search for: movebefore

Hi, I'm getting a segmentation fault trying to write a small(incomplete) LICM pass whenever i try to do I->moveBefore(pre->getTerminator()); (wherer I is Instruction*, Pre is BasicBlock*) Is there any prerequisites for executing this function that i am not doing? Thanks in advance. sreeraj -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-...

...is Lattner <clattner at apple.com> wrote: > > On Nov 17, 2010, at 1:38 PM, Sreeraj a wrote: > > > Thanks Chris, > > > > I was able to weed out loop invariant arithmetic instructions using > isLoopInvariant function. > > when i try to do an instruction->moveBefore(bb->getTerminator()) i'm > getting a seg fault. > > any obvious reasons that i'm missing out on? > > No idea, sorry. > > -Chris > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/atta...

...later (that is I cannot create the function at the beginning stage become some info are not available yet). I tried to create a block without any "parent" (BasicBlock::Create(getGlobalContext(), "init"), fill it, but how to link it with the created function? (i read about "moveBefore" and "moveAfter" but these methods are not usable in this context... Thanks Stéphane Letz

...xecute()){ if(isLoopInvariantInst(*hijk)){ errs() << " " << *hijk << " is loop invariant\n"; errs() << " hoisting to " << pre->getName() << "\n"; // This is where all the trouble happens. hijk->moveBefore(pre->getTerminator()); changed=true; } } } return changed; } bool MyLoopPass::isLoopInvariantInst(Instruction &I) { // The instruction is loop invariant if all of its operands are loop-invariant for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) if (!curLoop-&gt...

Thanks Chris, I was able to weed out loop invariant arithmetic instructions using isLoopInvariant function. when i try to do an instruction->moveBefore(bb->getTerminator()) i'm getting a seg fault. any obvious reasons that i'm missing out on? Thanks in advance On Wed, Nov 17, 2010 at 10:41 PM, Chris Lattner <clattner at apple.com> wrote: > > On Nov 17, 2010, at 2:20 AM, Sreeraj a wrote: > > > Hi, > > I'...

...> wrote: > >> >> On Nov 17, 2010, at 1:38 PM, Sreeraj a wrote: >> >> > Thanks Chris, >> > >> > I was able to weed out loop invariant arithmetic instructions using >> isLoopInvariant function. >> > when i try to do an instruction->moveBefore(bb->getTerminator()) i'm >> getting a seg fault. >> > any obvious reasons that i'm missing out on? >> >> No idea, sorry. >> >> -Chris >> >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://l...

...loop doesn't write). >      if (L->hasLoopInvariantOperands(Inst) && >          !Inst->mayReadFromMemory() && !Inst->mayWriteToMemory() && >          !isa<TerminatorInst>(Inst) && !isa<DbgInfoIntrinsic>(Inst)) { >        Inst->moveBefore(LoopEntryBranch); >        continue; >      } > > The above code happily moves an alloca instruction out of the loop, to > the new loop header. Shouldn't we also check on > >   !isa<AllocaInst>(Inst) > > before allowing to move it? > > > The code that b...

...later (that is I cannot create the function at the beginning stage become some info are not available yet). I tried to create a block without any "parent" (BasicBlock::Create(getGlobalContext(), "init"), fill it, but how to link it with the created function? (i read about "moveBefore" and "moveAfter" but these methods are not usable in this context... You can use Function::getBasicBlockList(). That list supports fully general list operations like "insert", so you can just plop it in wherever you'd like it. -Chris

...later (that is I cannot create the function at the beginning stage become some info are not available yet). I tried to create a block without any "parent" (BasicBlock::Create(getGlobalContext(), "init"), fill it, but how to link it with the created function? (i read about "moveBefore" and "moveAfter" but these methods are not usable in this context... > > You can use Function::getBasicBlockList(). That list supports fully general list operations like "insert", so you can just plop it in wherever you'd like it. methods like the basic block co...

On Nov 17, 2010, at 1:38 PM, Sreeraj a wrote: > Thanks Chris, > > I was able to weed out loop invariant arithmetic instructions using isLoopInvariant function. > when i try to do an instruction->moveBefore(bb->getTerminator()) i'm getting a seg fault. > any obvious reasons that i'm missing out on? No idea, sorry. -Chris

Hello LLVM Developers, I'm trying to replace a function defined in one module into another module (different files). The first issue I ran into was that llvm::Function does not have a method "moveBefore" or "moveAfter" as the llvm::BasicBlock or llvm::Instruction do, so I figured I would just move the BasicBlocks of the replacing function into the function that was being replaced, and then eliminate the original BasicBlocks. So far I had only one issue while eliminating the original...

...proving that the loop doesn't write). if (L->hasLoopInvariantOperands(Inst) && !Inst->mayReadFromMemory() && !Inst->mayWriteToMemory() && !isa<TerminatorInst>(Inst) && !isa<DbgInfoIntrinsic>(Inst)) { Inst->moveBefore(LoopEntryBranch); continue; } The above code happily moves an alloca instruction out of the loop, to the new loop header. Shouldn't we also check on !isa<AllocaInst>(Inst) before allowing to move it? The code that breaks because of the moved alloca looks like start:...

Hi, I have two problems regarding the llvm.stackrestore intrinsic. I'm running on 3.0, but a quick test on trunk also showed the same behavior. First problem: --------------- I have code like: tmp1 = call llvm.stacksave() tmp2 = alloca [do some stuff with tmp2] call llvm.stackrestore(tmp1) [some other stuff] tmp3 = call llvm.stacksave() tmp4 = alloca [do some stuff

...7/2018 10:37 AM, Daniel Moya via llvm-dev wrote: > > Hello LLVM Developers, > > > > I'm trying to replace a function defined in one module into another > > module (different files). The first issue I ran into was that > > llvm::Function does not have a method "moveBefore" or "moveAfter" as > > the llvm::BasicBlock or llvm::Instruction do, so I figured I would > > just move the BasicBlocks of the replacing function into the function > > that was being replaced, and then eliminate the original BasicBlocks. > > Cross-module opera...

...v wrote: >>> > Hello LLVM Developers, >>> > >>> > I'm trying to replace a function defined in one module into another >>> > module (different files). The first issue I ran into was that >>> > llvm::Function does not have a method "moveBefore" or "moveAfter" as >>> > the llvm::BasicBlock or llvm::Instruction do, so I figured I would >>> > just move the BasicBlocks of the replacing function into the function >>> > that was being replaced, and then eliminate the original BasicBlocks. >...

On Nov 17, 2010, at 2:20 AM, Sreeraj a wrote: > Hi, > I'm trying to write a simple pass to print out Loop invariant instructions, using the > Loop::isLoopInvariant(Instruction *I) > function. it is giving me false value on instructions which should be loop invariant. > > the code i am using is: The isLoopInvariant method just works for scalar operations like

Hi, I'm trying to write a simple pass to print out Loop invariant instructions, using the Loop::isLoopInvariant(Instruction *I) function. it is giving me false value on instructions which should be loop invariant. the code i am using is: bool MyLoopPass::runOnLoop(Loop * L, LPPassManager &lpm){ BasicBlock* lat=L->getLoopLatch(); for (BasicBlock::iterator i = lat->begin(), e =

...LLVM Developers, >>>>> > >>>>> > I'm trying to replace a function defined in one module into another >>>>> > module (different files). The first issue I ran into was that >>>>> > llvm::Function does not have a method "moveBefore" or "moveAfter" as >>>>> > the llvm::BasicBlock or llvm::Instruction do, so I figured I would >>>>> > just move the BasicBlocks of the replacing function into the >>>>> function >>>>> > that was being replaced, and...

...gt;>>>> > I'm trying to replace a function defined in one module into >>>>>>> another >>>>>>> > module (different files). The first issue I ran into was that >>>>>>> > llvm::Function does not have a method "moveBefore" or "moveAfter" >>>>>>> as >>>>>>> > the llvm::BasicBlock or llvm::Instruction do, so I figured I would >>>>>>> > just move the BasicBlocks of the replacing function into the >>>>>>> function &g...

...he new llvm.eh.selector call. The code, at this point, could remove the exception argument from the old llvm.eh.selector call, but this treatment would not follow the replace semantics of pre-existing code. 2) The llvm.eh.selector is instead moved to the correct position (using llvm.Instruction.moveBefore(...)), with any necessary exception argument change. This version required a change in the control flow and is therefore larger addition to DwarfEHPrepare. Problems: Although the patch deals with the llvm.eh.selector's exception argument, it does not know how to deal with its other argument...