llvm-project

Commit Graph

Author	SHA1	Message	Date
Sanjoy Das	08e95b4703	[InstCombine] Add new rule for MIN(MAX(~A, ~B), ~C) et. al. Summary: Optimizing these well are especially interesting for IRCE since it "clamps" values by generating this sort of pattern through SCEV expressions. Depends on D9352. Reviewers: majnemer Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D9353 llvm-svn: 236203	2015-04-30 04:56:04 +00:00
Sanjoy Das	82ea3d45b5	New instcombine rule: max(~a,~b) -> ~min(a, b) This case is interesting because ScalarEvolutionExpander lowers min(a, b) as ~max(~a,~b). I think the profitability heuristics can be made more clever/aggressive, but this is a start. Differential Revision: http://reviews.llvm.org/D7821 llvm-svn: 230285	2015-02-24 00:08:41 +00:00

Author

SHA1

Message

Date

Sanjoy Das

08e95b4703

[InstCombine] Add new rule for MIN(MAX(~A, ~B), ~C) et. al.

Summary:
Optimizing these well are especially interesting for IRCE since it
"clamps" values by generating this sort of pattern through SCEV
expressions.

Depends on D9352.

Reviewers: majnemer

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D9353

llvm-svn: 236203

2015-04-30 04:56:04 +00:00

Sanjoy Das

82ea3d45b5

New instcombine rule: max(~a,~b) -> ~min(a, b)

This case is interesting because ScalarEvolutionExpander lowers min(a,
b) as ~max(~a,~b).  I think the profitability heuristics can be made
more clever/aggressive, but this is a start.

Differential Revision: http://reviews.llvm.org/D7821

llvm-svn: 230285

2015-02-24 00:08:41 +00:00

2 Commits