Commit Graph

3 Commits

Author SHA1 Message Date
Chris Lattner 8abcd56c74 DEBUG got moved to Support/Debug.h
llvm-svn: 7492
2003-08-01 22:15:03 +00:00
Chris Lattner 6c81ebc97d Add comment
llvm-svn: 6415
2003-05-29 20:26:30 +00:00
Chris Lattner 9023155621 Initial checkin of PRE on LLVM. This implementation is still lacking in
several ways:

 * Load expressions are not PRE'd well.  Alias Analysis should be used to
   get accurate information when computing anticipatibility.
 * The expression collection implementation does not handle PHI nodes properly,
   thus the implementation misses many opportunities to PRE.
 * This code could be sped up quite a bit

Despite these flaws, the code seems to work well, and handles PR's as one
would expect.

llvm-svn: 5759
2003-03-31 19:55:43 +00:00