Displaying 5 results from an estimated 5 matches for "getimplicitus".
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getimplicituses
2009 Oct 22
4
[LLVMdev] request for help writing a register allocator
...t
including these in your calculations you will probably have some errors. My
apologies for not mentioning this earlier.
You can find the set of implicit uses and defs by querying the
TargetInstDesc object for each MachineInstr (call MachineInstr::getDesc() to
get it, and then the TargetInstrDesc::getImplicitUses() and
TargetInstrDesc::getImplicitDefs() methods to find the regs used/definied by
this instr).
2) How are you making sure that interfering virtregs never receive the same
physreg? If you're using the LiveIntervals analysis (and the
LiveInterval::overlaps(LiveInterval &) test) you should...
2009 Oct 22
0
[LLVMdev] request for help writing a register allocator
...r calculations you will probably have some errors.
> My apologies for not mentioning this earlier.
>
> You can find the set of implicit uses and defs by querying the
> TargetInstDesc object for each MachineInstr (call MachineInstr::getDesc() to
> get it, and then the TargetInstrDesc::getImplicitUses() and
> TargetInstrDesc::getImplicitDefs() methods to find the regs used/definied by
> this instr).
>
Oops. Seems we copy implicit operands like this into MachineOperands on the
instruction before register allocation. Disregard the above advice - you do
not need to check the TargetInstr...
2010 Apr 16
1
[LLVMdev] Delay Slot Filler
> You have to create one! Take a look at PPCHazardRecognizers.cpp
> and SPUHazardRecognizers.cpp for examples.
> If you can, contribute it back! :)
There is also generic hazard recognizer which works on top of
instruction itineraries.
--
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University
2009 Oct 21
0
[LLVMdev] request for help writing a register allocator
Lang -
I've made some progress writing my register allocator, but now I'm stuck.
I have 2 questions for you:
1. I tried running the PBQP allocator (as a dynamic pass), but that didn't
work. When I type this:
llc -f -load Debug/lib/regalloc.so -regalloc=pbqp simple.bc
I get the following error:
llc:
2009 Oct 20
7
[LLVMdev] request for help writing a register allocator
Hi Susan,
> You may find the PBQP allocator implementation useful as a reference
> to what's involved in adding a new allocator to LLVM. It's located in
> lib/CodeGen/RegAllocPBQP.cpp, with supporting files in the lib/CodeGen/
> PBQP directory.
>
Yes - as far as working allocators go PBQP is pretty simple. If you're just
interested in LLVM API details you can focus on