Alexandre Oliva via Gcc-patches <[email protected]> writes:
> On vxworks, isunordered is defined as a macro that ultimately calls a
> _Fpcomp function, that GCC doesn't recognize as a builtin, so it
> can't optimize accordingly.
>
> Use __builtin_isunordered instead to get the desired code for the
> test.
>
> Regstrapped on x86_64-linux-gnu. Also tested on aarch64-vx7r2 with
> gcc-12. Ok to install?
>
>
> for gcc/testsuite/ChangeLog
>
> * gcc.target/aarch64/pred-not-gen-4.c: Drop math.h include,
> call builtin.
OK, thanks.
Richard
> ---
> .../gcc.target/aarch64/sve/pred-not-gen-4.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pred-not-gen-4.c
> b/gcc/testsuite/gcc.target/aarch64/sve/pred-not-gen-4.c
> index 0001dd3fc211f..1845bd3f0f704 100644
> --- a/gcc/testsuite/gcc.target/aarch64/sve/pred-not-gen-4.c
> +++ b/gcc/testsuite/gcc.target/aarch64/sve/pred-not-gen-4.c
> @@ -1,12 +1,10 @@
> /* { dg-do compile } */
> /* { dg-options "-O3" } */
>
> -#include <math.h>
> -
> void f13(double * restrict z, double * restrict w, double * restrict x,
> double * restrict y, int n)
> {
> for (int i = 0; i < n; i++) {
> - z[i] = (isunordered(w[i], 0)) ? x[i] + w[i] : y[i] - w[i];
> + z[i] = (__builtin_isunordered(w[i], 0)) ? x[i] + w[i] : y[i] - w[i];
> }
> }
