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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:

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

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); > } >

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, I'm having a hard time finding an answer to what I assume is a very basic idea. I'm trying to produce this llvm code using the LLVM api: %myString = alloca [13 x i8], i32 13 store [13 x i8] c"Hello world.\00", [13 x i8]* %myString %tmp1 = getelementptr [13 x i8]* %myString, i32 0, i32 0 %tmp2 = call i32 (i8*, ...)* @printf( i8* %tmp1 ) nounwind A simple Hello

...ts.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, > 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. > > > Yes, llvm’s representation of constant arrays is insanity for cases like > this. Your case is bad, but just imagine the cost of a...

Hi, I am trying to update the initializer of a global value and I have encounter two issues: The first one is that I can not change the type of the global value. Let say that I have the following variable: @.str = private unnamed_addr constant [6 x i8] c”Test0A\00", align 1 How can I change the ”Test0A\00” to ”OtherTest0A\00”. Is this possible? I know that you can change the initializer

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 minutes compiling from bitcode. When I looked into it I found that...

Hi Good day. For the following function local static constant array: static const __attribute__((used)) __attribute__((section("data"))) void *codetable[] = { &&RETURN, &&INCREMENT, &&DECREMENT, &&DOUBLE, &&SWAPWORD}; I have the following in the LLVM IR. @sampleCode.codetable = internal global [5 x i8*] [i8* blockaddress(@sampleCode, %19), i8*

Hi, When I run opt on the following LLVM IR: define i32 @foo() { bb0: %0 = bitcast i32 2139171423 to float %1 = insertelement <1 x float> undef, float %0, i32 0 %2 = extractelement <1 x float> %1, i32 0 %3 = bitcast float %2 to i32 ret i32 %3 } -> It generates: define i32 @foo() { bb0: ret i32 2143365727 } While tracking the value I see that the floating point value

Sorry for emailing both group. As I will have a constant array of BlockAddress, what type I should use in Constant Array for its ArrayType declaration? I am creating the list in following way: unsigned int nBr = fit->second.size(); llvm::Constant *listBA[nBr]; unsigned int Idx = 0; for (std::set<llvm::BasicBlock *>::iterator it = fit->second.begin(); it != fit->second.end(); ++it)

Hi Mehdi, Thank you for you answer. > Yes it is normal you *have* to use the same context to manipulate IR inside a Module. The context owns the module and destroying the context destroys everything that is created in the context. It is not clear to me what other context you could even manage to use here conceptually. Actually I was using llvm::getGlobalContext() in order to get the context.

Hello, I'm trying to get the pointer to the first element of a string (so that I can pass it to a function). The string itself is a constant kept in a global variable. My end goal is to generate the IR for something like "puts("Hello World")"; I'm stuck on the parameter part of the call instruction. So far I have something like this: const std::string& str =

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

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 Tue, May 8, 2012 at 7:16 PM, Albert Graef <Dr.Graef at t-online.de> wrote: > Now I've run into another issue: The ConstantArray::get() method for > constructing a string  constant from a char* seems to be gone. Is there > a replacement for that somewhere? ConstantDataArray::getString. IRBuilder::CreateGlobalString might also be useful in some cases. > BTW, this isn't

Hello ! This may be a trivial question, but I cannot get fields from a Value type. If my Value is i32 1, how can I store 1 in a different structure (an integer) ? For the type, I have getType(). For the value, I see no method in Value.h. I tried to cast to ConstantExpr and then to get operands, or cast to ConstantDataArray and then use getAsString(), but is not working. How should I get the

Hi Cristianno, Thank you, it works :) with an extra cast:                                     Value *v ......                                     ConstantInt* RR = (ConstantInt *)v;                                     uint64_t VV = (RR->getValue()).getLimitedValue();                                     errs()<<"\nRR  "<<VV<<"\n";

Ok, now it's arising another problem. IR code that I obtain is the following: i8* bitcast ([5 x i8] c"hello\00" to i8*) generated from instructions: ConstantExpr::getBitCast (ConstantDataArray::getString (getGlobalContext (), "hello"), PointerType::get (Type::getInt8Ty (getGlobalContext ()), 0)) but the LLC tool says: invalid cast opcode for cast from '[5 x i8]'