John Brawn 0328ca6cd7 [ARM] Align stack objects passed to memory intrinsics
Memcpy, and other memory intrinsics, typically tries to use LDM/STM if
the source and target addresses are 4-byte aligned. In CodeGenPrepare
look for calls to memory intrinsics and, if the object is on the
stack, 4-byte align it if it's large enough that we expect that memcpy
would want to use LDM/STM to copy it.

Differential Revision: http://reviews.llvm.org/D7908


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232627 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-18 12:01:59 +00:00
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