[Tcwg-commits] [llvm] branch master updated (b424c9d -> a50f957)

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from b424c9d [GlobalISel] Add a way for targets to enable GISel. new a50f957 [DAGCombiner] mulhi + 1 never overflow.

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Summary of changes: lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 13 +++++++++++++ test/CodeGen/X86/overflow.ll | 6 ++---- 2 files changed, 15 insertions(+), 4 deletions(-)