Re: [PATCH v1 0/2] arm: recognize vdupq idioms [PR124043]

Christophe Lyon via Sourceware Forge <[email protected]> Fri, 31 Jul 2026 13:40:13 +0000

Newsgroups	gmane.comp.gcc.patches
Message-ID	<bmm.hkwprrfwhs.gcc.gcc.clyon.208.538.REVIEW@forge-stage.sourceware.org>

Christophe Lyon (clyon) <[email protected]>) commented on the code:


> +++ gcc/config/arm/neon.md
> @@ -3538,2 +3537,2 @@
> -    {
> -      int elt = INTVAL (operands[2]);
> +  {
> +    if (REGNO (operands[1]) <= LAST_ARM_REGNUM)
Is this equivalent to which_alternative == 1 ?


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https://forge.sourceware.org/gcc/gcc/pulls/208#issuecomment-7021