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Author SHA1 Message Date
Andrew Trick 870c1a3f15 Reapply r141870, SCEV expansion of post-inc. 
Speculatively reapply to see if this test case still crashes on
linux. I may have fixed it in my last checkin.

llvm-svn: 141895
 2011-10-13 21:55:29 +00:00
Andrew Trick 41c253c35c Revert r141870. The test case crashes on linux with data corruption. A deeper issue was exposed. 
llvm-svn: 141873
 2011-10-13 17:58:24 +00:00
Andrew Trick e15d6e14e3 LSR: Reuse the post-inc expansion of expressions. 
This avoids unnecessary expansion of expressions and allows the SCEV
expander to work on expression DAGs, not just trees.
Fixes PR11090.

llvm-svn: 141870
 2011-10-13 17:31:47 +00:00