http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59627
Bug ID: 59627
Summary: ICE with OpenMP "declare reduction" and -flto
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: reichelt at gcc dot gnu.org
The following valid code snippet (compiled with "-fopenmp -flto")
triggers an ICE on trunk since 2013-10-11:
==============================================================
struct A { int i; };
void foo()
{
A a;
#pragma omp declare reduction (+: A: omp_out.i += omp_in.i)
#pragma omp parallel reduction (+: a)
;
}
==============================================================
bug.cc:6:11: internal compiler error: in discriminator_for_local_entity, at
cp/mangle.c:1745
#pragma omp declare reduction (+: A: omp_out.i += omp_in.i)
^
0x73a658 discriminator_for_local_entity
../../gcc/gcc/cp/mangle.c:1745
0x73a658 write_local_name
../../gcc/gcc/cp/mangle.c:1833
0x73a658 write_name
../../gcc/gcc/cp/mangle.c:847
0x73a92b write_encoding
../../gcc/gcc/cp/mangle.c:714
0x743398 mangle_decl_string
../../gcc/gcc/cp/mangle.c:3433
0x743577 get_mangled_id
../../gcc/gcc/cp/mangle.c:3455
0x743577 mangle_decl(tree_node*)
../../gcc/gcc/cp/mangle.c:3478
0xd91200 decl_assembler_name(tree_node*)
../../gcc/gcc/tree.c:600
0xd92c46 assign_assembler_name_if_neeeded(tree_node*)
../../gcc/gcc/tree.c:5505
0xdacf2e free_lang_data_in_cgraph
../../gcc/gcc/tree.c:5560
0xdacf2e free_lang_data
../../gcc/gcc/tree.c:5597
0xdacf2e execute
../../gcc/gcc/tree.c:5646
Please submit a full bug report, [etc.]
Jakub, this appeared right after your big OpenMP 4.0 patch
(where "omp declare reduction" was introduced):
2013-10-11 Jakub Jelinek <ja...@redhat.com>
* decl.c (duplicate_decls): Error out for redeclaration of UDRs.
(declare_simd_adjust_this): New function.
(grokfndecl): If "omp declare simd" attribute is present,
call declare_simd_adjust_this if needed and
c_omp_declare_simd_clauses_to_numbers.
[...]
Would you mind having a look?
