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* [Bug c++/59916] New: [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os
@ 2014-01-23 11:35 Bernhard.Rosenkranzer at linaro dot org
2014-01-27 11:05 ` [Bug c++/59916] " paolo.carlini at oracle dot com
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: Bernhard.Rosenkranzer at linaro dot org @ 2014-01-23 11:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59916
Bug ID: 59916
Summary: [4.9 Regression] constructors and destructors can
cause "control reaches end of non-void function"
warnings with -Os
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Bernhard.Rosenkranzer at linaro dot org
Created attachment 31929
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31929&action=edit
test case
The following C++ code:
class A
{
};
class B : virtual public A
{
public:
B();
virtual ~B();
};
B::B()
{
}
B::~B()
{
}
causes an incorrect warning with current 4.9 git with -Os:
[bero@localhost gcc-test]$ arm-linux-androideabi-g++ -Werror=return-type -Os -o
test.o test.cpp
test.cpp: In constructor 'B::B()':
test.cpp:14:1: error: control reaches end of non-void function
[-Werror=return-type]
}
^
test.cpp: In constructor 'B::B()':
test.cpp:14:1: error: control reaches end of non-void function
[-Werror=return-type]
}
^
test.cpp: In destructor 'B::~B()':
test.cpp:18:1: error: control reaches end of non-void function
[-Werror=return-type]
}
^
test.cpp: In destructor 'virtual B::~B()':
test.cpp:18:1: error: control reaches end of non-void function
[-Werror=return-type]
}
^
cc1plus: some warnings being treated as errors
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/59916] [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os
2014-01-23 11:35 [Bug c++/59916] New: [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os Bernhard.Rosenkranzer at linaro dot org
@ 2014-01-27 11:05 ` paolo.carlini at oracle dot com
2014-01-28 13:04 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: paolo.carlini at oracle dot com @ 2014-01-27 11:05 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59916
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Richard, is this a front-end issue?
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/59916] [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os
2014-01-23 11:35 [Bug c++/59916] New: [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os Bernhard.Rosenkranzer at linaro dot org
2014-01-27 11:05 ` [Bug c++/59916] " paolo.carlini at oracle dot com
@ 2014-01-28 13:04 ` rguenth at gcc dot gnu.org
2014-01-29 13:34 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-01-28 13:04 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59916
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.9.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Surely frontend related - after gimplification I see
B::B() (struct B * const this, const void * * __vtt_parm)
{
struct B * <retval>;
<retval> = B::B (this, 0, __vtt_parm);
}
which misses a return.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/59916] [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os
2014-01-23 11:35 [Bug c++/59916] New: [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os Bernhard.Rosenkranzer at linaro dot org
2014-01-27 11:05 ` [Bug c++/59916] " paolo.carlini at oracle dot com
2014-01-28 13:04 ` rguenth at gcc dot gnu.org
@ 2014-01-29 13:34 ` rguenth at gcc dot gnu.org
2014-01-29 14:12 ` jason at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-01-29 13:34 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59916
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-01-29
Ever confirmed|0 |1
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed btw. No, gimple wants a return stmt, so somewhere it goes wrong -
either wrong GENERIC or wrong C++ specific gimplification.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/59916] [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os
2014-01-23 11:35 [Bug c++/59916] New: [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os Bernhard.Rosenkranzer at linaro dot org
` (2 preceding siblings ...)
2014-01-29 13:34 ` rguenth at gcc dot gnu.org
@ 2014-01-29 14:12 ` jason at gcc dot gnu.org
2014-01-29 17:13 ` jason at gcc dot gnu.org
2014-01-29 17:13 ` jason at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jason at gcc dot gnu.org @ 2014-01-29 14:12 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59916
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/59916] [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os
2014-01-23 11:35 [Bug c++/59916] New: [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os Bernhard.Rosenkranzer at linaro dot org
` (4 preceding siblings ...)
2014-01-29 17:13 ` jason at gcc dot gnu.org
@ 2014-01-29 17:13 ` jason at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jason at gcc dot gnu.org @ 2014-01-29 17:13 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59916
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/59916] [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os
2014-01-23 11:35 [Bug c++/59916] New: [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os Bernhard.Rosenkranzer at linaro dot org
` (3 preceding siblings ...)
2014-01-29 14:12 ` jason at gcc dot gnu.org
@ 2014-01-29 17:13 ` jason at gcc dot gnu.org
2014-01-29 17:13 ` jason at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jason at gcc dot gnu.org @ 2014-01-29 17:13 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59916
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Jan 29 17:13:01 2014
New Revision: 207271
URL: http://gcc.gnu.org/viewcvs?rev=207271&root=gcc&view=rev
Log:
PR c++/59916
* optimize.c (maybe_thunk_body): Build a RETURN_EXPR for
cdtor_returns_this case.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wreturn-type-10.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/optimize.c
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2014-01-29 17:13 UTC | newest]
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2014-01-23 11:35 [Bug c++/59916] New: [4.9 Regression] constructors and destructors can cause "control reaches end of non-void function" warnings with -Os Bernhard.Rosenkranzer at linaro dot org
2014-01-27 11:05 ` [Bug c++/59916] " paolo.carlini at oracle dot com
2014-01-28 13:04 ` rguenth at gcc dot gnu.org
2014-01-29 13:34 ` rguenth at gcc dot gnu.org
2014-01-29 14:12 ` jason at gcc dot gnu.org
2014-01-29 17:13 ` jason at gcc dot gnu.org
2014-01-29 17:13 ` jason at gcc dot gnu.org
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