Duncan P. N. Exon Smith c82c11428e GlobalStatus: Don't walk use-lists of ConstantData ...

Return early from llvm::isSafeToDestroyConstant() whenever the value
`isa<ConstantData>()`.  These constants are shared across the
LLVMContext.  We never really want to delete them here, and walking
their use-lists can be very expensive.

(This is motivated by an eventual goal of removing use-lists entirely
from ConstantData.)

llvm-svn: 282320

2016-09-24 02:30:11 +00:00

7.0 KiB

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