[Bug c/56572] New: GCC generates non-optimal transactional code when inlining nested transaction.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56572
Bug #: 56572
Summary: GCC generates non-optimal transactional code when
inlining nested transaction.
Classification: Unclassified
Product: gcc
Version: trans-mem
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: srdjan.sti...@gmail.com
GCC generates non-optimal transactional code
when inlining function that has transactional code.
This affects gcc-4.7 and gcc-4.8 (gcc version 4.8.0 20130222 (experimental)).
// example
int a;
static inline void f() {
__transaction_atomic {
++a;
}
}
void g() {
__transaction_atomic {
f();
}
}
void h() {
__transaction_atomic {
__transaction_atomic {
++a;
}
}
}
Generated code:
g():
subq$8, %rsp
movl$41, %edi
xorl%eax, %eax
call_ITM_beginTransaction
movl$41, %edi
xorl%eax, %eax
call_ITM_beginTransaction
movl$a, %edi
call_ITM_RfWU4
leal1(%rax), %esi
movl$a, %edi
call_ITM_WaWU4
call_ITM_commitTransaction
call_ITM_commitTransaction
addq$8, %rsp
ret
h():
subq$8, %rsp
movl$41, %edi
xorl%eax, %eax
call_ITM_beginTransaction
movl$a, %edi
call_ITM_RfWU4
leal1(%rax), %esi
movl$a, %edi
call_ITM_WaWU4
call_ITM_commitTransaction
addq$8, %rsp
ret
The bug:
The functions g() and h() should have the __same__ asm.
The problem is that GCC doesn't remove __nested__
_ITM_beginTransaction()/_ITM_commitTransaction
that are known at compile time.
Compiled with:
gcc-4.7 -v -O2 -fgnu-tm -c example.c
Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.7.2-5ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-5ubuntu1)
COLLECT_GCC_OPTIONS='-v' '-O2' '-fgnu-tm' '-c' '-mtune=generic' '-march=x86-64'
'-pthread'
/usr/lib/gcc/x86_64-linux-gnu/4.7/cc1 -quiet -v -imultiarch x86_64-linux-gnu
-D_REENTRANT example.c -quiet -dumpbase example.c -mtune=generic -march=x86-64
-auxbase example -O2 -version -fgnu-tm -fstack-protector -o /tmp/ccKJdU1H.s
GNU C (Ubuntu/Linaro 4.7.2-5ubuntu1) version 4.7.2 (x86_64-linux-gnu)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version 3.1.0-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory /usr/local/include/x86_64-linux-gnu
ignoring nonexistent directory
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../x86_64-linux-gnu/include
#include ... search starts here:
#include ... search starts here:
/usr/lib/gcc/x86_64-linux-gnu/4.7/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/4.7/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C (Ubuntu/Linaro 4.7.2-5ubuntu1) version 4.7.2 (x86_64-linux-gnu)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version 3.1.0-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: fbb4af59dce4dce949ee30395742b8d0
COLLECT_GCC_OPTIONS='-v' '-O2' '-fgnu-tm' '-c' '-mtune=generic' '-march=x86-64'
'-pthread'
as -v --64 -o example.o /tmp/ccKJdU1H.s
GNU assembler version 2.22.90 (x86_64-linux-gnu) using BFD version (GNU
Binutils for Ubuntu) 2.22.90.20120924
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-O2' '-fgnu-tm' '-c' '-mtune=generic' '-march=x86-64'
'-pthread'
[Bug c/56573] New: GCC generates non-optimal transactional code when inlining nested transaction.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56573
Bug #: 56573
Summary: GCC generates non-optimal transactional code when
inlining nested transaction.
Classification: Unclassified
Product: gcc
Version: trans-mem
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: srdjan.sti...@gmail.com
Created attachment 29621
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=29621
Minimal test case.
GCC generates non-optimal transactional code
when inlining function that has transactional code.
This affects gcc-4.7 and gcc-4.8 (gcc version 4.8.0 20130222 (experimental)).
// example
int a;
static inline void f() {
__transaction_atomic {
++a;
}
}
void g() {
__transaction_atomic {
f();
}
}
void h() {
__transaction_atomic {
__transaction_atomic {
++a;
}
}
}
Generated code:
g():
subq$8, %rsp
movl$41, %edi
xorl%eax, %eax
call_ITM_beginTransaction
movl$41, %edi
xorl%eax, %eax
call_ITM_beginTransaction
movl$a, %edi
call_ITM_RfWU4
leal1(%rax), %esi
movl$a, %edi
call_ITM_WaWU4
call_ITM_commitTransaction
call_ITM_commitTransaction
addq$8, %rsp
ret
h():
subq$8, %rsp
movl$41, %edi
xorl%eax, %eax
call_ITM_beginTransaction
movl$a, %edi
call_ITM_RfWU4
leal1(%rax), %esi
movl$a, %edi
call_ITM_WaWU4
call_ITM_commitTransaction
addq$8, %rsp
ret
The bug:
The functions g() and h() should have the __same__ asm.
The problem is that GCC doesn't remove __nested__
_ITM_beginTransaction()/_ITM_commitTransaction
that are known at compile time.
Compiled with:
gcc-4.7 -v -O2 -fgnu-tm -c example.c
Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.7.2-5ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-5ubuntu1)
COLLECT_GCC_OPTIONS='-v' '-O2' '-fgnu-tm' '-c' '-mtune=generic' '-march=x86-64'
'-pthread'
/usr/lib/gcc/x86_64-linux-gnu/4.7/cc1 -quiet -v -imultiarch x86_64-linux-gnu
-D_REENTRANT example.c -quiet -dumpbase example.c -mtune=generic -march=x86-64
-auxbase example -O2 -version -fgnu-tm -fstack-protector -o /tmp/ccKJdU1H.s
GNU C (Ubuntu/Linaro 4.7.2-5ubuntu1) version 4.7.2 (x86_64-linux-gnu)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version 3.1.0-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory /usr/local/include/x86_64-linux-gnu
ignoring nonexistent directory
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../x86_64-linux-gnu/include
#include ... search starts here:
#include ... search starts here:
/usr/lib/gcc/x86_64-linux-gnu/4.7/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/4.7/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C (Ubuntu/Linaro 4.7.2-5ubuntu1) version 4.7.2 (x86_64-linux-gnu)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version 3.1.0-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: fbb4af59dce4dce949ee30395742b8d0
COLLECT_GCC_OPTIONS='-v' '-O2' '-fgnu-tm' '-c' '-mtune=generic' '-march=x86-64'
'-pthread'
as -v --64 -o example.o /tmp/ccKJdU1H.s
GNU assembler version 2.22.90 (x86_64-linux-gnu) using BFD version (GNU
Binutils for Ubuntu) 2.22.90.20120924
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-O2' '-fgnu-tm' '-c'
[Bug c/56140] New: GCC inlines incorrect function in __transaction_relaxed
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56140
Bug #: 56140
Summary: GCC inlines incorrect function in
__transaction_relaxed
Classification: Unclassified
Product: gcc
Version: trans-mem
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: srdjan.sti...@gmail.com
Created attachment 29301
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=29301
Test case.
BUG: GCC inlines tm_clone function in serial irrevocable transaction.
This is incorrect and causes the slowdown of irrevocable transactions.
The correct behavior it to inline non-instrumented function.
The bug is present in 4.7.2 and 4.8 (gcc version 4.8.0 20130129)
when compiling with -O1, -O2, -O3.
// examle.c
int a;
__attribute__((noinline))
void g() {
asm();
}
__attribute__((noinline))
void f1() {
a++;
}
inline
void f2() {
a++;
}
int main() {
__transaction_relaxed {
g(); // start transaction in irrevocable mode
f1();
f2(); // BUG: compiler inlines tm_clone of f2()
// BUG FIX: compiler should inline original f2()
}
return 0;
}
Generated code:
g():
ret
f1():
addl$1, a(%rip)
ret
f2():
addl$1, a(%rip)
ret
main:
subq$8, %rsp
movl$74, %edi
xorl%eax, %eax
call_ITM_beginTransaction
callg()
callf1()
movl$a, %edi
call_ITM_RfWU4
leal1(%rax), %esi
movl$a, %edi
call_ITM_WaWU4
call_ITM_commitTransaction
xorl%eax, %eax
addq$8, %rsp
ret
a:
.zero4
Compiled with:
~# gcc-4.7 -v -O1 example.c -fgnu-tm -c
Using built-in specs.
COLLECT_GCC=gcc-4.7
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.7.2-5ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-5ubuntu1)
COLLECT_GCC_OPTIONS='-v' '-O1' '-fgnu-tm' '-c' '-mtune=generic' '-march=x86-64'
'-pthread'
/usr/lib/gcc/x86_64-linux-gnu/4.7/cc1 -quiet -v -imultiarch x86_64-linux-gnu
-D_REENTRANT example.c -quiet -dumpbase example.c -mtune=generic -march=x86-64
-auxbase example -O1 -version -fgnu-tm -fstack-protector -o /tmp/ccC3mWQQ.s
GNU C (Ubuntu/Linaro 4.7.2-5ubuntu1) version 4.7.2 (x86_64-linux-gnu)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version 3.1.0-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory /usr/local/include/x86_64-linux-gnu
ignoring nonexistent directory
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../x86_64-linux-gnu/include
#include ... search starts here:
#include ... search starts here:
/usr/lib/gcc/x86_64-linux-gnu/4.7/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/4.7/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C (Ubuntu/Linaro 4.7.2-5ubuntu1) version 4.7.2 (x86_64-linux-gnu)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version 3.1.0-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: fbb4af59dce4dce949ee30395742b8d0
COLLECT_GCC_OPTIONS='-v' '-O1' '-fgnu-tm' '-c' '-mtune=generic' '-march=x86-64'
'-pthread'
as -v --64 -o example.o /tmp/ccC3mWQQ.s
GNU assembler version 2.22.90 (x86_64-linux-gnu) using BFD version (GNU
Binutils for Ubuntu) 2.22.90.20120924
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/4.7/:/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-O1' '-fgnu-tm' '-c' '-mtune=generic' '-march=x86-64'
'-pthread'
[Bug c/56108] New: Asm statement in transaction_relaxed crashes compiler.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56108
Bug #: 56108
Summary: Asm statement in transaction_relaxed crashes compiler.
Classification: Unclassified
Product: gcc
Version: trans-mem
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: srdjan.sti...@gmail.com
Created attachment 29273
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=29273
Minimal test case.
Asm statement in transaction_relaxed crashes compiler.
Example:
// file: min.c
int main() {
__transaction_relaxed{ asm(); }
return 0;
}
Compiler error:
~# gcc -fgnu-tm min.c -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.7.2-2ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1)
COLLECT_GCC_OPTIONS='-fgnu-tm' '-v' '-mtune=generic' '-march=x86-64' '-pthread'
/usr/lib/gcc/x86_64-linux-gnu/4.7/cc1 -quiet -v -imultiarch x86_64-linux-gnu
-D_REENTRANT min.c -quiet -dumpbase min.c -mtune=generic -march=x86-64 -auxbase
min -version -fgnu-tm -fstack-protector -o /tmp/cckJBrnc.s
GNU C (Ubuntu/Linaro 4.7.2-2ubuntu1) version 4.7.2 (x86_64-linux-gnu)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version 3.1.0-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory /usr/local/include/x86_64-linux-gnu
ignoring nonexistent directory
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../x86_64-linux-gnu/include
#include ... search starts here:
#include ... search starts here:
/usr/lib/gcc/x86_64-linux-gnu/4.7/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/4.7/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C (Ubuntu/Linaro 4.7.2-2ubuntu1) version 4.7.2 (x86_64-linux-gnu)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version 3.1.0-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: efa32fef7aa241fa03ac6d7ad2a4a2cf
min.c: In function ‘main’:
min.c:1:5: internal compiler error: in expand_block_tm, at trans-mem.c:2375
Please submit a full bug report,
with preprocessed source if appropriate.
See file:///usr/share/doc/gcc-4.7/README.Bugs for instructions.
Preprocessed source stored into /tmp/ccPdFHFN.out file, please attach this to
your bugreport.
[Bug c/54646] New: gcc-4.7 crashes during compilation
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54646
Bug #: 54646
Summary: gcc-4.7 crashes during compilation
Classification: Unclassified
Product: gcc
Version: trans-mem
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: srdjan.sti...@gmail.com
Created attachment 28239
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=28239
compiler generated file (copy of the input program)
gcc-4.7 crashes during compilation of the following program:
int a;
int main() {
int i;
for (i = 0; i 1; ++i) {
__transaction_atomic {
++a;
}
}
return 0;
}
Machine:
uname -a
Linux srdjan-Latitude-E6410 3.2.0-30-generic #48-Ubuntu SMP Fri Aug 24 16:52:48
UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
Program is compiled with:
gcc-4.7 -save-temps -v -O3 -fgnu-tm gccbug.c
Using built-in specs.
COLLECT_GCC=gcc-4.7
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.7.0-7ubuntu3' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7
--libdir=/usr/lib --enable-nls --disable-bootstrap --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-gnu-unique-object --enable-plugin --enable-objc-gc --disable-werror
--with-arch-32=i686 --with-tune=generic --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.7.0 (Ubuntu/Linaro 4.7.0-7ubuntu3)
COLLECT_GCC_OPTIONS='-save-temps' '-v' '-O3' '-fgnu-tm' '-mtune=generic'
'-march=x86-64' '-pthread'
/usr/lib/gcc/x86_64-linux-gnu/4.7/cc1 -E -quiet -v -imultiarch
x86_64-linux-gnu -D_REENTRANT gccbug.c -mtune=generic -march=x86-64 -fgnu-tm
-O3 -fpch-preprocess -fstack-protector -o gccbug.i
ignoring nonexistent directory /usr/local/include/x86_64-linux-gnu
ignoring nonexistent directory
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../x86_64-linux-gnu/include
#include ... search starts here:
#include ... search starts here:
/usr/lib/gcc/x86_64-linux-gnu/4.7/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/4.7/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-save-temps' '-v' '-O3' '-fgnu-tm' '-mtune=generic'
'-march=x86-64' '-pthread'
/usr/lib/gcc/x86_64-linux-gnu/4.7/cc1 -fpreprocessed gccbug.i -quiet -dumpbase
gccbug.c -mtune=generic -march=x86-64 -auxbase gccbug -O3 -version -fgnu-tm
-fstack-protector -o gccbug.s
GNU C (Ubuntu/Linaro 4.7.0-7ubuntu3) version 4.7.0 (x86_64-linux-gnu)
compiled by GNU C version 4.6.3, GMP version 5.0.2, MPFR version 3.1.0-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C (Ubuntu/Linaro 4.7.0-7ubuntu3) version 4.7.0 (x86_64-linux-gnu)
compiled by GNU C version 4.6.3, GMP version 5.0.2, MPFR version 3.1.0-p3,
MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 354a288ebaaed8d49a2cf74c30c06d62
gccbug.c: In function ‘main’:
gccbug.c:3:5: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See file:///usr/share/doc/gcc-4.7/README.Bugs for instructions.
Preprocessed source stored into /tmp/cczqotdH.out file, please attach this to
your bugreport.
