https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68516
Bug ID: 68516
Summary: ICE: OpenMP with simd collapse
Product: gcc
Version: 5.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: wdv4758h+gcc at gmail dot com
Target Milestone: ---
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc-multilib/src/gcc-5.2.0/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release --with-default-libstdcxx-abi=gcc4-compatible
Thread model: posix
gcc version 5.2.0 (GCC)
========================================
$ cat test1.c
int a[100];
int main()
{
#pragma omp simd collapse(2)
for (int i = 0; i < 10; i++) {
for (int k = a[i]; k < 0; k++) {
a[i] = a[i] - 1;
}
}
return 0;
}
========================================
$ gcc -O3 -fopenmp test1.c
test1.c: In function ‘main’:
test1.c:7:23: warning: ‘i’ is used uninitialized in this function
[-Wuninitialized]
for (int k = a[i]; k < 0; k++) {
^
test1.c:3:5: internal compiler error: in expand_one_var, at cfgexpand.c:1339
int main()
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.archlinux.org/> for instructions.
========================================
$ cat test2.c
int a[100];
int main()
{
#pragma omp for simd collapse(2)
for (int i = 0; i < 10; i++) {
for (int k = a[i]; k < 0; k++) {
a[i] = a[i] - 1;
}
}
return 0;
}
========================================
$ gcc -O3 -fopenmp test2.c
test2.c: In function ‘main’:
test2.c:7:23: internal compiler error: in gimplify_var_or_parm_decl, at
gimplify.c:1801
for (int k = a[i]; k < 0; k++) {
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.archlinux.org/> for instructions.
========================================
