https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95479
Bug ID: 95479
Summary: ICE in convert_move, at expr.c:271
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: royeldar at hotmail dot com
Target Milestone: ---
The following code doesn't compile and results in an ICE.
I suspect this behavior has something to do with the line
__attribute__((target(("avx2"))))
$ cat bug.c
typedef long long __m256i __attribute__((__vector_size__(32), __may_alias__));
struct {
__m256i w256;
} g_var;
__attribute__((target(("avx2"))))
void func() {
__m256i var = g_var.w256;
(void)var;
}
$ gcc -c -v bug.c
Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 6.3.0-18+deb9u1'
--with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs --enable-languages=c,ada
,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-6
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --disable-browser-plugin --enable-java-awt=gtk
--enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre
--enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32
--enable-multilib --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 6.3.0 20170516 (Debian 6.3.0-18+deb9u1)
COLLECT_GCC_OPTIONS='-c' '-v' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/6/cc1 -quiet -v -imultiarch x86_64-linux-gnu
bug.c -quiet -dumpbase bug.c -mtune=generic -march=x86-64 -auxbase bug
-version
-o /tmp/ccpCodYe.s
GNU C11 (Debian 6.3.0-18+deb9u1) version 6.3.0 20170516 (x86_64-linux-gnu)
compiled by GNU C version 6.3.0 20170516, GMP version 6.1.2,
MPFR version 3.1.5, MPC version 1.0.3, isl version 0.15
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/6/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-linux-gnu/6/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/6/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C11 (Debian 6.3.0-18+deb9u1) version 6.3.0 20170516 (x86_64-linux-gnu)
compiled by GNU C version 6.3.0 20170516, GMP version 6.1.2,
MPFR version 3.1.5, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: b8e5d7f3c4236757ee0871869b8330f3
bug.c: In function ‘func’:
bug.c:9:10: internal compiler error: in convert_move, at expr.c:271
__m256i var = g_var.w256;
^~~
