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Author SHA1 Message Date
Benjamin Kramer 487a3962c7 GlobalOpt: Be more aggressive about elminating side-effect free static dtors. 
GlobalOpt runs early in the pipeline (before inlining) and complex class
hierarchies often introduce bitcasts or GEPs which weren't optimized away.
Teach it to ignore side-effect free instructions instead of depending on
other passes to remove them.

llvm-svn: 150174
 2012-02-09 14:26:06 +00:00
Anders Carlsson ee6bc70d2f Add an optimization to GlobalOpt that eliminates calls to __cxa_atexit, if the function passed is empty. 
llvm-svn: 127970
 2011-03-20 17:59:11 +00:00