Pull in r279454 from upstream llvm trunk (by James Molloy):

[SROA] Remove incorrect assertion

  Confirmed with aprantl, this assertion is incorrect - code can get
  here (for example 80-bit FP types) and if it does it's benign. This
  is exposed by a completely unrelated patch of mine, so stop the
  compiler falling over.

  Original differential: http://reviews.llvm.org/D16187
  aprantl's advice to remove assertion:
  http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20160815/382129.html

This should fix assertions when building the math/opensolaris-libm port.

Reported by:	marino
MFC after:	3 days

contrib/llvm/lib/Transforms/Scalar/SROA.cpp

@@ -4040,9 +4040,6 @@ bool SROA::splitAlloca(AllocaInst &AI, AllocaSlices &AS) {
           Size = std::min(Size, AbsEnd - Start);
         }
         PieceExpr = DIB.createBitPieceExpression(Start, Size);
-      } else {
-        assert(Pieces.size() == 1 &&
-               "partition is as large as original alloca");
       }
 
       // Remove any existing dbg.declare intrinsic describing the same alloca.