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* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
@ 2011-02-25 14:51 ` krebbel at gcc dot gnu.org
2011-02-25 15:52 ` rguenth at gcc dot gnu.org
` (33 subsequent siblings)
34 siblings, 0 replies; 38+ messages in thread
From: krebbel at gcc dot gnu.org @ 2011-02-25 14:51 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |krebbel at gcc dot gnu.org
--- Comment #4 from Andreas Krebbel <krebbel at gcc dot gnu.org> 2011-02-25 14:08:20 UTC ---
I also see uninit-13.c failing on s390x.
The warning here is also emitted for line 7 while being expected in
line 8.
4 typedef _Complex float C;
5 C foo()
6 {
7 C f;
8 __imag__ f = 0; /* { dg-warning "is used" "unconditional" } */
9 return f;
10 }
The question is why do we expect the warning in line 8 at all?! To me
it makes sense to either emit the warning on the uninitialized use -
that would be the "return f;" in line 9 or emit it for the declaration
of the uninitialized variable - that would be line 7 then.
To my understanding line 8 is the only one not directly related to the
warning.
warn_uninit in tree-ssa.c seems to implement exactly this. It uses
either the location of the using gimple expression if available or it
falls back to the var decl. On s390x I see the var decl being used as
location while for x86_64 there is a stmt having its own location which
is used instead.
x86_64: uninit-13.c.083t.dce2:
foo ()
{
float f$real;
C f;
<bb 2>:
[gcc/testsuite/gcc.dg/uninit-13.c : 8:14] f_3 = COMPLEX_EXPR <f$real_5(D),
0.0>;
return f_3;
}
s390x: uninit-13.i.083t.dce2
foo ()
{
float f$real;
<bb 2>:
REALPART_EXPR <<retval>> = f$real_6(D);
[gcc/testsuite/gcc.dg/uninit-13.c : 9:3] IMAGPART_EXPR <<retval>> = 0.0;
[gcc/testsuite/gcc.dg/uninit-13.c : 9:3] return <retval>;
}
Before dce2 the line with the COMPLEX_EXPR exists also on s390x:
s390x: uninit-13.i.082t.reassoc1:
foo ()
{
float f$real;
C f;
float D.2702;
<bb 2>:
[gcc/testsuite/gcc.dg/uninit-13.c : 8:14] f$real_2 = f$real_6(D);
[gcc/testsuite/gcc.dg/uninit-13.c : 8:14] f_3 = COMPLEX_EXPR <f$real_6(D),
0.0>;
REALPART_EXPR <<retval>> = f$real_6(D);
[gcc/testsuite/gcc.dg/uninit-13.c : 9:3] IMAGPART_EXPR <<retval>> = 0.0;
[gcc/testsuite/gcc.dg/uninit-13.c : 9:3] return <retval>;
}
I think first we should fix the testcase - moving the warning one line
up and then find a way to fix the x86_64 problem. To me it currently
looks like this is a testcase bug.
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
2011-02-25 14:51 ` [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c krebbel at gcc dot gnu.org
@ 2011-02-25 15:52 ` rguenth at gcc dot gnu.org
2011-03-01 18:08 ` krebbel at gcc dot gnu.org
` (32 subsequent siblings)
34 siblings, 0 replies; 38+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-02-25 15:52 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-02-25 14:51:22 UTC ---
At what point does the direct access to IMAGPART<retval> appear? That looks
like the bug. Why isn't a temporary used for this? Does s390 return the
complex number in memory?
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
2011-02-25 14:51 ` [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c krebbel at gcc dot gnu.org
2011-02-25 15:52 ` rguenth at gcc dot gnu.org
@ 2011-03-01 18:08 ` krebbel at gcc dot gnu.org
2011-03-01 18:09 ` jingyu at google dot com
` (31 subsequent siblings)
34 siblings, 0 replies; 38+ messages in thread
From: krebbel at gcc dot gnu.org @ 2011-03-01 18:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
--- Comment #6 from Andreas Krebbel <krebbel at gcc dot gnu.org> 2011-03-01 18:08:11 UTC ---
The first difference between x86_64 and s390x appears in 004t.gimple since
s390x returns complex numbers in memory:
x86_64:
foo ()
{
float D.2684;
C D.2685;
C f;
D.2684 = REALPART_EXPR <f>;
f = COMPLEX_EXPR <D.2684, 0.0>;
D.2685 = f;
return D.2685;
}
s390x:
foo ()
{
float D.2702;
C f;
D.2702 = REALPART_EXPR <f>;
f = COMPLEX_EXPR <D.2702, 0.0>;
<retval> = f;
return <retval>;
}
The assignment to the imaginary part is introduced by cplxlower:
foo ()
{
float f$real;
C f;
float D.2702;
<bb 2>:
f$real_2 = f$real_6(D);
f_3 = COMPLEX_EXPR <f$real_2, 0.0>;
REALPART_EXPR <<retval>> = f$real_2;
IMAGPART_EXPR <<retval>> = 0.0;
return <retval>;
}
expand_complex_operations_1 is invoked for gimple stmt:
# .MEM_5 = VDEF <.MEM_4(D)>
<retval> = f_3;
the code falls through to the default label and invokes emit_complex_move in
tree-complex.c:1459
Since <retval> is no SSA_NAME emit_complex_move falls through to the code in
tree-complex.c:826 which splits the complex move to:
REALPART_EXPR <<retval>> = f$real_2;
IMAGPART_EXPR <<retval>> = 0.0;
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2011-03-01 18:08 ` krebbel at gcc dot gnu.org
@ 2011-03-01 18:09 ` jingyu at google dot com
2012-01-24 21:59 ` pinskia at gcc dot gnu.org
` (30 subsequent siblings)
34 siblings, 0 replies; 38+ messages in thread
From: jingyu at google dot com @ 2011-03-01 18:09 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
--- Comment #7 from Jing Yu <jingyu at google dot com> 2011-03-01 18:08:57 UTC ---
I am on leave from 02/01/2011 to 05/30/2011. I may not reply your
email during this period.
If you have Android toolchain questions/issues/requests, please
contact Doug (dougkwan@google.com) or my manager Bhaskar
(bjanakiraman@google.com).
Thanks,
Jing
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2011-03-01 18:09 ` jingyu at google dot com
@ 2012-01-24 21:59 ` pinskia at gcc dot gnu.org
2012-01-24 22:00 ` pinskia at gcc dot gnu.org
` (29 subsequent siblings)
34 siblings, 0 replies; 38+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-01-24 21:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |Greta.Yorsh at arm dot com
--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-24 19:48:24 UTC ---
*** Bug 51983 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2012-01-24 21:59 ` pinskia at gcc dot gnu.org
@ 2012-01-24 22:00 ` pinskia at gcc dot gnu.org
2013-06-19 20:24 ` meadori at gcc dot gnu.org
` (28 subsequent siblings)
34 siblings, 0 replies; 38+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-01-24 22:00 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-24 19:48:16 UTC ---
*** Bug 41895 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2012-01-24 22:00 ` pinskia at gcc dot gnu.org
@ 2013-06-19 20:24 ` meadori at gcc dot gnu.org
2013-06-19 21:00 ` manu at gcc dot gnu.org
` (27 subsequent siblings)
34 siblings, 0 replies; 38+ messages in thread
From: meadori at gcc dot gnu.org @ 2013-06-19 20:24 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
meadori at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |meadori at gcc dot gnu.org
--- Comment #10 from meadori at gcc dot gnu.org ---
I just bumped into this again while looking through some XFAILS.
I think Andreas' analysis is correct, but I am not sure how to
fix the problem.
Note that for ARM that the test passes for '-mfloat-abi=hard'.
For `arm-none-eabi-gcc -O -Wuninitialized` we get:
original
========
{
C f;
C f;
IMAGPART_EXPR <f> = 0.0;
return f;
}
gimple
======
foo ()
{
float D.4063;
C f;
; NOTE: The partial store was promoted to a total store which
; introduces the 'REALPART_EXPR <f>' bit.
D.4063 = REALPART_EXPR <f>;
f = COMPLEX_EXPR <D.4063, 0.0>;
<retval> = f;
return <retval>;
}
cplxlower1
==========
foo ()
{
float f$real;
C f;
<bb 2>:
f$real_2 = f$real_6(D);
f_3 = COMPLEX_EXPR <f$real_2, 0.0>;
REALPART_EXPR <<retval>> = f$real_2;
IMAGPART_EXPR <<retval>> = 0.0;
return <retval>;
}
dce2
====
foo ()
{
float f$real;
C f;
<bb 2>:
; NOTE: Warning about unused variable on next statement, which is
; associated with the 'C f;' declaration because the statements
; below as introduced by cplxlower1 don't have any location info.
REALPART_EXPR <<retval>> = f$real_6(D);
IMAGPART_EXPR <<retval>> = 0.0;
return <retval>;
}
For `arm-none-eabi-gcc -O -Wuninitialized -mfloat-abi=hard` things are very
similar until we get to complex lowering:
gimple
======
foo ()
{
float D.4062;
C D.4063;
C f;
; NOTE: The partial store was promoted to a total store which
; introduces the 'REALPART_EXPR <f>' bit.
D.4062 = REALPART_EXPR <f>;
f = COMPLEX_EXPR <D.4062, 0.0>;
D.4063 = f;
return D.4063;
}
cplxlower1
==========
foo ()
{
float f$real;
C f;
<bb 2>:
f$real_2 = f$real_5(D);
f_3 = COMPLEX_EXPR <f$real_2, 0.0>;
return f_3;
}
dce2
====
foo ()
{
float f$real;
C f;
<bb 2>:
; NOTE: Warning about unused variable on next statement,
; which is associated with the '__imag__ f = 0;' line.
f_3 = COMPLEX_EXPR <f$real_5(D), 0.0>;
return f_3;
}
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
` (6 preceding siblings ...)
2013-06-19 20:24 ` meadori at gcc dot gnu.org
@ 2013-06-19 21:00 ` manu at gcc dot gnu.org
2014-05-04 9:53 ` thomas.preudhomme at arm dot com
` (26 subsequent siblings)
34 siblings, 0 replies; 38+ messages in thread
From: manu at gcc dot gnu.org @ 2013-06-19 21:00 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #11 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to meadori from comment #10)
> I just bumped into this again while looking through some XFAILS.
> I think Andreas' analysis is correct, but I am not sure how to
> fix the problem.
This explanation would be clearer if you used the option -lineno (or -all) when
dumping.
Ideally, the warning should be given in "return f". Perhaps there is a way to
adjust the locations?
I guess that for:
4 typedef _Complex float C;
5 C foo()
6 {
7 C f;
8 __imag__ f = 0; /* { dg-warning "is used" "unconditional" } */
__real__ f = 0;
9 return f;
10 }
there is no warning, no?
>From gcc-bugs-return-424666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 19 21:01:38 2013
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Subject: [Bug c/57653] filename information discarded when using -imacros
Date: Wed, 19 Jun 2013 21:01:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
Component|middle-end |c
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Can you provide a complete testcase? Thanks.
>From gcc-bugs-return-424668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 19 21:06:30 2013
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/44613] Declaring an array with non-constant length inside a switch corrupts stack pointer.
Date: Wed, 19 Jun 2013 21:06:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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CC| |b.r.longbons at gmail dot com
--- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 57646 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-424667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 19 21:06:29 2013
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Subject: [Bug c++/57646]=?UTF-8?Q? bogus warning about uninitialized ‘saved_stack?=.=?UTF-8?Q?1’ with gotos and VLAs?Date: Wed, 19 Jun 2013 21:06:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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CC| |manu at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
I think it is exactly the same.
*** This bug has been marked as a duplicate of bug 44613 ***
>From gcc-bugs-return-424669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 19 21:26:59 2013
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/57655] [4.8/4.9 Regression] ICE: in create_pre_exit, at mode-switching.c:418 with -mno-fp-ret-in-387 -mvzeroupper -mxop and __builtin_ilogbl()
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2013-06-19
Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com
Ever confirmed|0 |1
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
--cut here--
Index: i386.c
===================================================================
--- i386.c (revision 200211)
+++ i386.c (working copy)
@@ -6498,7 +6498,7 @@ construct_container (enum machine_mode mode, enum
/* Likewise, error if the ABI requires us to return values in the
x87 registers and the user specified -mno-80387. */
- if (!TARGET_80387 && in_return)
+ if (!TARGET_FLOAT_RETURNS_IN_80387 && in_return)
for (i = 0; i < n; i++)
if (regclass[i] == X86_64_X87_CLASS
|| regclass[i] == X86_64_X87UP_CLASS
--cut here--
>From gcc-bugs-return-424670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 19 21:57:24 2013
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From: "allan at archlinux dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/57653] filename information discarded when using -imacros
Date: Wed, 19 Jun 2013 21:57:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57653
--- Comment #2 from Allan McRae <allan at archlinux dot org> ---
# echo "int main() { return }" > foo.c
# touch foo.h
# gcc -imacros foo.h foo.c
<command-line>: In function ‘main’:
<command-line>:1:21: error: expected expression before ‘}’ token
>From gcc-bugs-return-424671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jun 19 22:10:07 2013
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From: "ishiura-compiler at ml dot kwansei.ac.jp" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/57656] New: Wrong constant folding
Date: Wed, 19 Jun 2013 22:10:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idW656
Bug ID: 57656
Summary: Wrong constant folding
Product: gcc
Version: 4.8.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ishiura-compiler at ml dot kwansei.ac.jp
GCC 4.8.2 for i686 miscompiles the following code.
$ cat error.c
int main (void)
{
int a = -1;
int b = 2147483647;
int c = 2;
int t = 1 - ((a - b) / c); // t = 1 - ( -2147483648 / 2 )
if (t != 1073741825) { __builtin_abort(); }
return 0;
}
$ i686-pc-linux-gnu-gcc-4.8.2 error.c -O2
$ ./a.out
Aborted (core dumped)
There was no problem with an x86_64 target.
$ i686-pc-linux-gnu-gcc-4.8.2 -v
Using built-in specs.
COLLECT_GCC=i686-pc-linux-gnu-gcc-4.8.2
COLLECT_LTO_WRAPPER=/usr/local/i686-tools/gcc-4.8.2/libexec/gcc/i686-pc-linux-gnu/4.8.2/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: /home/hassy/gcc/configure
--prefix=/usr/local/i686-tools/gcc-4.8.2/
--with-gmp=/usr/local/gmp-5.1.1/ --with-mpfr=/usr/local/mpfr-3.1.2/
--with-mpc=/usr/local/mpc-1.0.1/ --disable-multilib --disable-nls
--enable-languages=c
Thread model: posix
gcc version 4.8.2 20130607 (prerelease) (GCC)
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Thomas Preud'homme <thomas.preudhomme at arm dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |thomas.preudhomme at arm dot com
--- Comment #12 from Thomas Preud'homme <thomas.preudhomme at arm dot com> ---
A patch to fix this is currently under discussion on gcc-patches at:
http://gcc.gnu.org/ml/gcc-patches/2014-05/msg00164.html
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* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
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From: StaffLeavers at arm dot com @ 2014-05-04 10:11 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
--- Comment #32 from StaffLeavers at arm dot com ---
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* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
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To: gcc-bugs
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--- Comment #34 from StaffLeavers at arm dot com ---
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* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
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To: gcc-bugs
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* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
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From: jye2 at gcc dot gnu.org @ 2014-05-08 1:19 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
--- Comment #35 from jye2 at gcc dot gnu.org ---
Author: jye2
Date: Thu May 8 01:19:11 2014
New Revision: 210198
URL: http://gcc.gnu.org/viewcvs?rev=210198&root=gcc&view=rev
Log:
2014-05-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
PR middle-end/39246
* tree-complex.c (expand_complex_move): Keep line info when expanding
complex move.
* tree-ssa-uninit.c (warn_uninit): New argument. Ignore assignment
of complex expression. Use new argument to display correct location
for values coming from phi statement.
(warn_uninitialized_vars): Adapt to new signature of warn_uninit.
(warn_uninitialized_phi): Pass location of phi argument to
warn_uninit.
* tree-ssa.c (ssa_undefined_value_p): For SSA_NAME initialized by a
COMPLEX_EXPR, recurse on each part of the COMPLEX_EXPR.
testsuite:
* gcc.dg/uninit-13.c: Move warning on the actual source line where
the uninitialized complex is used.
* gcc.dg/uninit-17.c: New test to check partial initialization of
complex with branches.
* gcc.dg/uninit-17-O0.c: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
` (31 preceding siblings ...)
2014-05-08 1:19 ` jye2 at gcc dot gnu.org
@ 2014-05-08 1:21 ` jye2 at gcc dot gnu.org
2014-05-08 1:23 ` jye2 at gcc dot gnu.org
2015-01-27 1:42 ` thopre01 at gcc dot gnu.org
34 siblings, 0 replies; 38+ messages in thread
From: jye2 at gcc dot gnu.org @ 2014-05-08 1:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
--- Comment #36 from jye2 at gcc dot gnu.org ---
Author: jye2
Date: Thu May 8 01:20:17 2014
New Revision: 210199
URL: http://gcc.gnu.org/viewcvs?rev=210199&root=gcc&view=rev
Log:
2014-05-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
PR middle-end/39246
* tree-complex.c (expand_complex_move): Keep line info when expanding
complex move.
* tree-ssa-uninit.c (warn_uninit): New argument. Ignore assignment
of complex expression. Use new argument to display correct location
for values coming from phi statement.
(warn_uninitialized_vars): Adapt to new signature of warn_uninit.
(warn_uninitialized_phi): Pass location of phi argument to
warn_uninit.
* tree-ssa.c (ssa_undefined_value_p): For SSA_NAME initialized by a
COMPLEX_EXPR, recurse on each part of the COMPLEX_EXPR.
testsuite:
* gcc.dg/uninit-13.c: Move warning on the actual source line where
the uninitialized complex is used.
* gcc.dg/uninit-17.c: New test to check partial initialization of
complex with branches.
* gcc.dg/uninit-17-O0.c: Likewise.
Modified:
trunk/gcc/testsuite/gcc.dg/uninit-13.c
trunk/gcc/tree-complex.c
trunk/gcc/tree-ssa-uninit.c
trunk/gcc/tree-ssa.c
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
` (32 preceding siblings ...)
2014-05-08 1:21 ` jye2 at gcc dot gnu.org
@ 2014-05-08 1:23 ` jye2 at gcc dot gnu.org
2015-01-27 1:42 ` thopre01 at gcc dot gnu.org
34 siblings, 0 replies; 38+ messages in thread
From: jye2 at gcc dot gnu.org @ 2014-05-08 1:23 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
--- Comment #37 from jye2 at gcc dot gnu.org ---
Author: jye2
Date: Thu May 8 01:23:01 2014
New Revision: 210200
URL: http://gcc.gnu.org/viewcvs?rev=210200&root=gcc&view=rev
Log:
2014-05-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
PR middle-end/39246
* tree-complex.c (expand_complex_move): Keep line info when expanding
complex move.
* tree-ssa-uninit.c (warn_uninit): New argument. Ignore assignment
of complex expression. Use new argument to display correct location
for values coming from phi statement.
(warn_uninitialized_vars): Adapt to new signature of warn_uninit.
(warn_uninitialized_phi): Pass location of phi argument to
warn_uninit.
* tree-ssa.c (ssa_undefined_value_p): For SSA_NAME initialized by a
COMPLEX_EXPR, recurse on each part of the COMPLEX_EXPR.
testsuite:
* gcc.dg/uninit-13.c: Move warning on the actual source line where
the uninitialized complex is used.
* gcc.dg/uninit-17.c: New test to check partial initialization of
complex with branches.
* gcc.dg/uninit-17-O0.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/uninit-17-O0.c
trunk/gcc/testsuite/gcc.dg/uninit-17.c
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
[not found] <bug-39246-4@http.gcc.gnu.org/bugzilla/>
` (33 preceding siblings ...)
2014-05-08 1:23 ` jye2 at gcc dot gnu.org
@ 2015-01-27 1:42 ` thopre01 at gcc dot gnu.org
34 siblings, 0 replies; 38+ messages in thread
From: thopre01 at gcc dot gnu.org @ 2015-01-27 1:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
thopre01 at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |thopre01 at gcc dot gnu.org
Known to work| |5.0
Resolution|--- |FIXED
--- Comment #38 from thopre01 at gcc dot gnu.org ---
Solved in GCC 5.0 as of r210200, no backport intended.
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
2009-02-19 16:44 [Bug c/39246] New: " danglin at gcc dot gnu dot org
2009-04-15 20:41 ` [Bug middle-end/39246] " jingyu at google dot com
2009-05-13 10:08 ` ramana at gcc dot gnu dot org
@ 2009-10-17 22:09 ` mikpe at it dot uu dot se
2 siblings, 0 replies; 38+ messages in thread
From: mikpe at it dot uu dot se @ 2009-10-17 22:09 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from mikpe at it dot uu dot se 2009-10-17 22:08 -------
I just had a look at some gcc-4.4.2 testsuite failure on arm-linux-gnueabi, and
came across the uninit-13.c one and this PR.
The error is not that uninit-13.c triggers an "is used uninitialized" warning,
it's supposed to do that, but that on ARM the line number for the warning is
off-by-one.
On armv5tel-linux-gnueabi:
uninit-13.c: In function 'foo':
uninit-13.c:7: warning: '__real__ f' is used uninitialized in this function
On i686-pc-linux-gnu:
uninit-13.c: In function 'foo':
uninit-13.c:8: warning: '__real__ f' is used uninitialized in this function
Apparently x86-64 is also off-by-one, while my powerpc64 box agrees with i686.
If I replace the _Complex float with a struct of two floats like this:
typedef struct { float x; float y; } C;
C foo()
{
float x; float y;
x = 0;
return (C){x, y};
}
then my i686 and ARM compilers emit identical warnings.
Something strange is happening with _Complex on ARM (and x86-64).
--
mikpe at it dot uu dot se changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mikpe at it dot uu dot se
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
2009-02-19 16:44 [Bug c/39246] New: " danglin at gcc dot gnu dot org
2009-04-15 20:41 ` [Bug middle-end/39246] " jingyu at google dot com
@ 2009-05-13 10:08 ` ramana at gcc dot gnu dot org
2009-10-17 22:09 ` mikpe at it dot uu dot se
2 siblings, 0 replies; 38+ messages in thread
From: ramana at gcc dot gnu dot org @ 2009-05-13 10:08 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from ramana at gcc dot gnu dot org 2009-05-13 10:08 -------
I can see this with trunk at r147467
--
ramana at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2009-05-13 10:08:01
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
^ permalink raw reply [flat|nested] 38+ messages in thread
* [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c
2009-02-19 16:44 [Bug c/39246] New: " danglin at gcc dot gnu dot org
@ 2009-04-15 20:41 ` jingyu at google dot com
2009-05-13 10:08 ` ramana at gcc dot gnu dot org
2009-10-17 22:09 ` mikpe at it dot uu dot se
2 siblings, 0 replies; 38+ messages in thread
From: jingyu at google dot com @ 2009-04-15 20:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from jingyu at google dot com 2009-04-15 20:41 -------
I have observed the same error on
host: x86_64-linux-gnu and i686-linux-gnu
target: arm-unknown-eabi
Executing on host: /usr/local/google/tmp/gcc4.4_dejagnu/obj/gcc-4.4/gcc/xgcc
-B/usr/local/google/tmp/gcc4.4_dejagnu/obj/gcc-4.4/gcc/
/usr/local/google/nightly/sources/arm_toolchain/gcc-4.4/gcc/testsuite/gcc.dg/uninit-13-O0.c
-Wuninitialized -DSTACK_SIZE=16384 -S -o uninit-13-O0.s (timeout = 800)
XFAIL: gcc.dg/uninit-13-O0.c unconditional (test for warnings, line 8)
PASS: gcc.dg/uninit-13-O0.c (test for excess errors)
Executing on host: /usr/local/google/tmp/gcc4.4_dejagnu/obj/gcc-4.4/gcc/xgcc
-B/usr/local/google/tmp/gcc4.4_dejagnu/obj/gcc-4.4/gcc/
/usr/local/google/nightly/sources/arm_toolchain/gcc-4.4/gcc/testsuite/gcc.dg/uninit-13.c
-O -Wuninitialized -DSTACK_SIZE=16384 -S -o uninit-13.s (timeout = 800)
/usr/local/google/nightly/sources/arm_toolchain/gcc-4.4/gcc/testsuite/gcc.dg/uninit-13.c:
In function 'foo':
/usr/local/google/nightly/sources/arm_toolchain/gcc-4.4/gcc/testsuite/gcc.dg/uninit-13.c:7:
warning: '__real__ f' is used uninitialized in this function
output is:
/usr/local/google/nightly/sources/arm_toolchain/gcc-4.4/gcc/testsuite/gcc.dg/uninit-13.c:
In function 'foo':
/usr/local/google/nightly/sources/arm_toolchain/gcc-4.4/gcc/testsuite/gcc.dg/uninit-13.c:7:
warning: '__real__ f' is used uninitialized in this function
FAIL: gcc.dg/uninit-13.c unconditional (test for warnings, line 8)
FAIL: gcc.dg/uninit-13.c (test for excess errors)
Excess errors:
/usr/local/google/nightly/sources/arm_toolchain/gcc-4.4/gcc/testsuite/gcc.dg/uninit-13.c:7:
warning: '__real__ f' is used uninitialized in this function
$arm-eabi-gcc -v
Using built-in specs.
Target: arm-eabi
Configured with:
/usr/local/google/nightly/sources/arm_toolchain/gcc-4.4/configure
--prefix=/usr/local/google/tmp/gcc4.4_dejagnu/install --target=arm-eabi
--build=x86_64-linux-gnu --host=x86_64-linux-gnu
--with-gmp=/usr/local/google/tmp/gcc4.4_dejagnu/install
--with-mpfr=/usr/local/google/tmp/gcc4.4_dejagnu/install --enable-multilib
--with-newlib --with-gnu-as --with-gnu-ld --enable-languages=c,c++
Thread model: single
gcc version 4.4.0 20090415 (prerelease) (GCC)
--
jingyu at google dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jingyu at google dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39246
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2011-02-25 14:51 ` [Bug middle-end/39246] FAIL: gcc.dg/uninit-13.c krebbel at gcc dot gnu.org
2011-02-25 15:52 ` rguenth at gcc dot gnu.org
2011-03-01 18:08 ` krebbel at gcc dot gnu.org
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2015-01-27 1:42 ` thopre01 at gcc dot gnu.org
2009-02-19 16:44 [Bug c/39246] New: " danglin at gcc dot gnu dot org
2009-04-15 20:41 ` [Bug middle-end/39246] " jingyu at google dot com
2009-05-13 10:08 ` ramana at gcc dot gnu dot org
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