Merging r352822:

Merging r352822:
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r352822 | ahatanak | 2019-02-01 01:12:06 +0100 (Fri, 01 Feb 2019) | 8 lines

Revert "[Sema] Make canPassInRegisters return true if the CXXRecordDecl passed"

This reverts commit r350920 as it is not clear whether we should force a
class to be returned in registers when copy and move constructors are
both deleted.

For more background, see the following discussion:
http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20190128/259907.html
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_80@352855 91177308-0d34-0410-b5e6-96231b3b80d8