HPC Magazine February 2014 - An Introduction to Performance Programming - part I.

Listing 5: Compiling the original version of the "riemann" function in the Hydro application.

HydroC/oaccHydroC_2DMPI/Src$ icc -std=c99 -O3 -vec-report2 -Wno-unknown-pragmas -S
riemann.c
riemann.c(51): (col. 3) remark: LOOP WAS VECTORIZED.
riemann.c(138): (col. 14) remark: loop was not vectorized: existence of vector dependence.
riemann.c(107): (col. 11) remark: loop was not vectorized: not inner loop.
riemann.c(102): (col. 7) remark: loop was not vectorized: not inner loop.
riemann.c(298): (col. 11) remark: loop was not vectorized: existence of vector dependence.
riemann.c(296): (col. 9) remark: loop was not vectorized: not inner loop.
riemann.c(291): (col. 7) remark: loop was not vectorized: not inner loop.