SIL: fix memory behavior of bind_memory and rebind_memory
#67330
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Since dead-store-elimination is now more accurate, it's important that the `bind_memory` instructions are also defined to _read_ memory. Otherwise they are not considered as barriers for dead-store-elimination. Fixes a miscompile. rdar://112150142
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Since dead-store-elimination is now more accurate, it's important that the
bind_memoryinstructions are also defined to read memory. Otherwise they are not considered as barriers for dead-store-elimination.Fixes a miscompile.
rdar://112150142