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Author	SHA1	Message	Date
Hal Finkel	840257a49c	Use AA in LoadCombine LoadCombine can be smarter about aborting when a writing instruction is encountered, instead of aborting upon encountering any writing instruction, use an AliasSetTracker, and only abort when encountering some write that might alias with the loads that could potentially be combined. This was originally motivated by comments made (and a test case provided) by David Majnemer in response to PR21448. It turned out that LoadCombine was not responsible for that PR, but LoadCombine should also be improved so that unrelated stores (and @llvm.assume) don't interrupt load combining. llvm-svn: 221203	2014-11-03 23:19:16 +00:00
Aaron Ballman	573f3b5313	Fixing a few -Woverloaded-virtual warnings by exposing the hidden virtual function as well. No functional changes intended. llvm-svn: 214325	2014-07-30 19:23:59 +00:00
Michael J. Spencer	289067cc3d	Add LoadCombine pass. This pass is disabled by default. Use -combine-loads to enable in -O[1-3] Differential revision: http://reviews.llvm.org/D3580 llvm-svn: 209791	2014-05-29 01:55:07 +00:00

Author

SHA1

Message

Date

Hal Finkel

840257a49c

Use AA in LoadCombine

LoadCombine can be smarter about aborting when a writing instruction is
encountered, instead of aborting upon encountering any writing instruction, use
an AliasSetTracker, and only abort when encountering some write that might
alias with the loads that could potentially be combined.

This was originally motivated by comments made (and a test case provided) by
David Majnemer in response to PR21448. It turned out that LoadCombine was not
responsible for that PR, but LoadCombine should also be improved so that
unrelated stores (and @llvm.assume) don't interrupt load combining.

llvm-svn: 221203

2014-11-03 23:19:16 +00:00

Aaron Ballman

573f3b5313

Fixing a few -Woverloaded-virtual warnings by exposing the hidden virtual function as well. No functional changes intended.

llvm-svn: 214325

2014-07-30 19:23:59 +00:00

Michael J. Spencer

289067cc3d

Add LoadCombine pass.

This pass is disabled by default. Use -combine-loads to enable in -O[1-3]

Differential revision: http://reviews.llvm.org/D3580

llvm-svn: 209791

2014-05-29 01:55:07 +00:00

3 Commits