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55 Commits

Author SHA1 Message Date
Chris Lattner 249265de06 add ability for clients of SSAUpdater to find out about the 
PHI nodes inserted.

llvm-svn: 83744
 2009-10-10 23:15:24 +00:00
Chris Lattner 67cdd8b567 add the ability to get a rewritten value from the middle of a block, 
not just at the end.  Add a big comment explaining when this could
be useful (which never happens for jump threading).

llvm-svn: 83741
 2009-10-10 23:00:11 +00:00
Chris Lattner e474a8d3a7 rename GetValueInBlock -> GetValueAtEndOfBlock to better reflect 
what it does.

llvm-svn: 83740
 2009-10-10 22:41:58 +00:00
Chris Lattner 65e69a77e1 use a typedef instead of spelling out an insane type. Yay for auto someday. 
llvm-svn: 83707
 2009-10-10 09:09:20 +00:00
Chris Lattner 60d4e69c81 Implement an efficient and fully general SSA update mechanism that 
works on unstructured CFGs.  This implements PR217, our oldest open PR.

llvm-svn: 83705
 2009-10-10 09:04:27 +00:00