LLVM Changes for alloc_align
LLVM Changes for alloc_align

GCC has the alloc_align attribute, which is similar to assume_aligned, except the attribute's parameter is the index of the integer parameter that needs aligning to.

This is the required LLVM changes to make this happen.

Differential Revision: https://reviews.llvm.org/D29598


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@298643 91177308-0d34-0410-b5e6-96231b3b80d8

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