* [Bug translator/16974] New: excessive context size after {stmt;}->stmt; optimization
@ 2014-05-21 18:02 fche at redhat dot com
2015-02-25 22:26 ` [Bug translator/16974] " ajakop at redhat dot com
0 siblings, 1 reply; 2+ messages in thread
From: fche at redhat dot com @ 2014-05-21 18:02 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=16974
Bug ID: 16974
Summary: excessive context size after {stmt;}->stmt;
optimization
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: translator
Assignee: systemtap at sourceware dot org
Reporter: fche at redhat dot com
When dead_stmtexpr_remover::visit_block unwraps statements
from unnecessary { } nesting levels, it has an unintended
consequence on context memory allocation. Namely,
c_tmpcounter::visit_* only special cases the visit_block
type for special handling, wherein distinct statements
may have overlapping temporaries. So for constructs such
as
if (foo=="1") foreach (a in b) ...
else if (foo=="2") foreach (c in d) ...
else ...
all the temporary variables for all blocks (now nested
singleton statements) are expanded as siblings in the
function context struct.
Instead, all of these tree-like staptree nodes (if_statement,
for*_statement, perhaps others) should do what
c_tmpcounter::visit_block does, namely wrap individual
subtree branches into a common anonymous union {}.
--
You are receiving this mail because:
You are the assignee for the bug.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug translator/16974] excessive context size after {stmt;}->stmt; optimization
2014-05-21 18:02 [Bug translator/16974] New: excessive context size after {stmt;}->stmt; optimization fche at redhat dot com
@ 2015-02-25 22:26 ` ajakop at redhat dot com
0 siblings, 0 replies; 2+ messages in thread
From: ajakop at redhat dot com @ 2015-02-25 22:26 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=16974
Abe Jakop <ajakop at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |ajakop at redhat dot com
Resolution|--- |FIXED
--- Comment #1 from Abe Jakop <ajakop at redhat dot com> ---
fixed in commit: d74a787413c860f3ee9624e73db6f7e046d67420
--
You are receiving this mail because:
You are the assignee for the bug.
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2015-02-25 22:26 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-05-21 18:02 [Bug translator/16974] New: excessive context size after {stmt;}->stmt; optimization fche at redhat dot com
2015-02-25 22:26 ` [Bug translator/16974] " ajakop at redhat dot com
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).