https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86542
Bug ID: 86542
Summary: wrong-code for collapsed taskloop which needs
omp_cpyfn
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
When a collapsed taskloop (collapse (2) and above) needs a cpyfn callback (e.g.
firstprivatization of non-POD variable), the generated cpyfn doesn't copy data
corresponding to _looptemp_ clauses (the first two are filled in by
GOMP_taskloop*, but the other ones need to be copied).
struct S { int s; S (); ~S (); S (const S &); };
S s;
S::S ()
{
}
S::~S ()
{
}
S::S (const S &x)
{
s = x.s;
}
__attribute__((noipa)) void
foo (int i, int j, int k, S s)
{
if (i != 0 || j != 0 || k != 0 || s.s != 12)
__builtin_abort ();
}
int
main ()
{
volatile int inc = 16, jnc = 16, knc = 16;
s.s = 12;
#pragma omp taskloop collapse (3) firstprivate (s)
for (int i = 0; i < 16; i += inc)
for (int j = 0; j < 16; j += jnc)
for (int k = 0; k < 16; k += knc)
foo (i, j, k, s);
return 0;
}
fails with -fopenmp at runtime with:
Floating point exception (core dumped)
136
