Optimizer Report Generation (Itanium(TM) Compiler)

The Intel® Fortran Itanium(TM) Compiler for Itanium(TM)-based Applications provides options to generate and manage optimization reports.

-opt_report generates optimizations report and places it in a file specified in
-opt_report_filefilename . If -opt_report_file is not specified, -opt_report directs the report to stderr. The default is OFF: no reports are generated.

-opt_report_filefilename generates optimizations report and directs it to a file specified in   filename.

-opt_report_level{min|med|max} specifies the detail level of the optimizations report. The min argument provides the minimal summary and the max the full report. The default is
-opt_report_levelmin.

-opt_report_routineroutine_substring generates reports from all routines with names containing the substring as part of their name. If not specified, reports from all routines are generated. The default is to generate reports for all routines being compiled.

Specifying Optimizations to Generate Reports

The compiler can generate reports for an optimizer you specify in the phase argument of the
-opt_report_phasephase option.

The option can be used multiple times on the same command line to generate reports for multiple optimizers.

Currently, the following optimizer reports are supported:

Optimizer Logical Name

Optimizer Full Name

ipo

Interprocedural Optimizer

hlo

High Level Optimizer

ilo

Intermediate Language Scalar Optimizer

ecg

Electron Code Generator

omp

Open MP

all

All optimizers

When one of the above logical names for optimizers are specified all reports from that optimizer will be generated. For example, -opt_report_phaseipo  and -opt_report_phaseecg generate reports from the interprocedural optimizer and the code generator.

Each of the optimizers can potentially have specific optimizations within them.  Each of these optimizations are prefixed with one of the optimizer logical names. For example:

Optimizer_optimization

Full Name

ipo_inline

Interprocedural Optimizer, inline expansion of functions

ipo_constant_propagation

Interprocedural Optimizer, constant propagation

ipo_function_reoder

Interprocedural Optimizer, function reorder

ilo_constant_propagation

Intermediate Language Scalar Optimizer, constant propagation

ilo_copy_propagation

Intermediate Language Scalar Optimizer, copy propagation

ecg_software_pipelining

Electron Code Generator, software pipelining

The entire name for a particular optimization within an optimizer need not be specified in full, just a few characters is sufficient.  All optimization reports that have a matching prefix with the specified optimizer are generated. For example, if -opt_report_phase ilo_co is specified, a report from both the constant propagation and the copy propagation are generated.

The Availability of Report Generation

The -opt_report_help option lists the logical names of optimizers that are currently availble for report generation.