search for: pr768

...+ offset > [virtual_register] > > and then have 'virtual_register' allocated on next iteration of register > allocator? This is one approach. Another approach is to have to spiller scavange registers, which is the subject of this enhancement request: http://llvm.org/PR768 > Also, while RegAllocLocal and RegAllocSimple directly call > storeRegToStackSlot, I would not found any calls to that method in > RegAllocLinearScan. Am I missing something? RegAllocLinearScan just does register assignment, then the code in VirtRegMap.cpp (poorly named) actually takes...

Hi, right now, LLVM does register spilling by: 1. Creating stack object 2. Passing index of that stack object to MRegisterInfo::storeRegToStackSlot 3. At later stage, frame indices are replaced by calling to MRegisterInfo::eliminateFrameIndex. This works for me, but there's slight problem. The target does not have "register + contant" addressing mode, so accessing frame index

...ris Lattner wrote: >> and then have 'virtual_register' allocated on next iteration of register >> allocator? > > This is one approach. Another approach is to have to spiller scavange > registers, which is the subject of this enhancement request: > http://llvm.org/PR768 Can you given some references for this "scavange" thing? Google and ResearchIndex are silent on the topic. >> Also, while RegAllocLocal and RegAllocSimple directly call >> storeRegToStackSlot, I would not found any calls to that method in >> RegAllocLinearScan. Am I mi...