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5dc48ac04a
A byval object, even if allocated at a fixed offset (prescribed by the ABI) is pointed to by IR values. Most fixed-offset stack objects are not pointed-to by IR values, so the default is to assume this is not possible. However, we need to override the default in this case (instruction scheduling can cause miscompiles otherwise). Fixes PR20280. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215795 91177308-0d34-0410-b5e6-96231b3b80d8