llvm-project

Commit Graph

Author	SHA1	Message	Date
Evan Cheng	852c486946	Make 91378 more conservative. 1. Only perform (zext (shl (zext x), y)) -> (shl (zext x), y) when y is a constant. This makes sure it remove at least one zest. 2. If the shift is a left shift, make sure the original shift cannot shift out bits. llvm-svn: 91399	2009-12-15 03:00:32 +00:00
Evan Cheng	ca7c690d3b	Propagate zest through logical shift. llvm-svn: 91378	2009-12-15 00:41:36 +00:00

Author

SHA1

Message

Date

Evan Cheng

852c486946

Make 91378 more conservative.

1. Only perform (zext (shl (zext x), y)) -> (shl (zext x), y) when y is a constant. This makes sure it remove at least one zest.
2. If the shift is a left shift, make sure the original shift cannot shift out bits.

llvm-svn: 91399

2009-12-15 03:00:32 +00:00

Evan Cheng

ca7c690d3b

Propagate zest through logical shift.

llvm-svn: 91378

2009-12-15 00:41:36 +00:00

2 Commits