search for: sdnodeproperty

...hat in DAG terminology, Flag is now called Glue. It would be nice for someone to go through and clean up the code as far as comments and variable names. That was driving me close to the brink of insanity till I found out about this. Even in Selection Dag Node Properties def SDNPOutGlue : SDNodeProperty; // Write a flag result def SDNPInGlue : SDNodeProperty; // Read a flag operand def SDNPOptInGlue : SDNodeProperty; // Optionally read a flag operand

...explain precisely what the ComplexPattern tablegen class does? Here's the first line of the definition (from TargetSelectionDAG.td) for reference: class ComplexPattern<ValueType ty, int numops, string fn, list<SDNode> roots = [], list<SDNodeProperty> props = [], list<CPAttribute> attrs = []> As far as I can tell it gives the name of a selection function (fn) that will be called to match that particular ComplexPattern. Should that function return true that pattern has matched. The match function can also...

Hello LLVM developers, Following some hints on this mailing list earlier this year on how to make clang faster than stock llvm.org builds I have implemented a script that builds a PGO optimized version of clang by following the guide here: http://llvm.org/docs/HowToBuildWithPGO.html This works great on macOS and Linux - we gained almost 15% in our project with this technique. I am now looking at

...here it does regress things. These are likely to be easy to find by looking for patterns that match sext. Doing #2 requires a plumbing these flags through the DAG. I don't yet know how hard that would be, but it doesn't sound too bad. The current approach I would probably take is to add an SDNodeProperty for NSW and NUW, and nodes for operations with those flags. But that means generalizing everything that currently only looks at ADD. There is probably a better way to express this in the DAG, so if this is the direction folks thing LLVM should go, point me at any ideas you have about how to best im...

...s things. These are likely to be easy to find by looking for patterns that match sext. >> >> Doing #2 requires a plumbing these flags through the DAG. I don't yet know how hard that would be, but it doesn't sound too bad. The current approach I would probably take is to add an SDNodeProperty for NSW and NUW, and nodes for operations with those flags. But that means generalizing everything that currently only looks at ADD. There is probably a better way to express this in the DAG, so if this is the direction folks thing LLVM should go, point me at any ideas you have about how to best im...