[llvm] r196183 - Added MachineBlockFrequencyInfo::view for displaying the block frequency propagation graph via graphviz.

[Meador Inge]

On 12/02/2013 06:49 PM, Michael Gottesman wrote:

> Author: mgottesman
> Date: Mon Dec  2 18:49:33 2013
> New Revision: 196183
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=196183&view=rev
> Log:
> Added MachineBlockFrequencyInfo::view for displaying the block frequency propagation graph via graphviz.
> 
> This is useful for debugging issues in the BlockFrequency implementation
> since one can easily visualize where probability mass and other errors
> occur in the propagation.
> 
> This is the MI version of r194654.

Nice.

> +static cl::opt<GVDAGType>
> +ViewMachineBlockFreqPropagationDAG("view-machine-block-freq-propagation-dags",
> +                                   cl::Hidden,
> +          cl::desc("Pop up a window to show a dag displaying how machine block "
> +                   "frequencies propgate through the CFG."),

s/propgate/propagate/

> +          cl::values(
> +            clEnumValN(GVDT_None, "none",
> +                       "do not display graphs."),
> +            clEnumValN(GVDT_Fraction, "fraction", "display a graph using the "
> +                       "fractional block frequency representation."),
> +            clEnumValN(GVDT_Integer, "integer", "display a graph using the raw "
> +                       "integer fractional block frequency representation."),
> +            clEnumValEnd));


-- 
Meador Inge
CodeSourcery / Mentor Embedded