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Commit 89288994 authored by Chris Lattner's avatar Chris Lattner
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Implement a new DecomposeGEPExpression method, which decomposes a GEP into a... 

Implement a new DecomposeGEPExpression method, which decomposes a GEP into a list of scaled offsets.  Use this to eliminate some previous ad-hoc code which was subtly broken (it assumed all Constant*'s were non-zero, but strange constant express could be zero).

llvm-svn: 89915
parent a99edbed
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