Andrew Trick dbe2bdf9e7 Indvars: guard against exponential behavior in isHighCostExpansion. ...

This should always be done as a matter of principal. I don't have a
case that exposes the problem. I just noticed this recently while
scanning the code and realized I meant to fix it long ago.

llvm-svn: 146438

2011-12-12 22:46:16 +00:00

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