Revision as of 12:56, 29 October 2010 edit Abdull (talk \| contribs) Extended confirmed users, Pending changes reviewers 6,856 edits →a[i] is a multiplication: new section ← Previous edit		Revision as of 16:44, 29 October 2010 edit undo Alksentrs (talk \| contribs) Extended confirmed users 1,314 edits →a[i] is a multiplication: r Next edit →
Line 51: :"''[...] strength reduction could remove the two multiplications inside the loop (6i and a[i]) [...]''" Via [[C syntax]] and [[pointer arithmetic]], '''a[i]''' can also be interpreted as '''(a + i)'''. Can someone tell where the hidden multiplication is taking place? --[[User:Abdull\|Abdull]] ([[User talk:Abdull\|talk]]) 12:56, 29 October 2010 (UTC) :When doing pointer arithmetic, the index needs to be scaled by the pointer target's size: if <code>a</code> has type <code>int</code>, then <code>(a + i)</code> is equal to <code>(int) (((char) a) + (i sizeof(int)))</code>. [[User:Alksentrs\|Alksentrs]] ([[User talk:Alksentrs\|talk]]) 16:44, 29 October 2010 (UTC)

Talk:Loop-invariant code motion: Difference between revisions