title: Why doesn't GCC show vectorization information?
body: <p>I'm using Codeblocks for a C program on Windows 7. The program is using the OMP library. GCC version is 4.9.2. Mingw x86_64-w64-mingw32-gcc-4.9.2.exe.</p>
  
  <p>Flags used are: <code>-fopenmp -O3 -mfpmath=sse -funroll-loops -ftree-loop-distribution -ftree-vectorize -ftree-vectorizer-verbose=2</code>.</p>
  
  <p>The program runs correctly but the problem is that it doesn't show information on what loops were vectorized or not. How can I solve it? </p>
  
  <p>Build log info:</p>
  
  <blockquote>
    <p>-------------- Build: Release in **** (compiler: GNU GCC Compiler)---------------</p>
    
    <p>x86_64-w64-mingw32-gcc-4.9.2.exe -Wall -O2 -march=corei7
    -fexpensive-optimizations -O3 -fopenmp -mfpmath=sse -funroll-loops -ftree-loop-distribution -ftree-vectorize -ftree-vectorizer-verbose=2  -c C:\Users...\f.c -o obj\Release\f.o x86_64-w64-mingw32-g++.exe  -o
    bin\Release\d.exe obj\Release\f.o obj\Release\main.o  -s
    "C:\Program
    Files...\libgomp-1.dll"
    Output file is bin\Release\d.exe with size 21.00 KB Process
    terminated with status 0 (0 minute(s), 0 second(s)) 0 error(s), 0
    warning(s) (0 minute(s), 0 second(s))</p>
  </blockquote>