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[Bug tree-optimization/70267] New: ICE on valid code at -O1 and above on x86_64-linux-gnu in propagate_necessity, at tree-ssa-dce.c:924
- From: "su at cs dot ucdavis.edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 17 Mar 2016 06:28:53 +0000
- Subject: [Bug tree-optimization/70267] New: ICE on valid code at -O1 and above on x86_64-linux-gnu in propagate_necessity, at tree-ssa-dce.c:924
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70267
Bug ID: 70267
Summary: ICE on valid code at -O1 and above on x86_64-linux-gnu
in propagate_necessity, at tree-ssa-dce.c:924
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following causes an ICE when compiled with the current GCC trunk at -O1 and
above on x86_64-linux-gnu in both 32-bit and 64-bit modes.
It seems to also affect all GCC versions since at least 4.6.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/6.0.0/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 6.0.0 20160317 (experimental) [trunk revision 234278] (GCC)
$
$ g++-trunk -w -c -O0 small.cpp
$
$ g++-trunk -w -c -O1 small.cpp
small.cpp: In function âvoid Bar4()â:
small.cpp:35:1: internal compiler error: in propagate_necessity, at
tree-ssa-dce.c:924
}
^
0xe72be3 propagate_necessity
../../gcc-source-trunk/gcc/tree-ssa-dce.c:924
0xe730ba perform_tree_ssa_dce
../../gcc-source-trunk/gcc/tree-ssa-dce.c:1599
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.
$
-----------------------------------------------------
extern "Java"
{
typedef __java_int jint;
namespace java
{
namespace lang
{
class Class;
class Object;
class Throwable {};
class Foo;
}
}
}
typedef struct java::lang::Object * jobject;
typedef struct java::lang::Throwable * jthrowable;
typedef class java::lang::Class * jclass;
using java::lang::Foo;
class Foo: public java::lang::Throwable
{
public:static::java::lang::Class class$;
};
extern "C" Foo _Jv_AllocObject (jclass) __attribute__ ((__malloc__));
extern "C" void _Jv_Throw (jthrowable) __attribute__ ((__noreturn__));
void
Bar4 (void)
{
Foo * f = new java::lang::Foo;
throw (f);
}