In some cases you want to do the opposite - to utilize SIMD.

With AVX-512 for example, trivial branching can be replaced with branchless code using the vector mask registers k0-k7, so an if inside a for is better than the for inside the if, which may have to iterate over a sequence of values twice.

To give a basic example, consider a loop like:

    for (int i = 0; i < length ; i++) {
        if (values[i] % 2 == 1)
            values[i] += 1;
        else
            values[i] -= 2;
    }

We can convert this to one which operates on 16 ints per loop iteration, with the loop body containing no branches, where each int is only read and written to memory once (assuming length % 16 == 0).

    __mmask16 consequents;
    __mmask16 alternatives;
    __mm512i results;
    __mm512i ones = _mm512_set1_epi32(1);
    __mm512i twos = _mm512_set1_epi32(2);
    for (int i = 0; i < length ; i += 16) {
        results = _mm512_load_epi32(&values[i]); 
        consequents = _mm512_cmpeq_epi32_mask(_mm512_mod_epi32(results, twos), ones);
        results = _mm512_mask_add_epi32(results, consequents, results, ones);
        alternatives = _knot_mask16(consequents);
        results = _mm512_mask_sub_epi32(results, alternatives, results, twos);
        _mm512_store_epi32(&values[i], results);
    }

Ideally, the compiler will auto-vectorize the first example and produce something equivalent to the second in the compiled object.