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8ea048fa83
We make many redundant calls to isInterestingAlloca in the AddressSanitzier pass. This is especially inefficient for allocas that have many uses. Let's cache the results to speed up compilation. The compile time improvements depend on the input. I did not see much difference on benchmarks; however, I have a test case where compile time goes from minutes to under a second. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233397 91177308-0d34-0410-b5e6-96231b3b80d8
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