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Author SHA1 Message Date
Jim Grosbach 95d2eb95c3 InstCombine: Don't shrink allocas when combining with a bitcast. 
When considering folding a bitcast of an alloca into the alloca itself,
make sure we don't shrink the amount of memory being allocated, or
things rapidly go sideways.

rdar://13324424

llvm-svn: 176547
 2013-03-06 05:44:53 +00:00