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tree-optimization/122110 - do not reject all bit-precision reductions

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We can handle bitwise-operation reductions and reductions on mask
vectors just fine.

	PR tree-optimization/122110
	* tree-vect-loop.cc (vectorizable_reduction): Relax restriction
	to mode-precision operations.
This commit is contained in:
Richard Biener
2025-10-01 11:26:45 +02:00
committed by Richard Biener
parent a52f635700
commit c6865e7e15
1 changed files with 5 additions and 1 deletions
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6
gcc/tree-vect-loop.cc
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@@ -7187,7 +7187,11 @@ vectorizable_reduction (loop_vec_info loop_vinfo,
return false;
/* Do not try to vectorize bit-precision reductions. */
if (!type_has_mode_precision_p (op.type))
if (!VECTOR_BOOLEAN_TYPE_P (vectype_out)
&& !type_has_mode_precision_p (op.type)
&& op.code != BIT_AND_EXPR
&& op.code != BIT_IOR_EXPR
&& op.code != BIT_XOR_EXPR)
return false;
/* Lane-reducing ops also never can be used in a SLP reduction group