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[Bug middle-end/36303] location list incomplete for spilled registers
- From: "gcaprino at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 22 May 2008 18:15:45 -0000
- Subject: [Bug middle-end/36303] location list incomplete for spilled registers
- References: <bug-36303-16216@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from gcaprino at gmail dot com 2008-05-22 18:15 -------
(In reply to comment #1)
> This code also does violates C aliasing rules.
I'm sorry, but I don't understand what you mean.
Do you think there is a problem with the code portion
such that it's not legal, safe C code?
(btw this is part of a larger function which I reduced
to facilitate debugging of this issue).
It seems to me that nothing can change the value of "p1", since
no addresses are taken to write into the stack.
"p2" could point inside the structure pointed by "p1", but it
should not be possible for "p2" to point at "p1", right?
Besides, "p2" is only used after the register is saved/reloaded
from the stack.
Could you elaborate?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36303