similar to: [LLVMdev] Distinguishing Pointer Variable and Ordinary Variable

Check it's type to see if it's a pointer or not? On 1 September 2013 12:31, Abhinash Jain <omnia at mailinator.com> wrote: > C Code :- > int main() > { > int a=10,c; > int *b; > c=20; > *b=a; > return 0; > } > > IR of above code :- > define i32 @main() #0 { > entry: > 1. %retval = alloca i32, align 4 > 2. %a = alloca i32, align 4

Sorry I have actually edited the post. I did check its type by using isa<PointerType>(cast<AllocaInst>(instr->getOperand(1))->getAllocatedType()) but it is only detecting i32** %b on line 8 of IR as a pointer type. Whereas I also want to detect the i32* %1 on line 11 of IR as a pointer type. So how can I do this?? -- View this message in context:

Hi, On 1 September 2013 15:47, Abhinash Jain <omnia at mailinator.com> wrote: > Sorry I have actually edited the post. This is primarily an e-mail list; the vast majority of us won't see any edits (on some web mirror?). > I did check its type by using > isa<PointerType>(cast<AllocaInst>(instr->getOperand(1))->getAllocatedType()) > but it is only detecting

Your last statement is correct. But still my stand does not change. I want to differentiate ordinary local variable & pointer variables. Let's have a program, int a,b,c,*ptr; I want to extract only the local variables. That's what my question was. I think it is clear now. cast<PointerType>(A->getType() > > )->getElementType() is not working. I am also getting error

How to recognize pointer variable & ordinary variable? I have tried with "isa<PointerType>(V->getType())", but failed. -- regards, soumya prasad ukil -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20100722/8a751551/attachment.html>

Hi Soumya_Prasad_Ukil, > How to recognize pointer variable & ordinary variable? I have tried with > "isa<PointerType>(V->getType())", but failed. I'm not sure what you are asking, but if you are asking whether an alloca instruction A represents local memory of pointer type, you can use A->getAllocatedType(). You can also use

> in LLVM IR, the operands of most expression are registers, so don't have a memory address. Yes I agree with your this statement, But before becoming part of the expressions, the registers will actually fetch some value from memory, through Load operations. as shown in example "r3=r1+r2" will be the expression, where registers such as r1 and r2 contains (fetch) the values from

@Jim Grosbach, Is there anyway to resolve it??? -- View this message in context: http://llvm.1065342.n5.nabble.com/LLVM-ERROR-Invalid-instruction-tp59856p59865.html Sent from the LLVM - Dev mailing list archive at Nabble.com.

How to get memory address of all operands which constitutes an expression ? eg. a=b+c; (want to know the memory address of b and c)...... Since I want this at run time, So at assembly level this expression will become something like as follows:- Load r1, M[b] Load r2, M[c] r3=r1+r2 store M[a],r3 Now what i want to do is that, at every store instruction, I should get the memory address of all

On Mon, Jun 17, 2013 at 11:49 PM, Abhinash Jain <omnia at mailinator.com>wrote: > > But before becoming part of the expressions, the registers will actually > fetch some value from memory, through Load operations. > This is not true; the virtual registers need not be loaded from memory. You may find <

How can I get the name of the virtual Registers present on an instruction. eg. %add18 = add nsw i32 %mul17, %37 in this case I want to extract the name of the virutal registers as "add18", "mul17","37". This can easily be done in the case of store Instruction eg. store i32 %add20, i32* %t, align 4 in this case functions like

I want to present different view depending on the url. example below: http://myapp/start/show?url=xZq http://myapp/xZq both addresses are controlled by a single controller and the same action. the second url is only mapped in routes.rb how can I distinguished the mapped url and present a slightly different view in it? Sabon -------------- next part -------------- An HTML attachment was

Hi All, On my llvm pass I have some variable named "expr" which is being declared as :- string expr; // or char *expr; // Now I want to pass this "expr" to some external function. How can I do this?? Similarly, How can I pass variable "var" to an external function which is being decalred as :- Vector<int> var; Any help will be

#include <string> #include <string.h> #include <iostream> #include <stdio.h> using namespace std; void foo(string str) { } int main() { string str="aa"; foo(str); return 0; } 1. clang++ -c -emit-llvm foo.cpp -o foo.ll 2. llc -march=cpp -o foo.ll.cpp foo.ll (at the execution of this command its giving an error as "Invalid Instruction") May I know why

I did some computation through llvm pass, and store those computed values on string. eg. :- stringstream lhs; lhs << instr->getOperand(1); // 'instr' is some instruction string lhsvar=lhs.str(); Now I want to pass this 'lhsvar' to the external function, so how can i do this??? This is just the part of a code to make you understand. if you say I can even provide the

On Apr 21, 2008, at 15:07, John Criswell wrote: >> 1. For getting ALL struct allocation, when I use >> >> if( (AI = dyn_cast<AllocaInst>(&*i))) >> if(AI->getOperand(0)->getType()->getTypeID() == >> Type::StructTyID) { >> >> to get all alloca instructions allocating a structure, it does not >> work. In my gdb

I have one file named hashtable.cpp whose link is "http://pastebin.com/Cq2Qy50C" and one llvm pass named testing.cpp whose link is "http://pastebin.com/E3RemxLF" Now on this testing.cpp pass I have computed the string named "expr" which I want to pass to the function named hashtable(string) in hashtable.cpp (on line 106 of testing.cpp) > looking at simple

Thanx for the response. %x = alloca i32, align 4 %y = alloca i32, align 4 %a = alloca i32, align 4 %t = alloca i32, align 4 1. %10 = load i32* %x, align 4 2. %11 = load i32* %y, align 4 3. %div = sdiv i32 %10, %11 4. %12 = load i32* %a, align 4 5. %mul4 = mul nsw i32 %div, %12 6. store i32 %mul4, i32* %t, align 4 a. %mul4 = mul nsw i32 %div, %12 b. %div = sdiv i32 %10, %11 c. %10 =

> OK - seems you might want to take a few steps back & understand how > C++ code is written/structured generally (and/or take a look at other > parts of the compiler). You'll need a header file with the declaration > of your function & you can include that header file in the > hashtable.cpp and testing.cpp - if that sentence doesn't make sense to > you yet, please

Hi John, Thank you a lot. That clarifies some my confusions. What I want to do is to use both methods, get ALL struct allocation and a SPECIFIC struct allocation, at different situations. Here, I've got a couple of more questions. 1. For getting ALL struct allocation, when I use if( (AI = dyn_cast<AllocaInst>(&*i)))