llvm-project

Commit Graph

Author	SHA1	Message	Date
Sanjay Patel	62da6ecea2	[InstCombine] substitute equivalent constant to reduce logic-of-icmps (X == C) && (Y Pred1 X) --> (X == C) && (Y Pred1 C) (X != C) \|\| (Y Pred1 X) --> (X != C) \|\| (Y Pred1 C) This cooperates/overlaps with D78430, but it is a more general transform that gets us most of the expected simplifications and several other improvements. http://volta.cs.utah.edu:8080/z/5gxjjc PR45618: https://bugs.llvm.org/show_bug.cgi?id=45618 Differential Revision: https://reviews.llvm.org/D78582	2020-04-23 10:19:16 -04:00
Sanjay Patel	44a8c5410e	[InstCombine] add tests for logic-of-icmps; NFC These are mostly replicated from D78430 (instsimplify). If we implement more general transforms for instcombine, then we probably don't need to add that complexity to instsimplify.	2020-04-21 12:26:45 -04:00

Author

SHA1

Message

Date

Sanjay Patel

62da6ecea2

[InstCombine] substitute equivalent constant to reduce logic-of-icmps

(X == C) && (Y Pred1 X) --> (X == C) && (Y Pred1 C)
(X != C) || (Y Pred1 X) --> (X != C) || (Y Pred1 C)

This cooperates/overlaps with D78430, but it is a more general transform
that gets us most of the expected simplifications and several other
improvements.
http://volta.cs.utah.edu:8080/z/5gxjjc

PR45618:
https://bugs.llvm.org/show_bug.cgi?id=45618

Differential Revision: https://reviews.llvm.org/D78582

2020-04-23 10:19:16 -04:00

Sanjay Patel

44a8c5410e

[InstCombine] add tests for logic-of-icmps; NFC

These are mostly replicated from D78430 (instsimplify).
If we implement more general transforms for instcombine,
then we probably don't need to add that complexity to instsimplify.

2020-04-21 12:26:45 -04:00

2 Commits