Pull in r329671 from upstream clang trunk (by Akira Hatanaka):
[ExprConstant] Use an AST node and a version number as a key to create an APValue and retrieve it from map Temporaries. The version number is needed when a single AST node is visited multiple times and is used to create APValues that are required to be distinct from each other (for example, MaterializeTemporaryExprs in default arguments and VarDecls in loops). rdar://problem/36505742 Differential Revision: https://reviews.llvm.org/D42776
This should fix 'Assertion failed: (Result.isUninit() && "temporary
created multiple times"), function createTemporary' errors (if
assertions are enabled, otherwise the compiler internal state might go
bad), when building the graphics/rawtherapee port.
Direct commit to stable/11 and stable/12, since head already has clang
7.0.1, which includes this change.