https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67064
Bug ID: 67064
Summary: Register asm variable broken
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: [email protected]
Target Milestone: ---
The following test case fails on x86_64-pc-linux-gnu, powerpc-rtems,
sparc-rtems:
struct s {
int i;
};
register struct s *reg __asm__( "1" );
int f(void)
{
int i;
i = reg->i;
i = (reg)->i;
return i;
}
Yields:
prreg.cc:5:20: warning: call-clobbered register used for global register
variable
register struct s *reg __asm__( "1" );
^
prreg.cc: In function ‘int f()’:
prreg.cc:12:8: error: address of explicit register variable ‘reg’ requested
i = (reg)->i;
^
Please note, that the line 11 "i = reg->i;" works.
