[Bug middle-end/58547] New: [4.9 Regression] rtlanal.c:5482:19: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]

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From: "danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/58547] New: [4.9 Regression] rtlanal.c:5482:19: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
Date: Fri, 27 Sep 2013 00:24:00 -0000	[thread overview]
Message-ID: <bug-58547-4@http.gcc.gnu.org/bugzilla/> (raw)

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58547

            Bug ID: 58547
           Summary: [4.9 Regression] rtlanal.c:5482:19: error: comparison
                    between signed and unsigned integer expressions
                    [-Werror=sign-compare]
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: danglin at gcc dot gnu.org
              Host: hppa-unknown-linux-gnu
            Target: hppa-unknown-linux-gnu
             Build: hppa-unknown-linux-gnu

Bootstrap is broken:

/home/dave/gnu/gcc/objdir/./prev-gcc/xg++
-B/home/dave/gnu/gcc/objdir/./prev-gcc/
-B/home/dave/opt/gnu/gcc/gcc-4.9/hppa-linux-gnu/bin/ -nostdinc++
-B/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/src/.libs
-B/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/include/hppa-linux-gnu
-I/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/include
-I/home/dave/gnu/gcc/gcc/libstdc
++-v3/libsupc++
-L/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/src
/.libs
-L/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/libsupc++/.l
ibs -c   -g -O2 -DIN_GCC   -fno-exceptions -fno-rtti
-fasynchronous-unwind-table
s -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual
-Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -Werror -
fno-common  -DHAVE_CONFIG_H -I. -I. -I../../gcc/gcc -I../../gcc/gcc/.
-I../../gc
c/gcc/../include -I../../gcc/gcc/../libcpp/include 
-I../../gcc/gcc/../libdecnum
ber -I../../gcc/gcc/../libdecnumber/dpd -I../libdecnumber
-I../../gcc/gcc/../lib
backtrace -DCLOOG_INT_GMP    -o rtlanal.o -MT rtlanal.o -MMD -MP -MF
./.deps/rtl
anal.TPo ../../gcc/gcc/rtlanal.c
../../gcc/gcc/rtlanal.c: In function ‘bool lsb_bitfield_op_p(rtx)’:
../../gcc/gcc/rtlanal.c:5482:19: error: comparison between signed and unsigned
integer expressions [-Werror=sign-compare]
       return (pos == (BITS_BIG_ENDIAN ? GET_MODE_PRECISION (mode) - len : 0));
                   ^
make[3]: *** [rtlanal.o] Error 1
>From gcc-bugs-return-430638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 27 02:26:37 2013
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From: "jjcogliati-r1 at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/53001] -Wfloat-conversion should be available to warn about floating point errors
Date: Fri, 27 Sep 2013 02:26:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53001

--- Comment #18 from Joshua Cogliati <jjcogliati-r1 at yahoo dot com> ---
(In reply to Manuel López-Ibáñez from comment #17)
> (In reply to Joshua Cogliati from comment #16)
> > This does not bootstrap trunk yet, because gcc has floating conversion
> > issues and with this being enabled by -Wextra and with -Werror, gcc fails to
> > build.
> 
> Are those real bugs or normal code?

So far they seem to be normal code.  I'll try eliminating the warning on a few,
but if there are too many I'll just split the patch into the basic warning and
one that occurs on -Wextra.
>From gcc-bugs-return-430639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 27 06:01:36 2013
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From: "reichelt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/58548] New: ICE with local struct in function with auto parameter
Date: Fri, 27 Sep 2013 06:01:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idX548

            Bug ID: 58548
           Summary: ICE with local struct in function with auto parameter
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reichelt at gcc dot gnu.org

The following code snippet triggers an ICE on trunk (4.9.0 20130926) when
compiled with "-std=gnu++1y":

==========================void foo(auto)
{
  struct A { int i; };
}
==========================
bug.cc: In function 'void foo(<auto1>)':
bug.cc:3:18: error: data member 'i' cannot be a member template
   struct A { int i; };
                  ^
neu40.cc:6:18: internal compiler error: in poplevel, at cp/decl.c:560
0x554850 poplevel(int, int, int)
        ../../gcc/gcc/cp/decl.c:560
0x58e568 end_template_decl()
        ../../gcc/gcc/cp/pt.c:3786
0x62ed7b finish_fully_implicit_template
        ../../gcc/gcc/cp/parser.c:29040
0x637ad1 cp_parser_member_declaration
        ../../gcc/gcc/cp/parser.c:20086
0x6381ee cp_parser_member_specification_opt
        ../../gcc/gcc/cp/parser.c:19630
0x6381ee cp_parser_class_specifier_1
        ../../gcc/gcc/cp/parser.c:18885
0x63ab90 cp_parser_class_specifier
        ../../gcc/gcc/cp/parser.c:19101
0x63ab90 cp_parser_type_specifier
        ../../gcc/gcc/cp/parser.c:14080
0x6500a9 cp_parser_decl_specifier_seq
        ../../gcc/gcc/cp/parser.c:11328
0x654139 cp_parser_simple_declaration
        ../../gcc/gcc/cp/parser.c:10918
0x656140 cp_parser_block_declaration
        ../../gcc/gcc/cp/parser.c:10867
0x657230 cp_parser_declaration_statement
        ../../gcc/gcc/cp/parser.c:10514
0x63fad7 cp_parser_statement
        ../../gcc/gcc/cp/parser.c:9274
0x640dde cp_parser_statement_seq_opt
        ../../gcc/gcc/cp/parser.c:9552
0x640f26 cp_parser_compound_statement
        ../../gcc/gcc/cp/parser.c:9506
0x6522db cp_parser_function_body
        ../../gcc/gcc/cp/parser.c:18318
0x6522db cp_parser_ctor_initializer_opt_and_function_body
        ../../gcc/gcc/cp/parser.c:18354
0x65331f cp_parser_function_definition_after_declarator
        ../../gcc/gcc/cp/parser.c:22338
0x654027 cp_parser_function_definition_from_specifiers_and_declarator
        ../../gcc/gcc/cp/parser.c:22259
0x654027 cp_parser_init_declarator
        ../../gcc/gcc/cp/parser.c:16347
Please submit a full bug report, [etc.]

Furthermore, IMHO the error message is bogus and the code should be accepted.

next             reply	other threads:[~2013-09-27  0:24 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-27  0:24 danglin at gcc dot gnu.org [this message]
2013-09-27  8:06 ` [Bug middle-end/58547] " rguenth at gcc dot gnu.org
2013-09-27  8:46 ` ebotcazou at gcc dot gnu.org
2013-09-27  8:59 ` iains at gcc dot gnu.org
2013-09-28 17:37 ` danglin at gcc dot gnu.org

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