llvm-project

Commit Graph

Author	SHA1	Message	Date
Tim Northover	01b4aa9437	ARM: tell LLVM about zext properties of ldrexb/ldrexh Implementing this via ComputeMaskedBits has two advantages: + It actually works. DAGISel doesn't deal with the chains properly in the previous pattern-based solution, so they never trigger. + The information can be used in other DAG combines, as well as the trivial "get rid of truncs". For example if the trunc is in a different basic block. rdar://problem/16227836 llvm-svn: 205540	2014-04-03 15:10:35 +00:00
Tim Northover	1ff5f29fb5	ARM: add intrinsics for the v8 ldaex/stlex We've already got versions without the barriers, so this just adds IR-level support for generating the new v8 ones. rdar://problem/16227836 llvm-svn: 204813	2014-03-26 14:39:31 +00:00

Author

SHA1

Message

Date

Tim Northover

01b4aa9437

ARM: tell LLVM about zext properties of ldrexb/ldrexh

Implementing this via ComputeMaskedBits has two advantages:
  + It actually works. DAGISel doesn't deal with the chains properly
    in the previous pattern-based solution, so they never trigger.
  + The information can be used in other DAG combines, as well as the
    trivial "get rid of truncs". For example if the trunc is in a
    different basic block.

rdar://problem/16227836

llvm-svn: 205540

2014-04-03 15:10:35 +00:00

Tim Northover

1ff5f29fb5

ARM: add intrinsics for the v8 ldaex/stlex

We've already got versions without the barriers, so this just adds IR-level
support for generating the new v8 ones.

rdar://problem/16227836

llvm-svn: 204813

2014-03-26 14:39:31 +00:00

2 Commits