Fix behavior of __builtin_bit_cast when the From and To types are the
same.

We were missing the lvalue-to-rvalue conversion entirely in this case,
and in fact still need the full CK_LValueToRValueBitCast conversion to
perform a load with no TBAA.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@373874 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed