Packed-simd SSE for only vectorized loops

[Fahimeh Yazdanpanah]

Hello,
 
I am working on autovectorization. Using gcc-4.3.3, 64-bit Ubuntu on an intel core2, and vectorization flags, I found that gcc produces packed-simd SSE opcodes for all instructions in vectorized loops and for some instructions in non-vectorized loops.  
 
Would you please let me know if there a flag or switch to disable gcc producing packed-simd instructions for non-vectorized loops? Or is there any way to distinguish between the packed-simd SSE instructions within vectorized loop and within non-vectorized loops?
 
Thanks a lot,
Fahimeh