Ahmed Bougacha 87166905c8 [CodeGen] Check FoldConstantArithmetic result before using it.
Fixes PR24602: r245689 introduced an unguarded use of
SelectionDAG::FoldConstantArithmetic, which returns 0 when it fails
because of opaque (hoisted) constants.

llvm-svn: 246217
2015-08-27 21:46:04 +00:00
2015-08-24 22:43:24 +00:00
2015-08-05 04:03:05 +00:00
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