You can use the -guide option to generate GAP advice. From a directory where you can compile the sample program, execute make vec from the command-line, or execute:
ifort -c -guide scalar_dep.f90
The GAP Report appears in the compiler output. GAP reports are encapsulated with GAP REPORT LOG OPENED and END OF GAP REPORT LOG.
GAP REPORT LOG OPENED ON Mon Aug 2 14:04:34 2010 remark #30761: Add -parallel option if you want the compiler to generate recommendations for improving auto-parallelization. scalar_dep.f90(44): remark #30515: (VECT) Loop at line 44 cannot be vectorized due to conditional assignment(s) into the following variable(s): t. This loop will be vectorized if the variable(s) become unconditionally initialized at the top of every iteration. [VERIFY] Make sure that the value(s) of the variable(s) read in any iteration of the loop must have been written earlier in the same iteration. Number of advice-messages emitted for this compilation session: 1. END OF GAP REPORT LOG
