collapse Clause

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

4.4.3 collapse Clause


Name: collapse	Properties: unique

Arguments


Name	Type	Properties

n	expression of integer type	default

Directives

Semantics

The collapse clause associates one or more loops with the directive on which it appears for the purpose of identifying the portion of the depth of the canonical loop nest to which to apply the semantics of the directive. The argument n speciﬁes the number of loops of the associated loop nest to which to apply those semantics. On all directives on which the collapse clause may appear, the eﬀect is as if a value of one was speciﬁed for n if the collapse clause is not speciﬁed.

Restrictions

n must not evaluate to a value greater than the depth of the associated loop nest.

Cross References

distribute directive, see Section 11.6
do directive, see Section 11.5.2
for directive, see Section 11.5.1
loop directive, see Section 11.7
ordered clause, see Section 4.4.4
simd directive, see Section 10.4
taskloop directive, see Section 12.6

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