John McCall a5efa7386a Track whether an AggValueSlot is potentially aliased, and do not ...

emit call results into potentially aliased slots.  This allows us
to properly mark indirect return slots as noalias, at the cost
of requiring an extra memcpy when assigning an aggregate call
result into a l-value.  It also brings us into compliance with
the x86-64 ABI.

llvm-svn: 138599

2011-08-25 23:04:34 +00:00

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