On 10/6/07, Gary Funck <[EMAIL PROTECTED]> wrote: > I'm also not certain why DECL_PRESERVE_P() was introduced > when TREE_USED() seems to imply the same thing (that the > variable/function is used and shouldn't be eliminated. Because it doesn't mean that.
"/* Nonzero in a _DECL if the name is used in its scope. ... #define TREE_USED(NODE) ((NODE)->base.used_flag) " This is completely unrelated to whether a variable must be preserved. > > I was surprised that the call graph code to check for > variable usage isn't better isolated and modularized. > It seems out of place in c-decl.c for example. It was written at a time when this was the way you had to do things. These days, it probably could be a lot cleaner.
