Question

In VS 10, I set “Vectorizer Diagnostic Level” to “n=2” and “Optimization Diagnostic Phase” to “hpo” as directed in “A Guide to Vectorization with Intel C++ Compilers”. However, (this may be a silly question), where is that report? There is neither something to be shown in “output”, nor project directory.

Answer 1

The vectorization diagnostics are usually emitted as part of the normal compiler diagnostic output, e.g.

$ icc -Wall -msse3 foo.c -vec-report=2 -o foo

...

foo.c(1337): (col. 5) remark: loop was not vectorized: existence of vector dependence.
foo.c(1337): (col. 5) remark: loop was not vectorized: not inner loop.
foo.c(1337): (col. 5) remark: loop was not vectorized: not inner loop.
foo.c(1337): (col. 5) remark: loop was not vectorized: existence of vector dependence.
foo.c(1337): (col. 5) remark: loop was not vectorized: existence of vector dependence.
foo.c(1337): (col. 5) remark: loop was not vectorized: nonstandard loop is not a vectorization candidate.
foo.c(1337): (col. 5) remark: loop was not vectorized: not inner loop.
foo.c(1337): (col. 5) remark: LOOP WAS VECTORIZED.
foo.c(1339): (col. 5) remark: loop was not vectorized: existence of vector dependence.
foo.c(1339): (col. 5) remark: loop was not vectorized: existence of vector dependence.
foo.c(1339): (col. 5) remark: loop was not vectorized: not inner loop.
foo.c(1339): (col. 5) remark: loop was not vectorized: statement cannot be vectorized.
foo.c(1339): (col. 5) remark: loop was not vectorized: not inner loop.

...

$