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Author SHA1 Message Date
Michael Gottesman d6ce6cbdac [objc-arc] Track if we encountered an additive overflow while computing {TopDown,BottomUp}PathCounts and do nothing if it occurred. 
I fixed the aforementioned problems that came up on some of the linux boxes.
Major thanks to Nick Lewycky for his help debugging!

rdar://14590914

llvm-svn: 188122
 2013-08-09 23:22:27 +00:00
Michael Gottesman 6663c7d5fc Revert "[objc-arc] Track if we encountered an additive overflow while computing {TopDown,BottomUp}PathCounts and do nothing if it occured." 
This reverts commit r187941.

The commit was passing on my os x box, but it is failing on some non-osx
platforms. I do not have time to look into it now, so I am reverting and will
recommit after I figure this out.

llvm-svn: 187946
 2013-08-08 00:41:18 +00:00
Michael Gottesman ddc89fcccd [objc-arc] Track if we encountered an additive overflow while computing {TopDown,BottomUp}PathCounts and do nothing if it occured. 
rdar://14590914

llvm-svn: 187941
 2013-08-07 23:56:41 +00:00
Michael Gottesman 9e7261c874 [objc-arc] Ensure that the cfg path count does not overflow when we multiply TopDownPathCount/BottomUpPathCount. 
rdar://12480535

llvm-svn: 183489
 2013-06-07 06:16:49 +00:00
Dan Gohman 7c84dad80a Detect overflow in the path count computation. rdar://12277446. 
llvm-svn: 163739
 2012-09-12 20:45:17 +00:00