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* [PATCH] tree-optimization/107672 - avoid vector mode type_for_mode call
@ 2022-11-22  8:48 Richard Biener
  2022-11-25 13:30 ` Vaseeharan Vinayagamoorthy
  0 siblings, 1 reply; 4+ messages in thread
From: Richard Biener @ 2022-11-22  8:48 UTC (permalink / raw)
  To: gcc-patches

The following avoids using type_for_mode on vector modes which might
not work for all frontends.  Instead we look for the inner mode
type and use build_vector_type_for_mode instead.

Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.

	PR tree-optimization/107672
	* tree-vect-stmts.cc (supportable_widening_operation): Avoid
	type_for_mode on vector modes.
---
 gcc/tree-vect-stmts.cc | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index bc0ef136f19..b35b986889d 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -12195,9 +12195,15 @@ supportable_widening_operation (vec_info *vinfo,
 	intermediate_type
 	  = vect_halve_mask_nunits (prev_type, intermediate_mode);
       else
-	intermediate_type
-	  = lang_hooks.types.type_for_mode (intermediate_mode,
-					    TYPE_UNSIGNED (prev_type));
+	{
+	  gcc_assert (VECTOR_MODE_P (intermediate_mode));
+	  tree intermediate_element_type
+	    = lang_hooks.types.type_for_mode (GET_MODE_INNER (intermediate_mode),
+					      TYPE_UNSIGNED (prev_type));
+	  intermediate_type
+	    = build_vector_type_for_mode (intermediate_element_type,
+					  intermediate_mode);
+	}
 
       if (VECTOR_BOOLEAN_TYPE_P (intermediate_type)
 	  && VECTOR_BOOLEAN_TYPE_P (prev_type)
-- 
2.35.3

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2022-11-28 16:06 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-11-22  8:48 [PATCH] tree-optimization/107672 - avoid vector mode type_for_mode call Richard Biener
2022-11-25 13:30 ` Vaseeharan Vinayagamoorthy
2022-11-25 20:08   ` Richard Biener
2022-11-28 16:06     ` Alex Coplan

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