Chris Lattner ff89aeda21 Improve ValueAlreadyLiveAtInst with a cheap and dirty, but effective ... heuristic: the value is already live at the new memory operation if it is used by some other instruction in the memop's block. This is cheap and simple to compute (moreso than full liveness). This improves the new heuristic even more. For example, it cuts two out of three new instructions out of 255.vortex:DbmFileInGrpHdr, which is one of the functions that the heuristic regressed. This overall eliminates another 40 instructions from 403.gcc and visibly reduces register pressure in 255.vortex (though this only actually ends up saving the 2 instructions from the whole program). llvm-svn: 60084		2008-11-26 03:20:37 +00:00
..
Hello	Initial support for the CMake build system.	2008-09-22 01:08:49 +00:00
Instrumentation	Use Function::getEntryBlock() instead of Function::front(), for clarity.	2008-10-21 03:10:28 +00:00
IPO	Fix error where it wasn't getting the correct caller function.	2008-11-21 00:09:21 +00:00
Scalar	Improve ValueAlreadyLiveAtInst with a cheap and dirty, but effective	2008-11-26 03:20:37 +00:00
Utils	reapply Sanjiv's patch to genericize memcpy/memset/memmove to take an	2008-11-21 16:42:48 +00:00
Makefile	remove attribution from lib Makefiles.	2007-12-29 20:09:26 +00:00