ordered Clause

| OPENMP API Specification: "Version 5.2 -- GIT rev 95b2e3a44"

4.4.4 ordered Clause


Name: ordered	Properties: unique

Arguments


Name	Type	Properties

n	expression of integer type	optional, constant, positive

Directives

for

simd

Semantics

The ordered clause associates one or more loops with the directive on which it appears for the purpose of identifying cross-iteration dependences. The argument n speciﬁes the number of loops of the associated loop to use for that purpose. If n is not speciﬁed then the behavior is as if n is speciﬁed with the same value as is speciﬁed for the collapse clause on the construct.

Restrictions

None of the associated loops may be non-rectangular loops.
The ordered clause must not appear on a worksharing-loop directive if the associated loops include the generated loops of a tile directive.
n must not evaluate to a value greater than the depth of the associated loop nest.
If n is explicitly speciﬁed, the associated loops must be perfectly nested.
If n is explicitly speciﬁed and the collapse clause is also speciﬁed for the ordered clause on the same construct, n must be greater than or equal to the n speciﬁed for the collapse clause.
If n is explicitly speciﬁed, a linear clause must not be speciﬁed on the same directive.

∙ If n is explicitly speciﬁed, none of the associated loops may be a range-based for loop.

Cross References

collapse clause, see Section 4.4.3
do directive, see Section 11.5.2
for directive, see Section 11.5.1
linear clause, see Section 5.4.6
simd directive, see Section 10.4
tile directive, see Section 9.1

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