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* Fix comments at top of file * Change algorithm for running the call optimizations from n*n to something closer to n. * Use a hash_map to store and lookup the optimizations since there will eventually (or potentially) be a large number of them. This gets lookup based on the name of the function to O(1). Each CallOptimizer now has a std::string member named func_name that tracks the name of the function that it applies to. It is this string that is entered into the hash_map for fast comparison against the function names encountered in the module. * Cleanup some style issues pertaining to iterator invalidation * Don't pass the Function pointer to the OptimizeCall function because if the optimization needs it, it can get it from the CallInst passed in. * Add the skeleton for a new CallOptimizer, StrCatOptimizer which will eventually replace strcat's of constant strings with direct copies. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21526 91177308-0d34-0410-b5e6-96231b3b80d8
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