miyuki added a comment.
For intrinsics that are plain functions (not macros) you could just check the
signatures using assignments to function pointers, e.g.:
#include <arm_neon.h>
uint16_t (*fp1)(int32_t) = &vqmovuns_s32;
$ clang -target=aarch64-arm-none-eabi -march=armv8-a+simd -c neon.c
-fsyntax-only -Werror=incompatible-function-pointer-types
neon.c:2:12: error: incompatible function pointer types initializing
'uint16_t (*)(int32_t)' (aka 'unsigned short (*)(int)') with an expression of
type 'int16_t (*)(int32_t)' (aka 'short (*)(int)')
[-Werror,-Wincompatible-function-pointer-types]
uint16_t (*fp1)(int32_t) = &vqmovuns_s32;
^ ~~~~~~~~~~~~~
1 error generated.
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https://reviews.llvm.org/D85118/new/
https://reviews.llvm.org/D85118
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