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tree-optimization/114921 - _Float16 -> __bf16 isn't noop fixup

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The following further strengthens the check which convert expressions
we allow to vectorize as simple copy by resorting to
tree_nop_conversion_p on the vector components.

	PR tree-optimization/114921
	* tree-vect-stmts.cc (vectorizable_assignment): Use
	tree_nop_conversion_p to identify converts we can vectorize
	with a simple assignment.
This commit is contained in:
Richard Biener 2024-05-06 12:03:09 +02:00
parent 79649a5dcd
commit d0d6dcc019
1 changed files with 3 additions and 3 deletions
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6
gcc/tree-vect-stmts.cc
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@ -5957,15 +5957,15 @@ vectorizable_assignment (vec_info *vinfo,
/* We can handle VIEW_CONVERT conversions that do not change the number
of elements or the vector size or other conversions when the component
mode keeps the same. */
types are nop-convertible. */
if (!vectype_in
|| maybe_ne (TYPE_VECTOR_SUBPARTS (vectype_in), nunits)
|| (code == VIEW_CONVERT_EXPR
&& maybe_ne (GET_MODE_SIZE (TYPE_MODE (vectype)),
GET_MODE_SIZE (TYPE_MODE (vectype_in))))
|| (CONVERT_EXPR_CODE_P (code)
&& (TYPE_MODE (TREE_TYPE (vectype))
!= TYPE_MODE (TREE_TYPE (vectype_in)))))
&& !tree_nop_conversion_p (TREE_TYPE (vectype),
TREE_TYPE (vectype_in))))
return false;
if (VECTOR_BOOLEAN_TYPE_P (vectype) != VECTOR_BOOLEAN_TYPE_P (vectype_in))