llvm-project

Commit Graph

Author	SHA1	Message	Date
Sanjay Patel	bfc7ffa40f	[DAGCombiner] don't hoist logic op if operands have other uses, part 2 The PPC test with 2 extra uses seems clearly better by avoiding this transform. With 1 extra use, we also prevent an extra register move (although that might be an RA problem). The general rule should be to only make a change here if it is always profitable. The x86 diffs are all neutral. llvm-svn: 348518	2018-12-06 19:18:56 +00:00
Sanjay Patel	273b778997	[PowerPC] add tests for hoisting bitwise logic; NFC llvm-svn: 348516	2018-12-06 19:05:19 +00:00

Author

SHA1

Message

Date

Sanjay Patel

bfc7ffa40f

[DAGCombiner] don't hoist logic op if operands have other uses, part 2

The PPC test with 2 extra uses seems clearly better by avoiding this transform. 
With 1 extra use, we also prevent an extra register move (although that might
be an RA problem). The general rule should be to only make a change here if
it is always profitable. The x86 diffs are all neutral.

llvm-svn: 348518

2018-12-06 19:18:56 +00:00

Sanjay Patel

273b778997

[PowerPC] add tests for hoisting bitwise logic; NFC

llvm-svn: 348516

2018-12-06 19:05:19 +00:00

2 Commits