Michael Ilseman 6bd55f4125 Cache the result of Function::getIntrinsicID() in a DenseMap attached to the LLVMContext.
This reduces the time actually spent doing string to ID conversion and shows a 10% improvement in compile time for a particularly bad case that involves ARM Neon intrinsics (these have many overloads).

Patch by Jean-Luc Duprat!

llvm-svn: 176365
2013-03-01 18:48:54 +00:00
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