[LLVMdev] llc and debug information

[Nick Jalbert]

Thanks for the quick responses, but unfortunately still no luck:
> llvm-g++ -g -O0 -c -emit-llvm test.cpp
> llc -O0 test.o
> g++ test.o.s
> ./a.out
My return address is 0x400bb2
> addr2line 0x400bb2
??:0

Also to further implicate llc, this works:

> llvm-g++ -g -O0 -S test.cpp
> g++ test.s
> ./a.out
My return address is 0x400bf9
> addr2line 0x400bf9
/home/jalbert/llvmtest//test.cpp:13

Anymore thoughts?

-Nick


On Wed, Sep 16, 2009 at 2:29 PM, Devang Patel <devang.patel at gmail.com>wrote:

> On Wed, Sep 16, 2009 at 1:34 PM, Nick Jalbert <jalbert at eecs.berkeley.edu>
> wrote:
> > Hi all,
> > I'm having an issue with debug information and llc.  A test program:
> > #include <iostream>
> > using namespace std;
> > void foo() {
> >     cout << "My return address is " << __builtin_return_address(0) <<
> >         endl << flush;
> > }
> > int main(int argc, char *argv[]) {
> >     foo();
> >     return 0;
> > }
> >
> > When I compile my test program to LLVM bytecode, and then use llc to take
> > the bytecode to assembly, llc appears to strip the debugging information
> > along the way:
> >> llvm-g++ -g -c -emit-llvm test.cpp
> >> llc test.o
>
> try -O0 in llc command line.
> -
> Devang
>
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