* [Bug c++/64049] Wrong code at -O3
2014-11-24 13:23 [Bug c++/64049] New: Wrong code at -O3 bernd.edlinger at hotmail dot de
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--- Comment #1 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 34090
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34090&action=edit
ValueHelper1.cpp
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--- Comment #2 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 34091
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34091&action=edit
ValueHelper2.cpp
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--- Comment #3 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 34092
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34092&action=edit
ValueHelper.h
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From: pinskia at gcc dot gnu.org @ 2014-11-24 13:41 UTC (permalink / raw)
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
v.value.LocalizedText = (LocalizedTextStruct*) "Localized Text";
if you access v.value.LocalizedText as a LocalizedTextStruct the above causes
undefined code.
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From: bernd.edlinger at hotmail dot de @ 2014-11-24 14:22 UTC (permalink / raw)
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--- Comment #5 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Andrew Pinski from comment #4)
> v.value.LocalizedText = (LocalizedTextStruct*) "Localized Text";
>
>
> if you access v.value.LocalizedText as a LocalizedTextStruct the above
> causes undefined code.
I stripped that down from a much larger example.
The point is, that ValueStruct1.cpp is mis-compled,
and it cannot know what I did in ValueStruct2.cpp.
However it is easy to re-write the test case so that it does
not require any type casts.
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From: bernd.edlinger at hotmail dot de @ 2014-11-24 14:25 UTC (permalink / raw)
To: gcc-bugs
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Bernd Edlinger <bernd.edlinger at hotmail dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #34090|0 |1
is obsolete| |
--- Comment #6 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 34093
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34093&action=edit
ValueHelper1.cpp
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From: bernd.edlinger at hotmail dot de @ 2014-11-24 14:25 UTC (permalink / raw)
To: gcc-bugs
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Bernd Edlinger <bernd.edlinger at hotmail dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #34091|0 |1
is obsolete| |
--- Comment #7 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 34094
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34094&action=edit
ValueHelper2.cpp
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From: bernd.edlinger at hotmail dot de @ 2014-11-24 14:26 UTC (permalink / raw)
To: gcc-bugs
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Bernd Edlinger <bernd.edlinger at hotmail dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #34092|0 |1
is obsolete| |
--- Comment #8 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 34095
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34095&action=edit
ValueHelper.h
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2014-11-24 16:24 ` [Bug ipa/64049] " rguenth at gcc dot gnu.org
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From: bernd.edlinger at hotmail dot de @ 2014-11-24 14:31 UTC (permalink / raw)
To: gcc-bugs
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Bernd Edlinger <bernd.edlinger at hotmail dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #34094|0 |1
is obsolete| |
--- Comment #9 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 34096
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34096&action=edit
ValueHelper2.cpp
see, no type-casts at all.
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2014-11-24 17:02 ` [Bug ipa/64049] [5 Regression] r215898 caused wrong " rguenth at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2014-11-24 16:24 UTC (permalink / raw)
To: gcc-bugs
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-11-24
CC| |hubicka at gcc dot gnu.org,
| |jamborm at gcc dot gnu.org
Component|c++ |ipa
Target Milestone|--- |5.0
Ever confirmed|0 |1
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
-fno-devirtualize fixes it.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
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From: edlinger at gcc dot gnu.org @ 2014-12-06 0:40 UTC (permalink / raw)
To: gcc-bugs
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Bernd Edlinger <edlinger at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |edlinger at gcc dot gnu.org
--- Comment #12 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
not sure if I even know what I'm doing, but this seems to fix
the test case:
Index: ipa-polymorphic-call.c
===================================================================
--- ipa-polymorphic-call.c (revision 218433)
+++ ipa-polymorphic-call.c (working copy)
@@ -1047,7 +1047,8 @@
if (TREE_CODE (base_pointer) == SSA_NAME
&& SSA_NAME_IS_DEFAULT_DEF (base_pointer)
- && TREE_CODE (SSA_NAME_VAR (base_pointer)) != PARM_DECL)
+ && TREE_CODE (SSA_NAME_VAR (base_pointer)) != PARM_DECL
+ && TREE_CODE (SSA_NAME_VAR (base_pointer)) != RESULT_DECL)
{
invalid = true;
if (instance)
This line is hit exactly once, but with a RESULT_DECL instead
of a PARM_DECL. setting invalid=true makes the whole thing look so invalid
that it gets replaced by __builtin_unreachable() later on.
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From: edlinger at gcc dot gnu.org @ 2014-12-08 18:30 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #13 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Author: edlinger
Date: Mon Dec 8 18:30:15 2014
New Revision: 218487
URL: https://gcc.gnu.org/viewcvs?rev=218487&root=gcc&view=rev
Log:
2014-12-08 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR ipa/64049
* ipa-polymorphic-call.c
(pa_polymorphic_call_context::ipa_polymorphic_call): Allow RESULT_DECL.
testsuite/ChangeLog:
2014-12-08 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR ipa/64049
* g++.dg/ipa/pr64049.h: New.
* g++.dg/ipa/pr64049-1.C: New.
* g++.dg/ipa/pr64049-2.C: New.
Added:
trunk/gcc/testsuite/g++.dg/ipa/pr64049-1.C
trunk/gcc/testsuite/g++.dg/ipa/pr64049-2.C
trunk/gcc/testsuite/g++.dg/ipa/pr64049.h
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-polymorphic-call.c
trunk/gcc/testsuite/ChangeLog
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From: edlinger at gcc dot gnu.org @ 2014-12-08 19:05 UTC (permalink / raw)
To: gcc-bugs
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Bernd Edlinger <edlinger at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #14 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Fixed on trunk, and also confirmed with the Softing OPC UA Tooklit,
where the problem was discoverd.
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