[llvm-commits] CVS: llvm/lib/Transforms/Scalar/PRE.cpp
lattner at cs.uiuc.edu
Mon Mar 31 13:56:00 PST 2003
Changes in directory llvm/lib/Transforms/Scalar:
PRE.cpp added (r1.1)
Initial checkin of PRE on LLVM. This implementation is still lacking in
* 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
Diffs of the changes:
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