dobenour authored Dec 09, 2016 and Ben Gamari committed Dec 09, 2016

Accesses through a Cmm local are currently reported as having the
"other" type, which can only alias other "other" accesses.  However,
this assumption is incorrect, which can result in silent bad LLVM
codegen.

Fixes #9308.
Fixes #9504.

Test Plan: GHC CI

Reviewers: rwbarton, austin, bgamari

Reviewed By: bgamari

Subscribers: michalt, thomie

Differential Revision: https://phabricator.haskell.org/D2758

GHC Trac Issues: #9125, #9308, #9504