Nick Lewycky 9a22d7b60f Replace EquivalenceClasses with a custom-built data structure. Many common ...

operations (like findProperties) should be faster, at the expense of
unionSets being slower in cases that are rare in practise.

Don't erase a dead Instruction. This fixes a memory corruption issue.

llvm-svn: 30235

2006-09-10 02:27:07 +00:00

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