search for: regsubidxmap

...the SSARegMap to point subregisters to the superregister they were coalesced to (IIRC). That has since gone away. I used to use that in my code to return the correct live interval for a virtual register in the case where a subregister extract was coalesced. That information appears to now be in RegSubIdxMap, which is local to runOnMachineFunction, so it's lost after the coalescer runs. Do I not need to worry about this information anymore? Thanks. -Dave

...rect live interval for a virtual register in > the case > where a subregister extract was coalesced. Right. That has been removed because it's surprisingly painful to maintain that information. Now subreg index lives on MachineOperand. > > That information appears to now be in RegSubIdxMap, which is local to > runOnMachineFunction, so it's lost after the coalescer runs. Do I > not need > to worry about this information anymore? That's used at the end of coalescing to rewrite virtual registers. It's purely local information. Evan > > Thanks. > &gt...

...s surprisingly painful to > maintain that information. Now subreg index lives on MachineOperand. Yep, I saw that. Does the subregh index in the MachineOperand tell the asm printer what name to output for a register operand? How else is it used? > > That information appears to now be in RegSubIdxMap, which is local to > > runOnMachineFunction, so it's lost after the coalescer runs. Do I > > not need > > to worry about this information anymore? > > That's used at the end of coalescing to rewrite virtual registers. > It's purely local information. Ok, I s...