An issue for the SC: horrible documentation quality of GCC

[Joe Buck]

On Fri, May 09, 2003 at 06:30:56PM -0400, Richard Kenner wrote:
>     This would not work for the copy propagation (as we need to remove the
>     reference to the register in order to get dead code removed).
> 
> Can you define "copy propagation".  I'm not familiar with the term.

Muchnick's definition: a transformation that, given an assignment x <- y
for some variables x, y, replaces later uses of x with uses of y, as long
as intervening instructions have not changed the value of either x or y.