[Bug c/63663] [NEON] wrong value when computing the leading zero of int16x4_t type at O2

[spf_zju at 126 dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63663

--- Comment #1 from wind <spf_zju at 126 dot com> ---
I find this issue is related to the definition of a MACRO.

/* The arm5 clz instruction returns 32.  */
#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  ((VALUE) = 32, 1).

I am confused that in the armv7 NEON, the mode is HI ,it is also equal 32. Is
it right ? anyone can give me some explanation .

I should post a patch to fix this bug soon.