Fix double delete in generic specialization. #1957
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We ended up adding the same instruction twice to a SmallVector of instructions to be deleted. To avoid this, we'll track these to-be-deleted instructions in a SmallSetVector instead. We were also failing to add an instruction that we can delete to the set of instructions to be deleted, so I fixed that as well. I've added a test case, but it's currently disabled because fixing this turned up another issue in the same code which I still need to take a look at. Fixes rdar://problem/25369617.
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@swift-ci Please test |
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What's in this pull request?
Fix a double deletion bug in generic specialization.
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We ended up adding the same instruction twice to a SmallVector of
instructions to be deleted. To avoid this, we'll track these
to-be-deleted instructions in a SmallSetVector instead.
We were also failing to add an instruction that we can delete to the set
of instructions to be deleted, so I fixed that as well.
I've added a test case, but it's currently disabled because fixing this
turned up another issue in the same code which I still need to take a
look at.
Fixes rdar://problem/25369617.