/test/MC/ELF/nocompression.s: Loosen an expression to match "llvm-mc.EXE".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205148 91177308-0d34-0410-b5e6-96231b3b80d8