https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95105
Bug ID: 95105
Summary: Bogus reference-compatibility error for
arm_sve_vector_bits
Product: gcc
Version: 10.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: rsandifo at gcc dot gnu.org
Target Milestone: ---
Target: aarch64*-*-*
Compiling this testcase with -march=armv8.2-a+sve
-msve-vector-bits=512:
----------------------------------------------------------
typedef __SVFloat32_t foo;
typedef foo bar __attribute__((arm_sve_vector_bits(512)));
template<typename T> struct s { T x; };
extern s<bar> a;
bar &b = a.x;
----------------------------------------------------------
gives the bogus error:
error: cannot bind non-const lvalue reference of type ‘bar&’ {aka
‘__SVFloat32_t&’} to an rvalue of type ‘bar’ {aka ‘__SVFloat32_t’}
5 | bar &b = a.x;
| ~~^
The testcase works if the attribute is applied directly
to __SVFloat32_t.
The bug is in the target-specific handling of the attribute.
