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* [Bug c/63421] New: GCC generates a very misleading warning when looking at an erroneously-overloaded type
@ 2014-10-01 0:48 gccbugs at dima dot secretsauce.net
2014-10-01 12:56 ` [Bug c/63421] " manu at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: gccbugs at dima dot secretsauce.net @ 2014-10-01 0:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63421
Bug ID: 63421
Summary: GCC generates a very misleading warning when looking
at an erroneously-overloaded type
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gccbugs at dima dot secretsauce.net
Hi. I'm running gcc-4.9.1 from Debian/sid. This is built off of r214759. When
building source that had a mistake GCC produced a very misleading warning that
masked the underlying issue. A minimized test case:
typedef struct
{
int x, y, z;
} S;
struct S
{
int x;
};
S s;
void g(struct S *);
void f()
{
g(&s);
}
Here the error is that S is defined both as a struct and a typedef struct. g()
expects a 'struct S *', but I'm giving it a S*. When gcc builds this I see:
dima@shorty:/tmp/recorder$ /usr/bin/gcc-4.9 -g -O0 -Wall -Wextra -std=gnu99 -I.
-c -o dbtest.o dbtest.c
dbtest.c: In function 'f':
dbtest.c:17:5: warning: passing argument 1 of 'g' from incompatible pointer
type
g(&s);
^
dbtest.c:13:6: note: expected 'struct S *' but argument is of type 'struct S *'
void g(struct S *);
^
So it tells me that the function is getting a type mismatch, but it says that
both what it wants and what it got was 'struct S *'. This makes the complaint
look redundant.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c/63421] GCC generates a very misleading warning when looking at an erroneously-overloaded type
2014-10-01 0:48 [Bug c/63421] New: GCC generates a very misleading warning when looking at an erroneously-overloaded type gccbugs at dima dot secretsauce.net
@ 2014-10-01 12:56 ` manu at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: manu at gcc dot gnu.org @ 2014-10-01 12:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63421
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Duplicate. There is a bug in the pretty-printer and also we should do typedef
unwrapping in the C FE.
*** This bug has been marked as a duplicate of bug 56980 ***
>From gcc-bugs-return-463018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 01 12:56:58 2014
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/63422] [5.0 Regression] ICE in freqs_to_counts_path, at tree-ssa-threadupdate.c:981
Date: Wed, 01 Oct 2014 12:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63422
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 33636
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33636&action=edit
testcase
Here is a relative small testcase:
markus@x4 /tmp % g++ -flto -fprofile-use -fno-exceptions -std=gnu++0x -O2
mozilla-xremote-client.ii XRemoteClient.ii
/var/tmp/mozilla-central/widget/xremoteclient/mozilla-xremote-client.cpp: In
function ‘main’:
/var/tmp/mozilla-central/widget/xremoteclient/mozilla-xremote-client.cpp:16:5:
internal compiler error: in freqs_to_counts_path, at
tree-ssa-threadupdate.c:988
int main(int argc, char **argv)
^
0xb00cf0 freqs_to_counts_path
../../gcc/gcc/tree-ssa-threadupdate.c:988
0xb00cf0 ssa_fix_duplicate_block_edges(redirection_data*, ssa_local_info_t*)
../../gcc/gcc/tree-ssa-threadupdate.c:1061
0xb02260 ssa_fixup_template_block
../../gcc/gcc/tree-ssa-threadupdate.c:1301
0xb02260 traverse_noresize<ssa_local_info_t*, ssa_fixup_template_block>
../../gcc/gcc/hash-table.h:942
0xb02260 traverse<ssa_local_info_t*, ssa_fixup_template_block>
../../gcc/gcc/hash-table.h:964
0xb02260 thread_block_1
../../gcc/gcc/tree-ssa-threadupdate.c:1523
0xb02994 thread_block
../../gcc/gcc/tree-ssa-threadupdate.c:1560
0xb031dd thread_through_all_blocks(bool)
../../gcc/gcc/tree-ssa-threadupdate.c:2279
0xb856a1 finalize_jump_threads
../../gcc/gcc/tree-vrp.c:9856
0xb856a1 execute_vrp
../../gcc/gcc/tree-vrp.c:10010
0xb856a1 execute
../../gcc/gcc/tree-vrp.c:10073
Please submit a full bug report,
>From gcc-bugs-return-463017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 01 12:56:06 2014
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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/56980] C pretty-printer does not handle well pointer to typedef of struct
Date: Wed, 01 Oct 2014 12:56:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gccbugs at dima dot secretsauce.ne
| |t
--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 63421 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-463019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 01 13:09:49 2014
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/59805] invalid preprocessing directive not diagnosed with assembler-with-cpp
Date: Wed, 01 Oct 2014 13:09:00 -0000
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
If there's something in the preprocessor that does this deliberately for
assembler-with-cpp instead of being an accidental consequence of something
else, then it's probably working as designed.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2014-10-01 0:48 [Bug c/63421] New: GCC generates a very misleading warning when looking at an erroneously-overloaded type gccbugs at dima dot secretsauce.net
2014-10-01 12:56 ` [Bug c/63421] " manu at gcc dot gnu.org
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