https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122748
Bug ID: 122748
Summary: [OpenMP] ICE segfault with invalid 'allocate' clause
in c_parser_omp_clause_allocate at c-parser.cc:19348
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code, openmp
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
Target Milestone: ---
The following code is fine with '#include <omp.h>' but as there isn't, which
leads to an ICE. C++ seems to be fine, only C has that issue.
It only shows here with mainline, but I assume that's because of a checking
assert.
* * *
foo.c: In function ‘f’:
foo.c:4:38: error: ‘omp_default_mem_alloc’ undeclared (first use in this
function)
4 | #pragma omp taskloop simd allocate(omp_default_mem_alloc: a)
private(a)
| ^~~~~~~~~~~~~~~~~~~~~
foo.c:4:38: note: each undeclared identifier is reported only once for each
function it appears in
... OK – but then the ICE ...
foo.c:4:11: internal compiler error: tree check: expected class ‘type’, have
‘exceptional’ (error_mark) in c_parser_omp_clause_allocate, at
c/c-parser.cc:19348
Here, expr.original_type = NULL and ...
19346 orig_type = expr.original_type
19347 ? expr.original_type : TREE_TYPE (allocator);
19348 orig_type = TYPE_MAIN_VARIANT (orig_type);
(gdb) p debug_tree(allocator)
<error_mark 0x7ffff7402f48>
and (after line 19347, before line 19348):
(gdb) p debug_tree(orig_type)
<error_mark 0x7ffff7402f48>
----------------------------------------
void f()
{
int a;
#pragma omp taskloop simd allocate(omp_default_mem_alloc: a) private(a)
for(int i =0; i < 1; i++)
a = 5;
}
