llvm-project

Commit Graph

Author	SHA1	Message	Date
Daniel Dunbar	b9ea94c990	Eliminate uses of %prcontext. - I'd appreciate it if someone else eyeballs my changes to make sure I captured the intent of the test. llvm-svn: 81083	2009-09-05 11:35:16 +00:00
Evan Cheng	1a99a5f501	It has finally happened. Spiller is now using live interval info. This fixes a very subtle bug. vr defined by an implicit_def is allowed overlap with any register since it doesn't actually modify anything. However, if it's used as a two-address use, its live range can be extended and it can be spilled. The spiller must take care not to emit a reload for the vn number that's defined by the implicit_def. This is both a correctness and performance issue. llvm-svn: 69743	2009-04-21 22:46:52 +00:00

Author

SHA1

Message

Date

Daniel Dunbar

b9ea94c990

Eliminate uses of %prcontext.

- I'd appreciate it if someone else eyeballs my changes to make sure I captured
   the intent of the test.

llvm-svn: 81083

2009-09-05 11:35:16 +00:00

Evan Cheng

1a99a5f501

It has finally happened. Spiller is now using live interval info.

This fixes a very subtle bug. vr defined by an implicit_def is allowed overlap with any register since it doesn't actually modify anything. However, if it's used as a two-address use, its live range can be extended and it can be spilled. The spiller must take care not to emit a reload for the vn number that's defined by the implicit_def. This is both a correctness and performance issue.

llvm-svn: 69743

2009-04-21 22:46:52 +00:00

2 Commits