This was actually my first instinct too, here was the output I got from testing with B::Concise. 

stvn% perl -MO=Concise -e '$x++'
5  <@> leave[1 ref] vKP/REFC ->(end)
1     <0> enter ->2
2     <;> nextstate(main 1 -e:1) v ->3
4     <1> preinc[t2] vK/1 ->5
-        <1> ex-rv2sv sKRM/1 ->4
3           <#> gvsv[*x] s ->4
-e syntax OK
stvn% perl -MO=Concise -e '$x += 1'
6  <@> leave[1 ref] vKP/REFC ->(end)
1     <0> enter ->2
2     <;> nextstate(main 1 -e:1) v ->3
5     <2> add[t2] vKS/2 ->6
-        <1> ex-rv2sv sKRM/1 ->4
3           <#> gvsv[*x] s ->4
4        <$> const[IV 1] s ->5
-e syntax OK
stvn% perl -MO=Concise -e '$x = $x + 1'
8  <@> leave[1 ref] vKP/REFC ->(end)
1     <0> enter ->2
2     <;> nextstate(main 1 -e:1) v ->3
7     <2> sassign vKS/2 ->8
5        <2> add[t3] sK/2 ->6
-           <1> ex-rv2sv sK/1 ->4
3              <#> gvsv[*x] s ->4
4           <$> const[IV 1] s ->5
-        <1> ex-rv2sv sKRM*/1 ->7
6           <#> gvsv[*x] s ->7
-e syntax OK

[download]
You can see that the x += 1 and x = x + 1 are similar, but not enough to call equivalent. Besides I am not sure that opcode equivalence would actually work since perl performs optimizations on the opcode tree during compilation which you would not want to include in your comparisons.

-stvn

In reply to Re^2: Equivalency of Code by stvn
in thread Equivalency of Code by rkosai

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.