maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
281,638 Commits 23 Branches 0 Tags 2.2 GiB
Commit Graph

3 Commits

Author SHA1 Message Date
Jatin Bhateja c61ade1ca0 [SCEV] Handling for ICmp occuring in the evolution chain. 
Summary:
 If a compare instruction is same or inverse of the compare in the
 branch of the loop latch, then return a constant evolution node.
 This shall facilitate computations of loop exit counts in cases
 where compare appears in the evolution chain of induction variables.

 Will fix PR 34538

Reviewers: sanjoy, hfinkel, junryoungju

Reviewed By: sanjoy, junryoungju

Subscribers: javed.absar, llvm-commits

Differential Revision: https://reviews.llvm.org/D38494

llvm-svn: 318050
 2017-11-13 16:43:24 +00:00
Sanjoy Das 2f27456c82 Revert "[ScalarEvolution] Handling for ICmp occuring in the evolution chain." 
This reverts commit r316054.  There was some confusion over the review process:
http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20171016/495884.html

llvm-svn: 316129
 2017-10-18 22:00:57 +00:00
Jatin Bhateja 1fc49627e4 [ScalarEvolution] Handling for ICmp occuring in the evolution chain. 
Summary:
 If a compare instruction is same or inverse of the compare in the
 branch of the loop latch, then return a constant evolution node.
 Currently scope of evaluation is limited to SCEV computation for
 PHI nodes.

 This shall facilitate computations of loop exit counts in cases
 where compare appears in the evolution chain of induction variables.

 Will fix PR 34538
Reviewers: sanjoy, hfinkel, junryoungju

Reviewed By: junryoungju

Subscribers: javed.absar, llvm-commits

Differential Revision: https://reviews.llvm.org/D38494

llvm-svn: 316054
 2017-10-18 01:36:16 +00:00