search for: globaladdresssdnode

I am again calling for help from LLVM developers ;) For my DSP backend, at the lowering stage and also at the AsmPrinter stage, I need to know if a GlobalAddress is a code or a data address. So I tried at the lowering stage to use: GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op); const GlobalValue *GV = GSDN->getGlobal(); GV->hasSection() and GV->getSection() But the section is not set at this stage (hasSection = false) And at the AsmPrinter stage: const GlobalValue *GV = MO.getGlobal(); SectionKind sectionKind = Mang...

...assert(!isVarArg); bool isTailCall = cast<ConstantSDNode>(Op.getOperand(3))->getValue() != 0; SDOperand Callee = Op.getOperand(4); MVT::ValueType RetVT= Op.Val->getValueType(0); unsigned NumOps = (Op.getNumOperands() - 5) / 2; std::string Name; if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) Name = G->getGlobal()->getName(); else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) Name = S->getSymbol(); unsigned opcode = funcname_to_opc[Name]; assert(opcode != 0 && "Unknown fu...

...lvm at gmail.com>wrote: > > I am again calling for help from LLVM developers ;) > > For my DSP backend, at the lowering stage and also at the AsmPrinter stage, > I need to know if a GlobalAddress is a code or a data address. > > So I tried at the lowering stage to use: > GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op); > const GlobalValue *GV = GSDN->getGlobal(); > GV->hasSection() and GV->getSection() > But the section is not set at this stage (hasSection = false) > > And at the AsmPrinter stage: > const GlobalValue *GV = MO.getGlobal(); &...

...independently of the other changes. > > That said, I don’t understand why you’d keep ConstantSDNode around and > introduce a new derived class of it. This seems like something that a new > “imm" immediate matcher would handle: it would match constants in a certain > range, or a GlobalAddressSDNode known-to-be-small. > To begin with: I'm not sure that GlobalAddressSDNode is the right node to use for these types of immediates. It seems that we have two broad classes of globals here: those with a fixed-at-link-time address (e.g. regular non-PIC symbols, absolute symbols) and those where...

...t;< 23) && ResultPtr < (1 << 23) && "Relocation out of range!"' Right? But on OS X you don't have this messsage? Here's a temporary fix until I find time to investigate on this: In function PPCISelLowering::LowerCALL, comment the lines: if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) Callee = DAG.getTargetGlobalAddress(G->getGlobal(), Callee.getValueType()); This will force an indirect call, and won't use the jump-size limitation of the bl instruction. Let me know if this helps. Cheers, Nicolas Jan Rehders wrote...

...gt; > I am again calling for help from LLVM developers ;) > > For my DSP backend, at the lowering stage and also at the > AsmPrinter stage, I need to know if a GlobalAddress is a code or a > data address. > > So I tried at the lowering stage to use: > GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op); > const GlobalValue *GV = GSDN->getGlobal(); > GV->hasSection() and GV->getSection() > But the section is not set at this stage (hasSection = false) > > And at the AsmPrinter stage: > const GlobalValue *GV...

Hi, attached is a small testcase I did. It builds two LLVM functions which both call two native functions get5 and get6. The native functions are in the exe and in the dll. On OS X it works like a charm. On Linux none of the two functions can be called. Maybe someone can try them or have a look at it to see if there is something obviously wrong greetings, Jan -------------- next part

...lCall = cast<ConstantSDNode>(Op.getOperand(3))- > >getValue() != 0; > SDOperand Callee = Op.getOperand(4); > MVT::ValueType RetVT= Op.Val->getValueType(0); > unsigned NumOps = (Op.getNumOperands() - 5) / 2; > > std::string Name; > if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode> > (Callee)) > Name = G->getGlobal()->getName(); > else if (ExternalSymbolSDNode *S = > dyn_cast<ExternalSymbolSDNode>(Callee)) > Name = S->getSymbol(); > > unsigned opcode = funcname_to_opc[Name]; > ass...

I had the same issue as both of you when I was implementing this for my backend. In LowerCall you can get the callee prototype info when the Callee SDValue is a GlobalAddressSDNode doing cast<Function>(G->getGlobal()) (where G is GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)), but this won't work when it is a ExternalSymbolSDNode, for that case i had to add additional info into the ISD::OutputArg struct to know the real size of the splitted...

...other changes. >> >> That said, I don’t understand why you’d keep ConstantSDNode around and >> introduce a new derived class of it. This seems like something that a new >> “imm" immediate matcher would handle: it would match constants in a certain >> range, or a GlobalAddressSDNode known-to-be-small. >> > > To begin with: I'm not sure that GlobalAddressSDNode is the right node to > use for these types of immediates. It seems that we have two broad classes > of globals here: those with a fixed-at-link-time address (e.g. regular > non-PIC symbols, absol...

Every GlobalAddress has a GlobalValue, Every GlobalValue is a PointerType, Every PointerType has an AddressSpace. So is it ok to add a method getAddressSpace in GlobalAddressSDNode class itself? Currently we have to do GSDN->getGlobal()->getType()->getAddressSpace(). - Sanjiv

Is there a way to find the IR that corresponds to a callee DAG node? In other words to get the function definition, attributes, etc.? Tia. Reed

On 04/28/2013 09:49 PM, reed kotler wrote: > Is there a way to find the IR that corresponds to a callee DAG node? > > In other words to get the function definition, attributes, etc.? > > Tia. > > Reed It looks like you can do this by: 1) getParent will return the Module that some global value is in 2) in Module, getFunction will return the function

...managed to resolve this same problem by using custom C++ code since as you mentioned the isSplit flag doesn't help here. There are 2 ways to analyze the arguments of a function: 1) You can get a Function pointer in LowerFormalArguments, and in LowerCall only when Callee can by dyn_casted to a GlobalAddressSDNode. By having this pointer you can then do: for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();I != E; ++I) { unsigned Bytes = TD->getTypeSizeInBits(I->getType()) / 8; // do stuff here } 2) The second case is when the dyn_cast above fails because the Cal...

...evious message for various attempts and their results) I will submit two bug reports when I receive my bugzilla password Greetings, Jan > Here's a temporary fix until I find time to investigate on this: > > In function PPCISelLowering::LowerCALL, comment the lines: > > if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) > Callee = DAG.getTargetGlobalAddress(G->getGlobal(), > Callee.getValueType()); > > This will force an indirect call, and won't use the jump-size > limitation > of the bl instruction. > > Let me know if this help...

...gt;(Op.getOperand(3))- > > >getValue() != 0; > > SDOperand Callee = Op.getOperand(4); > > MVT::ValueType RetVT= Op.Val->getValueType(0); > > unsigned NumOps = (Op.getNumOperands() - 5) / 2; > > > > std::string Name; > > if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode> > > (Callee)) > > Name = G->getGlobal()->getName(); > > else if (ExternalSymbolSDNode *S = > > dyn_cast<ExternalSymbolSDNode>(Callee)) > > Name = S->getSymbol(); > > > > unsigned opcode =...

...128 unsigned int Is64Bit true bool HasLow4GUserAddress true bool TargetType isWindows llvm::X86Subtarget::<unnamed-tag> if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) { // We should use extra load for direct calls to dllimported functions in // non-JIT mode. // it get's into here if ((IsTailCall || !Is64Bit || // both these are false getTargetMachine().getCodeModel() != CodeMode...

...ode<"BfinISD::Wrapper", SDTIntUnaryOp>; Then custom lower ISD::GlobalAddress, converting it to a wrapped TargetGlobalAddress: SDValue BlackfinTargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) { DebugLoc DL = Op.getDebugLoc(); GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal(); Op = DAG.getTargetGlobalAddress(GV, MVT::i32); return DAG.getNode(BfinISD::Wrapper, DL, MVT::i32, Op); } Now you can pattern match on the wrapper: def : Pat<(BfinWrapper (i32 tglobaladdr:$addr)), (LOAD32imm tglobaladdr:$addr)>; If you think this i...

Hello, I am learning to write a new backend for LLVM and have a few simple questions. 1) What are the differences between 'constant' and 'targetconstant', 'globaladdress' and 'targetglobaladdress'? It is not clear from the document when and which should be used. 2) On the processor I am working on, there is a 'move reg, mem_addr' instruction. When I try

Hi all, I wanted to summarise some discussion on llvm-commits [0,1] as an RFC, as I felt it demanded wider circulation. Our support for references to absolute symbols is not very good. The symbol will be resolved accurately in non-PIC code, but suboptimally: the symbol reference cannot currently appear as the immediate operand of an instruction, and the code generator cannot make any assumptions