OSchip
/
llvm-project
mirror of https://github.com/THU-DSP-LAB/llvm-project.git
13
0
Fork 6
Code Issues Packages Projects Releases Wiki Activity
365,615 Commits 31 Branches 0 Tags 2.2 GiB
Commit Graph

8 Commits

Author SHA1 Message Date
Nikita Popov e086e23024 [InstCombine] Support non-splat vectors in icmp eq + add/sub fold 
For the

    icmp eq (add X, C1), C2 => icmp eq X, C2-C1
    icmp eq (sub C1, X), C2 => icmp eq X, C1-C2

folds, this allows C1 to be non-splat and contain undefs.
C2 is still splat, due to the structure of the code.

This is to address the remaining part of the regression in D73411,
where demanded element analysis replaces some elements with undef.

Differential Revision: https://reviews.llvm.org/D73647
 2020-01-29 20:56:58 +01:00
Nikita Popov 5171587a5f [InstCombine] Add undef/non-splat tests for add/sub + icmp eq; NFC 2020-01-29 20:56:58 +01:00
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