Port bitfield fixes from mainline.
Port debug info fixes from mainline.
Port gcc-4.8 support from mainline.
Merging r182364:
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r182364 | d0k | 2013-05-21 02:58:54 -0700 (Tue, 21 May 2013) | 4 lines

X86: When emulating unsigned PCMPGTQ with PCMPGTD, fix the sign bit for the smaller type.

Otherwise we'll get a mix of signed and unsigned compares.
Fixes PR15977.
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Merging r182112:
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r182112 | tstellar | 2013-05-17 08:23:12 -0700 (Fri, 17 May 2013) | 1 line

R600: Pass MCSubtargetInfo reference to R600CodeEmitter
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Merging r182387:
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r182387 | jholewinski | 2013-05-21 07:37:16 -0700 (Tue, 21 May 2013) | 7 lines

Drop @llvm.annotation and @llvm.ptr.annotation intrinsics during codegen.

The intrinsic calls are dropped, but the annotated value is propagated.

Fixes PR 15253

Original patch by Zeng Bin!
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Merging r182385:
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r182385 | hfinkel | 2013-05-21 07:21:09 -0700 (Tue, 21 May 2013) | 9 lines

Fix PPC branch selection for counter-based branches

Although I had added some support for the BDZ/BDNZ branches into the selector
(in r158204), I had not correctly adjusted the condition at the top of the
loop. As a result, these branches were still essentially unsupported.

This fixes PR16086. Unfortunately, any test case would be very large (because
it would need to force the loop backedge to exceed the range of the 16-bit
immediate).
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Merging r181366:
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r181366 | enderby | 2013-05-07 14:40:58 -0700 (Tue, 07 May 2013) | 6 lines

Fix a bug in the MC asm parser evaluating expressions.  It was treating:
A = 9
B = 3 * A - 2 * A + 1 as  B = 3 * A - (2 * A + 1)

rdar://13816516

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Merging r181363:
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r181363 | cdavis | 2013-05-07 14:14:15 -0700 (Tue, 07 May 2013) | 3 lines

MCStreamer: Also clear vector of W64UnwindInfos on reset().

Patch by Kai Nacke!
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