54 Commits

Author	SHA1	Message	Date
Chris Lattner	f8695c1ee9	convert the new matcher to check intermediate nodes for a single ... use and only call IsProfitableToFold/IsLegalToFold on the load being folded, like the old dagiselemitter does. This substantially simplifies the code and improves opportunities for sharing. llvm-svn: 96368	2010-02-16 19:15:55 +00:00
Chris Lattner	5ce8303950	generate code for node and pattern predicates. Note that this won't ... build if enabled, it will fail with constness issues. I'll resolve these next. llvm-svn: 96336	2010-02-16 07:21:10 +00:00
Chris Lattner	aa7d3e096b	add support for the new isel matcher to generate ... (isprofitable|islegal)tofold checks. llvm-svn: 96331	2010-02-16 06:10:58 +00:00
Chris Lattner	b02cdaaa9c	Check in the first big step of rewriting DAGISelEmitter to ... produce a table based matcher instead of gobs of C++ Code. Though it's not done yet, the shrinkage seems promising, the table for the X86 ISel is 75K and still has a lot of optimization to come (compare to the ~1.5M of .o generated the old way, much of which will go away). The code is currently disabled by default (the #if 0 in DAGISelEmitter.cpp). When enabled it generates a dead SelectCode2 function in the DAGISel Header which will eventually replace SelectCode. There is still a lot of stuff left to do, which are documented with a trail of FIXMEs. llvm-svn: 96215	2010-02-15 08:04:42 +00:00