search for: addmachinelateoptim

Eli Friedman <eli.friedman at gmail.com> writes: >> Ah. So is the MachineFunction version expected to work correctly? > > It's part of the default set of CodeGen passes. It is? Was that true in 3.1? I can't see where it is initialized in llc. I probably missed something important. :) Thanks! -David

...TargetPassConfig::addMachineSSAOptimization() { // Pre-ra tail duplication. if (addPass(EarlyTailDuplicateID) != &NoPassID) printAndVerify("After Pre-RegAlloc TailDuplicate"); /// Add passes that optimize machine instructions after register allocation. void TargetPassConfig::addMachineLateOptimization() { // Branch folding must be run after regalloc and prolog/epilog insertion. if (addPass(BranchFolderPassID) != &NoPassID) printAndVerify("After BranchFolding"); // Tail duplication. if (addPass(TailDuplicateID) != &NoPassID) printAndVerify("After Tai...

...want your pass to live and sticking in some logic like this in there: if (getOptLevel() != CodeGenOpt::None) addPass(&MyPassID); A lot of passes are added in just TargetPassConfig::addMachinePasses(), but some live in more specialized areas like, for the sake of example, TargetPassConfig::addMachineLateOptimization(). You can add it wherever seems best for your specific pass. Hope that helps! Jessica Paquette > On Jan 5, 2017, at 8:12 AM, via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > I want the optimization to be turned on at -O1 and above. > In my case, it is a target inde...

...nd sticking in some logic like this in there: > > if (getOptLevel() != CodeGenOpt::None) > addPass(&MyPassID); > > A lot of passes are added in just TargetPassConfig::addMachinePasses(), but some live in more specialized areas like, for the sake of example, TargetPassConfig::addMachineLateOptimization(). You can add it wherever seems best for your specific pass. > > Hope that helps! > > Jessica Paquette > >> On Jan 5, 2017, at 8:12 AM, via llvm-dev <llvm-dev at lists.llvm.org> wrote: >> >> I want the optimization to be turned on at -O1 and above....

I want the optimization to be turned on at -O1 and above. In my case, it is a target independent back-end pass. (Eg: MachinePipeliner) On 2017-01-04 18:10, Mehdi Amini wrote: >> On Jan 4, 2017, at 4:03 PM, Sumanth Gundapaneni via llvm-dev >> <llvm-dev at lists.llvm.org> wrote: >> >> I see the BackendUtil.cpp of Clang creates the TargetMachine with >> the

...gt;> > >> if (getOptLevel() != CodeGenOpt::None) > >> addPass(&MyPassID); > >> > >> A lot of passes are added in just TargetPassConfig::addMachinePasses(), > but some live in more specialized areas like, for the sake of example, > TargetPassConfig::addMachineLateOptimization(). You can add it wherever > seems best for your specific pass. > >> > >> Hope that helps! > >> > >> Jessica Paquette > >> > >>> On Jan 5, 2017, at 8:12 AM, via llvm-dev <llvm-dev at lists.llvm.org> > wrote: > >>&g...

In our generated asm code we've got a constraint such that two registers in a ternary op have to be in different "banks", best illustrated with an example: add r1,r2,r1 # r1 <- r2 + r1 The problem here is that the first operand (the receiver of the value) is in the same "bank" as the 3rd operand (r1 again). This will cause an extra cycle to be burned. As it turns