https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96591
Bug ID: 96591
Summary: ICE with -flto=auto and -O1: tree code ‘typename_type’
is not supported in LTO streams
Product: gcc
Version: 10.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc-bugs at marehr dot dialup.fu-berlin.de
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Hi gcc-team,
I'm not sure if this is the right component.
The following code:
```c++
template <typename scalar_t, unsigned length>
struct builtin_simd
{
using type [[gnu::vector_size(sizeof(scalar_t) * length)]] = scalar_t;
};
struct simd_traits
{
using scalar_type = int;
template <typename new_scalar_type>
using rebind = typename builtin_simd<new_scalar_type, 1>::type;
};
template <typename simd_t>
constexpr simd_t fill(typename simd_traits::scalar_type const scalar)
{
return simd_t{scalar};
}
class Test
{
using score_type = typename builtin_simd<int, 1>::type;
score_type data[1]{fill<score_type>(8)};
};
struct TestFactoryBase
{
virtual Test *CreateTest() = 0;
};
template <class TestClass>
struct TestFactoryImpl : public TestFactoryBase
{
Test *CreateTest() override { return new TestClass; }
};
void MakeAndRegisterTestInfo(TestFactoryBase *factory);
int main() {
MakeAndRegisterTestInfo(new TestFactoryImpl<Test>);
}
```
https://godbolt.org/z/55xTod
produces with
> > g++ -O1 -flto=auto ice.cpp
> during IPA pass: pure-const
> ice.cpp:42:1: internal compiler error: tree code ‘typename_type’ is not
> supported in LTO streams
> 42 | }
> | ^
> Please submit a full bug report, with preprocessed source if appropriate.
> See <https://bugs.archlinux.org/> for instructions.
that error.
Some notes:
* removing "using rebind = typename builtin_simd<new_scalar_type, 1>::type;" or
* removing "constexpr" from constexpr simd_t fill(typename
simd_traits::scalar_type const scalar)
will make it compile.
Thank you!
