54 Commits

Author	SHA1	Message	Date
Chris Lattner	f8a5bb0f89	Emulate the current isel's "IsChainCompatible" logic for now. ... I'd like to eventually rip it out, but for now producing the same selections as the old matcher is more important. llvm-svn: 96458	2010-02-17 06:23:39 +00:00
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	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