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Author SHA1 Message Date
Torok Edwin
b679de2a21 The rewriter may hold references to instructions that are deleted because they are trivially dead. 
Fix by clearing the rewriter cache before deleting the trivially dead
instructions.
Also make InsertedExpressions use an AssertingVH to catch these
bugs easier.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72364 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-24 14:23:16 +00:00