https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61202
--- Comment #1 from Carrot <carrot at google dot com> ---
In arm_neon.h, we have
__extension__ static __inline int16x8_t __attribute__ ((__always_inline__))
vqdmulhq_n_s16 (int16x8_t a, int16_t b)
{
int16x8_t result;
__asm__ ("sqdmulh %0.8h,%1.8h,%2.h[0]"
: "=w"(result)
: "w"(a), "w"(b)
: /* No clobbers */);
return result;
}
The register constraint for the last operand of sqdmulh is "w", it means
FP_REGS, the correct constraint should be "x", means FP_LO_REGS.
The trunk has the same problem.
