[Bug c++/71811] New: gcc6/c++/functional:1726:40: internal compiler error: in assign

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* [Bug c++/71811] New: gcc6/c++/functional:1726:40: internal compiler error: in assign_temp, at function.c:961
@ 2016-07-08  5:25 noloader at gmail dot com
  0 siblings, 0 replies; only message in thread
From: noloader at gmail dot com @ 2016-07-08  5:25 UTC (permalink / raw)
  To: gcc-bugs

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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71811

            Bug ID: 71811
           Summary: gcc6/c++/functional:1726:40: internal compiler error:
                    in assign_temp, at function.c:961
           Product: gcc
           Version: 6.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: noloader at gmail dot com
  Target Milestone: ---

Created attachment 38862
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38862&action=edit
Preprocessed pubkey_pkcs8 source file

I'm working on OS X 10.8.5 with MacPorts 2.3.4 installed. I'm attempting to
compile Jack Lloyd's Botan (http://github.com/randombit/botan) with GCC 6.1
from the port. Botan is a C++ TLS library.

I don't have a minimal test case because I did not write the code. I'm hoping
one of the GCC devs with C++/STL knowledge can spot the issue. Or maybe spot
the bad interaction and craft a test case.

The MacPorts bug report is at https://trac.macports.org/ticket/51796. The
MacPorts maintainers suggested to file the bug upstream.

**********

$ make
 ...

 /opt/local/bin/g++-mp-6  -m64 -pthread -fstack-protector -Wa,-q -fPIC
 -fvisibility=hidden -std=c++11 -D_REENTRANT -O3 -momit-leaf-frame-pointer
 -Wall -Wextra -Wpedantic -Wshadow -Wstrict-aliasing -Wstrict-overflow=5
 -Wcast-align -Wmissing-declarations -Wpointer-arith -Wcast-qual -Wzero-as-
 null-pointer-constant -Wnon-virtual-dtor -Ibuild/include -c
 ./src/lib/pubkey/pkcs8.cpp -o build/obj/lib/pubkey_pkcs8.o
 In file included from /opt/local/include/gcc6/c++/memory:79:0,
                  from build/include/botan/types.h:16,
                  from build/include/botan/mem_ops.h:11,
                  from build/include/botan/secmem.h:11,
                  from build/include/botan/pk_keys.h:11,
                  from build/include/botan/x509_key.h:11,
                  from build/include/botan/pkcs8.h:11,
                  from ./src/lib/pubkey/pkcs8.cpp:8:
 /opt/local/include/gcc6/c++/functional: In static member function 'static
 _Res std::_Function_handler<_Res(_ArgTypes ...),
 _Functor>::_M_invoke(const std::_Any_data&, _ArgTypes&& ...) [with _Res =
 std::__cxx11::basic_string<char>; _Functor =
 Botan::PKCS8::load_key(Botan::DataSource&,
 Botan::RandomNumberGenerator&)::<lambda()>; _ArgTypes = {}]':
 /opt/local/include/gcc6/c++/functional:1726:40: internal compiler error:
 in assign_temp, at function.c:961
       std::forward<_ArgTypes>(__args)...);
                                         ^

 /opt/local/include/gcc6/c++/functional:1726:40: internal compiler error:
 Abort trap: 6
 g++-mp-6: internal compiler error: Abort trap: 6 (program cc1plus)
 Please submit a full bug report,
 with preprocessed source if appropriate.
 See <https://trac.macports.org/newticket> for instructions.
 Makefile:1152: recipe for target 'build/obj/lib/pubkey_pkcs8.o' failed
 make: *** [build/obj/lib/pubkey_pkcs8.o] Error 4


*****

Here's Botan's configuration. Also note the configuration uses -Wa,-q, which
means the Clang integrated assembler is used. I dont know if it makes a
difference, but its mentioned for completeness.

 $ ./configure.py --os=darwin --cc=gcc --cpu=x86_64 --cc-
 bin=/opt/local/bin/g++-mp-6 --cc-abi-flags="-Wa,-q"
    INFO: Platform: OS="Darwin" machine="x86_64" proc="i386"
    INFO: Canonicalizized CPU target x86_64 to x86_64/x86_64
    INFO: Target is gcc-darwin-x86_64-x86_64
    INFO: Skipping, dependency failure - sessions_sqlite3
    INFO: Skipping, incompatible CPU - mp_x86_32 simd_altivec
    INFO: Skipping, incompatible OS - beos_stats cryptoapi_rng win32_stats
    INFO: Skipping, incompatible compiler - mp_x86_32_msvc
    INFO: Skipping, only used if needed or requested - dyn_load mp_generic
 simd_scalar
    INFO: Skipping, requires external dependency - boost bzip2 lzma openssl
 pkcs11 sqlite3 tpm zlib
    INFO: Using MP module mp_x86_64
    INFO: Using SIMD module simd_sse2
    INFO: Loading modules adler32 aead aes aes_ni aes_ssse3 aont asn1
 auto_rng base base64 bcrypt bigint blake2 block blowfish camellia cascade
 cast cbc cbc_mac ccm cfb chacha chacha20poly1305 clmul cmac codec_filt
 comb4p compression crc24 crc32 cryptobox ctr curve25519 darwin_secrandom
 datastor des dev_random dh dl_algo dl_group dlies dsa eax ec_gfp ec_group
 ecb ecc_key ecdh ecdsa ecgdsa ecies eckcdsa egd elgamal eme_oaep eme_pkcs1
 eme_raw emsa1 emsa_pkcs1 emsa_pssr emsa_raw emsa_x931 entropy fd_unix ffi
 filters fpe_fe1 gcm gost_28147 gost_3410 gost_3411 has160 hash hash_id hex
 hkdf hmac hmac_drbg hmac_rng hres_timer http_util idea idea_sse2 if_algo
 kasumi kdf kdf1 kdf1_iso18033 kdf2 keccak keypair lion locking_allocator
 mac mars mce mceies md2 md4 md5 mdx_hash mgf1 misty1 mode_pad modes mp
 mp_x86_64 noekeon noekeon_simd nr numbertheory ocb ofb oid_lookup openpgp
 par_hash passhash9 pbes2 pbkdf pbkdf1 pbkdf2 pem pk_pad poly1305 prf_tls
 prf_x942 proc_walk pubkey rc2 rc4 rc5 rc6 rdrand rdseed rfc3394 rfc6979
 rmd128 rmd160 rng rsa rw safer salsa20 seed serpent serpent_simd
 sessions_sql sha1 sha1_sse2 sha2_32 sha2_64 simd simd_sse2 siphash siv
 skein sp800_108 sp800_56c srp6 stream system_rng tea threefish
 threefish_avx2 tiger tls tss twofish unix_procs utils whirlpool x509
 x919_mac x931_rng xtea xtea_simd xts
    INFO: Assuming CPU is little endian
    INFO: Assuming unaligned memory access works
    INFO: Using symlink to link files into build dir (use --link-method to
 change)
    INFO: Botan 1.11.31 (unreleased undated) build setup is complete
 ...
>From gcc-bugs-return-530038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 05:29:57 2016
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/71801] [7 Regression] ice in fix_debug_reg_uses
Date: Fri, 08 Jul 2016 05:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71801

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-07-08
                 CC|                            |trippels at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat bug_.i
struct {
  char uuid[16];
} c;
struct {
  int s_uuid[6];
} a, b;
void *memcpy();
int lseek();
static int get_label_uuid(char *p1) {
  memcpy(p1, a.s_uuid, sizeof(a));
  if (lseek())
    memcpy(p1, b.s_uuid, sizeof(b));
  return 0;
}
void uuidcache_addentry(char *p1) { memcpy(&c, p1, sizeof(c)); }
void uuidcache_init() {
  char d[1];
  get_label_uuid(d);
  uuidcache_addentry(d);
}

markus@x4 tmp % gcc -c -O2 -g bug_.i
bug_.i: In function â€˜uuidcache_initâ€™:
bug_.i:20:1: internal compiler error: in fix_debug_reg_uses, at
config/i386/i386.c:3818
 }
 ^
0xe92015 timode_scalar_chain::fix_debug_reg_uses(rtx_def*)
        ../../gcc/gcc/config/i386/i386.c:3817
0xea5482 timode_scalar_chain::fix_debug_reg_uses(rtx_def*)
        ../../gcc/gcc/config/i386/i386.c:3799
0xea5482 timode_scalar_chain::convert_insn(rtx_insn*)
        ../../gcc/gcc/config/i386/i386.c:3844
0xea5d04 scalar_chain::convert()
        ../../gcc/gcc/config/i386/i386.c:3932
0xea64f6 convert_scalars_to_vector
        ../../gcc/gcc/config/i386/i386.c:3998
0xea64f6 execute
        ../../gcc/gcc/config/i386/i386.c:4092
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-530039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 05:30:41 2016
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From: "noloader at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/71812] New: gcc6/c++/functional:1726:40: internal compiler error: in assign_temp, at function.c:961
Date: Fri, 08 Jul 2016 05:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71812

            Bug ID: 71812
           Summary: gcc6/c++/functional:1726:40: internal compiler error:
                    in assign_temp, at function.c:961
           Product: gcc
           Version: 6.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: noloader at gmail dot com
  Target Milestone: ---

I'm working on OS X 10.8.5 with MacPorts 2.3.4 installed. I'm attempting to
compile Jack Lloyd's Botan (http://github.com/randombit/botan) with GCC 6.1
from the port. Botan is a C++ TLS library.

I don't have a minimal test case because I did not write the code. I'm hoping
one of the GCC devs with C++/STL knowledge can spot the issue. Or maybe spot
the bad interaction and craft a test case.

The MacPorts bug report is at https://trac.macports.org/ticket/51796. The
MacPorts maintainers suggested to file the bug upstream.

**********

I can't submit pubkey_pkcs8.ii.zip. It appears to be causing Gateway Timeouts.

**********

$ make
 ...

 /opt/local/bin/g++-mp-6  -m64 -pthread -fstack-protector -Wa,-q -fPIC
 -fvisibility=hidden -std=c++11 -D_REENTRANT -O3 -momit-leaf-frame-pointer
 -Wall -Wextra -Wpedantic -Wshadow -Wstrict-aliasing -Wstrict-overflow=5
 -Wcast-align -Wmissing-declarations -Wpointer-arith -Wcast-qual -Wzero-as-
 null-pointer-constant -Wnon-virtual-dtor -Ibuild/include -c
 ./src/lib/pubkey/pkcs8.cpp -o build/obj/lib/pubkey_pkcs8.o
 In file included from /opt/local/include/gcc6/c++/memory:79:0,
                  from build/include/botan/types.h:16,
                  from build/include/botan/mem_ops.h:11,
                  from build/include/botan/secmem.h:11,
                  from build/include/botan/pk_keys.h:11,
                  from build/include/botan/x509_key.h:11,
                  from build/include/botan/pkcs8.h:11,
                  from ./src/lib/pubkey/pkcs8.cpp:8:
 /opt/local/include/gcc6/c++/functional: In static member function 'static
 _Res std::_Function_handler<_Res(_ArgTypes ...),
 _Functor>::_M_invoke(const std::_Any_data&, _ArgTypes&& ...) [with _Res =
 std::__cxx11::basic_string<char>; _Functor =
 Botan::PKCS8::load_key(Botan::DataSource&,
 Botan::RandomNumberGenerator&)::<lambda()>; _ArgTypes = {}]':
 /opt/local/include/gcc6/c++/functional:1726:40: internal compiler error:
 in assign_temp, at function.c:961
       std::forward<_ArgTypes>(__args)...);
                                         ^

 /opt/local/include/gcc6/c++/functional:1726:40: internal compiler error:
 Abort trap: 6
 g++-mp-6: internal compiler error: Abort trap: 6 (program cc1plus)
 Please submit a full bug report,
 with preprocessed source if appropriate.
 See <https://trac.macports.org/newticket> for instructions.
 Makefile:1152: recipe for target 'build/obj/lib/pubkey_pkcs8.o' failed
 make: *** [build/obj/lib/pubkey_pkcs8.o] Error 4


*****

Here's Botan's configuration. Also note the configuration uses -Wa,-q, which
means the Clang integrated assembler is used. I dont know if it makes a
difference, but its mentioned for completeness.

 $ ./configure.py --os=darwin --cc=gcc --cpu=x86_64 --cc-
 bin=/opt/local/bin/g++-mp-6 --cc-abi-flags="-Wa,-q"
    INFO: Platform: OS="Darwin" machine="x86_64" proc="i386"
    INFO: Canonicalizized CPU target x86_64 to x86_64/x86_64
    INFO: Target is gcc-darwin-x86_64-x86_64
    INFO: Skipping, dependency failure - sessions_sqlite3
    INFO: Skipping, incompatible CPU - mp_x86_32 simd_altivec
    INFO: Skipping, incompatible OS - beos_stats cryptoapi_rng win32_stats
    INFO: Skipping, incompatible compiler - mp_x86_32_msvc
    INFO: Skipping, only used if needed or requested - dyn_load mp_generic
 simd_scalar
    INFO: Skipping, requires external dependency - boost bzip2 lzma openssl
 pkcs11 sqlite3 tpm zlib
    INFO: Using MP module mp_x86_64
    INFO: Using SIMD module simd_sse2
    INFO: Loading modules adler32 aead aes aes_ni aes_ssse3 aont asn1
 auto_rng base base64 bcrypt bigint blake2 block blowfish camellia cascade
 cast cbc cbc_mac ccm cfb chacha chacha20poly1305 clmul cmac codec_filt
 comb4p compression crc24 crc32 cryptobox ctr curve25519 darwin_secrandom
 datastor des dev_random dh dl_algo dl_group dlies dsa eax ec_gfp ec_group
 ecb ecc_key ecdh ecdsa ecgdsa ecies eckcdsa egd elgamal eme_oaep eme_pkcs1
 eme_raw emsa1 emsa_pkcs1 emsa_pssr emsa_raw emsa_x931 entropy fd_unix ffi
 filters fpe_fe1 gcm gost_28147 gost_3410 gost_3411 has160 hash hash_id hex
 hkdf hmac hmac_drbg hmac_rng hres_timer http_util idea idea_sse2 if_algo
 kasumi kdf kdf1 kdf1_iso18033 kdf2 keccak keypair lion locking_allocator
 mac mars mce mceies md2 md4 md5 mdx_hash mgf1 misty1 mode_pad modes mp
 mp_x86_64 noekeon noekeon_simd nr numbertheory ocb ofb oid_lookup openpgp
 par_hash passhash9 pbes2 pbkdf pbkdf1 pbkdf2 pem pk_pad poly1305 prf_tls
 prf_x942 proc_walk pubkey rc2 rc4 rc5 rc6 rdrand rdseed rfc3394 rfc6979
 rmd128 rmd160 rng rsa rw safer salsa20 seed serpent serpent_simd
 sessions_sql sha1 sha1_sse2 sha2_32 sha2_64 simd simd_sse2 siphash siv
 skein sp800_108 sp800_56c srp6 stream system_rng tea threefish
 threefish_avx2 tiger tls tss twofish unix_procs utils whirlpool x509
 x919_mac x931_rng xtea xtea_simd xts
    INFO: Assuming CPU is little endian
    INFO: Assuming unaligned memory access works
    INFO: Using symlink to link files into build dir (use --link-method to
 change)
    INFO: Botan 1.11.31 (unreleased undated) build setup is complete
 ...
>From gcc-bugs-return-530040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 05:35:43 2016
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Subject: [Bug c/71812] gcc6/c++/functional:1726:40: internal compiler error: in assign_temp, at function.c:961
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71812

--- Comment #1 from Jeffrey Walton <noloader at gmail dot com> ---

> I can't submit pubkey_pkcs8.ii.zip. It appears to be causing Gateway
> Timeouts.

The preprocessed source file is available at
https://trac.macports.org/ticket/51796#no1
>From gcc-bugs-return-530042-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 05:58:55 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71814] New: ICE on valid C++11 code: in write_type, at cp/mangle.c:2158
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71814

            Bug ID: 71814
           Summary: ICE on valid C++11 code: in write_type, at
                    cp/mangle.c:2158
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu
  Target Milestone: ---

The following C++11 code causes an ICE when compiled with the current GCC trunk
on x86_64-linux-gnu in both 32-bit and 64-bit modes.  

It also affects 6.1.x and is a regression from 5.4.x. 


$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160707 (experimental) [trunk revision 238117] (GCC)
$
$ g++-5.4 -std=c++11 -c small.cpp
$ clang++-3.8 -std=c++11 -c small.cpp
$
$ g++-trunk -std=c++11 -c small.cpp
small.cpp: In instantiation of â€˜void foo(int (&)[sizeof (int, U ..., int,
typename U::type ...)]) [with U = {A<int>, A<float>}; TN<int, U ..., int,
typename U::type ...> = int [6]]â€™:
small.cpp:8:57:   required from here
small.cpp:6:6: internal compiler error: in write_type, at cp/mangle.c:2158
 void foo (TN < int, U ..., int, typename U::type ... >&) {}
      ^~~
0x861088 write_type
        ../../gcc-source-trunk/gcc/cp/mangle.c:2158
0x8622aa write_array_type
        ../../gcc-source-trunk/gcc/cp/mangle.c:3319
0x8622aa write_type
        ../../gcc-source-trunk/gcc/cp/mangle.c:1935
0x861411 write_type
        ../../gcc-source-trunk/gcc/cp/mangle.c:2082
0x8639d7 write_method_parms
        ../../gcc-source-trunk/gcc/cp/mangle.c:2602
0x863d70 write_bare_function_type
        ../../gcc-source-trunk/gcc/cp/mangle.c:2544
0x865f25 mangle_decl_string
        ../../gcc-source-trunk/gcc/cp/mangle.c:3515
0x866078 get_mangled_id
        ../../gcc-source-trunk/gcc/cp/mangle.c:3537
0x866348 mangle_decl(tree_node*)
        ../../gcc-source-trunk/gcc/cp/mangle.c:3607
0x10605b0 decl_assembler_name(tree_node*)
        ../../gcc-source-trunk/gcc/tree.c:669
0x10b1d68 notice_global_symbol(tree_node*)
        ../../gcc-source-trunk/gcc/varasm.c:1654
0x9c2149 cgraph_node::finalize_function(tree_node*, bool)
        ../../gcc-source-trunk/gcc/cgraphunit.c:426
0x81a96f expand_or_defer_fn(tree_node*)
        ../../gcc-source-trunk/gcc/cp/semantics.c:4223
0x6d4c1a instantiate_decl(tree_node*, int, bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:22118
0x721842 instantiate_pending_templates(int)
        ../../gcc-source-trunk/gcc/cp/pt.c:22214
0x764975 c_parse_final_cleanups()
        ../../gcc-source-trunk/gcc/cp/decl2.c:4600
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.


----------------------------------------------------------------


template < typename > struct A {  using type = int;  };

template < typename ... T > using TN = int[sizeof ... (T)];

template < typename ... U >
void foo (TN < int, U ..., int, typename U::type ... >&) {}

template void foo < A < int >, A < float > > (int (&)[6]);
>From gcc-bugs-return-530041-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 05:58:55 2016
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Subject: [Bug c/71813] New: fprintf/printf function exception
Date: Fri, 08 Jul 2016 05:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71813

            Bug ID: 71813
           Summary: fprintf/printf function exception
           Product: gcc
           Version: 4.9.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: szhebin at yahoo dot com
  Target Milestone: ---

I wrote a program:
#include <string.h>
#include <stdio.h>

char *test2()
{
        char testArray[2];
        char *testP;

        memcpy(testArray, "2", 2);

        testP = testArray;

        return testP;
}

char *test()
{
        return test2();
}

int main()
{
        char *ret;

        ret = test();

        fprintf(stdout, "%s\n", ret);

        return 0;
}

but, when I ran it, it output some things that people cannot understand.
such as:'ï¿½d/
when I changed fprintf to printf, it output NULL.
then, I use gdb-7.10.1 to check it, 
I could know:
before fprintf/printf, the value of ret is correct.
but after fprintf/printf, it went wrong.
>From gcc-bugs-return-530043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 06:11:08 2016
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Subject: [Bug c/71813] fprintf/printf function exception
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71813

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
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         Resolution|---                         |INVALID

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
testArray goes out of scope and you access it outside of the scope.  Undefined
behavior.
>From gcc-bugs-return-530044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 06:47:24 2016
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Subject: [Bug target/71801] [7 Regression] ice in fix_debug_reg_uses
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71801

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hjl.tools at gmail dot com

--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r237647.
>From gcc-bugs-return-530045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:08:40 2016
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Subject: [Bug tree-optimization/71815] New: SLSR misses several PHI candidate cases
Date: Fri, 08 Jul 2016 07:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71815

            Bug ID: 71815
           Summary: SLSR misses several PHI candidate cases
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

Derived from gcc.dg/tree-ssa/slsr-3[56].c which fail with code hoisting
enabled.

int                                                                             
f (int s, int c, int i)                                                         
{                                                                               
  int a1, a3, x1, x3, x;                                                        

  a1 = i * s;                                                                   
  x1 = c + a1;                                                                  
  i = i + 2;                                                                    

  if (x1 > 6)                                                                   
    i = i + 2;                                                                  

  a3 = i * s;                                                                   
  x3 = c + a3;                                                                  

  x = x1 + x3;                                                                  
  return x;                                                                     
}                 

fails to SLSR properly.  With forwprop enabled the conditional i increment
gets rewritten to i = i + 4 and i = i + 2 is sunk into the else arm
which is handled but in a suboptimal way:

  <bb 2>:
  a1_4 = i_2(D) * s_3(D);
  x1_6 = a1_4 + c_5(D);
  if (x1_6 > 6)
    goto <bb 4>;
  else
    goto <bb 3>;

  <bb 3>:
  i_7 = i_2(D) + 2;
  slsr_16 = s_3(D) * 2;
  slsr_14 = a1_4 + slsr_16;
  goto <bb 5>;

  <bb 4>:
  i_8 = i_2(D) + 4;
  slsr_15 = s_3(D) * 4;
  slsr_13 = a1_4 + slsr_15;

  <bb 5>:
  # i_1 = PHI <i_7(3), i_8(4)>
  # slsr_17 = PHI <slsr_14(3), slsr_13(4)>
  a3_9 = slsr_17;
  x3_10 = c_5(D) + a3_9;
  x_11 = x1_6 + x3_10;
  return x_11;

when code-hoisting is enabled on gcc.dg/tree-ssa/slsr-3[56].c we get the same
effect as with -fno-tree-forwprop on the above testcase - the increment after
the if gets hoisted before it, and slsr fails:

  <bb 2>:
  a1_4 = i_2(D) * s_3(D);
  x1_6 = c_5(D) + a1_4;
  i_7 = i_2(D) + 2;
  if (x1_6 > 6)
    goto <bb 3>;
  else
    goto <bb 4>;

  <bb 3>:
  i_8 = i_7 + 2;
  slsr_16 = s_3(D) * 4;

  <bb 4>:
  # i_1 = PHI <i_7(2), i_8(3)>
  a3_9 = i_1 * s_3(D);
  x3_10 = c_5(D) + a3_9;
  x_11 = x1_6 + x3_10;
  return x_11;
>From gcc-bugs-return-530046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:17:51 2016
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Subject: [Bug c++/69797] [4.9 Regression] ICE on invalid code on x86_64-linux-gnu in operator[], at vec.h:714
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/67767] -Wsuggest-attribute=noreturn suggests noreturn for function which already has noreturn and cold.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:19:20 2016
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Subject: [Bug rtl-optimization/69891] wrong code with -mstringop-strategy=libcall @ i686
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69891

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:20:03 2016
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Subject: [Bug tree-optimization/70152] [4.9 Regression] gcc ICE at -O3 and above on valid code on x86_64-linux-gnu in "replace_uses_by"
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:20:18 2016
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Subject: [Bug tree-optimization/70169] [4.9 Regression] ICE at -O1 and above on x86_64-linux-gnu in gen_lsm_tmp_name, at tree-ssa-loop.c:791
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:21:31 2016
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Subject: [Bug rtl-optimization/70222] Test miscompiled with -O1
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:21:49 2016
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Subject: [Bug rtl-optimization/70429] Wrong code with -O1.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:22:35 2016
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Subject: [Bug middle-end/71494] [4.9 Regression] label as value in nested function
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:22:16 2016
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Subject: [Bug sanitizer/71160] libasan: Backport support for malloc within dlsym
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Backported to all open release branches.
>From gcc-bugs-return-530058-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:23:49 2016
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Subject: [Bug fortran/71705] [4.9 Regression] ICE in lower_omp_target, at omp-low.c:16136
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530057-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:23:29 2016
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Subject: [Bug middle-end/71626] [4.9 regression] ICE at -O1 and above on x86_64-linux-gnu (in output_constant_pool_2, at varasm.c:3837)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71626

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:23:11 2016
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Subject: [Bug tree-optimization/71588] [4.9 Regression] ICE on valid code at -O2 and -O3 on x86_64-linux-gnu: in execute_todo, at passes.c:2009
Date: Fri, 08 Jul 2016 07:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71588

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:24:11 2016
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Subject: [Bug fortran/71704] ICE with -fopenmp and some omp constructs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71704

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:24:41 2016
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Subject: [Bug fortran/71717] A gfortran silent "wrong code" bug in the transition from 4.9.0 -> 4.9.1, using OpenMP.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71717

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-530061-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:27:59 2016
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Subject: [Bug tree-optimization/71802] [7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in expand_LOOP_VECTORIZED
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71802

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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                 CC|                            |jakub at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r236440.
>From gcc-bugs-return-530063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:35:25 2016
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Subject: [Bug c++/71814] [6/7 Regression] ICE on valid C++11 code: in write_type, at cp/mangle.c:2158
Date: Fri, 08 Jul 2016 07:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71814

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-07-08
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |jason at gcc dot gnu.org
   Target Milestone|---                         |6.2
            Summary|ICE on valid C++11 code: in |[6/7 Regression] ICE on
                   |write_type, at              |valid C++11 code: in
                   |cp/mangle.c:2158            |write_type, at
                   |                            |cp/mangle.c:2158
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r233758.
>From gcc-bugs-return-530062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:35:04 2016
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Subject: [Bug fortran/71807] [5/6/7 Regression] Internal compiler error with NULL() reference in structure constructor
Date: Fri, 08 Jul 2016 07:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71807

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-07-08
                 CC|                            |marxin at gcc dot gnu.org
   Target Milestone|---                         |5.5
            Summary|Internal compiler error     |[5/6/7 Regression] Internal
                   |with NULL() reference in    |compiler error with NULL()
                   |structure constructor       |reference in structure
                   |                            |constructor
     Ever confirmed|0                           |1

--- Comment #1 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Confirmed, it's a regression since GCC 5.
>From gcc-bugs-return-530064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:36:30 2016
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Subject: [Bug c/71812] gcc6/c++/functional:1726:40: internal compiler error: in assign_temp, at function.c:961
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71812

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
If you are using 6.1.0 release, then try using a newer 6.1.1 snapshot instead.
This is very likely fixed already.
>From gcc-bugs-return-530065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:37:23 2016
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Subject: [Bug c++/71808] [concepts] ICE in finish_member_declaration
Date: Fri, 08 Jul 2016 07:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71808

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-07-08
                 CC|                            |marxin at gcc dot gnu.org
     Ever confirmed|0                           |1
      Known to fail|                            |6.1.0

--- Comment #1 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-530066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:41:07 2016
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Subject: [Bug c++/71811] gcc6/c++/functional:1726:40: internal compiler error: in assign_temp, at function.c:961
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Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |marxin at gcc dot gnu.org

--- Comment #1 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Can't reproduce that on x86_64-linux-gnu.
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Subject: [Bug fortran/71807] [5/6/7 Regression] Internal compiler error with NULL() reference in structure constructor
Date: Fri, 08 Jul 2016 07:44:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |vehre at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r219801.
>From gcc-bugs-return-530068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 07:50:18 2016
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Subject: [Bug fortran/71799] [7 Regression] ICE in DO loop code emission (gfc_resolve_iterator)
Date: Fri, 08 Jul 2016 07:50:00 -0000
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--- Comment #2 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
(In reply to kargl from comment #1)
> Index: resolve.c
> ===================================================================
> --- resolve.c	(revision 237855)
> +++ resolve.c	(working copy)
> @@ -6515,15 +6515,15 @@ gfc_resolve_iterator (gfc_iterator *iter
>    /* Convert start, end, and step to the same type as var.  */
>    if (iter->start->ts.kind != iter->var->ts.kind
>        || iter->start->ts.type != iter->var->ts.type)
> -    gfc_convert_type (iter->start, &iter->var->ts, 2);
> +    gfc_convert_type (iter->start, &iter->var->ts, 1);
>  
>    if (iter->end->ts.kind != iter->var->ts.kind
>        || iter->end->ts.type != iter->var->ts.type)
> -    gfc_convert_type (iter->end, &iter->var->ts, 2);
> +    gfc_convert_type (iter->end, &iter->var->ts, 1);
>  
>    if (iter->step->ts.kind != iter->var->ts.kind
>        || iter->step->ts.type != iter->var->ts.type)
> -    gfc_convert_type (iter->step, &iter->var->ts, 2);
> +    gfc_convert_type (iter->step, &iter->var->ts, 1);
>  
>    if (iter->start->expr_type == EXPR_CONSTANT
>        && iter->end->expr_type == EXPR_CONSTANT

Thank you for the patch, are you going to test it and send to ML?
I can do it, if you want?
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Subject: [Bug middle-end/71606] [4.9/5/6/7 Regression] ICE on -O2 and above on x86_64-linux-gnu (internal compiler error: in get_expr_operands, at tree-ssa-operands.c:882)
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--- Comment #3 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Jul  8 07:52:03 2016
New Revision: 238157

URL: https://gcc.gnu.org/viewcvs?rev=238157&root=gcc&view=rev
Log:
Do not consider COMPLEX_TYPE as fold_convertible_p

        PR middle-end/71606
        * fold-const.c (fold_convertible_p): As COMPLEX_TYPE
        folding produces SAVE_EXPRs, thus return false for the type.
        * gcc.dg/torture/pr71606.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr71606.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/71606] [4.9/5/6 Regression] ICE on -O2 and above on x86_64-linux-gnu (internal compiler error: in get_expr_operands, at tree-ssa-operands.c:882)
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Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.9/5/6/7 Regression] ICE  |[4.9/5/6 Regression] ICE on
                   |on -O2 and above on         |-O2 and above on
                   |x86_64-linux-gnu (internal  |x86_64-linux-gnu (internal
                   |compiler error: in          |compiler error: in
                   |get_expr_operands, at       |get_expr_operands, at
                   |tree-ssa-operands.c:882)    |tree-ssa-operands.c:882)

--- Comment #4 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Fixed on trunk, I've been testing backports.
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Subject: [Bug c/71812] gcc6/c++/functional:1726:40: internal compiler error: in assign_temp, at function.c:961
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Duplicate of PR71811?
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Subject: [Bug libstdc++/71809] compile llvm3.8.0 failed by the libstdc++ of gcc6.1.0
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
clang bug
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Subject: [Bug tree-optimization/71802] [7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in expand_LOOP_VECTORIZED
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will investigate.
>From gcc-bugs-return-530074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 08:34:26 2016
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Subject: [Bug c++/71814] [6/7 Regression] ICE on valid C++11 code: in write_type, at cp/mangle.c:2158
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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           Priority|P3                          |P2
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Subject: [Bug fortran/71807] [5/6/7 Regression] Internal compiler error with NULL() reference in structure constructor
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug fortran/71783] [5/6/7 Regression ] ICE on valid code in gimplify_var_or_parm_decl at gimplify.c:1801
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug rtl-optimization/71779] [5/6/7 regression] isl miscompiled with -mabi=ilp32
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug target/71778] [6/7 Regression][ARM] ICE using non-constant argument to Neon intrinsic that requires constant arguments
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71774] [5/6/7 regression] Bogus "is protected" error when list-initializing a base class with a defaulted protected constructor and a virtual function
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug middle-end/71762] [4.9/5/6/7 Regression] ~X & Y to X < Y doesn't work for uninitialized values
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug fortran/71764] [4.9/5/6/7 Regression] ICE in gfc_trans_structure_assign
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71756] [6/7 Regression] internal compiler error: in ~saved_token_sentinel, at cp/parser.c:1228
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71748] [4.9/5/6/7 Regression] ICE on valid (?) C++ template code invoking a base destructor: in build_base_path, at cp/class.c:304
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71747] [4.9/5/6/7 Regression] ICE on invalid C++11 code with misuse of overloaded operator '()': Segmentation fault (program cc1plus)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71747

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71738] [4.9/5/6/7 Regression] ICE on valid C++ code: tree check: expected record_type or union_type or qual_union_type, have template_decl in lookup_template_class_1, at cp/pt.c:8619
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71738

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71737] [4.9/5/6/7 Regression] ICE following 2x pack expansion in non-pack with template alias
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71737

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug bootstrap/71816] New: [7 Regression] bootstrap broken on armhf-linux-gnuabihf
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71816

            Bug ID: 71816
           Summary: [7 Regression] bootstrap broken on
                    armhf-linux-gnuabihf
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org
  Target Milestone: ---

seen with r238117, gcc configured with

         --enable-languages=c,ada,c++,java,go,fortran,objc,obj-c++
         --prefix=/usr/lib/gcc-snapshot
         --enable-shared
         --enable-linker-build-id
         --disable-nls
         --with-sysroot=/
         --enable-clocale=gnu
         --enable-libstdcxx-debug
         --enable-libstdcxx-time=yes
         --with-default-libstdcxx-abi=new
         --enable-gnu-unique-object
         --disable-libitm
         --disable-libquadmath
         --enable-plugin
         --with-system-zlib
         --enable-multiarch
         --enable-multilib
         --disable-sjlj-exceptions
         --with-arch=armv7-a
         --with-fpu=vfpv3-d16
         --with-float=hard
         --with-mode=thumb
         --disable-werror
         --enable-multilib
         --enable-checking=yes
         --build=arm-linux-gnueabihf
         --host=arm-linux-gnueabihf
         --target=arm-linux-gnueabihf


/Â«PKGBUILDDIRÂ»/build/./prev-gcc/xg++ -B/Â«PKGBUILDDIRÂ»/build/./prev-gcc/
-B/usr/lib/gcc-snapshot/arm-linux-gnueabihf/bin/ -nostdinc++
-B/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-B/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs 
-I/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/include/arm-linux-gnueabihf
 -I/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/include 
-I/Â«PKGBUILDDIRÂ»/src/libstdc++-v3/libsupc++
-L/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-L/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs -c
  -g -O2 -gtoggle -DIN_GCC     -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common 
-DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -I. -Ibuild -I../../src/gcc
-I../../src/gcc/build -I../../src/gcc/../include 
-I../../src/gcc/../libcpp/include  \
        -o build/genattrtab.o ../../src/gcc/genattrtab.c
/Â«PKGBUILDDIRÂ»/build/./prev-gcc/xg++ -B/Â«PKGBUILDDIRÂ»/build/./prev-gcc/
-B/usr/lib/gcc-snapshot/arm-linux-gnueabihf/bin/ -nostdinc++
-B/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-B/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs 
-I/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/include/arm-linux-gnueabihf
 -I/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/include 
-I/Â«PKGBUILDDIRÂ»/src/libstdc++-v3/libsupc++
-L/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-L/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs -c
  -g -O2 -gtoggle -DIN_GCC     -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common 
-DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -I. -Ibuild -I../../src/gcc
-I../../src/gcc/build -I../../src/gcc/../include 
-I../../src/gcc/../libcpp/include  \
        -o build/genautomata.o ../../src/gcc/genautomata.c
/Â«PKGBUILDDIRÂ»/build/./prev-gcc/xg++ -B/Â«PKGBUILDDIRÂ»/build/./prev-gcc/
-B/usr/lib/gcc-snapshot/arm-linux-gnueabihf/bin/ -nostdinc++
-B/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-B/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs 
-I/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/include/arm-linux-gnueabihf
 -I/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/include 
-I/Â«PKGBUILDDIRÂ»/src/libstdc++-v3/libsupc++
-L/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-L/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs -c
  -g -O2 -gtoggle -DIN_GCC     -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common 
-DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -I. -Ibuild -I../../src/gcc
-I../../src/gcc/build -I../../src/gcc/../include 
-I../../src/gcc/../libcpp/include  \
        -o build/genemit.o ../../src/gcc/genemit.c
/Â«PKGBUILDDIRÂ»/build/./prev-gcc/xg++ -B/Â«PKGBUILDDIRÂ»/build/./prev-gcc/
-B/usr/lib/gcc-snapshot/arm-linux-gnueabihf/bin/ -nostdinc++
-B/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-B/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs 
-I/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/include/arm-linux-gnueabihf
 -I/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/include 
-I/Â«PKGBUILDDIRÂ»/src/libstdc++-v3/libsupc++
-L/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-L/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs -c
  -g -O2 -gtoggle -DIN_GCC     -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common 
-DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -I. -Ibuild -I../../src/gcc
-I../../src/gcc/build -I../../src/gcc/../include 
-I../../src/gcc/../libcpp/include  \
        -o build/genextract.o ../../src/gcc/genextract.c
../../src/gcc/genattrtab.c: In function 'rtx_def* simplify_and_tree(rtx,
rtx_def**, int, int)':
../../src/gcc/genattrtab.c:2131:1: error: non-trivial conversion at assignment
 simplify_and_tree (rtx exp, rtx *pterm, int insn_code, int insn_index)
 ^~~~~~~~~~~~~~~~~
struct rtx_def *
int
# VUSE <.MEM_52>
pretmp_133 = MEM[(union u *)_19 + 8B];
../../src/gcc/genattrtab.c:2131:1: internal compiler error: verify_gimple
failed
/Â«PKGBUILDDIRÂ»/build/./prev-gcc/xg++ -B/Â«PKGBUILDDIRÂ»/build/./prev-gcc/
-B/usr/lib/gcc-snapshot/arm-linux-gnueabihf/bin/ -nostdinc++
-B/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-B/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs 
-I/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/include/arm-linux-gnueabihf
 -I/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/include 
-I/Â«PKGBUILDDIRÂ»/src/libstdc++-v3/libsupc++
-L/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-L/Â«PKGBUILDDIRÂ»/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs -c
  -g -O2 -gtoggle -DIN_GCC     -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common 
-DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -I. -Ibuild -I../../src/gcc
-I../../src/gcc/build -I../../src/gcc/../include 
-I../../src/gcc/../libcpp/include  \
        -o build/genoutput.o ../../src/gcc/genoutput.c
0xaff49d verify_gimple_in_cfg(function*, bool)
        ../../src/gcc/tree-cfg.c:5212
0x9debbd execute_function_todo
        ../../src/gcc/passes.c:1964
0x9dde91 do_per_function
        ../../src/gcc/passes.c:1648
0x9ded6b execute_todo
        ../../src/gcc/passes.c:2016
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.
>From gcc-bugs-return-530088-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 08:44:55 2016
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Subject: [Bug c++/71728] [5/6/7 Regression] ICE with goto in statement-expression inside a condition
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71728

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2
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From: "doko at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70997] [7 Regression] bootstrap broken on s390x-linux-gnu
Date: Fri, 08 Jul 2016 08:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70997

Matthias Klose <doko at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #2 from Matthias Klose <doko at gcc dot gnu.org> ---
apparently this works again with 20160707.
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Subject: [Bug fortran/71723] [4.9/5/6/7 Regression] ICE with attempted pointer initialization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71723

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71718] [6/7 Regression] ICE on erroneous recursive template error printing
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71718

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71711] [6/7 Regression] ICE on valid C++1z code with fold expression: tree check: expected tree_vec, have expr_pack_expansion in tsubst_unary_left_fold, at cp/pt.c:10792
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71711

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug fortran/71706] [6/7 Regression] ICE on using sync images with integer(kind<>4), with -fcoarray=lib -fcheck=bounds
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71706

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug fortran/71703] [4.9/5/6/7 Regression] ICE in wide_int_to_tree, at tree.c:1488
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71703

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug tree-optimization/71691] [6/7 Regression] wrong code at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu (Floating point exception)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71691

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71665] [4.9/5/6/7 Regression] ICE on invalid C++ code with non-integral constant enumerator value: in cxx_eval_constant_expression, at cp/constexpr.c:3918
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71665

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug bootstrap/71816] [7 Regression] bootstrap broken on armhf-linux-gnuabihf
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71816

Matthias Klose <doko at gcc dot gnu.org> changed:

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             Target|arm-linux-gnueabihf         |arm-linux-gnueabihf,
                   |                            |powerpc-linux-gnu

--- Comment #1 from Matthias Klose <doko at gcc dot gnu.org> ---
same on powerpc-linux-gnu

original build logs:

https://buildd.debian.org/status/fetch.php?pkg=gcc-snapshot&arch=armhf&ver=20160707-1&stamp=1467931534
https://buildd.debian.org/status/fetch.php?pkg=gcc-snapshot&arch=powerpc&ver=20160707-1&stamp=1467918813

https://launchpadlibrarian.net/271543215/buildlog_ubuntu-yakkety-powerpc.gcc-snapshot_20160707-1ubuntu1_BUILDING.txt.gz
https://launchpad.net/ubuntu/+source/gcc-snapshot/20160707-1ubuntu1/+build/10431592/+files/buildlog_ubuntu-yakkety-armhf.gcc-snapshot_20160707-1ubuntu1_BUILDING.txt.gz
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Subject: [Bug c++/71662] [4.9/5/6/7 Regression] ICE on invalid C++11 code with unqualified name look up: in tsubst_copy, at cp/pt.c:14010
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug libstdc++/71660] [5/6/7 regression] alignment of std::atomic<8 byte primitive type> (long long, double) is wrong on x86
Date: Fri, 08 Jul 2016 08:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71660

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug debug/71667] [7 Regression] ICE in as_a, at is-a.h:192 w/ -g -O2 -ftree-vectorize
Date: Fri, 08 Jul 2016 08:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71667

--- Comment #6 from alahay01 at gcc dot gnu.org ---
Author: alahay01
Date: Fri Jul  8 08:50:24 2016
New Revision: 238160

URL: https://gcc.gnu.org/viewcvs?rev=238160&root=gcc&view=rev
Log:
2016-07-08  Alan Hayward  <alan.hayward@arm.com>

gcc/
        PR tree-optimization/71667
        * tree-vect-loop.c (vectorizable_live_operation): ignore DEBUG stmts

testsuite/
        PR tree-optimization/71667
        * gcc.dg/vect/pr71667.c: New


Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr71667.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-loop.c
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Subject: [Bug ada/71817] New: gcc/ada/adaint.c: 2 * Suspicious condition
Date: Fri, 08 Jul 2016 08:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71817

            Bug ID: 71817
           Summary: gcc/ada/adaint.c: 2 * Suspicious condition
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ada
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

1.

trunk/gcc/ada/adaint.c:1927]: (style) Suspicious condition (assignment +
comparison); Clarify expression with parentheses.

Source code is

  if (fd = open (name, O_RDONLY, 0) < 0)
     return 0;

2.

trunk/gcc/ada/adaint.c:2000]: (style) Suspicious condition (assignment +
comparison); Clarify expression with parentheses.

Duplicate.
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Subject: [Bug middle-end/71654] [6/7 Regression] missing VRP optimization on c++ unsigned char and short expressions
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71654

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The regression is because in GCC 5 we shorten the (int) i <= 3 compare
early during FE folding while it survives as integer compare in GCC 6.
This makes (int) i redundant in the conditional block.
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Subject: [Bug middle-end/71654] [6/7 Regression] missing VRP optimization on c++ unsigned char and short expressions
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71638] [6/7 Regression] ICE on invalid C++ code on x86_64-linux-gnu with -Wall (internal compiler error: non-constant element in constant CONSTRUCTOR)
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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           Keywords|                            |ice-on-invalid-code
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Subject: [Bug c++/71630] [5/6/7 Regression] ICE on valid C++14 code with variable templates: in get, at cgraph.h:395
Date: Fri, 08 Jul 2016 09:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug ipa/71624] [6 regression][CHKP] internal compiler error: in duplicate_thunk_for_node
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Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2
      Known to work|                            |7.0
            Summary|[6/7 regression][CHKP]      |[6 regression][CHKP]
                   |internal compiler error: in |internal compiler error: in
                   |duplicate_thunk_for_node    |duplicate_thunk_for_node
      Known to fail|7.0                         |

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
fixed on trunk
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Subject: [Bug target/71607] [5/6/7 Regression] [ARM] ice due to forbidden enabled attribute dependency on instruction operands
Date: Fri, 08 Jul 2016 09:02:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug middle-end/71606] [4.9/5/6 Regression] ICE on -O2 and above on x86_64-linux-gnu (internal compiler error: in get_expr_operands, at tree-ssa-operands.c:882)
Date: Fri, 08 Jul 2016 09:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71606

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71604] [6/7 Regression] ICE on valid C++11 code with range-based for loop: in pop_binding, at cp/name-lookup.c:376
Date: Fri, 08 Jul 2016 09:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71604

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c/71602] [6/7 regression] ICE on __builtin_va_arg in build_va_arg, at c-family/c-common.c:5810
Date: Fri, 08 Jul 2016 09:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71602

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71577] [6/7 regression] ICE on invalid C++11 code (with extra struct initializer) on x86_64-linux-gnu: in digest_init_r, at cp/typeck2.c:1117
Date: Fri, 08 Jul 2016 09:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71577

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71576] [4.9/5/6/7 Regression] ICE on valid C++11 code (with xvalue and bitfield) on x86_64-linux-gnu: in build_target_expr, at cp/tree.c:385
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71576

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug tree-optimization/71575] [4.9/6/7 Regression] [graphite] internal compiler error: in copy_cond_phi_nodes, at graphite-isl-ast-to-gimple.c:2500
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71570] [6/7 regression] ICE on invalid variable capture in cxx_incomplete_type_diagnostic, at cp/typeck2.c:551
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71569] [5/6/7 regression] Crash: External definition of template member from template struct
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug tree-optimization/71563] [6/7 Regression] Regression in GCC-7.0.0's optimizer.
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71561] [5/6/7 Regression] ICE with -Wall on valid C++ code on x86_64-linux-gnu: in potential_constant_expression_1, at cp/constexpr.c:5249
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71561

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71515] [4.9/5/6/7 Regression] ICE on valid C++ code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Fri, 08 Jul 2016 09:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71515

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug tree-optimization/71518] [6 Regression] wrong code at -O3 on x86_64-linux-gnu in 64-bit mode (not in 32-bit mode)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71518

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Priority|P3                          |P2
      Known to work|                            |7.0
            Summary|[6/7 Regression] wrong code |[6 Regression] wrong code
                   |at -O3 on x86_64-linux-gnu  |at -O3 on x86_64-linux-gnu
                   |in 64-bit mode (not in      |in 64-bit mode (not in
                   |32-bit mode)                |32-bit mode)
      Known to fail|                            |6.1.0
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Subject: [Bug c++/71513] [6/7 Regression] ICE on valid C++11 code (with alignas specifier) on x86_64-linux-gnu: Segmentation fault
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71513

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71511] [6/7 Regression] ICE on valid C++11 code (with decltype) on x86_64-linux-gnu: in cxx_incomplete_type_diagnostic, at cp/typeck2.c:567
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71511

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug fortran/71745] upper array bound huge(i) on 32-bit systems
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71745

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
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             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-07-08
     Ever confirmed|0                           |1

--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (7.0).
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Subject: [Bug c/71812] gcc6/c++/functional:1726:40: internal compiler error: in assign_temp, at function.c:961
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71812

--- Comment #4 from Jeffrey Walton <noloader at gmail dot com> ---
(In reply to Richard Biener from comment #3)
> Duplicate of PR71811?

Yes, it looks like a duplicate.

GCC's bug tracker search feature absolutely sucks. Did Microsoft provide it
free of charge?
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Subject: [Bug bootstrap/71816] [7 Regression] bootstrap broken on armhf-linux-gnuabihf
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71816

ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |build
           Priority|P3                          |P1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-07-08
                 CC|                            |ktkachov at gcc dot gnu.org
   Target Milestone|---                         |7.0
     Ever confirmed|0                           |1

--- Comment #2 from ktkachov at gcc dot gnu.org ---
Confirmed on arm-none-linux-gnueabihf
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From: "alahay01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/71818] New: [7 Regression] ICE in as_a, at is-a.h:192 w/ -O2 -ftree-vectorize
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71818

            Bug ID: 71818
           Summary: [7 Regression] ICE in as_a, at is-a.h:192 w/ -O2
                    -ftree-vectorize
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: alahay01 at gcc dot gnu.org
  Target Milestone: ---

This bug is for the regression found by Qirun Zhang here:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71667#c4

Splitting out from PR 71667 because it is a different issue.

The bug is caused because one for the uses of the live statement is neither a
phi nor a debug statement.
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Subject: [Bug debug/71667] [7 Regression] ICE in as_a, at is-a.h:192 w/ -g -O2 -ftree-vectorize
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alahay01 at gcc dot gnu.org changed:

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             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from alahay01 at gcc dot gnu.org ---
Fixed.

Additional issue found by Qirun has been raised as PR 71818
>From gcc-bugs-return-530127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 09:26:08 2016
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Subject: [Bug c/71812] gcc6/c++/functional:1726:40: internal compiler error: in assign_temp, at function.c:961
Date: Fri, 08 Jul 2016 09:26:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I can't reproduce the ICE on x86_64-linux with the preprocessed source you've
provided.  That said, it could be dup of PR71210 which has been fixed 1.5
months ago.
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Subject: [Bug c/71812] gcc6/c++/functional:1726:40: internal compiler error: in assign_temp, at function.c:961
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--- Comment #6 from Jeffrey Walton <noloader at gmail dot com> ---
(In reply to Richard Biener from comment #3)
> Duplicate of PR71811?

My bad... That's the same bug report.

When attempting to include the preprocessed source file in the original report,
I kept getting "Gateway Timeout" errors. Apparently one of them got enough
processing to create the report before the error was reported.

Jelinek's potential dup at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=71210
appears to be the duplicate.
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--- Comment #4 from sulit <sulitsrc at 163 dot com> ---
ok
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Subject: [Bug tree-optimization/50417] regression: memcpy with known alignment
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npl at chello dot at changed:

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--- Comment #7 from npl at chello dot at ---
This seems to affect even the most trivial cases. I ran the following code witn
arm gcc 4.8.4, 4.9.2 and 5.3.0:

#include <stdint.h>
#include <string.h>

uint32_t foo_noalign(const uint32_t *s) {
        uint32_t v;
        memcpy(&v, s, sizeof(v));
        return v;
}

uint32_t foo(const uint32_t *s) {
        uint32_t v;
        memcpy(&v, __builtin_assume_aligned(s, 4), sizeof(v));
        return v;
}

Which generates the following code:

00000000 <foo_noalign>:
   0:   e92d4007        push    {r0, r1, r2, lr}
   4:   e3a02004        mov     r2, #4
   8:   e1a01000        mov     r1, r0
   c:   e08d0002        add     r0, sp, r2
  10:   ebfffffe        bl      0 <memcpy>
  14:   e59d0004        ldr     r0, [sp, #4]
  18:   e28dd00c        add     sp, sp, #12
  1c:   e49de004        pop     {lr}            ; (ldr lr, [sp], #4)
  20:   e12fff1e        bx      lr

00000024 <foo>:
  24:   e5900000        ldr     r0, [r0]
  28:   e12fff1e        bx      lr

Thats really, really bad. clang has no problems generating the optimal code.
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Subject: [Bug c++/71553] [6 regression]ICE in assign_temp, at function.c:961
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--- Comment #5 from dominik.strasser@onespin-solutions.com ---
Works after applying the patch in my non-reduced test case, too.

Thanks
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Subject: [Bug tree-optimization/71264] [4.9/5 Regression] ICE in convert_move
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Bingfeng Mei <bmei at broadcom dot com> changed:

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--- Comment #15 from Bingfeng Mei <bmei at broadcom dot com> ---
Hi, Richard, I updated to the latest patches. But our target still failed in
the same way as other people reported. footype gets V4QI instead of SI because
we have it supported in vector_mode_supported_p. Thus the following error.

 not vectorized: vector stmt in loop:temp_14 = VIEW_CONVERT_EXPR<footype>(_8);

I guess your patch in vect_init_vector is supposed to fix this. But the
execution doesn't even hit vect_init_vector.
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--- Comment #19 from Zdenek Sojka <zsojka at seznam dot cz> ---
Target milestone 4.9.4 is not set.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
   Target Milestone|---                         |4.9.4
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50417

--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 8 Jul 2016, npl at chello dot at wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50417
> 
> npl at chello dot at changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |npl at chello dot at
> 
> --- Comment #7 from npl at chello dot at ---
> This seems to affect even the most trivial cases. I ran the following code witn
> arm gcc 4.8.4, 4.9.2 and 5.3.0:
> 
> #include <stdint.h>
> #include <string.h>
> 
> uint32_t foo_noalign(const uint32_t *s) {
>         uint32_t v;
>         memcpy(&v, s, sizeof(v));
>         return v;
> }
> 
> uint32_t foo(const uint32_t *s) {
>         uint32_t v;
>         memcpy(&v, __builtin_assume_aligned(s, 4), sizeof(v));
>         return v;
> }
> 
> Which generates the following code:
> 
> 00000000 <foo_noalign>:
>    0:   e92d4007        push    {r0, r1, r2, lr}
>    4:   e3a02004        mov     r2, #4
>    8:   e1a01000        mov     r1, r0
>    c:   e08d0002        add     r0, sp, r2
>   10:   ebfffffe        bl      0 <memcpy>
>   14:   e59d0004        ldr     r0, [sp, #4]
>   18:   e28dd00c        add     sp, sp, #12
>   1c:   e49de004        pop     {lr}            ; (ldr lr, [sp], #4)
>   20:   e12fff1e        bx      lr
> 
> 00000024 <foo>:
>   24:   e5900000        ldr     r0, [r0]
>   28:   e12fff1e        bx      lr
> 
> Thats really, really bad. clang has no problems generating the optimal code.

But there is no good reasoning that can be applied that it is a valid
transform.  What does clang do when s is void * and you cast that to
uint32_t *?  Note that memcpy prototype takes a void * argument.
>From gcc-bugs-return-530136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 11:23:35 2016
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/71264] [4.9/5 Regression] ICE in convert_move
Date: Fri, 08 Jul 2016 11:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71264

--- Comment #16 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 8 Jul 2016, bmei at broadcom dot com wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71264
> 
> Bingfeng Mei <bmei at broadcom dot com> changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |bmei at broadcom dot com
> 
> --- Comment #15 from Bingfeng Mei <bmei at broadcom dot com> ---
> Hi, Richard, I updated to the latest patches. But our target still failed in
> the same way as other people reported. footype gets V4QI instead of SI because
> we have it supported in vector_mode_supported_p. Thus the following error.
> 
>  not vectorized: vector stmt in loop:temp_14 = VIEW_CONVERT_EXPR<footype>(_8);
> 
> I guess your patch in vect_init_vector is supposed to fix this. But the
> execution doesn't even hit vect_init_vector.

The patch wasn't supposed to make this case vectorized but fix the ICE.
On targets where the vector mode is not supported it happens to also
vectorize it.

Making the vectorizer deal with existing vector types is a much harder
task (I tried for a few hours but failed, there are too many rough
spots to fix)
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Subject: [Bug tree-optimization/71264] [4.9/5 Regression] ICE in convert_move
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71264

--- Comment #17 from Bingfeng Mei <bmei at broadcom dot com> ---
OK, I will skip the vectorization check on our port then. Thanks.
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Subject: [Bug middle-end/71473] [5/6/7 Regression] cilkplus sum reducer ICE
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Subject: [Bug c++/71350] [4.9/5/6/7 regression] ICE on trailing return type declaration with initializer list
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Subject: [Bug rtl-optimization/71374] [5/6/7 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu: in extract_constrain_insn, at recog.c:2190
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Subject: [Bug target/71294] [6/7 Regression] ICE in gen_add2_insn, at optabs.c:4442 on powerpc64le-linux
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Subject: [Bug c++/71290] [6/7 Regression] Flexible array member is not diagnosed with -pedantic
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Subject: [Bug c++/71274] [5/6/7 Regression] deprecated static const member of struct raises warning without use
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Subject: [Bug c++/71251] [5/6/7 regression] ICE on invalid code, with unusual template name
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Subject: [Bug c++/71236] [5/6/7 Regression] ICE on invalid code
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71166] [7 Regression] ICE with nested constexpr/initializer
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71166] [7 Regression] ICE with nested constexpr/initializer
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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      Known to work|                            |6.2.0
            Summary|[6/7 Regression] ICE with   |[7 Regression] ICE with
                   |nested                      |nested
                   |constexpr/initializer       |constexpr/initializer

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yes.  And we should have added a testcase.
>From gcc-bugs-return-530152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 11:42:56 2016
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Subject: [Bug c++/71164] [6/7 Regression] tree check fail at cp/pt.c:12961
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Subject: [Bug c++/71117] [6/7 Regression] Overeager application of conversion to function pointer during overload resolution of call to function object
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/71121] [6/7 Regression] Spurious warning: "the address of [...] will never be NULL [-Waddress]"
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c/71115] [4.9/5/6 Regression] Missing warning: excess elements in struct initializer
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug libstdc++/66145] [5/6/7 Regression] std::ios_base::failure objects thrown from libstdc++.so use old ABI
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Boris Kolpackov <boris at kolpackov dot net> changed:

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--- Comment #13 from Boris Kolpackov <boris at kolpackov dot net> ---
This is getting pretty bad since recent versions of most distributions
(Debian/Ubuntu, Fedora) now have _GLIBCXX_USE_CXX11_ABI set to 1 by default
while their libstdc++ still throws "old ABI" ios::failure.

This (i.e., the #define in functexcept.cc), BTW, is still in GCC 6.1.
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Subject: [Bug tree-optimization/71109] [6 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "maybe_record_trace_start"
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug fortran/71067] [4.9/5/6/7 Regression] ICE on data initialization with insufficient value
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Subject: [Bug c++/71092] [6/7 Regression] ICE: in cxx_eval_call_expression, at cp/constexpr.c:1449; only with -Os
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/70977] [6/7 Regression] Out of memory during compilation of facebook/wangle (flag c++0x works, flag c++14 fails).
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug tree-optimization/50417] regression: memcpy with known alignment
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--- Comment #9 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #8)
> 
> But there is no good reasoning that can be applied that it is a valid
> transform.  What does clang do when s is void * and you cast that to
> uint32_t *?  Note that memcpy prototype takes a void * argument.

Does it matter whether there's a void* in between or not?

If we do a *(int32_T*)(void*)(int32_t*)p on a strict alignment target, it will
result in a 32 bit mem access.

GCC knows memcpy and its semantics well enough so propagating the target's
alignment rules into memcpy is most likely going to be a safe and sane thing to
do.  So at least cases like 

void test (const int* a, int* b)
{
  std::memcpy (b, a, 4);
}

should work.  Shouldn't it?
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Subject: [Bug c++/70869] [6 Regression] internal compiler error: Segmentation fault on array of pointer to function members
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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      Known to work|                            |7.0
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                   |compiler error:             |compiler error:
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                   |of pointer to function      |of pointer to function
                   |members                     |members
      Known to fail|7.0                         |
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Subject: [Bug libstdc++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
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Subject: [Bug c++/70781] [6/7 Regression] ICE on invalid C++ code with lambda expressions on x86_64-linux-gnu in finish_expr_stmt, at cp/semantics.c:677
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Subject: [Bug c++/70824] [6/7 Regression] cc1plus consumes all available memory on specific template code
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Subject: [Bug libstdc++/53429] libstdc++ should guarantee not to expose complex::{imag,real} so it supports both C++98 and C++11
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Jonathan Wakely <redi at gcc dot gnu.org> changed:

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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jeffrey Yasskin from comment #3)
> Richard, I'm not asking that it be possible to link together code compiled
> in C++98 and C++11 mode. I'm asking that gcc be able to build in C++11 mode
> at all.

Even if we build GCC in C++11 (or C++14) mode, some pieces of libstdc++ get
built with -std=gnu++98 explicitly. That's why they're in the
libstdc++-v3/src/c++98 directory.

> If libstdc++.so exposed the c++98 version of complex::real(), then
> all C++11 programs that used complex would be potentially broken.

I don't think this is true now, because those functions are abi-tagged for
C++11 and later, so C++11 programs would not use the symbols exported from the
library (assuming such symbols existed, and if they did the check-abi testsuite
target would fail for our primary targets, so we'd notice and it wouldn't just
happen silently due to bad luck and different inlining decisions).

So I think this was fixed for 4.8.0 by r193445, but please reopen if I'm
missing something and a potential problem still exists.

> Another way to fix this would, of course, be to either expose a
> configuration option to build libstdc++.so in C++11 mode or to install two
> different .so files in parallel, but doing that seems unnecessarily hostile
> to users when it would be pretty easy to guarantee that the one .so works
> for both versions of the language.

We definitely don't want two libs.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50417

--- Comment #10 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 8 Jul 2016, olegendo at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50417
> 
> --- Comment #9 from Oleg Endo <olegendo at gcc dot gnu.org> ---
> (In reply to rguenther@suse.de from comment #8)
> > 
> > But there is no good reasoning that can be applied that it is a valid
> > transform.  What does clang do when s is void * and you cast that to
> > uint32_t *?  Note that memcpy prototype takes a void * argument.
> 
> Does it matter whether there's a void* in between or not?
> 
> If we do a *(int32_T*)(void*)(int32_t*)p on a strict alignment target, it will
> result in a 32 bit mem access.

No, changing the pointer type doesn't change the access - how the access
is implemented depends on memcpy.

> GCC knows memcpy and its semantics well enough so propagating the target's
> alignment rules into memcpy is most likely going to be a safe and sane thing to
> do.  So at least cases like 
> 
> void test (const int* a, int* b)
> {
>   std::memcpy (b, a, 4);
> }
> 
> should work.  Shouldn't it?

What makes the parameter type special?  Would

void test (const int *a, int *b)
{
  std::memcpy ((char *)b, (char *)a, t);
}

be invalid to optimize to an aligned copy in your eyes?

Yes, I know that C standard rule about pointer type casting, 6.3.2.3/7
in C11, but I guess that if we'd start to derive alignment from
this undefinedness we are going to break a lot of code.  To GCC
what matters is actual accesses, not just pointer conversions
which are all stripped anyway which makes the following testcase
not optimizable (easily)

void test (const char *a, char *b)                                              
{                                                                               
  std::memcpy ((int *)b, (int *)a, 4);                                        
}
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed also on x86_64 IIRC.
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--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
Is this fixed on trunk?
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--- Comment #28 from Richard Biener <rguenth at gcc dot gnu.org> ---
For GCC 6 we now have a DCE right before RTL expansion so what's the status of
this bug for GCC6/7?
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50417

--- Comment #11 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #10)
> 
> What makes the parameter type special?  Would
> 
> void test (const int *a, int *b)
> {
>   std::memcpy ((char *)b, (char *)a, t);
> }
> 
> be invalid to optimize to an aligned copy in your eyes?

I think it's perfectly valid to optimize this case.  It could as well be
something like:

void test (const int *a, int *b)
{
  a[100] = 1;
  b[200] = 2;

  std::memcpy ((char *)b, (char *)a, t);
}

where a[100] and b[200] both would result in 32 bit accesses, not 4x1 byte or
something, because the base pointer is assumed to be int aligned.  Why should
memcpy be any different?
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50417

--- Comment #12 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 8 Jul 2016, olegendo at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50417
> 
> --- Comment #11 from Oleg Endo <olegendo at gcc dot gnu.org> ---
> (In reply to rguenther@suse.de from comment #10)
> > 
> > What makes the parameter type special?  Would
> > 
> > void test (const int *a, int *b)
> > {
> >   std::memcpy ((char *)b, (char *)a, t);
> > }
> > 
> > be invalid to optimize to an aligned copy in your eyes?
> 
> I think it's perfectly valid to optimize this case.  It could as well be
> something like:
> 
> void test (const int *a, int *b)
> {
>   a[100] = 1;
>   b[200] = 2;
> 
>   std::memcpy ((char *)b, (char *)a, t);
> }
> 
> where a[100] and b[200] both would result in 32 bit accesses, not 4x1 byte or
> something, because the base pointer is assumed to be int aligned.

No, because the access is performed as 'int'.

>  Why should memcpy be any different?

Because the memcpy stmt doesn't constitute a memory access but a function call.
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--- Comment #13 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #12)
> 
> No, because the access is performed as 'int'.

> 
> >  Why should memcpy be any different?
> 
> Because the memcpy stmt doesn't constitute a memory access but a function
> call.

Yeah, that might be how things are handled internally.  But that doesn't mean
the optimization in question can't / shouldn't be done.  GCC does even more
"evil" things with function calls such as replacing printf with puts,
propagating arguments into functions, inlining...  So ... uhm ... I'm afraid I
don't get the point.
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Subject: [Bug fortran/71730] [5/6/7 Regression] ICE when character length specification uses an undefined variable
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71730

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |4.9.3
           Keywords|                            |ice-on-invalid-code
   Last reconfirmed|                            |2016-07-08
     Ever confirmed|0                           |1
            Summary|ICE when character length   |[5/6/7 Regression] ICE when
                   |specification uses an       |character length
                   |undefined variable          |specification uses an
                   |                            |undefined variable
      Known to fail|                            |5.4.0, 6.1.0, 7.0

--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Likely caused by revision r229287 (pr67805). This is fixed by the patch in
comment 1, but array_constructor_2[67].f03 need to be updated and
bounds_check_strlen_2.f90 is failing.
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--- Comment #1 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Interesting.  How do we enable/disable code hoisting?  I don't see a documented
option for this.
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--- Comment #14 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 8 Jul 2016, olegendo at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50417
> 
> --- Comment #13 from Oleg Endo <olegendo at gcc dot gnu.org> ---
> (In reply to rguenther@suse.de from comment #12)
> > 
> > No, because the access is performed as 'int'.
> 
> > 
> > >  Why should memcpy be any different?
> > 
> > Because the memcpy stmt doesn't constitute a memory access but a function
> > call.
> 
> Yeah, that might be how things are handled internally.  But that doesn't mean
> the optimization in question can't / shouldn't be done.  GCC does even more
> "evil" things with function calls such as replacing printf with puts,
> propagating arguments into functions, inlining...  So ... uhm ... I'm afraid I
> don't get the point.

The point is the only reason you can do the optimization (on all targets)
is that C standard rule about pointer types (casting).

GCCs implementation details will make the application of the optimization
quite unreliable as well.

I've repeatedly said that I think relying on that part of the C standard
with respect to undefinedness would be a bad thing from a QOI perspective.
But I've changed my mind in the past - does -fsanitize=alignment
instrument pointer types/casts?
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--- Comment #2 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 8 Jul 2016, wschmidt at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71815
> 
> --- Comment #1 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
> Interesting.  How do we enable/disable code hoisting?  I don't see a documented
> option for this.

It's not yet committed.  You can try the patch at
https://gcc.gnu.org/ml/gcc-patches/2016-07/msg00360.html
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--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Doesn't sanitize anything for

int main()                                                                      
{                                                                               
  int i, j;                                                                     
  memcpy (&i, (int *)((char *)&i + 1), 4);                                      
  return 0;                                                                     
}

but note that the cast to (int *) is already removed during early folding
and you end up with GENERIC

  memcpy ((void *) &i, (const void *) (&i + 1), 4);
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71815

--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
OK.  I'm busy wrapping up some things before a vacation, but I'll plan to look
into this when I get back.
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Subject: [Bug tree-optimization/71802] [7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in expand_LOOP_VECTORIZED
Date: Fri, 08 Jul 2016 13:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71802

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
if-conversion builds

  _51 = LOOP_VECTORIZED (3, 4);

but

new phi replacement stmt
prephitmp_63 = prephitmp_62 != 0 ? _3 : prephitmp_62;
Degenerate phi!
prephitmp_52 = PHI <3(6)>
Degenerate phi!
prephitmp_54 = PHI <prephitmp_63(6)>
Applying pattern match.pd:865, generic-match.c:429
Removing basic block 5
basic block 5, loop depth 1
 pred:
 succ:


Removing basic block 6
basic block 6, loop depth 1
 pred:
 succ:


Merging blocks 17 and 11
Merging blocks 4 and 24
Merging blocks 21 and 22
gimple_simplified to if (1 != 0)
Applying pattern match.pd:853, gimple-match.c:164
Applying pattern match.pd:2618, gimple-match.c:57412
Removing basic block 23
basic block 23, loop depth 1
 pred:       21
goto <bb 19>;
 succ:       19


fix_loop_structure: fixing up loops for function
fix_loop_structure: removing loop 4


so there is no loop 4 in the end ...


Before if-conversion the IL has

  <bb 11>:
  # prephitmp_52 = PHI <3(6)>
  # prephitmp_54 = PHI <prephitmp_63(6)>
  if (prephitmp_52 != 0)

which likely messes things up.  copyprop leaves us with this unpropagated
constant by means of stmt folding during SSA substitution phase.


We are generally not fixing up a LOOP_VECTORIZED call when loops vanish
as we assume that doesn't happen between if-conversion and vectorization.
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Subject: [Bug bootstrap/71816] [7 Regression] bootstrap broken on armhf-linux-gnuabihf
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71816

Rainer Orth <ro at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|arm-linux-gnueabihf,        |arm-linux-gnueabihf,
                   |powerpc-linux-gnu           |powerpc-linux-gnu,
                   |                            |sparc-sun-solaris2.*
                 CC|                            |ro at gcc dot gnu.org

--- Comment #3 from Rainer Orth <ro at gcc dot gnu.org> ---
Same on Solaris/SPARC.
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Subject: [Bug libstdc++/66145] [5/6/7 Regression] std::ios_base::failure objects thrown from libstdc++.so use old ABI
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66145

--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, and I'm still planning to fix it.

(And I still think using exceptions in iostreams is dumb in the first place).
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Subject: [Bug tree-optimization/50417] regression: memcpy with known alignment
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50417

--- Comment #16 from npl at chello dot at ---
rguenther: Funny enough, I am using memcpy because thats the only standard
conform way to move data around that might be aliased. And I use this often to
parse binary streams from a network.

I think you are missing some key points, first that gcc readily replaces
functions it knows - which can be disabled at will. On x86, for all those
samples the call WILL BE replaced. (And in C++, RVO is explicitly allowed for
example)
So its pointless to discuss whether or not gcc should provide builtins (atleast
in the context of this bug). Instead talk about the replacing feature that
seems to work inconsistent / suboptimal.


One more sample to demonstrate this (all compiled with O2):

#include <string.h>
int foo_ptr(const int *s)
{
        /* nope */
        int v;
        memcpy(&v, s, sizeof(v));
        return v;
}

int foo_ref(const int &s)
{
        /* nope */
        int v;
        memcpy(&v, &s, sizeof(v));
        return v;
}

int foo_refloc(const int &s)
{
        /* This actually works */
        int b = s;
        int v;
        memcpy(&v, &b, sizeof(v));
        return v;
}

int foo_badalias(const char *s)
{
        /* Nope, but then THIS shouldnt be be replaced by a aligned load */
        int v;
        memcpy(&v, (int *)s, sizeof(v));
        return v;
}

int foo_badalias2(const char *s)
{
        /* That works, but is undefined behaviour (casting from a pointer with
less alignment)! */
        int v = *(int *)s;
        return v;
}
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Subject: [Bug target/71806] PowerPC -mcpu=power9 enables __float128 without an explicit -mfloat128
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--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri Jul  8 14:49:37 2016
New Revision: 238164

URL: https://gcc.gnu.org/viewcvs?rev=238164&root=gcc&view=rev
Log:
[gcc]
2016-07-08  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/71806
        * config/rs6000/rs6000-cpus.def (ISA_3_0_MASKS_SERVER): Do not
        enable -mfloat128-hardware by default.
        (ISA_3_0_MASKS_IEEE): New macro to give all of the VSX options
        that IEEE 128-bit hardware support needs.
        * config/rs6000/rs6000.c (rs6000_option_override_internal): If
        -mcpu=power9 -mfloat128, enable -mfloat128-hardware by default.
        Use ISA_3_0_MASKS_IEEE as the set of options that IEEE 128-bit
        floating point requires.
        * doc/invoke.texi (RS/6000 and PowerPC Options): Document
        -mfloat128 and -mfloat128-hardware changes.

[gcc/testsuite]
2016-07-08  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/71806
        * gcc.target/powerpc/p9-lxvx-stxvx-3.c: Add -mfloat128 option.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000-cpus.def
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/powerpc/p9-lxvx-stxvx-3.c
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Subject: [Bug target/71806] PowerPC -mcpu=power9 enables __float128 without an explicit -mfloat128
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--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri Jul  8 14:51:44 2016
New Revision: 238165

URL: https://gcc.gnu.org/viewcvs?rev=238165&root=gcc&view=rev
Log:
Back port from trunk

[gcc]
2016-07-08  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/71806
        * config/rs6000/rs6000-cpus.def (ISA_3_0_MASKS_SERVER): Do not
        enable -mfloat128-hardware by default.
        (ISA_3_0_MASKS_IEEE): New macro to give all of the VSX options
        that IEEE 128-bit hardware support needs.
        * config/rs6000/rs6000.c (rs6000_option_override_internal): If
        -mcpu=power9 -mfloat128, enable -mfloat128-hardware by default.
        Use ISA_3_0_MASKS_IEEE as the set of options that IEEE 128-bit
        floating point requires.
        * doc/invoke.texi (RS/6000 and PowerPC Options): Document
        -mfloat128 and -mfloat128-hardware changes.

[gcc/testsuite]
2016-07-08  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/71806
        * gcc.target/powerpc/p9-lxvx-stxvx-3.c: Add -mfloat128 option.


Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/config/rs6000/rs6000-cpus.def
    branches/gcc-6-branch/gcc/config/rs6000/rs6000.c
    branches/gcc-6-branch/gcc/doc/invoke.texi
    branches/gcc-6-branch/gcc/testsuite/ChangeLog
    branches/gcc-6-branch/gcc/testsuite/gcc.target/powerpc/p9-lxvx-stxvx-3.c
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Michael Meissner <meissner at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Michael Meissner <meissner at gcc dot gnu.org> ---
Closed.
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Subject: [Bug target/71806] PowerPC -mcpu=power9 enables __float128 without an explicit -mfloat128
Date: Fri, 08 Jul 2016 14:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71806

--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> ---
Fixed on trunk, subversion id 238161.  Fixed on GCC 6.2 branch, subversion id
238165.
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Subject: [Bug debug/71667] [7 Regression] ICE in as_a, at is-a.h:192 w/ -g -O2 -ftree-vectorize
Date: Fri, 08 Jul 2016 15:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71667

--- Comment #8 from Qirun Zhang <helloqirun at gmail dot com> ---
(In reply to alahay01 from comment #7)
> Fixed.
> 
> Additional issue found by Qirun has been raised as PR 71818

Hi Alan, Sorry that I missed your previous message..
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Subject: [Bug bootstrap/71819] New: [7 regression] Bootstrap fail on S/390 32 bit starting with r238078
Date: Fri, 08 Jul 2016 15:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71819

            Bug ID: 71819
           Summary: [7 regression] Bootstrap fail on S/390 32 bit starting
                    with r238078
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: krebbel at gcc dot gnu.org
  Target Milestone: ---

Reghunt found that this failed occurred first after r238078

There appear to be two errors in the build output:

/home/andreas/bisect/build/./prev-gcc/xg++
-B/home/andreas/bisect/build/./prev-gcc/
-B/home/andreas/bisect/gcc-238078-install/s390-ibm-linux-gnu/bin/ -nostdinc++
-B/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/src/.libs
-B/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/libsupc++/.libs

-I/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/include/s390-ibm-linux-gnu
 -I/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/include 
-I/home/andreas/gcc/libstdc++-v3/libsupc++
-L/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/src/.libs
-L/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/libsupc++/.libs
-c   -g -O2 -gtoggle -DIN_GCC     -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common
 -DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -I. -Ibuild
-I/home/andreas/bisect/../gcc/gcc -I/home/andreas/bisect/../gcc/gcc/build
-I/home/andreas/bisect/../gcc/gcc/../include 
-I/home/andreas/bisect/../gcc/gcc/../libcpp/include  \
        -o build/gencodes.o /home/andreas/bisect/../gcc/gcc/gencodes.c
/home/andreas/bisect/../gcc/gcc/genattrtab.c: In function 'rtx_def*
simplify_and_tree(rtx, rtx_def**, int, int)':
/home/andreas/bisect/../gcc/gcc/genattrtab.c:2131:1: error: non-trivial
conversion at assignment
 simplify_and_tree (rtx exp, rtx *pterm, int insn_code, int insn_index)
 ^~~~~~~~~~~~~~~~~
struct rtx_def *
int
# VUSE <.MEM_49>
pretmp_132 = MEM[(union u *)exp_106 + 8B];
/home/andreas/bisect/../gcc/gcc/genattrtab.c:2131:1: error: non-trivial
conversion at assignment
struct rtx_def *
int
# VUSE <.MEM_49>
pretmp_141 = MEM[(union u *)_16 + 8B];

....

/home/andreas/bisect/build/./prev-gcc/xg++
-B/home/andreas/bisect/build/./prev-gcc/
-B/home/andreas/bisect/gcc-238078-install/s390-ibm-linux-gnu/bin/ -nostdinc++
-B/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/src/.libs
-B/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/libsupc++/.libs

-I/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/include/s390-ibm-linux-gnu
 -I/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/include 
-I/home/andreas/gcc/libstdc++-v3/libsupc++
-L/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/src/.libs
-L/home/andreas/bisect/build/prev-s390-ibm-linux-gnu/libstdc++-v3/libsupc++/.libs
-c   -g -O2 -gtoggle -DIN_GCC     -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common
 -DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -I. -Ibuild
-I/home/andreas/bisect/../gcc/gcc -I/home/andreas/bisect/../gcc/gcc/build
-I/home/andreas/bisect/../gcc/gcc/../include 
-I/home/andreas/bisect/../gcc/gcc/../libcpp/include  \
        -o build/gencheck.o /home/andreas/bisect/../gcc/gcc/gencheck.c
0x11538b3 verify_gimple_in_cfg(function*, bool)
        /home/andreas/bisect/../gcc/gcc/tree-cfg.c:5212
0xfbb427 execute_function_todo
        /home/andreas/bisect/../gcc/gcc/passes.c:1964
0xfba2b3 do_per_function
        /home/andreas/bisect/../gcc/gcc/passes.c:1648
0xfbb677 execute_todo
        /home/andreas/bisect/../gcc/gcc/passes.c:2016
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[3]: *** [build/genattrtab.o] Error 1
make[3]: *** Waiting for unfinished jobs....
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Subject: [Bug target/71297] [7 regression] ICE on invalid code in altivec_resolve_overloaded_builtin (rs6000-c.c:5106) on powerpc64le-linux
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71297

--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Fri Jul  8 15:42:47 2016
New Revision: 238168

URL: https://gcc.gnu.org/viewcvs?rev=238168&root=gcc&view=rev
Log:
[gcc]

2016-07-08  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        PR target/71297
        * config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
        Allow standard error handling to take over when a wrong number
        of arguments is presented to __builtin_vec_ld () or
        __builtin_vec_st ().

[gcc/testsuite]

2016-07-08  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

        PR target/71297
        * gcc.target/powerpc/pr71297.c: New.


Added:
    trunk/gcc/testsuite/gcc.target/powerpc/pr71297.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000-c.c
    trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/71297] [7 regression] ICE on invalid code in altivec_resolve_overloaded_builtin (rs6000-c.c:5106) on powerpc64le-linux
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71297

Bill Schmidt <wschmidt at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug bootstrap/71816] [7 Regression] bootstrap broken on armhf-linux-gnuabihf
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ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |krebbel at gcc dot gnu.org

--- Comment #4 from ktkachov at gcc dot gnu.org ---
*** Bug 71819 has been marked as a duplicate of this bug. ***
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Subject: [Bug bootstrap/71819] [7 regression] Bootstrap fail on S/390 32 bit starting with r238078
Date: Fri, 08 Jul 2016 15:46:00 -0000
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ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |ktkachov at gcc dot gnu.org
         Resolution|---                         |DUPLICATE

--- Comment #1 from ktkachov at gcc dot gnu.org ---
Dup.

*** This bug has been marked as a duplicate of bug 71816 ***
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/71816] [7 Regression] bootstrap broken on multiple targets
Date: Fri, 08 Jul 2016 15:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71816

ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|arm-linux-gnueabihf,        |arm-linux-gnueabihf,
                   |powerpc-linux-gnu,          |powerpc-linux-gnu,
                   |sparc-sun-solaris2.*,       |sparc-sun-solaris2.*,
                   |powerpc-ibm-aix*            |powerpc-ibm-aix*, s390
                 CC|                            |rguenth at gcc dot gnu.org
            Summary|[7 Regression] bootstrap    |[7 Regression] bootstrap
                   |broken on                   |broken on multiple targets
                   |armhf-linux-gnuabihf        |

--- Comment #5 from ktkachov at gcc dot gnu.org ---
Seems to have started with r238078
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Subject: [Bug bootstrap/71816] [7 Regression] bootstrap broken on multiple targets
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--- Comment #6 from David Edelsohn <dje at gcc dot gnu.org> ---
Bootstrap is proceeding with r238077.
>From gcc-bugs-return-530206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 16:26:33 2016
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Subject: [Bug fortran/71770] gfortran: internal compiler error: Segmentation fault (program f951)
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2016-07-08
     Ever confirmed|0                           |1

--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Did you read the initial error message and follow 
> the direction?  This parts seems very important
> (and you're possibly wasting gfortran maintainer's
> time).

Without answer the PR will be closed as INVALID.
>From gcc-bugs-return-530207-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 16:30:36 2016
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Subject: [Bug fortran/71799] [7 Regression] ICE in DO loop code emission (gfc_resolve_iterator)
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-07-08
     Ever confirmed|0                           |1

--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Internal error from 4.8 up to trunk (7.0).
>From gcc-bugs-return-530208-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 17:17:39 2016
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Subject: [Bug c++/71811] gcc6/c++/functional:1726:40: internal compiler error: in assign_temp, at function.c:961
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--- Comment #2 from Jeffrey Walton <noloader at gmail dot com> ---
Also see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=71210 (thanks JJ).
>From gcc-bugs-return-530209-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 19:57:58 2016
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Subject: [Bug c++/71784] [6/7 Regression] ICE on invalid code in push_access_scope, at cp/pt.c:229
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--- Comment #8 from Ela <mct_ancs at yahoo dot com> ---
(In reply to Martin LiÅ¡ka from comment #7)

> Same as the origin, it's obviously an invalid code.

  Tested on all Clang-3.8 C++11,14,17 - it works.

  gcc-6.1.0 is a bit more explicit in some sense:
   - class instantiation w/ external leaves all
     members non-inst.
   - the missing function in the call (in main() )
     is written as some mangle, and not in_clear
     (as it would be with other functions - that
     one can add for test)
   - thus seems as a lack of internal repres. or
     something.

  Else please enlighten me on the correct syntax.
>From gcc-bugs-return-530210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 20:04:59 2016
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Subject: [Bug c++/71784] [6/7 Regression] ICE on invalid code in push_access_scope, at cp/pt.c:229
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--- Comment #9 from Ela <mct_ancs at yahoo dot com> ---
(In reply to Ela from comment #8)
> (In reply to Martin LiÅ¡ka from comment #7)
> 
> > Same as the origin, it's obviously an invalid code.
> 
>   Tested on all Clang-3.8 C++11,14,17 - it works.
> 
>   gcc-6.1.0 is a bit more explicit in some sense:
>    - class instantiation w/ external leaves all
>      members non-inst.
>    - the missing function in the call (in main() )
>      is written as some mangle, and not in_clear
>      (as it would be with other functions - that
>      one can add for test)
>    - thus seems as a lack of internal repres. or
>      something.
> 
>   Else please enlighten me on the correct syntax.


 ... actually I made it simpler, in order to get to
 the root of it:

 --------------------------------------------------
#include <iostream>
using std::cout;


template<typename T>
class A{
  public:
  template<typename U>
  void f(U const&)  & ;
  template<typename U>
  void f(U const&) && ;
};


  template<typename T>
  template<typename U>
   void A<T>::f(U const& x)  & { std::cout << "lvalue object\n" ; }
  template<typename T>
  template<typename U>
   void A<T>::f(U const& x) && { std::cout << "rvalue object\n" ; }

template class A<int> ;
template void A<int>::f<int>(int const&) & ;
template void A<float>::f<int>(int const&) &&;


int main(){

  A<int>   a    ;
           a.f<int>(2);  
  A<float>().f<int>(1); 

}
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Subject: [Bug c++/71784] [6/7 Regression] ICE on invalid code in push_access_scope, at cp/pt.c:229
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--- Comment #10 from Ela <mct_ancs at yahoo dot com> ---

>  ... actually I made it simpler, in order to get to
>  the root of it:
> 
>  ---------------  CORRECTION  ---------------------
#include <iostream>
using std::cout;


#include <iostream>

template<typename T>
class A{
  public:
  void f()  & ;
  void f() && ;
  void g()  ;
  void g(int)  ;
};
>  ---------------------------------------------------
#include "e.hh"

  template<typename T>
   void A<T>::f()  & { std::cout << "lvalue object\n" ; }
  template<typename T>
   void A<T>::f() && { std::cout << "rvalue object\n" ; }

  template<typename T>
   void A<T>::g()   { std::cout << "lvalue object\n" ; }
  template<typename T>
   void A<T>::g(int x)  { std::cout << "rvalue object\n" ; }

extern template class A<int> ;
//extern template class A<float> ;
//template void  A<int>::f(float const&)  & ;
//template void  A<int>::f<int>() && ;

template  void A<int>::f() &;
//template void  A<float>::f() && ;


template  void A<int>::g() ;
template  void A<int>::g(int) ;
>  ---------------------------------------------------
#include <iostream>
#include "e.hh"
using std::cout;


int main(){

  A<int>   a    ;
           a.f(); // lvalue
//  A<float>().f(); // rvalue
           a.g(); // lvalue
           a.g(3); // lvalue
}
>  ---------------------------------------------------
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71606

--- Comment #5 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Jul  8 20:20:23 2016
New Revision: 238172

URL: https://gcc.gnu.org/viewcvs?rev=238172&root=gcc&view=rev
Log:
Do not consider COMPLEX_TYPE as fold_convertible_p

        Backported from mainline
        2016-07-08  Martin Liska  <mliska@suse.cz>

        PR middle-end/71606
        * fold-const.c (fold_convertible_p): As COMPLEX_TYPE
        folding produces SAVE_EXPRs, thus return false for the type.
        Backported from mainline
        2016-07-08  Martin Liska  <mliska@suse.cz>

        * gcc.dg/torture/pr71606.c: New test.

Added:
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr71606.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/fold-const.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/71606] [4.9/5/6 Regression] ICE on -O2 and above on x86_64-linux-gnu (internal compiler error: in get_expr_operands, at tree-ssa-operands.c:882)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71606

--- Comment #6 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Jul  8 20:21:02 2016
New Revision: 238173

URL: https://gcc.gnu.org/viewcvs?rev=238173&root=gcc&view=rev
Log:
Do not consider COMPLEX_TYPE as fold_convertible_p

        Backported from mainline
        2016-07-08  Martin Liska  <mliska@suse.cz>

        PR middle-end/71606
        * fold-const.c (fold_convertible_p): As COMPLEX_TYPE
        folding produces SAVE_EXPRs, thus return false for the type.
        Backported from mainline
        2016-07-08  Martin Liska  <mliska@suse.cz>

        * gcc.dg/torture/pr71606.c: New test.

Added:
    branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr71606.c
Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/fold-const.c
    branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/71606] [4.9/5/6 Regression] ICE on -O2 and above on x86_64-linux-gnu (internal compiler error: in get_expr_operands, at tree-ssa-operands.c:882)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71606

--- Comment #7 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Jul  8 20:22:22 2016
New Revision: 238174

URL: https://gcc.gnu.org/viewcvs?rev=238174&root=gcc&view=rev
Log:
Do not consider COMPLEX_TYPE as fold_convertible_p

        Backported from mainline
        2016-07-08  Martin Liska  <mliska@suse.cz>

        PR middle-end/71606
        * fold-const.c (fold_convertible_p): As COMPLEX_TYPE
        folding produces SAVE_EXPRs, thus return false for the type.
        Backported from mainline
        2016-07-08  Martin Liska  <mliska@suse.cz>

        * gcc.dg/torture/pr71606.c: New test.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/torture/pr71606.c
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/fold-const.c
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/71606] ICE on -O2 and above on x86_64-linux-gnu (internal compiler error: in get_expr_operands, at tree-ssa-operands.c:882)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71606

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
            Summary|[4.9/5/6 Regression] ICE on |ICE on -O2 and above on
                   |-O2 and above on            |x86_64-linux-gnu (internal
                   |x86_64-linux-gnu (internal  |compiler error: in
                   |compiler error: in          |get_expr_operands, at
                   |get_expr_operands, at       |tree-ssa-operands.c:882)
                   |tree-ssa-operands.c:882)    |

--- Comment #8 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Fixed on all active branches.
>From gcc-bugs-return-530216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 20:29:58 2016
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Subject: [Bug rtl-optimization/71621] [7 Regression] ICE in assign_by_spills, at lra-assigns.c:1417 (error: unable to find a register to spill) w/ -O2 -mavx2 -ftree-vectorize
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71621

--- Comment #4 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Fri Jul  8 20:29:12 2016
New Revision: 238178

URL: https://gcc.gnu.org/viewcvs?rev=238178&root=gcc&view=rev
Log:
2016-07-08  Vladimir Makarov  <vmakarov@redhat.com>

        PR rtl-optimization/71621
        * lra-constraints.c (process_alt_operands): Check combination of
        reg class and mode.

2016-07-08  Vladimir Makarov  <vmakarov@redhat.com>

        PR rtl-optimization/71621
        * gcc.target/i386/pr71621-1.c: New.
        * gcc.target/i386/pr71621-2.c: New.


Added:
    trunk/gcc/testsuite/gcc.target/i386/pr71621-1.c
    trunk/gcc/testsuite/gcc.target/i386/pr71621-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/lra-constraints.c
    trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/50417] regression: memcpy with known alignment
Date: Fri, 08 Jul 2016 21:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50417

--- Comment #17 from npl at chello dot at ---
I got interrupted by a colleague at work, part 2 of the ramblings...

Everything you could argue against memcpy beeing replaced by simpler
instructions, doesnt change that the same issue persists with the
__builtin_memcpy function, which is explicitely saying you want the
optimizations.

A pointer to a uint32 can be assumed to be proper aligned, CREATING such a
pointer thats not aligned is already undefined behaviour by the standard (the
compiler could zero out bits for example). I dont think that what happens
afterwards with something that shouldn`t exist in the first place is an
argument against optimizing proper code.

Further, I lack a consistent way of dealing with potential aliasing pointers.
Using memcpy seems the sanest way, simply because its standards compliant,
supported everywhere and your code wont mysteriously break once you use LTO or
higher optimization settings.
Compilers can reliably detect this and replace memcpy since years (ignoring
this issue, which I would consider a bug), so there is no draw back. Its a
feature common pretty much everywhere, and a valid recommendation in many
discussions related to the topic.

Consider the example below for illustration, FIXEDMEMCPY is how the plain
memcpy should work and already does work for archs with unaligned access.
(I had planned to post the code for 32bit x86, but the assembly is rather ugly,
amd64 would work with "unsigned long" and "unsigned long long").

I already ran in such issues, when different software components define their
own fixedwidth types. Its a practical issue where pointing to paragraphs of the
standard dont help, unless you provide a proper solution with it. The
FIXEDMEMCPY hack is fine for gcc but compilerspecific.

In short:
* Optimizing memcpy to simple instructions is a reality and expected, the
behaviour (slow code) on arm (and other archs with req. alignment) is a
unwelcome oddity
* memcpy is one of the few ways to deal with aliasing, and the most standards
compliant. (theres unions too, but thats not standards compliant)
* I dont see a problem in replacing standard functions (and __builtin_memcpy
has the same issue)
* I dont see a problem in expecting a correctly aligned pointer, and doing
undefined behaviour if the pointer could cause undefined behaviour.



typedef unsigned uint32_t;
typedef unsigned long uint32_alt;
_Static_assert(sizeof(uint32_t) == sizeof(uint32_alt), "you picked a bad
architecture or typedefs for this example");

#define FIXEDMEMCPY(a, b, s) __builtin_memcpy(__builtin_assume_aligned(a,
__alignof__(*a)), __builtin_assume_aligned(b, __alignof__(*b)), s)
unsigned breakme(uint32_t *ptr, uint32_alt *ptr2, uint32_t a)
{
        /* normally in different compilation units, but LTO doesnt care */
        *ptr = 0;
        *ptr2 = a;
        return *ptr;
}

unsigned fixme(uint32_t *ptr, uint32_alt *ptr2, uint32_t a)
{
        /* fixes aliasing, but should be as fast as simple accesses */
        uint32_t val = 0;
        FIXEDMEMCPY(ptr, &val, 4);
        FIXEDMEMCPY(ptr2 , &a, 4);
        uint32_t val2;
        FIXEDMEMCPY(&val2, ptr, 4);
        return val2;
}

00000000 <breakme>:
   0:   e3a03000        mov     r3, #0
   4:   e5803000        str     r3, [r0]
   8:   e1a00003        mov     r0, r3 // Oops: retval = 0
   c:   e5812000        str     r2, [r1]
  10:   e12fff1e        bx      lr

00000014 <fixme>:
  14:   e3a03000        mov     r3, #0
  18:   e5803000        str     r3, [r0]
  1c:   e5812000        str     r2, [r1]
  20:   e5900000        ldr     r0, [r0] // The load thats missing above
  24:   e24dd010        sub     sp, sp, #16 // Time for another 
  28:   e28dd010        add     sp, sp, #16 // Bugreport ?
  2c:   e12fff1e        bx      lr
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Subject: [Bug fortran/71783] [5/6/7 Regression ] ICE on valid code in gimplify_var_or_parm_decl at gimplify.c:1801
Date: Fri, 08 Jul 2016 21:15:00 -0000
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--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The solution turns that fixes the ICE turns out to be reasonably simple: We
were missing a charlen for the allocatable case.

What I do not yet understand is why this code was reached in the first place;
the temporary assignment should never happen for this case.

Index: frontend-passes.c
===================================================================
--- frontend-passes.c   (Revision 237949)
+++ frontend-passes.c   (Arbeitskopie)
@@ -665,12 +665,10 @@ create_var (gfc_expr * e, const char *vname)
     {
       gfc_expr *length;

+      symbol->ts.u.cl = gfc_new_charlen (ns, NULL);
       length = constant_string_length (e);
       if (length)
-       {
-         symbol->ts.u.cl = gfc_new_charlen (ns, NULL);
-         symbol->ts.u.cl->length = length;
-       }
+       symbol->ts.u.cl->length = length;
       else
        symbol->attr.allocatable = 1;
     }

Toon, does this fix the ICE for you as well?
>From gcc-bugs-return-530219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 21:54:21 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71820] New: ICE on valid C++ code: in arg_assoc_type, at cp/name-lookup.c:5583
Date: Fri, 08 Jul 2016 21:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71820

            Bug ID: 71820
           Summary: ICE on valid C++ code: in arg_assoc_type, at
                    cp/name-lookup.c:5583
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu
  Target Milestone: ---

The following C++ code causes an ICE when compiled with the current GCC trunk
on x86_64-linux-gnu in both 32-bit and 64-bit modes.  

It appears to affect all versions since at least as early as 4.4.x. 


$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160707 (experimental) [trunk revision 238117] (GCC)
$
$ clang++-3.8 -c small.cpp
$
$ g++-trunk -c small.cpp
small.cpp: In substitution of â€˜template<class T> void f1(__typeof__ (f(f0<T>)))
[with T = int]â€™:
small.cpp:13:16:   required from here
small.cpp:8:24: internal compiler error: in arg_assoc_type, at
cp/name-lookup.c:5583
 void f1 (__typeof__ (f (f0 < T >))) {}
                     ~~~^~~~~~~~~~~
0x8778d2 arg_assoc_type
        ../../gcc-source-trunk/gcc/cp/name-lookup.c:5583
0x877866 arg_assoc_args
        ../../gcc-source-trunk/gcc/cp/name-lookup.c:5594
0x877866 arg_assoc_type
        ../../gcc-source-trunk/gcc/cp/name-lookup.c:5566
0x8770cd arg_assoc
        ../../gcc-source-trunk/gcc/cp/name-lookup.c:5665
0x877298 arg_assoc
        ../../gcc-source-trunk/gcc/cp/name-lookup.c:5653
0x87c6d1 arg_assoc_args_vec
        ../../gcc-source-trunk/gcc/cp/name-lookup.c:5609
0x87c6d1 lookup_arg_dependent_1
        ../../gcc-source-trunk/gcc/cp/name-lookup.c:5714
0x87c6d1 lookup_arg_dependent(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>*)
        ../../gcc-source-trunk/gcc/cp/name-lookup.c:5742
0x815644 perform_koenig_lookup(cp_expr, vec<tree_node*, va_gc, vl_embed>*, int)
        ../../gcc-source-trunk/gcc/cp/semantics.c:2244
0x6e542e tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:16590
0x6d6c2f tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:15868
0x6ea34a tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc-source-trunk/gcc/cp/pt.c:13569
0x6f8752 tsubst_arg_types
        ../../gcc-source-trunk/gcc/cp/pt.c:12559
0x6f8b4c tsubst_function_type
        ../../gcc-source-trunk/gcc/cp/pt.c:12694
0x6e9fb7 tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc-source-trunk/gcc/cp/pt.c:13416
0x713b1d fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, bool, bool)
        ../../gcc-source-trunk/gcc/cp/pt.c:17795
0x67468b add_template_candidate_real
        ../../gcc-source-trunk/gcc/cp/call.c:3110
0x6753bc add_template_candidate
        ../../gcc-source-trunk/gcc/cp/call.c:3188
0x6753bc add_candidates
        ../../gcc-source-trunk/gcc/cp/call.c:5361
0x6779b9 perform_overload_resolution
        ../../gcc-source-trunk/gcc/cp/call.c:4045
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$


-------------------------------------------


int f (int);
int f (void (*) (int, int));

template < typename T >
void f0 (T x, __typeof__ (f (x)) y) {}

template < typename T >
void f1 (__typeof__ (f (f0 < T >))) {}

int main ()
{ 
  f0 < int > (0, 0);
  f1 < int > (0);
  return 0;
}
>From gcc-bugs-return-530220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Jul 08 22:25:29 2016
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Subject: [Bug fortran/68426] Simplification of SPREAD with a derived type element causes ICE
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68426

--- Comment #2 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Fri Jul  8 22:24:44 2016
New Revision: 238186

URL: https://gcc.gnu.org/viewcvs?rev=238186&root=gcc&view=rev
Log:
2016-07-08  Steven G. Kargl  <kargl@gcc.gnu.org>

        PR fortran/68426
        * simplify (gfc_simplify_spread): Adjust locus.

Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/simplify.c
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Subject: Re: 10 x 1036778084 = ??
To: Nobby-Hirand <nobby@ntools.net>, gcc-bugs@gcc.gnu.org
References: <1467954435905-1279231.post@n5.nabble.com>
From: Jim Wilson <jim.wilson@linaro.org>
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On 07/07/2016 10:07 PM, Nobby-Hirand wrote:
> I have just find strange answer, 10 x 1036778084 = 1777846248??

Your target has 32-bit integers.  The value 1036778084 is close to the
largest representable value.  Multiplying by anything larger than 2
causes an overflow, and the result gets truncated.  Try using %x to
print hex values to see what is wrong.  Or use long long instead of int
to get 64-bit values.

FYI With a more recent gcc version, you can compile with
-fsanitize=undefined and get this:

weathertop:2044$ ./a.out
tmp.c:11:5: runtime error: signed integer overflow: 10 * 1036778084
cannot be represented in type 'int'

FYI gcc-bugs@gcc.gnu.org is used for output from our bugzilla database.
  You shouldn't send email to this address.  You should either send
email to gcc-help or file a bug at https://gcc.gnu.org/bugzilla/

Jim


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