406 Commits

Author	SHA1	Message	Date
Chris Lattner	1c4bddc50d	* Pull out the meat of runOnModule into another function for clarity. ... * Do not lead dangling dead constants prevent optimization * Iterate global optimization while we're making progress. These changes allow us to be more aggressive, handling cases like GlobalOpt/iterate.llx without a problem (turning it into 'ret int 0'). llvm-svn: 16857	2004-10-08 20:59:28 +00:00
Chris Lattner	73ad73e2d8	We might as well delete the known-dead global sooner rather than later since ... we know it is dead. llvm-svn: 16855	2004-10-08 20:25:55 +00:00
Chris Lattner	abab0719af	Implement SRA for global variables. This allows the other global variable ... optimizations to trigger much more often. This allows the elimination of several dozen more global variables in Programs/External. Note that we only do this for non-constant globals: constant globals will already be optimized out if the accesses to them permit it. This implements Transforms/GlobalOpt/globalsra.llx llvm-svn: 16842	2004-10-08 17:32:09 +00:00
Chris Lattner	617f1a34f1	Improve comments, no functionality changes ... llvm-svn: 16814	2004-10-07 21:30:30 +00:00
Chris Lattner	02b6c918b7	Fix a bug in the safety analysis routine ... llvm-svn: 16804	2004-10-07 06:01:25 +00:00
Chris Lattner	25db58032d	* Rename pass to globalopt, since we do more than just constify ... * Instead of handling dead functions specially, just nuke them. * Be more aggressive about cleaning up after constification, in particular, handle getelementptr instructions and constantexprs. * Be a little bit more structured about how we process globals. *** Delete globals that are only stored to, and never read. These are clearly not useful, so they should go. This implements deadglobal.llx This last one triggers quite a few times. In particular, 2208 in the external tests, 1865 of which are in 252.eon. This shrinks eon from 1995094 to 1732341 bytes of bytecode. llvm-svn: 16802	2004-10-07 04:16:33 +00:00