llvm dev - Aug 2004 - [LLVMdev] is this code really JITed and/or optimized ? ..

> If it's that slow, you're probably getting the interpreter instead
of the
> JIT.  Try adding -print-machineinstr to the command line, or -debug, and
> see what happens.  If you're not getting the JIT, try stepping through
the
> LLVM program to see where it makes the execution engine and decides which
> one to use...
(thanks for quick reply)

hm, here is the part of my code starting LLVM function:

///////////////////////////
  ExistingModuleProvider* MP = new ExistingModuleProvider(M);
  ExecutionEngine* EE = ExecutionEngine::create( MP, true );

  // Call the `foo' function with no arguments:
  std::vector<GenericValue> noargs;
  GenericValue gv = EE->runFunction(FooF, noargs);
///////////////////////////

for LLVM developers no debuging should be needed to make
quick and right diagnosis :)

--
Valery

On Sat, 14 Aug 2004, Valery A.Khamenya wrote:
> hm, here is the part of my code starting LLVM function:
>
> ///////////////////////////
>   ExistingModuleProvider* MP = new ExistingModuleProvider(M);
>   ExecutionEngine* EE = ExecutionEngine::create( MP, true );
As Reid pointed out, changing true to false will get it to work.
>   // Call the `foo' function with no arguments:
>   std::vector<GenericValue> noargs;
>   GenericValue gv = EE->runFunction(FooF, noargs);
> ///////////////////////////
>
> for LLVM developers no debuging should be needed to make
> quick and right diagnosis :)
Sure, but part of our goal is to get you to learn more about how stuff
works too :)

-Chris

-- 
http://llvm.org/
http://nondot.org/sabre/

> >   ExecutionEngine* EE = ExecutionEngine::create( MP, true ); 
> As Reid pointed out, changing true to false will get it to work.
hm, well, "false" causes Segmentation fault.

> > for LLVM developers no debuging should be needed to make
> > quick and right diagnosis :)
> 
> Sure, but part of our goal is to get you to learn more about how stuff
> works too :)
LOL, i deleted few lines from my previous mail before send i.r.t. this your 
idea, which is well-known to me :)

Actually my LLVM is compiled with no debug info. Newly compiled LLVM
with debug support will be after ~45min :-/

--
V.
local time 1:00am

> >   ExecutionEngine* EE = ExecutionEngine::create( MP, true );
> 
> As Reid pointed out, changing true to false will get it to work.
as I've posted already, I got Segmentation Fault.
Now, i have re-compiled LLVM with debug support.

The evaluation is broken at line 78 in file:
lib/ExecutionEngine/JIT/JIT.cpp

The assertion 

    assert(ArgValues.size() == 1);

fails. But what's wrong? My function has type

int FooF(void);

so ArgValues should have size 0, right?

BTW, the code of runFunction is quite unclear, indeed,
for some reason cases ArgValues==3 and ArgValues==1
are specially considered... I looked in JIT.h for
more description on interface -- quite ascetic info, 
nothing interesting.

Anyway, few lines of documentation could make life easier
for other guys too.

Thanks in advance,
--
Valery.