search for: select_cc_

...possible for a selection dag to represent more than one machine basic block. I think Christopher Lamb had some code that did some of this, but I don't know how far he got. The way we currently work around this is with a "custom scheduler insertion hook". For example, see how SELECT_CC_* works on PPC: at isel time we claim that we have the operation, then the scheduler invokes a virtual function to insert it, which expands out into multiple MBBs. -Chris

It's yet another CellSPU thing: integer division is a long code sequence we have to insert that has branches within it (test for 0 divisor, etc.) Can't really emit the sequence of instructions via tblgen (can't have labels or BBs). The other alternative is a custom instruction emitter. Life could be easier if I could insert BRCONDs and other branches from within

...lection dag to represent more than > one machine basic block. I think Christopher Lamb had some code that > did some of this, but I don't know how far he got. > > The way we currently work around this is with a "custom scheduler > insertion hook". For example, see how SELECT_CC_* works on PPC: at > isel time we claim that we have the operation, then the scheduler > invokes a virtual function to insert it, which expands out into > multiple MBBs. > > -Chris > _______________________________________________ > LLVM Developers mailing list > LLVMdev at c...