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Summary

  1. [X86][AutoUpgrade] Simplify string management in UpgradeDataLayoutString a bit. NFCI (details)
Commit 8750d54cea31751fbf1dbcb03b7569493769fdef by craig.topper
[X86][AutoUpgrade] Simplify string management in UpgradeDataLayoutString a bit. NFCI

We don't need a std::string for a literal string, we can use a
StringRef.

The addition of StringRefs produces a Twine that we can just call
str() without converting to a SmallString ourselves. Twine will
do that internally.
The file was modifiedllvm/lib/IR/AutoUpgrade.cpp (diff)