From 09b7993ab6d93716f77c03ff9a9165fa4b579f0d Mon Sep 17 00:00:00 2001
From: Richard Biener <rguenther@suse.de>
Date: Tue, 22 Nov 2022 09:03:53 +0100
Subject: [PATCH] tree-optimization/107672 - avoid vector mode type_for_mode
call
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.
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 bc0ef136f197..b35b986889d3 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)
--
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