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path: root/lib/Transforms/Scalar/LoopStrengthReduce.cpp
AgeCommit message (Collapse)Author
2005-08-02Like the comment says, do not insert cast instructions before phi nodesChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22586 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-02add a comment, make a check more lenientChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22581 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-02Simplify for loop, clear a per-loop map after processing each loopChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22580 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-02Add a commentChris Lattner
Make LSR ignore GEP's that have loop variant base values, as we currently cannot codegen them git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22576 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-02Fix an iterator invalidation problemChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22575 91177308-0d34-0410-b5e6-96231b3b80d8
2005-07-30Keep tabs and trailing spaces out.Jeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22565 91177308-0d34-0410-b5e6-96231b3b80d8
2005-07-30Fix VC++ build problems.Jeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22564 91177308-0d34-0410-b5e6-96231b3b80d8
2005-07-30Ack, typoNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22560 91177308-0d34-0410-b5e6-96231b3b80d8
2005-07-30Commit a new LoopStrengthReduce pass that can use scalar evolutions andNate Begeman
target data to decide which loop induction variables to strength reduce and how to do so. This work is mostly by Chris Lattner, with tweaks by me to get it working on some of MultiSource. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22558 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-21Remove trailing whitespaceMisha Brukman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21427 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-06fix a bug where we thought arguments were constants :(Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20506 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-06Fix Regression/Transforms/LoopStrengthReduce/dont_insert_redundant_ops.ll,Chris Lattner
hopefully not breaking too many other things. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20505 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-06implement Transforms/LoopStrengthReduce/invariant_value_first_arg.llChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20501 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-06minor simplifications of the code.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20497 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-05Reformat comments to fix 80 columns.Jeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20467 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-05Reuse induction variables created for strength-reduced GEPs by other similar ↵Jeff Cohen
GEPs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20466 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-04Add support for not strength reducing GEPs where the element size is a smallJeff Cohen
power of two. This emphatically includes the zeroeth power of two. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20429 91177308-0d34-0410-b5e6-96231b3b80d8
2005-03-01Fixed the following LSR bugs:Jeff Cohen
* Loop invariant code does not dominate the loop header, but rather the end of the loop preheader. * The base for a reduced GEP isn't a constant unless all of its operands (preceding the induction variable) are constant. * Allow induction variable elimination for the simple case after all. Also made changes recommended by Chris for properly deleting instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20383 91177308-0d34-0410-b5e6-96231b3b80d8
2005-02-28Fix crash in LSR due to attempt to remove original induction variable. However,Jeff Cohen
for reasons explained in the comments, I also deactivated this code as it needs more thought. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20367 91177308-0d34-0410-b5e6-96231b3b80d8
2005-02-27PHI nodes were incorrectly placed when more than one GEP is reduced in a loop.Jeff Cohen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20360 91177308-0d34-0410-b5e6-96231b3b80d8
2005-02-27First pass at improved Loop Strength Reduction. Still not yet ready for ↵Jeff Cohen
prime time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20358 91177308-0d34-0410-b5e6-96231b3b80d8
2004-10-18Initial implementation of the strength reduction for GEP instructions inNate Begeman
loops. This optimization is not turned on by default yet, but may be run with the opt tool's -loop-reduce flag. There are many FIXMEs listed in the code that will make it far more applicable to a wide range of code, but you have to start somewhere :) This limited version currently triggers on the following tests in the MultiSource directory: pcompress2: 7 times cfrac: 5 times anagram: 2 times ks: 6 times yacr2: 2 times git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17134 91177308-0d34-0410-b5e6-96231b3b80d8
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