OMPRegion¶
An OpenMP region: a directive, its clauses and the code it applies to.
Declaración¶
Sintaxis¶
OMPRegion(omp_region_type region, omp_clause* clauses, stmt* body, exec_target exec_target)
Argumentos¶
Argument |
Descripción |
|---|---|
|
which directive this is; see omp_region_type. |
|
the clauses of the directive; see omp_clause. |
|
the statements the directive applies to. |
|
which lowering runs the region; see exec_target. |
Valores devueltos¶
None.
Descripción¶
One node represents every OpenMP construct. region says which directive it
is, clauses carries what was written after it, and body is the structured
block it applies to. Regions nest exactly as the directives do, so
!$omp parallel containing !$omp do is an OMPRegion of type Parallel
whose body holds an OMPRegion of type Do.
A directive that applies to no block, such as barrier or taskwait, is an
OMPRegion with an empty body.
One shape of this node is a contract the lowerings of a parallel loop read:
the canonical parallel loop the parallel_canonicalize pass produces. It is a
single region of type ParallelDo, carrying
OMPIndependent, whose clauses are the data
environment of the whole construct and whose body is one perfectly nested
DoLoop nest, as deep as collapse says. No target, teams or
distribute wrapper survives it; a region that was one carries
OMPTargetRequested instead. Every
parallel loop reaches the offload pass and the OpenMP pass in this one shape,
whether it was written as do concurrent, as an !$omp target region or as
an !$omp parallel do.
Ejemplos¶
An ASR text document that uses it:
(TranslationUnit
:symtab (SymbolTable
:id 0
:symbols {
"main" (Program
:symtab (SymbolTable
:id 1
:symbols {
"a" (Variable
:parent_symtab 1
:name "a"
:dependencies []
:intent :Local
:symbolic_value nil
:value nil
:storage :Default
:type (Array
:type (Integer
:kind 4
)
:dims [
(dimension
:start (IntegerConstant
:n 1
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
:length (IntegerConstant
:n 3
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
)
]
:physical_type :FixedSizeArray
:memory_space :Global
)
:type_declaration nil
:abi :Source
:access :Public
:presence :Required
:value_attr false
:target_attr false
:contiguous_attr false
:bindc_name nil
:is_volatile false
:is_protected false
:pass_attr :NotMethod
:self_argument nil
:codims []
)
"i" (Variable
:parent_symtab 1
:name "i"
:dependencies []
:intent :Local
:symbolic_value nil
:value nil
:storage :Default
:type (Integer
:kind 4
)
:type_declaration nil
:abi :Source
:access :Public
:presence :Required
:value_attr false
:target_attr false
:contiguous_attr false
:bindc_name nil
:is_volatile false
:is_protected false
:pass_attr :NotMethod
:self_argument nil
:codims []
)
"n" (Variable
:parent_symtab 1
:name "n"
:dependencies []
:intent :Local
:symbolic_value nil
:value nil
:storage :Default
:type (Integer
:kind 4
)
:type_declaration nil
:abi :Source
:access :Public
:presence :Required
:value_attr false
:target_attr false
:contiguous_attr false
:bindc_name nil
:is_volatile false
:is_protected false
:pass_attr :NotMethod
:self_argument nil
:codims []
)
"run" (Variable
:parent_symtab 1
:name "run"
:dependencies []
:intent :Local
:symbolic_value nil
:value nil
:storage :Default
:type (Logical
:kind 4
)
:type_declaration nil
:abi :Source
:access :Public
:presence :Required
:value_attr false
:target_attr false
:contiguous_attr false
:bindc_name nil
:is_volatile false
:is_protected false
:pass_attr :NotMethod
:self_argument nil
:codims []
)
"total" (Variable
:parent_symtab 1
:name "total"
:dependencies []
:intent :Local
:symbolic_value nil
:value nil
:storage :Default
:type (Integer
:kind 4
)
:type_declaration nil
:abi :Source
:access :Public
:presence :Required
:value_attr false
:target_attr false
:contiguous_attr false
:bindc_name nil
:is_volatile false
:is_protected false
:pass_attr :NotMethod
:self_argument nil
:codims []
)
}
)
:name "main"
:dependencies []
:body [
(OMPRegion
:region :Parallel
:clauses [
(OMPPrivate
:vars [
(Var
:v (SymbolRef 1 "i")
)
]
)
(OMPShared
:vars [
(Var
:v (SymbolRef 1 "a")
)
]
)
(OMPFirstPrivate
:vars [
(Var
:v (SymbolRef 1 "n")
)
]
)
(OMPNumThreads
:num_threads (IntegerConstant
:n 4
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
)
(OMPIf
:condition (Var
:v (SymbolRef 1 "run")
)
)
]
:body [
(OMPRegion
:region :Do
:clauses [
(OMPSchedule
:kind :Static
:chunk_size (IntegerConstant
:n 1
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
)
(OMPCollapse
:count (IntegerConstant
:n 1
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
)
(OMPReduction
:operator :ReduceAdd
:vars [
(Var
:v (SymbolRef 1 "total")
)
]
)
(OMPLastPrivate
:vars [
(Var
:v (SymbolRef 1 "i")
)
]
)
(OMPNowait)
]
:body [
(DoLoop
:name nil
:head (do_loop_head
:v (Var
:v (SymbolRef 1 "i")
)
:start (IntegerConstant
:n 1
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
:end (IntegerConstant
:n 3
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
:increment (IntegerConstant
:n 1
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
)
:body [
(Assignment
:target (Var
:v (SymbolRef 1 "total")
)
:value (IntegerBinOp
:left (Var
:v (SymbolRef 1 "total")
)
:op :Add
:right (Var
:v (SymbolRef 1 "i")
)
:type (Integer
:kind 4
)
:value nil
)
:overloaded nil
:realloc_lhs false
:move_allocation false
)
]
:orelse []
)
]
:exec_target :ExecAuto
)
]
:exec_target :ExecAuto
)
(OMPRegion
:region :Target
:clauses [
(OMPMap
:type :ToFrom
:vars [
(Var
:v (SymbolRef 1 "a")
)
]
)
(OMPDevice
:device (IntegerConstant
:n 0
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
)
]
:body [
(OMPRegion
:region :Teams
:clauses [
(OMPNumTeams
:num_teams (IntegerConstant
:n 2
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
)
(OMPThreadLimit
:thread_limit (IntegerConstant
:n 64
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
)
]
:body [
(Assignment
:target (Var
:v (SymbolRef 1 "total")
)
:value (IntegerConstant
:n 0
:type (Integer
:kind 4
)
:intboz_type :Decimal
)
:overloaded nil
:realloc_lhs false
:move_allocation false
)
]
:exec_target :ExecAuto
)
]
:exec_target :ExecAuto
)
]
)
}
)
:items []
)