Tim Northover eaee28b5ca ARM: check alignment before transforming ldr -> ldm (or similar). ...

ldm and stm instructions always require 4-byte alignment on the pointer, but we
weren't checking this before trying to reduce code-size by replacing a
post-indexed load/store with them. Unfortunately, we were also dropping this
incormation in DAG ISel too, but that's easy enough to fix.

llvm-svn: 281893

2016-09-19 09:11:09 +00:00

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