llvm dev - Aug 2019 - Global variables in C

Hi All,

For our requirement ,we are creating the global variables like
GlobalValue *GV = new GlobalVariable(M, Type::getInt32Ty(*Context), false,
                                       GlobalValue::ExternalLinkage, nullptr,
                                       Name);

where "Name" is the global name with "Extern or Internal"
Linkage .

Say "Name=foo" is already in the Module and when we try to create
"GlobalVariable" Instance  again for "Name=foo" ,the current
semantics
of GlobalVariable() is that ,it renames like "foo.<random
number>" i.e
"foo.10" .

Currently we are overriding this semantics  by iterating the
Module.globals() and if "Name"doesn't exist ,the we are creating
the
new instance else we get the reference to it .

Is that better way to do so ?

Thank you
~Umesh

Hi Umesh,

On Fri, 30 Aug 2019 at 18:43, Umesh Kalappa via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> Currently we are overriding this semantics  by iterating the
> Module.globals() and if "Name"doesn't exist ,the we are
creating the
> new instance else we get the reference to it .
It sounds like you want Module::getOrInsertGlobal.

Cheers.

Tim.