llvm-project

Commit Graph

Author	SHA1	Message	Date
Manman Ren	1a5ff287fd	TBAA: remove !tbaa from testing cases if not used. This will make it easier to turn on struct-path aware TBAA since the metadata format will change. llvm-svn: 180796	2013-04-30 17:52:57 +00:00
Jakob Stoklund Olesen	5b8f476037	Correctly deal with identity copies in RegisterCoalescer. Now that the coalescer keeps live intervals and machine code in sync at all times, it needs to deal with identity copies differently. When merging two virtual registers, all identity copies are removed right away. This means that other identity copies must come from somewhere else, and they are going to have a value number. Deal with such copies by merging the value numbers before erasing the copy instruction. Otherwise, we leave dangling value numbers in the live interval. This fixes PR12927. llvm-svn: 157340	2012-05-23 20:21:06 +00:00

Author

SHA1

Message

Date

Manman Ren

1a5ff287fd

TBAA: remove !tbaa from testing cases if not used.

This will make it easier to turn on struct-path aware TBAA since the metadata
format will change.

llvm-svn: 180796

2013-04-30 17:52:57 +00:00

Jakob Stoklund Olesen

5b8f476037

Correctly deal with identity copies in RegisterCoalescer.

Now that the coalescer keeps live intervals and machine code in sync at
all times, it needs to deal with identity copies differently.

When merging two virtual registers, all identity copies are removed
right away. This means that other identity copies must come from
somewhere else, and they are going to have a value number.

Deal with such copies by merging the value numbers before erasing the
copy instruction. Otherwise, we leave dangling value numbers in the live
interval.

This fixes PR12927.

llvm-svn: 157340

2012-05-23 20:21:06 +00:00

2 Commits