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Author SHA1 Message Date
Dan Gohman 580b80d6d9 Make ConstantFoldConstantExpression recursively visit the entire 
ConstantExpr, not just the top-level operator. This allows it to
fold many more constants.

Also, make GlobalOpt call ConstantFoldConstantExpression on
GlobalVariable initializers.

llvm-svn: 89659
 2009-11-23 16:22:21 +00:00