| Summary: | ICE with _Cilk_spawn in expression within template function | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Volker Reichelt <reichelt> |
| Component: | c++ | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED WONTFIX | ||
| Severity: | normal | CC: | bviyer, hvdieren, webrown.cpp |
| Priority: | P3 | Keywords: | ice-on-valid-code |
| Version: | 4.9.0 | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Known to work: | ||
| Known to fail: | 4.9.0 | Last reconfirmed: | 2015-02-10 00:00:00 |
| Bug Depends on: | |||
| Bug Blocks: | 69582 | ||
Balaji, this is your domain, would you mind having a look? Hi,
I've just got the same error with current Debian's gcc-snapshot (20140212) when trying to compile a code that uses the Blitz++ library, and after replacing all "#pragma ivdep" with "#pragma GCC ivdep" in that library...
/usr/include/blitz/globeval.cc:466:12: internal compiler error: in tsubst_copy, at cp/pt.c:12887
for (; i < uneven_start; ++i)
^
Please submit a full bug report,
with preprocessed source if appropriate.
I can provide more details if needed.
HTH,
Sylwester
(In reply to Sylwester Arabas from comment #2) > Hi, > > I've just got the same error with current Debian's gcc-snapshot (20140212) > when trying to compile a code that uses the Blitz++ library, and after > replacing all "#pragma ivdep" with "#pragma GCC ivdep" in that library... > > /usr/include/blitz/globeval.cc:466:12: internal compiler error: in > tsubst_copy, at cp/pt.c:12887 > for (; i < uneven_start; ++i) > ^ > Please submit a full bug report, > with preprocessed source if appropriate. > > I can provide more details if needed. Hi Sylwester, The issue with #pragma ivdep is not relevant for this bug. Can you please open another bug report for that and discuss it there? Thanks, Balaji V. Iyer. > > HTH, > Sylwester Here it is: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60267 HTH, Sylwester Confirmed. *** Bug 61286 has been marked as a duplicate of this bug. *** The following code snippet
===========================================
template<typename T> int foo()
{
int i = (_Cilk_spawn foo<T>()) + 0;
return i;
}
template int foo<int>();
===========================================
is invalid. You are not allowed to use the result of a spawned function until after a _Cilk_sync; statement.
But that is no excuse for an ICE.
Cilk Plus, deprecated for 7.x, will not be in 8.x. |
The following valid(?) code snippet (compiled with "-fcilkplus") triggers an ICE on trunk: =========================================== template<typename T> int foo() { int i = (_Cilk_spawn foo<T>()) + 0; return i; } template int foo<int>(); =========================================== bug.cc: In instantiation of 'int foo() [with T = int]': bug.cc:7:23: required from here bug.cc:3:31: internal compiler error: in tsubst_copy, at cp/pt.c:12887 int i = (_Cilk_spawn foo<T>()) + 0; ^ 0x62a933 tsubst_copy ../../gcc/gcc/cp/pt.c:12887 0x607956 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc/gcc/cp/pt.c:15110 0x608fda tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool, bool) ../../gcc/gcc/cp/pt.c:14188 0x6115c6 tsubst_expr ../../gcc/gcc/cp/pt.c:13812 0x61435d tsubst_expr ../../gcc/gcc/cp/pt.c:13327 0x611093 tsubst_expr ../../gcc/gcc/cp/pt.c:13219 0x61208c tsubst_expr ../../gcc/gcc/cp/pt.c:13424 0x60f2a9 instantiate_decl(tree_node*, int, bool) ../../gcc/gcc/cp/pt.c:19690 0x64d8c7 instantiate_pending_templates(int) ../../gcc/gcc/cp/pt.c:19806 0x688bed cp_write_global_declarations() ../../gcc/gcc/cp/decl2.c:4148 Please submit a full bug report, [etc.]