[PATCH] [PATCH] DR712 - odr use and constant expressions

[Faisal Vali]

  For unused constexpr aggregates that make it into codegen - emit them as temporary variables as suggested by Eli Friedman.

  All tests seems to pass.

  Thoughts?

  Thanks!

Hi rsmith, rjmccall, doug.gregor,

http://llvm-reviews.chandlerc.com/D1140

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D1140?vs=2805&id=6114#toc

Files:
  lib/CodeGen/CGExpr.cpp
  lib/CodeGen/CGExprScalar.cpp
  lib/Sema/SemaExpr.cpp
  lib/Sema/SemaExprCXX.cpp
  test/CodeGenCXX/value-init.cpp
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