Erik Eckstein f0eed8c409 SILOptimizer: fix a bug in the TempRValue optimization which causes a miscompile. ...

The problematic scenario is that a function receives an @in_guaranteed and @inout parameter where one is a copy of the other value. For example, when appending a container to itself.
In this case the optimization removed the copy_addr, resulting in passing the same stack location to both parameters.

rdar://problem/47632890

2019-01-30 12:38:10 -08:00

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