Part of the vectorizer patch that was accidently left out...:

        * config/i386/i386.h (UNITS_PER_SIMD_WORD): Define.
        * config/rs6000/rs6000.h (UNITS_PER_SIMD_WORD): Define.

From-SVN: r86180

gcc/config/i386/i386.h

@@ -1080,6 +1080,9 @@ do {									\
      : VALID_MMX_REG_MODE (MODE) && TARGET_MMX ? 1			\
      : VALID_MMX_REG_MODE_3DNOW (MODE) && TARGET_3DNOW ? 1 : 0)
 
+#define UNITS_PER_SIMD_WORD \
+    (TARGET_SSE ? 16 : TARGET_MMX || TARGET_3DNOW ? 8 : 0)
+
 #define VALID_FP_MODE_P(MODE)						\
     ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode		\
      || (MODE) == SCmode || (MODE) == DCmode || (MODE) == XCmode)	\

gcc/config/rs6000/rs6000.h

@@ -1031,6 +1031,9 @@ extern const char *rs6000_warn_altivec_long_switch;
         ((TARGET_SPE && SPE_VECTOR_MODE (MODE))		\
 	 || (TARGET_ALTIVEC && ALTIVEC_VECTOR_MODE (MODE)))
 
+#define UNITS_PER_SIMD_WORD     \
+        (TARGET_ALTIVEC ? 16 : (TARGET_SPE ? 8 : 0) )
+
 /* Value is TRUE if hard register REGNO can hold a value of
    machine-mode MODE.  */
 #define HARD_REGNO_MODE_OK(REGNO, MODE) \