similar to: [LLVMdev] Passing ConstantDataArray to GetElementPtrInst

Hi all, How can I create an llvm::GetElementPtrInst in which the pointer and the index are in registers previously loaded with llvm::LoadInst ? I mean, the generated instruction will be like this: %1 = getelementptr i8* %myreg1, i32 %myreg2 here, %myreg1 and %myreg2 are previously created by load instructions (llvm::LoadInst). Please, let me know if there is an example of something similar.

On Sat, Apr 20, 2013 at 5:15 PM, Richard Catlin <richard.m.catlin at gmail.com>wrote: > I extended the LLVM Kaleidoscope example to support Strings. I added a > StringExprAST, which has the virtual Codegen method impl as follows: > > Value *StringExprAST::Codegen() { > StringRef r(Val); > return ConstantDataArray::getString(getGlobalContext(), r, false); > } >

I extended the LLVM Kaleidoscope example to support Strings. I added a StringExprAST, which has the virtual Codegen method impl as follows: Value *StringExprAST::Codegen() { StringRef r(Val); return ConstantDataArray::getString(getGlobalContext(), r, false); } I am trying to concatenate Strings and have a ConcatExprAST with its Codegen method. Upon trying to access the data in the

ConstantDataArray * cda = cast<ConstantDataArray>(v); throws this error: Assertion failed: (isa<X>(Val) && "cast<Ty>() argument of incompatible type!"), function cast, file /Users/rcatlin1/lldb/llvm/include/llvm/Support/Casting.h, line 208 Thanks for the help. Richard Catlin On Sat, Apr 20, 2013 at 3:37 PM, Sean Silva <silvas at purdue.edu> wrote:

Hi, In llvm 3.0 llvm::ConstantArray had a ::getAsCString() method that returned the buffer as a std::string. Now it seems that 3.1 this method dissapeared. I found that llvm::ConstantDataArray has a method called getAsString(), but it returns a Constant*. What is the safe way to retrieve the pointer of the Constant array as a C string?

On 16 November 2012 13:55, charles quarra <charllsnotieneningunputocorreo at gmail.com> wrote: > In llvm 3.0 llvm::ConstantArray had a ::getAsCString() method that > returned the buffer as a std::string. Now it seems that 3.1 this > method dissapeared. > > I found that llvm::ConstantDataArray has a method called > getAsString(), but it returns a Constant*. In 3.1

Hi all, I have a global array declared as: table = internal constant [8 x [256 x i32]] ... At the moment I'm able to get the reference to table using Constant* g_var = cast<GlobalVariable>(I.getOperand(0))->getInitializer(); ( please consider I to be a GetElementPtrInst object ). Now I would like to understand how to get the address of table[2][3], for instance, considering that I

I'm wonder if anyone happens to have a simplier (slower) version of bsd-snprintf.c. It seems NeXT 3.3 (unsure about 4.2) is missing mprotect(). If I could get something to replace that for a while and fix some of theses utmp in login.c issues I may have a rough port NeXT to black hardware.=) Thanks

/* * Copyright (c) 1983, 1995, 1996 Eric P. Allman * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of

Hi, You'd use an IRBuilder, like you did to create your LoadInsts. IRBuilder<> IRB(BB); IRB.CreateGEP(myreg1, myreg2); I assume because you asked this question, something went wrong when using the above method. What was it? :) Cheers, James ________________________________________ From: llvmdev-bounces at cs.uiuc.edu [llvmdev-bounces at cs.uiuc.edu] On Behalf Of Eduardo [erocha.ssa

Hi James, Thanks for your quick reply. > I assume because you asked this question, something went wrong when using the above method. What was it? :) No, I am not using this method. I was trying to create a llvm::GetElementPtrInst . I didn't create IRBuilder. I am writing a ModulePass that insert new instruction to an existing Module. Besides, how can you get a reference to myreg1 ?

Hello; Thanks to Eli for the pointer to the ConstantDataArray::getString() fucntion. Now I am trying to declare a global char array with the content "hi" and call a function "print" (which takes a char pointer and return an insteger. I am doing the following in the code - Function Creation: PointerType* array = PointerType::get(IntegerType::getInt8Ty(getGlobalContext())

On Sat, Sep 9, 2017 at 10:18 PM, Chris Lattner via llvm-dev < llvm-dev at lists.llvm.org> wrote: > > On Sep 7, 2017, at 11:06 PM, Chris Lovett via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > I'm running into some pretty bad performance in llc.exe when compiling > some large neural networks into code that contains some very large llvm::ConstantDataArrays,

I'm running into some pretty bad performance in llc.exe when compiling some large neural networks into code that contains some very large llvm::ConstantDataArrays, some are { size=102,760,448 }. There's a small about of actual code for processing the network, but the assembly is mostly global data. I'm finding that llc.exe memory spikes up around 30 gigabytes and the job takes 20-30

The GEP constructor does not assert that the source and destination types match. Of course, this is incorrect and causes random failures somewhere down the line. Could I add general sanity checks to the GEP constructor? In general, is an Instruction allowed to be in an inconsistent state? If so, is there some well known method to "verify" whether an instruction is consistent or not?

On Fri, 2003-11-21 at 14:35, Chris Lattner wrote: > On Fri, 21 Nov 2003, Reid Spencer wrote: > > When I set up the call, I get the following from that pesky :) verifier: > > Ah, but it's so helpful! :) It is actually. It is ensuring that my compiler is correct which is one of the hardest things to do! > > So, in LLVM are arrays and pointers not equivalent as in

If I dump the Value of GetElementPtrInst->getPointerOperand(), I got this: %a = alloca [10 x i32], align 16 Obviously, there should be a way to get the dimension and element type via the "Value" returned from GetElementPtrInst->getPointerOperand(), but how? What kind of "Value" is this? Thanks! Welson -------------- next part -------------- An HTML attachment was

Hi Pankaj, your best bet is to send the entire bitcode before and after instcombine runs. Ciao, Duncan.

On Fri, 21 Nov 2003, Reid Spencer wrote: > I'm trying to set up a call to printf in stacker and have managed to > confuse myself. Perhaps you can shed some light. :) > I've declared printf as a function taking a pointer to SByteTy with var > args and returning SIntTy: Sounds good. > When I set up the call, I get the following from that pesky :) verifier: Ah, but

I'm trying to set up a call to printf in stacker and have managed to confuse myself. Perhaps you can shed some light. I've declared printf as a function taking a pointer to SByteTy with var args and returning SIntTy: > // Create a function for output (int printf(format,...)) > std::vector<Type*> params; > params.push_back( PointerType::get( Type::SByteTy ) );