Sanjoy Das df4b162e4d [ImplicitNullChecks] Do not not handle call MachineInstrs ...

We don't track callee clobbered registers correctly, so avoid hoisting
across calls.

Note: for this bug to trigger we need a `readonly` call target, since we
already have logic to not hoist across potentially storing instructions
either.

llvm-svn: 287159

2016-11-16 21:45:22 +00:00

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