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5 Commits

Author SHA1 Message Date
Chris Lattner
a6299345ee * Add capability to recognize alias properties of the following common cases: 
- A[c1] cannot alias A[c2] where constants c1 != c2
  - A[i] cannot alias B[j] if A & B are provably different arrays

This should help out array based codes.  For example, from bzip2 from spec,
3 additional loads can be GCSE'd, and _21_ additional loads can be LICMd due
to this change.

In a test example from the Spec GAP benchmark (vecffe.c), this change allows
_52_ additional loads to be GCSE'd and _224_ additional LICM'd loads.

Not bad for such a simple change.  Other testcases show no change at all
because they just don't use arrays.  Not too suprising there.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3616 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-09-08 18:45:18 +00:00
Chris Lattner
04b9025450 Remove unneeded #include 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3524 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-29 20:08:55 +00:00
Chris Lattner
f9355f636b doxygenize comments 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3481 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-22 22:46:39 +00:00
Chris Lattner
22d8cd6143 Add missing #include 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3467 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-22 18:57:09 +00:00
Chris Lattner
53ad0edd36 Check-in new alias analysis infrastructure 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3465 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-22 18:25:32 +00:00