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6 Commits

Author SHA1 Message Date
Philip Reames 3c4614ff10 Add a couple of extra test noticed in post-commit discussion of rL369541 
llvm-svn: 369546
 2019-08-21 16:57:53 +00:00
Philip Reames 764b0fd5a3 [instcombine] icmp eq/ne (sub C, Y), C -> icmp eq/ne Y, 0 
Noticed while looking at pr43028.  

llvm-svn: 369541
 2019-08-21 15:51:57 +00:00
Eric Christopher cee313d288 Revert "Temporarily Revert "Add basic loop fusion pass."" 
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552
 2019-04-17 04:52:47 +00:00
Eric Christopher a863435128 Temporarily Revert "Add basic loop fusion pass." 
As it's causing some bot failures (and per request from kbarton).

This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.

llvm-svn: 358546
 2019-04-17 02:12:23 +00:00
Luqman Aden 8911c5be46 [InstCombine] Combine no-wrap sub and icmp w/ constant. 
Teach InstCombine the transformation `(icmp P (sub nuw|nsw C2, Y), C) -> (icmp swap(P) Y, C2-C)`

Reviewers: majnemer, apilipenko, sanjoy, spatel, lebedev.ri

Reviewed By: lebedev.ri

Subscribers: dmgreen, lebedev.ri, nikic, hiraditya, JDevlieghere, jfb, jdoerfert, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D59916

llvm-svn: 357674
 2019-04-04 07:08:30 +00:00
Luqman Aden 7c67dbdc65 [NFC][InstCombine] Add tests for combining icmp of no-wrap sub w/ constant. 
llvm-svn: 357360
 2019-03-31 08:58:50 +00:00