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Commit d1c5a3aa authored by Dan Gohman's avatar Dan Gohman
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Don't scan for SSA register operands to update when not in SSA form. 

TailDuplicate can run on either on SSA code or non-SSA code, as indicated to
it by MRI->isSSA() ("PreRegAlloc" here). TailDuplicate does extra work to
preserve SSA invariants when it duplicates code. This patch makes it skip
some of this extra work in the case where the code is not in SSA form.

llvm-svn: 261450
parent 8d6a31c0
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