[LifetimeAnalysis] Add [[gsl::Pointer]] to llvm::StringRef
Summary:
This detected the bugs fixed in
https://reviews.llvm.org/D66442
and
https://reviews.llvm.org/D66440
The warning itself was implemented in
https://reviews.llvm.org/D63954
https://reviews.llvm.org/D64256
https://reviews.llvm.org/D65120
https://reviews.llvm.org/D65127
https://reviews.llvm.org/D66152
Reviewers: zturner, mehdi_amini, gribozavr
Subscribers: dexonsmith, Szelethus, xazax.hun, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66443