Fix warnings in main and rebranch #62217
Merged
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A big part of this PR is to change to the new
llvm::Optional
API:getValue
->value
getValueOr
->value_or
hasValue
->has_value
map
->transform
The old API will be deprecated in the
rebranch
.To avoid merge conflicts, use the new API already in
main
.rdar://102362022
The PR also contains some other fixes for warnings in main and rebranch. For details see the commit messages.