llvm-project

Commit Graph

Author	SHA1	Message	Date
Chris Lattner	c009757761	Enhance SROA to "promote to scalar" allocas which are memcpy/memmove'd into or out of. This fixes a serious perf issue that Nate ran into. llvm-svn: 66366	2009-03-08 04:04:21 +00:00
Chris Lattner	6ff85681e4	Fix PR2369 by making scalarrepl more careful about promoting structures. Its default threshold is to promote things that are smaller than 128 bytes, which is sane. However, it is not sane to do this for things that turn into 128 registers. Add a cap on the number of registers introduced, defaulting to 128/4=32. llvm-svn: 52611	2008-06-22 17:46:21 +00:00

Author

SHA1

Message

Date

Chris Lattner

c009757761

Enhance SROA to "promote to scalar" allocas which are

memcpy/memmove'd into or out of.  This fixes a serious
perf issue that Nate ran into.

llvm-svn: 66366

2009-03-08 04:04:21 +00:00

Chris Lattner

6ff85681e4

Fix PR2369 by making scalarrepl more careful about promoting

structures.  Its default threshold is to promote things that are
smaller than 128 bytes, which is sane.  However, it is not sane
to do this for things that turn into 128 *registers*.  Add a cap
on the number of registers introduced, defaulting to 128/4=32.

llvm-svn: 52611

2008-06-22 17:46:21 +00:00

2 Commits