https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100960
--- Comment #6 from Stefan Schulze Frielinghaus
---
Created attachment 53433
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53433=edit
a-t2.c.325r.vartrack
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100960
--- Comment #5 from Stefan Schulze Frielinghaus
---
However, I found another example (see attachment a-t2.c.325r.vartrack) which
does not profit from the patch:
__attribute__((noinline, noclone)) void
fn1 (int x)
{
__asm volatile ("" : "+r"
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100960
--- Comment #4 from Stefan Schulze Frielinghaus
---
I really like the idea of enhancing cselib since there is a chance that other
passes might profit from it, too. The following patch fixes the initial
reported problem:
diff --git
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100960
--- Comment #3 from Jakub Jelinek ---
Slightly related was
https://gcc.gnu.org/legacy-ml/gcc-patches/2010-03/msg01379.html
So, perhaps for the case where we do not track the source register in the wider
mode we could for var-tracking purpose
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100960
Jakub Jelinek changed:
What|Removed |Added
CC||aoliva at gcc dot gnu.org,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100960
--- Comment #1 from Richard Biener ---
sounds like an implementation oversight to me.
