llvm-project

Commit Graph

Author	SHA1	Message	Date
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
Guozhi Wei	c21fba1bab	[LoopSink] Add preheader to alias set This patch fixes PR39695. The original LoopSink only considers memory alias in loop body. But PR39695 shows that instructions following sink candidate in preheader should also be checked. This is a conservative patch, it simply adds whole preheader block to alias set. It may lose some optimization opportunity, but I think that is very rare because: 1 in the most common case st/ld to the same address, the load should already be optimized away. 2 usually preheader is not very large. Differential Revision: https://reviews.llvm.org/D54659 llvm-svn: 347325	2018-11-20 16:49:07 +00:00

Author

SHA1

Message

Date

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

Guozhi Wei

c21fba1bab

[LoopSink] Add preheader to alias set

This patch fixes PR39695.

The original LoopSink only considers memory alias in loop body. But PR39695 shows that instructions following sink candidate in preheader should also be checked. This is a conservative patch, it simply adds whole preheader block to alias set. It may lose some optimization opportunity, but I think that is very rare because: 1 in the most common case st/ld to the same address, the load should already be optimized away. 2 usually preheader is not very large. 

Differential Revision: https://reviews.llvm.org/D54659

llvm-svn: 347325

2018-11-20 16:49:07 +00:00

3 Commits