https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69257
Bug ID: 69257
Summary: g++ ICE (segfault) on x86_64-linux-gnu in
"create_tmp_var"
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: helloqirun at gmail dot com
Target Milestone: ---
The following code causes an ICE when compiled with the current g++ trunk on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
It also crashes 4.4, 4.6 and 4.8.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 6.0.0 20160112 (experimental) [trunk revision 232269] (GCC)
$ g++-4.4 -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.4.7-8ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs
--enable-languages=c,c++,fortran --prefix=/usr --program-suffix=-4.4
--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++/4.4 --libdir=/usr/lib --enable-nls
--with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--disable-libmudflap --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 4.4.7 (Ubuntu/Linaro 4.4.7-8ubuntu1)
$ g++-4.4 -c abc.cc
abc.cc: In function ‘int fn1()’:
abc.cc:3: internal compiler error: in create_tmp_var, at gimplify.c:556
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.4/README.Bugs> for instructions.
$ g++-trunk -c abc.cc
abc.cc: In function ‘int fn1()’:
abc.cc:3:20: internal compiler error: in create_tmp_var, at gimple-expr.c:473
__asm ( "": :"" (*x));
^~
0xa9d883 create_tmp_var(tree_node*, char const*)
../../gcc/gcc/gimple-expr.c:473
0xaccd2e create_tmp_from_val
../../gcc/gcc/gimplify.c:498
0xaccd2e lookup_tmp_var
../../gcc/gcc/gimplify.c:519
0xaccd2e internal_get_tmp_var
../../gcc/gcc/gimplify.c:563
0xac49f6 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.c:11035
0xadabd4 gimplify_asm_expr
../../gcc/gcc/gimplify.c:5320
0xac6679 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.c:10434
0xac9f06 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.c:5616
0xac52ff gimplify_cleanup_point_expr
../../gcc/gcc/gimplify.c:5392
0xac52ff gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.c:10479
0xac9f06 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.c:5616
0xac62fb gimplify_statement_list
../../gcc/gcc/gimplify.c:1526
0xac62fb gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.c:10531
0xac9f06 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.c:5616
0xacb12d gimplify_bind_expr
../../gcc/gcc/gimplify.c:1142
0xac5252 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.c:10313
0xac9f06 gimplify_stmt(tree_node**, gimple**)
../../gcc/gcc/gimplify.c:5616
0xacbdb5 gimplify_body(tree_node*, bool)
../../gcc/gcc/gimplify.c:11245
0xacc3e6 gimplify_function_tree(tree_node*)
../../gcc/gcc/gimplify.c:11401
0x953da7 cgraph_node::analyze()
../../gcc/gcc/cgraphunit.c:625
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.
-----
$ cat abc.cc
int fn1() {
struct S *x;
__asm ( "": :"" (*x));
}
