llvm-project

Commit Graph

Author	SHA1	Message	Date
Chris Lattner	6b657aed33	Enhance a bunch of transformations in instcombine to start generating exact/nsw/nuw shifts and have instcombine infer them when it can prove that the relevant properties are true for a given shift without them. Also, a variety of refactoring to use the new patternmatch logic thrown in for good luck. I believe that this takes care of a bunch of related code quality issues attached to PR8862. llvm-svn: 125267	2011-02-10 05:36:31 +00:00
Dale Johannesen	0171dc30ff	When checking that the necessary bits are zero in order to reduce ((x<<30)>>24) to x<<6, check the correct bits. PR 8547. llvm-svn: 118665	2010-11-10 01:30:56 +00:00

Author

SHA1

Message

Date

Chris Lattner

6b657aed33

Enhance a bunch of transformations in instcombine to start generating

exact/nsw/nuw shifts and have instcombine infer them when it can prove
that the relevant properties are true for a given shift without them.

Also, a variety of refactoring to use the new patternmatch logic thrown
in for good luck.  I believe that this takes care of a bunch of related
code quality issues attached to PR8862.

llvm-svn: 125267

2011-02-10 05:36:31 +00:00

Dale Johannesen

0171dc30ff

When checking that the necessary bits are zero in

order to reduce ((x<<30)>>24) to x<<6, check the
correct bits.  PR 8547.

llvm-svn: 118665

2010-11-10 01:30:56 +00:00

2 Commits