llvm dev - May 2011 - [LLVMdev] How does Timer work?

I slightly modified the Kaleidoscope example to print the timing data using
the NamedRegionTimer as below:

  // Run the main "interpreter loop" now.
  {
  const char *GroupName = "MainLoop";
  NamedRegionTimer T("Kaleidoscope", GroupName, true);
  MainLoop();
  }

My assumption was that when T goes out of scope, it will emit the data on
the command line. But I see nothing.
How does NamedRegionTimer work ?

- sanjiv
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ping.

On Mon, May 9, 2011 at 10:20 PM, Sanjiv <llvmdev at gmail.com> wrote:
> I slightly modified the Kaleidoscope example to print the timing data using
> the NamedRegionTimer as below:
>
>   // Run the main "interpreter loop" now.
>   {
>   const char *GroupName = "MainLoop";
>   NamedRegionTimer T("Kaleidoscope", GroupName, true);
>   MainLoop();
>   }
>
> My assumption was that when T goes out of scope, it will emit the data on
> the command line. But I see nothing.
> How does NamedRegionTimer work ?
>
> - sanjiv
>
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Hi Sanjiv,
> On Mon, May 9, 2011 at 10:20 PM, Sanjiv <llvmdev at gmail.com
> <mailto:llvmdev at gmail.com>> wrote:
>
>     I slightly modified the Kaleidoscope example to print the timing data
using
>     the NamedRegionTimer as below:
>
>        // Run the main "interpreter loop" now.
>        {
>        const char *GroupName = "MainLoop";
>        NamedRegionTimer T("Kaleidoscope", GroupName, true);
>        MainLoop();
>        }
>
>     My assumption was that when T goes out of scope, it will emit the data
on
>     the command line. But I see nothing.
>     How does NamedRegionTimer work ?
I think you only get output if you run with the -time-passes option.  Also, I
think info is only output when the program exits, not immediately.

Ciao, Duncan.