[Bug c++/90853] New: -O3 complains already defined symbol

[zhonghao at pku dot org.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90853

            Bug ID: 90853
           Summary: -O3 complains already defined symbol
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zhonghao at pku dot org.cn
  Target Milestone: ---

My gcc is 10.0.0, and the code is:

void x();
void rgb2yuv16bit_mmx422_row();

void x()
{
  rgb2yuv16bit_mmx422_row();
}

void rgb2yuv16bit_mmx422_row()
{
  __asm__ __volatile__ (
  "rgb2yuv16_422:\n"
  );
}

gcc accepts the code, but with -O3, it rejects it:

x.cpp: Assembler messages:
x.cpp:13: Error: symbol `rgb2yuv16_422' is already defined