[LLVMdev] create two Twine object

Yuanfang Chen tabloid.adroit at gmail.com
Sat Apr 17 21:55:25 PDT 2010

I need to generate variables like

status1, status2, status3, ......
request1, request2, request3, ......

this is my code, other unrelated detail are eliminated.

static int varNum;
static const char *getVarNum() {
std::stringstream ss;
ss << varNum;
std::string *varname = new std::string(ss.str());
return varname->c_str();

const char *VarNum = getVarNum();
Twine *x1 = new Twine(StringRef("status"), VarNum);     //      1
Twine *x2 = new Twine(StringRef("request"), VarNum);    //     2

Instruction *sstatusInst = new AllocaInst(StatusTy, *x1, entry_inst);  //
Instruction *sreqInst = new AllocaInst(ReqTy, *x2, entry_inst);          //

with only 1&3,  my code works well, I can have status1, status2, status3,

with 1&2&3&4  exists at the same time,  it compiles without problem, but
segmentation fault happens.

Instruction *sreqInst = new AllocaInst(ReqTy, "request", entry_inst);    //
with 1&2&3&5,  everything work, but that's not what I want.

I really can't figure out what is broken. I create everything new on the
Each alloca inst with its own Twine object on the heap. Could anyone help me
out?  Thanks a lot.

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