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Commit 580b80d6 authored by Dan Gohman's avatar Dan Gohman
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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
parent 1f522d98
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