[Bug target/105923] New: unsupported return type ‘complex double’ for simd

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105923

            Bug ID: 105923
           Summary: unsupported return type ‘complex double’ for simd
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: crazylht at gmail dot com, wwwhhhyyy333 at gmail dot com
  Target Milestone: ---
            Target: x86-64

[hjl@gnu-tgl-3 tmp]$ cat c.c 
__attribute__ ((__simd__ ("notinbranch")))
double _Complex foo (double _Complex __x) __attribute__ ((__nothrow__ ,
__leaf__));
double _Complex foo (double _Complex __x) __attribute__ ((__nothrow__ ,
__leaf__));

int N = 3200;
double _Complex b[3200];
double _Complex a[3200];

void
bar (void)
{
  int i;

  for (i = 0; i < N; i += 1)
    b[i] = foo (a[i]);
}
[hjl@gnu-tgl-3 tmp]$ gcc -S -Ofast c.c
c.c:3:17: warning: unsupported return type ‘complex double’ for simd
    3 | double _Complex foo (double _Complex __x) __attribute__ ((__nothrow__ ,
__leaf__));
      |                 ^~~
[hjl@gnu-tgl-3 tmp]$