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Author SHA1 Message Date
Eli Friedman b14873c4f1 Get rid of the getPointeeAlignment helper function from 
InstCombineLoadStoreAlloca.cpp, which had many issues.
(At least two bugs were noted on llvm-commits, and it was overly conservative.)
Instead, use getOrEnforceKnownAlignment.

llvm-svn: 168629
 2012-11-26 23:04:53 +00:00
Chandler Carruth c908ca1766 Port the global copy optimization from the SROA pass to InstCombine. 
This optimization is really just replacing allocas wholesale with
globals, there is no scalarization.

The underlying motivation for this patch is to simplify the SROA pass
and focus it on splitting and promoting allocas.

llvm-svn: 162271
 2012-08-21 08:39:44 +00:00