[PATCH] D89559: PR47372: Fix Lambda invoker calling conventions

[Erich Keane via Phabricator via cfe-commits]

erichkeane created this revision.
erichkeane added reviewers: rsmith, rjmccall.
erichkeane requested review of this revision.

As mentioned in the defect, the lambda static invoker does not follow
the calling convention of the lambda itself, which seems wrong. This
patch ensures that the calling convention of operator() is passed onto
the invoker and conversion-operator type.

This is accomplished by extracting the calling-convention determination
code out into a separate function in order to better reflect the 'thiscall'
work, as well as somewhat better support the future implementation of 
https://devblogs.microsoft.com/oldnewthing/20150220-00/?p=44623


Repository:
  rC Clang

https://reviews.llvm.org/D89559

Files:
  clang/lib/Sema/SemaLambda.cpp
  clang/test/SemaCXX/lambda-conversion-op-cc.cpp

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