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a16d5a5185
* Correct stale documentation in a few places * Re-order the file to better associate things and reduce line count * Make the pass thread safe by caching the Function* objects needed by the optimizers in the pass object instead of globally. * Provide the SimplifyLibCalls pass object to the optimizer classes so they can access cached Function* objects and TargetData info * Make sure the pass resets its cache if the Module passed to runOnModule changes * Rename CallOptimizer LibCallOptimization. All the classes are named *Optimization while the objects are *Optimizer. * Don't cache Function* in the optimizer objects because they could be used by multiple PassManager's running in multiple threads * Add an optimization for strcpy which is similar to strcat * Add a "TODO" list at the end of the file for ideas on additional libcall optimizations that could be added (get ideas from other compilers). Sorry for the huge diff. Its mostly reorganization of code. That won't happen again as I believe the design and infrastructure for this pass is now done or close to it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21589 91177308-0d34-0410-b5e6-96231b3b80d8
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