[LLVMdev] ConstantExpr lowering pass for code generators

[Chris Lattner]

Following up on the '[LLVMdev] Getelementptr woes' thread:
http://mail.cs.uiuc.edu/pipermail/llvmdev/2004-June/001252.html

I'm happy to say that Vladimir Prus contributed a constant expression
lowering pass for instruction selectors to use.  This pass makes
instruction selection both easier and less error prone.

Thanks Vladimir, and sorry for being such a butthead about it earlier on
the list. :)

-Chris

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