[Bug target/126676] [17 Regression] ICE with XFmode under -mavx10.2 -mapxf

ubizjak at gmail dot com via Gcc-bugs <[email protected]> Thu, 06 Aug 2026 09:34:19 +0000

Newsgroups	gmane.comp.gcc.bugs
Message-ID	<[email protected]/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126676

--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
Comment on attachment 65254
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65254
Untested fix.

>       /* We only have vcomisbf16, No vcomubf16 nor vcomxbf16 */
>       if (GET_MODE (op0) != E_BFmode)
> 	{
>-	  if (TARGET_AVX10_2 && (code == EQ || code == NE))
>+	  /* VCOMX/VUCOMX are SSE instructions, so they only exist for the
>+	     modes an xmm register can hold: there is no XFmode form.  */
>+	  if (TARGET_AVX10_2
>+	      && (code == EQ || code == NE)
>+	      && (GET_MODE (op0) == HFmode
>+		  || SSE_FLOAT_MODE_P (GET_MODE (op0))))

If the target pattern does not use SSE_FLOAT_MODE_P predicate, then just use
(GET_MODE (op0) == SFmode || GET_MODE (op0) == DFmode) directly.