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Document another instsimplify assumption.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174100 91177308-0d34-0410-b5e6-96231b3b80d8
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// values. This will prevent other code from seeing the same undef uses and
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// resolving them to different values.
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//
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// These routines are designed to tolerate moderately incomplete IR, such as
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// instructions that are not connected to basic blocks yet. However, they do
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// require that all the IR that they encounter be valid. In particular, they
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// require that all non-constant values be defined in the same function, and the
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// same call context of that function (and not split between caller and callee
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// contexts of a directly recursive call, for example).
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_INSTRUCTIONSIMPLIFY_H
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