ARM: intrinsic support for rbit.

We already have an ARMISD node. Create an intrinsic to map to it so we can
add support for the frontend __rbit() intrinsic.

rdar://9283021

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211057 91177308-0d34-0410-b5e6-96231b3b80d8
AArch64: Add backend intrinsic for rbit.

Define an intrinsic for the frontend to use and pattern match it to
the RBIT instruction.

rdar://9283021

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211058 91177308-0d34-0410-b5e6-96231b3b80d8
Add load/store functionality

Summary:
This patches allows non conversions like i1=i2; where both are global ints.
In addition, arithmetic and other things start to work since fast-isel will use
existing patterns for non fast-isel from tablegen files where applicable.

In addition i8, i16 will work in this limited context for assignment without the need
for sign extension (zero or signed). It does not matter how i8 or i16 are loaded (zero or sign extended)
since only the 8 or 16 relevant bits are used and clang will ask for sign extension before using them in
arithmetic. This is all made more complete in forthcoming patches.

for example:
  int i, j=1, k=3;
 
  void foo() {
    i = j + k;
  }

Keep in mind that this pass is not enabled right now and is an experimental pass
It can only be enabled with a hidden option to llvm of -mips-fast-isel.

Test Plan: Run test-suite, loadstore2.ll and I will run some executable tests.

Reviewers: dsanders

Subscribers: mcrosier

Differential Revision: http://reviews.llvm.org/D3856

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211061 91177308-0d34-0410-b5e6-96231b3b80d8
Users of the llvm global mutex must now acquire it manually.

This allows the mutex to be acquired in a guarded, RAII fashion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211066 91177308-0d34-0410-b5e6-96231b3b80d8
Remove some more code out into a separate CL.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211067 91177308-0d34-0410-b5e6-96231b3b80d8
Remove some code churn.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211068 91177308-0d34-0410-b5e6-96231b3b80d8
Kill the LLVM global lock.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211069 91177308-0d34-0410-b5e6-96231b3b80d8
Programmer's Manual changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211070 91177308-0d34-0410-b5e6-96231b3b80d8
Cleanup more unreferenced MutexGuard parameters on functions.

These parameters are intended to serve as sort of a contract that
you cannot access the functions outside of a mutex.  However, the
entire JIT class cannot be accessed outside of a mutex anyway, and
all methods acquire a lock as soon as they are entered.  Since the
containing class already is not intended to be thread-safe, it only
serves to add code clutter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211071 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r211066, 211067, 211068, 211069, 211070.

These were committed accidentally from the wrong branch before having
a review sign-off.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211072 91177308-0d34-0410-b5e6-96231b3b80d8