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* [Bug c++/64786] New: Eliminate exceptions thrown/caught inside a function
@ 2015-01-25 14:01 olegendo at gcc dot gnu.org
2015-01-25 14:27 ` [Bug c++/64786] " glisse at gcc dot gnu.org
2024-03-19 22:23 ` pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: olegendo at gcc dot gnu.org @ 2015-01-25 14:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64786
Bug ID: 64786
Summary: Eliminate exceptions thrown/caught inside a function
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: olegendo at gcc dot gnu.org
If I'm not mistaken, in the following example:
int test (int a, int b, int* c)
{
enum err_a_t { ERR_A };
enum err_b_t { ERR_B };
try
{
if ((a + b) == 123)
throw ERR_A;
if ((a - b) == 5)
throw ERR_B;
for (int i = 0; i < b; ++i)
c[i] = 4;
return 0;
}
catch (err_a_t)
{
c[0] = 0;
return -1;
}
catch (err_b_t)
{
c[0] = 1;
return -1;
}
catch (...)
{
__builtin_abort ();
}
}
... the exceptions can be eliminated and converted into something like this
unless -fnon-call-exceptions is used (the mem accesses could throw).
int test (int a, int b, int* c)
{
if ((a + b) == 123)
{
c[0] = 0;
return -1;
}
if ((a - b) == 5)
{
c[0] = 0;
return -1;
}
for (int i = 0; i < b; ++i)
c[i] = 4;
return 0;
}
.. because all possible exceptions are known and are also known to be caught in
the function itself and there's nothing to stack-unwind.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/64786] Eliminate exceptions thrown/caught inside a function
2015-01-25 14:01 [Bug c++/64786] New: Eliminate exceptions thrown/caught inside a function olegendo at gcc dot gnu.org
@ 2015-01-25 14:27 ` glisse at gcc dot gnu.org
2024-03-19 22:23 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: glisse at gcc dot gnu.org @ 2015-01-25 14:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64786
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
See also PR53294 and PR64501.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/64786] Eliminate exceptions thrown/caught inside a function
2015-01-25 14:01 [Bug c++/64786] New: Eliminate exceptions thrown/caught inside a function olegendo at gcc dot gnu.org
2015-01-25 14:27 ` [Bug c++/64786] " glisse at gcc dot gnu.org
@ 2024-03-19 22:23 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-03-19 22:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64786
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 38658 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-03-19 22:23 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2015-01-25 14:01 [Bug c++/64786] New: Eliminate exceptions thrown/caught inside a function olegendo at gcc dot gnu.org
2015-01-25 14:27 ` [Bug c++/64786] " glisse at gcc dot gnu.org
2024-03-19 22:23 ` pinskia at gcc dot gnu.org
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