[Bug translator/11353] elide side-effect-free probes

["chwang at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From chwang at redhat dot com  2010-03-08 20:17 -------
Created an attachment (id=4654)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4654&action=view)
Patch for 11353

Skips empty probes by checking if p->body->statements.size() == 0. I had to do
a cast to (block*), it seems like it should cast all right since
parse_stmt_block() returns a block*. (p->body = parse_stmt_block(), 2 lines
above changes)

Not sure if this is what you want, or if you just want to get rid of the
warning message in elaborate.cxx?

Rudimentary tests (e.g. stap -e 'probe begin {printf("HAI") exit()} probe end
{}') seem to work.

Running make installcheck, since I'm not sure that this won't break anything
else :/

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=11353

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