Hi All,
Can we extract name of variable name from "MDNode" ?
1. Neither temp_MDNode->getName() nor temp_MDNode->getValueName() give me
"global_int" which is name of a variable.
2. I tried below ways as well.
DIVariable DV(mdnode1);
Value *v = mdnode1->getOperand(0);//gives add 0x69
3. I have written below code to reach till variable name.
LLVMIname is
const CallInst *CI = dyn_cast<CallInst>(Insn);
const Value* LLVMIValue =
cast<CallInst>(Insn)->getCalledValue();
const Function *LLVMIFunc= dyn_cast<Function>(LLVMIValue);
if( LLVMIname.compare("llvm.dbg.declare") == 0 )
{
int x = 0;
int numoperands = CI->getNumArgOperands();
for( unsigned i = 0; i != numoperands; ++i)
{
Value *v = CI->getOperand(i);
if( i == 1) //points to metadata for variable name
{
MDNode *mdnode = (MDNode *)CI->getOperand(1);
int numoperds= mdnode->getNumOperands();//4 operands
for( unsigned x = 0; x != numoperds; ++x)
{
Value *v = mdnode->getOperand(x);
if( x == 2)//name of variable
{
MDNode *mdnode1 = (MDNode
*)mdnode->getOperand(2);//mdnode1->dump() gives variable name.
std::pair<unsigned, MDNode *> mynode(
Insn->getDebugLoc().getLine(), mdnode1);
linenum_varmdnode.push_back( mynode);
//DIVariable DV(mdnode1);//not working
//Value *v = mdnode1->getOperand(0);//, not
working. gives add 0x69
}
}//for operands mdnode
}
}//for operands mdnode
3. When I give "temp_MDNode->dump()" on gdb, it displays below
output ==>
metadata !"global_int"
If I can collect this in a string, that too is OK for me.
Thanks & Regards,
Pankaj
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Closing this, found below links to get variable name.
http://groups.google.com/group/llvm-dev/browse_thread/thread/1a239f0d24db2b5c
http://markmail.org/message/fj5qg44vyjsdde7k#query:+page:1+mid:5zhmyncisenomcga+state:results
I could do following, to get the required information.
const CallInst *CI = dyn_cast<CallInst>(Insn);
int numoperands = CI->getNumArgOperands();
for( unsigned i = 0; i != numoperands; ++i)
{
Value *v = CI->getOperand(i);
MDNode *temp = (MDNode *)CI->getOperand(1) ;
DIVariable DV(temp);//TO CHECK. remove later
StringRef varName = DV.getName();
const char *tmpvarname = varName.data();
if( i == 1) //points to metadata for variable name
{
Sorry for posting trivial question.
Regards,
Pankaj
________________________________
From: Pankaj Gode <godepankaj at yahoo.com>
To: llvm Developers <llvmdev at cs.uiuc.edu>
Sent: Monday, October 17, 2011 5:38 PM
Subject: [LLVMdev] Variable name from metadata
Hi All,
Can we extract name of variable name from "MDNode" ?
1. Neither temp_MDNode->getName() nor temp_MDNode->getValueName() give me
"global_int" which is name of a variable.
2. I tried below ways as well.
DIVariable DV(mdnode1);
Value *v = mdnode1->getOperand(0);//gives add 0x69
3. I have written below code to reach till variable name.
LLVMIname is
const CallInst *CI = dyn_cast<CallInst>(Insn);
const Value* LLVMIValue =
cast<CallInst>(Insn)->getCalledValue();
const Function *LLVMIFunc= dyn_cast<Function>(LLVMIValue);
if( LLVMIname.compare("llvm.dbg.declare") == 0 )
{
int x = 0;
int numoperands = CI->getNumArgOperands();
for( unsigned i = 0; i != numoperands; ++i)
{
Value *v = CI->getOperand(i);
if( i == 1) //points to metadata for variable name
{
MDNode *mdnode = (MDNode *)CI->getOperand(1);
int numoperds= mdnode->getNumOperands();//4 operands
for( unsigned x = 0; x != numoperds; ++x)
{
Value *v = mdnode->getOperand(x);
if( x == 2)//name of variable
{
MDNode *mdnode1 = (MDNode
*)mdnode->getOperand(2);//mdnode1->dump() gives variable name.
std::pair<unsigned, MDNode *> mynode(
Insn->getDebugLoc().getLine(), mdnode1);
linenum_varmdnode.push_back( mynode);
//DIVariable DV(mdnode1);//not working
//Value *v = mdnode1->getOperand(0);//, not
working. gives add 0x69
}
}//for operands mdnode
}
}//for operands mdnode
3. When I give "temp_MDNode->dump()" on gdb, it displays below
output ==>
metadata !"global_int"
If I can collect this in a string, that too is OK for me.
Thanks & Regards,
Pankaj
_______________________________________________
LLVM Developers mailing list
LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
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Pankaj,
You could simply do
if (const CallInst *CI = dyn_cast<CallInst>(Insn))
if (const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(Insn)) {
DIVariable DV = DDI->getVariable();
StringRef VarName = DV.getName();
}
Now, StringRef has various operators so you could most likely use it directly.
-
Devang
On Oct 17, 2011, at 5:47 AM, Pankaj Gode wrote:
> Closing this, found below links to get variable name.
>
>
http://groups.google.com/group/llvm-dev/browse_thread/thread/1a239f0d24db2b5c
>
>
http://markmail.org/message/fj5qg44vyjsdde7k#query:+page:1+mid:5zhmyncisenomcga+state:results
>
> I could do following, to get the required information.
> const CallInst *CI = dyn_cast<CallInst>(Insn);
> int numoperands = CI->getNumArgOperands();
> for( unsigned i = 0; i != numoperands; ++i)
> {
> Value *v = CI->getOperand(i);
> MDNode *temp = (MDNode *)CI->getOperand(1) ;
> DIVariable DV(temp);//TO CHECK. remove later
> StringRef varName = DV.getName();
> const char *tmpvarname = varName.data();
> if( i == 1) //points to metadata for variable name
> {
>
> Sorry for posting trivial question.
>
> Regards,
> Pankaj
>
>
> From: Pankaj Gode <godepankaj at yahoo.com>
> To: llvm Developers <llvmdev at cs.uiuc.edu>
> Sent: Monday, October 17, 2011 5:38 PM
> Subject: [LLVMdev] Variable name from metadata
>
> Hi All,
>
> Can we extract name of variable name from "MDNode" ?
>
> 1. Neither temp_MDNode->getName() nor temp_MDNode->getValueName()
give me "global_int" which is name of a variable.
>
> 2. I tried below ways as well.
> DIVariable DV(mdnode1);
> Value *v = mdnode1->getOperand(0);//gives add 0x69
>
> 3. I have written below code to reach till variable name.
>
> LLVMIname is
>
> const CallInst *CI = dyn_cast<CallInst>(Insn);
> const Value* LLVMIValue =
cast<CallInst>(Insn)->getCalledValue();
> const Function *LLVMIFunc=
dyn_cast<Function>(LLVMIValue);
>
> if( LLVMIname.compare("llvm.dbg.declare") == 0 )
> {
> int x = 0;
> int numoperands = CI->getNumArgOperands();
> for( unsigned i = 0; i != numoperands; ++i)
> {
> Value *v = CI->getOperand(i);
> if( i == 1) //points to metadata for variable name
> {
> MDNode *mdnode = (MDNode *)CI->getOperand(1);
> int numoperds= mdnode->getNumOperands();//4
operands
> for( unsigned x = 0; x != numoperds; ++x)
> {
> Value *v = mdnode->getOperand(x);
> if( x == 2)//name of variable
> {
> MDNode *mdnode1 = (MDNode
*)mdnode->getOperand(2);//mdnode1->dump() gives variable name.
> std::pair<unsigned, MDNode *> mynode(
Insn->getDebugLoc().getLine(), mdnode1);
> linenum_varmdnode.push_back( mynode);
>
> //DIVariable DV(mdnode1);//not working
> //Value *v = mdnode1->getOperand(0);//, not
working. gives add 0x69
> }
> }//for operands mdnode
> }
> }//for operands mdnode
> 3. When I give "temp_MDNode->dump()" on gdb, it displays below
output ==>
> metadata !"global_int"
> If I can collect this in a string, that too is OK for me.
>
>
> Thanks & Regards,
> Pankaj
>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
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