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Chris Lattner 9f9010ef47 Add a minor optimization: if we haven't changed the operands of an 
add, there is no need to scan the world to find the same add again.
This invalidates the previous testcase, which wasn't wonderful anyway,
because it needed a run of instcombine to permute the use-lists in 
just the right way to before GVN was run (so it was really fragile).
Not a big loss.

llvm-svn: 90973
 		2009-12-09 17:27:45 +00:00
clang Refactor OSAtomic evaluation logic into OSAtomicChecker. 2009-12-09 12:23:28 +00:00
compiler-rt Use __USER_LABEL_PREFIX__ so that we don't add a _ prefix on ELF. 2009-11-09 14:27:04 +00:00
llvm Add a minor optimization: if we haven't changed the operands of an 2009-12-09 17:27:45 +00:00