On Wed, Nov 23, 2016 at 09:14:44PM +0000, Joseph Myers wrote:
> This patch adds an insn pattern similar to various patterns already
> present to handle extracting such a subreg. This allows the glibc
> build to get further, until it runs into an assembler error for which
> I have another patch. OK to commit?
>
> gcc:
> 2016-11-23 Joseph Myers <jos...@codesourcery.com>
>
> * config/rs6000/spe.md (*frob_<SPE64:mode>_ti_8): New insn
> pattern.
>
> gcc/testsuite:
> 2016-11-23 Joseph Myers <jos...@codesourcery.com>
>
> * gcc.c-torture/compile/20161123-1.c: New test.
Okay, thanks! One question...
> --- gcc/testsuite/gcc.c-torture/compile/20161123-1.c (nonexistent)
> +++ gcc/testsuite/gcc.c-torture/compile/20161123-1.c (working copy)
> @@ -0,0 +1,7 @@
> +double
> +f (long double x)
> +{
> + union { long double ld; double d[2]; } u;
> + u.ld = x;
> + return u.d[1];
> +}
This is undefined behaviour with -mlong-double-64; do we care?
Segher
