Convert MC command line option for fatal assembler warnings into a
proper flag.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216471 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r210342 and r210343, add test case for the crasher.
PR 20642.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216475 91177308-0d34-0410-b5e6-96231b3b80d8
MC: Split the x86 asm matcher implementations by dialect

The existing matcher has lots of AT&T assembly dialect assumptions baked
into it.  In particular, the hack for resolving the size of a memory
operand by appending the four most common suffixes doesn't work at all.
The Intel assembly dialect mnemonic table has ambiguous entries, so we
need to try matching multiple times with different operand sizes, since
that's the only way to choose different instruction variants.

This makes us more compatible with gas's implementation of Intel
assembly syntax.  MSVC assumes you want byte-sized operations for the
instructions that we reject as ambiguous.

Reviewed By: grosbach

Differential Revision: http://reviews.llvm.org/D4747

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216481 91177308-0d34-0410-b5e6-96231b3b80d8
Give ExecutionEngine of top level buffers.

Long term the idea if for the engine to not own the buffers, but for now
this is consistent with the rest of the API.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216484 91177308-0d34-0410-b5e6-96231b3b80d8
Pass a MemoryBufferRef when we can avoid taking ownership.

The attached patch simplifies a few interfaces that don't need to take
ownership of a buffer.

For example, both parseAssembly and parseBitcodeFile will parse the
entire buffer before returning. There is no need to take ownership.

Using a MemoryBufferRef makes it obvious in the type signature that
there is no ownership transfer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216488 91177308-0d34-0410-b5e6-96231b3b80d8
Pass a std::unique_ptr<MemoryBuffer>& to getLazyBitcodeModule.

By taking a reference we can do the ownership transfer in one place instead of
expecting every caller to do it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216492 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a couple of debug info test cases to match the metadata schema change in r216239

Found these while testing something else.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216505 91177308-0d34-0410-b5e6-96231b3b80d8