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Author SHA1 Message Date
Bill Wendling a032374ea0 Use references to attribute groups on the call/invoke instructions. 
Listing all of the attributes for the callee of a call/invoke instruction is way
too much and makes the IR unreadable. Use references to attributes instead.

llvm-svn: 175877
 2013-02-22 09:09:42 +00:00
Dan Gohman 5ab9c0a927 Fix SpeculativelyExecuteBB to either speculate all or none of the phis 
present in the bottom of the CFG triangle, as the transformation isn't
ever valuable if the branch can't be eliminated.

Also, unify some heuristics between SimplifyCFG's multiple
if-converters, for consistency.

This fixes rdar://10627242.

llvm-svn: 147630
 2012-01-05 23:58:56 +00:00
Frits van Bommel 8ae07996c9 Teach SimplifyCFG that (switch (select cond, X, Y)) is better expressed as a branch. 
Based on a patch by Alistair Lynn.

llvm-svn: 126647
 2011-02-28 09:44:07 +00:00