[Bug tree-optimization/123117] [16 Regression] LoongArch: wrong code at -O1/O2/O3

[xry111 at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123117

--- Comment #7 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
Reduced further to get rid of the builtin:

#include <stdio.h>

#define BS_VEC(type, num) type __attribute__((vector_size(num * sizeof(type))))
#define T BS_VEC(unsigned, 4)

int main ()
{
  BS_VEC(long int, 2) BS_VAR_0[1];
  BS_VEC(int, 4) tt = (BS_VEC(int, 4)){0x9e47d3d2, 0, 0, 0};
  asm("":"+f"(tt));
  BS_VEC(unsigned int, 2) SHUF = __builtin_shufflevector((T)tt, (T)tt, 0, 1);
  BS_VAR_0[0] = __builtin_convertvector(SHUF, BS_VEC(long int, 2));
  printf("0x%016lx\n", BS_VAR_0[0][0]);
}