[flang-commits] [flang] [mlir] [WIP] Delayed privatization. (PR #79862)
Kareem Ergawy via flang-commits
flang-commits at lists.llvm.org
Tue Jan 30 03:18:12 PST 2024
https://github.com/ergawy updated https://github.com/llvm/llvm-project/pull/79862
>From f2165b004791619c556c5e4ddf8e2744bb48a9d7 Mon Sep 17 00:00:00 2001
From: ergawy <kareem.ergawy at amd.com>
Date: Mon, 29 Jan 2024 04:45:18 -0600
Subject: [PATCH 1/3] [WIP] Delayed privatization.
This is a PoC for delayed privatization in OpenMP. Instead of directly
emitting privatization code in the frontend, we add a new op to outline
the privatization logic for a symbol and call-like mapping that maps
from the host symbol to a block argument in the OpenMP region.
Example:
```
!$omp target private(x)
!$end omp target
```
Would be code-generated by flang as:
```
func.func @foo() {
omp.target x.privatizer %x -> %argx: !fir.ref<i32> {
bb0(%argx: !fir.ref<i32>):
// ... use %argx ....
}
}
"omp.private"() <{function_type = (!fir.ref<i32>) -> !fir.ref<i32>, sym_name = "x.privatizer"}> ({
^bb0(%arg0: !fir.ref<i32>):
%0 = fir.alloca i32 {bindc_name = "x", pinned, uniq_name = "_QFprivate_clause_allocatableEx"}
%1 = fir.load %arg0 : !fir.ref<i32>
fir.store %1 to %0 : !fir.ref<i32>
omp.yield(%0 : !fir.ref<i32>)
}) : () -> ()
```
Later, we would inline the delayed privatizer function-like op in the
OpenMP region to basically get the same code generated directly by the
fronend at the moment.
So far this PoC implements the following:
- Adds the delayed privatization op: `omp.private`.
- For simple symbols, emits the op.
Still TODO:
- Extend the `omp.target` op to somehow model the oulined privatization
logic.
- Inline the outlined privatizer before emitting LLVM IR.
- Support more complex symbols like allocatables.
---
flang/include/flang/Lower/AbstractConverter.h | 18 ++--
flang/include/flang/Lower/SymbolMap.h | 1 +
flang/lib/Lower/Bridge.cpp | 54 +++++++-----
flang/lib/Lower/OpenMP.cpp | 83 +++++++++++++++----
.../OpenMP/FIR/delayed_privatization.f90 | 42 ++++++++++
mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td | 35 +++++++-
mlir/lib/Dialect/Func/IR/FuncOps.cpp | 4 +-
mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp | 13 +++
8 files changed, 204 insertions(+), 46 deletions(-)
create mode 100644 flang/test/Lower/OpenMP/FIR/delayed_privatization.f90
diff --git a/flang/include/flang/Lower/AbstractConverter.h b/flang/include/flang/Lower/AbstractConverter.h
index c19dcbdcdb39..b3ca804256ee 100644
--- a/flang/include/flang/Lower/AbstractConverter.h
+++ b/flang/include/flang/Lower/AbstractConverter.h
@@ -16,6 +16,7 @@
#include "flang/Common/Fortran.h"
#include "flang/Lower/LoweringOptions.h"
#include "flang/Lower/PFTDefs.h"
+#include "flang/Lower/SymbolMap.h"
#include "flang/Optimizer/Builder/BoxValue.h"
#include "flang/Semantics/symbol.h"
#include "mlir/IR/Builders.h"
@@ -92,7 +93,8 @@ class AbstractConverter {
/// Binds the symbol to an fir extended value. The symbol binding will be
/// added or replaced at the inner-most level of the local symbol map.
- virtual void bindSymbol(SymbolRef sym, const fir::ExtendedValue &exval) = 0;
+ virtual void bindSymbol(SymbolRef sym, const fir::ExtendedValue &exval,
+ Fortran::lower::SymMap *symMap = nullptr) = 0;
/// Override lowering of expression with pre-lowered values.
/// Associate mlir::Value to evaluate::Expr. All subsequent call to
@@ -111,14 +113,16 @@ class AbstractConverter {
/// For a given symbol which is host-associated, create a clone using
/// parameters from the host-associated symbol.
virtual bool
- createHostAssociateVarClone(const Fortran::semantics::Symbol &sym) = 0;
+ createHostAssociateVarClone(const Fortran::semantics::Symbol &sym,
+ Fortran::lower::SymMap *symMap = nullptr) = 0;
virtual void
createHostAssociateVarCloneDealloc(const Fortran::semantics::Symbol &sym) = 0;
- virtual void copyHostAssociateVar(
- const Fortran::semantics::Symbol &sym,
- mlir::OpBuilder::InsertPoint *copyAssignIP = nullptr) = 0;
+ virtual void
+ copyHostAssociateVar(const Fortran::semantics::Symbol &sym,
+ mlir::OpBuilder::InsertPoint *copyAssignIP = nullptr,
+ Fortran::lower::SymMap *symMap = nullptr) = 0;
/// For a given symbol, check if it is present in the inner-most
/// level of the symbol map.
@@ -295,6 +299,10 @@ class AbstractConverter {
return loweringOptions;
}
+ virtual Fortran::lower::SymbolBox
+ lookupOneLevelUpSymbol(const Fortran::semantics::Symbol &sym,
+ Fortran::lower::SymMap *symMap = nullptr) = 0;
+
private:
/// Options controlling lowering behavior.
const Fortran::lower::LoweringOptions &loweringOptions;
diff --git a/flang/include/flang/Lower/SymbolMap.h b/flang/include/flang/Lower/SymbolMap.h
index a55e4b133fe0..1031b479eb61 100644
--- a/flang/include/flang/Lower/SymbolMap.h
+++ b/flang/include/flang/Lower/SymbolMap.h
@@ -101,6 +101,7 @@ struct SymbolBox : public fir::details::matcher<SymbolBox> {
[](const fir::FortranVariableOpInterface &x) {
return fir::FortranVariableOpInterface(x).getBase();
},
+ [](const fir::MutableBoxValue &x) { return x.getAddr(); },
[](const auto &x) { return x.getAddr(); });
}
diff --git a/flang/lib/Lower/Bridge.cpp b/flang/lib/Lower/Bridge.cpp
index c3a14125bba8..eaa8eaeae84a 100644
--- a/flang/lib/Lower/Bridge.cpp
+++ b/flang/lib/Lower/Bridge.cpp
@@ -498,16 +498,18 @@ class FirConverter : public Fortran::lower::AbstractConverter {
/// Add the symbol binding to the inner-most level of the symbol map and
/// return true if it is not already present. Otherwise, return false.
bool bindIfNewSymbol(Fortran::lower::SymbolRef sym,
- const fir::ExtendedValue &exval) {
- if (shallowLookupSymbol(sym))
+ const fir::ExtendedValue &exval,
+ Fortran::lower::SymMap *symMap = nullptr) {
+ if (shallowLookupSymbol(sym, symMap))
return false;
- bindSymbol(sym, exval);
+ bindSymbol(sym, exval, symMap);
return true;
}
void bindSymbol(Fortran::lower::SymbolRef sym,
- const fir::ExtendedValue &exval) override final {
- addSymbol(sym, exval, /*forced=*/true);
+ const fir::ExtendedValue &exval,
+ Fortran::lower::SymMap *symMap = nullptr) override final {
+ addSymbol(sym, exval, /*forced=*/true, symMap);
}
void
@@ -610,14 +612,15 @@ class FirConverter : public Fortran::lower::AbstractConverter {
}
bool createHostAssociateVarClone(
- const Fortran::semantics::Symbol &sym) override final {
+ const Fortran::semantics::Symbol &sym,
+ Fortran::lower::SymMap *symMap = nullptr) override final {
mlir::Location loc = genLocation(sym.name());
mlir::Type symType = genType(sym);
const auto *details = sym.detailsIf<Fortran::semantics::HostAssocDetails>();
assert(details && "No host-association found");
const Fortran::semantics::Symbol &hsym = details->symbol();
mlir::Type hSymType = genType(hsym);
- Fortran::lower::SymbolBox hsb = lookupSymbol(hsym);
+ Fortran::lower::SymbolBox hsb = lookupSymbol(hsym, symMap);
auto allocate = [&](llvm::ArrayRef<mlir::Value> shape,
llvm::ArrayRef<mlir::Value> typeParams) -> mlir::Value {
@@ -720,7 +723,7 @@ class FirConverter : public Fortran::lower::AbstractConverter {
// Do nothing
});
- return bindIfNewSymbol(sym, exv);
+ return bindIfNewSymbol(sym, exv, symMap);
}
void createHostAssociateVarCloneDealloc(
@@ -745,16 +748,17 @@ class FirConverter : public Fortran::lower::AbstractConverter {
void copyHostAssociateVar(
const Fortran::semantics::Symbol &sym,
- mlir::OpBuilder::InsertPoint *copyAssignIP = nullptr) override final {
+ mlir::OpBuilder::InsertPoint *copyAssignIP = nullptr,
+ Fortran::lower::SymMap *symMap = nullptr) override final {
// 1) Fetch the original copy of the variable.
assert(sym.has<Fortran::semantics::HostAssocDetails>() &&
"No host-association found");
const Fortran::semantics::Symbol &hsym = sym.GetUltimate();
- Fortran::lower::SymbolBox hsb = lookupOneLevelUpSymbol(hsym);
+ Fortran::lower::SymbolBox hsb = lookupOneLevelUpSymbol(hsym, symMap);
assert(hsb && "Host symbol box not found");
// 2) Fetch the copied one that will mask the original.
- Fortran::lower::SymbolBox sb = shallowLookupSymbol(sym);
+ Fortran::lower::SymbolBox sb = shallowLookupSymbol(sym, symMap);
assert(sb && "Host-associated symbol box not found");
assert(hsb.getAddr() != sb.getAddr() &&
"Host and associated symbol boxes are the same");
@@ -763,8 +767,9 @@ class FirConverter : public Fortran::lower::AbstractConverter {
mlir::OpBuilder::InsertPoint insPt = builder->saveInsertionPoint();
if (copyAssignIP && copyAssignIP->isSet())
builder->restoreInsertionPoint(*copyAssignIP);
- else
+ else {
builder->setInsertionPointAfter(sb.getAddr().getDefiningOp());
+ }
Fortran::lower::SymbolBox *lhs_sb, *rhs_sb;
if (copyAssignIP && copyAssignIP->isSet() &&
@@ -1060,8 +1065,10 @@ class FirConverter : public Fortran::lower::AbstractConverter {
/// Find the symbol in the inner-most level of the local map or return null.
Fortran::lower::SymbolBox
- shallowLookupSymbol(const Fortran::semantics::Symbol &sym) {
- if (Fortran::lower::SymbolBox v = localSymbols.shallowLookupSymbol(sym))
+ shallowLookupSymbol(const Fortran::semantics::Symbol &sym,
+ Fortran::lower::SymMap *symMap = nullptr) {
+ auto &map = (symMap == nullptr ? localSymbols : *symMap);
+ if (Fortran::lower::SymbolBox v = map.shallowLookupSymbol(sym))
return v;
return {};
}
@@ -1069,8 +1076,10 @@ class FirConverter : public Fortran::lower::AbstractConverter {
/// Find the symbol in one level up of symbol map such as for host-association
/// in OpenMP code or return null.
Fortran::lower::SymbolBox
- lookupOneLevelUpSymbol(const Fortran::semantics::Symbol &sym) {
- if (Fortran::lower::SymbolBox v = localSymbols.lookupOneLevelUpSymbol(sym))
+ lookupOneLevelUpSymbol(const Fortran::semantics::Symbol &sym,
+ Fortran::lower::SymMap *symMap = nullptr) override {
+ auto &map = (symMap == nullptr ? localSymbols : *symMap);
+ if (Fortran::lower::SymbolBox v = map.lookupOneLevelUpSymbol(sym))
return v;
return {};
}
@@ -1079,15 +1088,16 @@ class FirConverter : public Fortran::lower::AbstractConverter {
/// already in the map and \p forced is `false`, the map is not updated.
/// Instead the value `false` is returned.
bool addSymbol(const Fortran::semantics::SymbolRef sym,
- fir::ExtendedValue val, bool forced = false) {
- if (!forced && lookupSymbol(sym))
+ fir::ExtendedValue val, bool forced = false,
+ Fortran::lower::SymMap *symMap = nullptr) {
+ auto &map = (symMap == nullptr ? localSymbols : *symMap);
+ if (!forced && lookupSymbol(sym, &map))
return false;
if (lowerToHighLevelFIR()) {
- Fortran::lower::genDeclareSymbol(*this, localSymbols, sym, val,
- fir::FortranVariableFlagsEnum::None,
- forced);
+ Fortran::lower::genDeclareSymbol(
+ *this, map, sym, val, fir::FortranVariableFlagsEnum::None, forced);
} else {
- localSymbols.addSymbol(sym, val, forced);
+ map.addSymbol(sym, val, forced);
}
return true;
}
diff --git a/flang/lib/Lower/OpenMP.cpp b/flang/lib/Lower/OpenMP.cpp
index be2117efbabc..93a696020d3e 100644
--- a/flang/lib/Lower/OpenMP.cpp
+++ b/flang/lib/Lower/OpenMP.cpp
@@ -169,12 +169,15 @@ class DataSharingProcessor {
void collectSymbolsForPrivatization();
void insertBarrier();
void collectDefaultSymbols();
- void privatize();
+ void
+ privatize(llvm::SetVector<mlir::omp::PrivateClauseOp> *privateInitializers);
void defaultPrivatize();
void copyLastPrivatize(mlir::Operation *op);
void insertLastPrivateCompare(mlir::Operation *op);
- void cloneSymbol(const Fortran::semantics::Symbol *sym);
- void copyFirstPrivateSymbol(const Fortran::semantics::Symbol *sym);
+ void cloneSymbol(const Fortran::semantics::Symbol *sym,
+ Fortran::lower::SymMap *symMap = nullptr);
+ void copyFirstPrivateSymbol(const Fortran::semantics::Symbol *sym,
+ Fortran::lower::SymMap *symMap);
void copyLastPrivateSymbol(const Fortran::semantics::Symbol *sym,
mlir::OpBuilder::InsertPoint *lastPrivIP);
void insertDeallocs();
@@ -197,7 +200,8 @@ class DataSharingProcessor {
// Step2 performs the copying for lastprivates and requires knowledge of the
// MLIR operation to insert the last private update. Step2 adds
// dealocation code as well.
- void processStep1();
+ void processStep1(llvm::SetVector<mlir::omp::PrivateClauseOp>
+ *privateInitializers = nullptr);
void processStep2(mlir::Operation *op, bool isLoop);
void setLoopIV(mlir::Value iv) {
@@ -206,10 +210,11 @@ class DataSharingProcessor {
}
};
-void DataSharingProcessor::processStep1() {
+void DataSharingProcessor::processStep1(
+ llvm::SetVector<mlir::omp::PrivateClauseOp> *privateInitializers) {
collectSymbolsForPrivatization();
collectDefaultSymbols();
- privatize();
+ privatize(privateInitializers);
defaultPrivatize();
insertBarrier();
}
@@ -239,20 +244,23 @@ void DataSharingProcessor::insertDeallocs() {
}
}
-void DataSharingProcessor::cloneSymbol(const Fortran::semantics::Symbol *sym) {
+void DataSharingProcessor::cloneSymbol(const Fortran::semantics::Symbol *sym,
+ Fortran::lower::SymMap *symMap) {
// Privatization for symbols which are pre-determined (like loop index
// variables) happen separately, for everything else privatize here.
if (sym->test(Fortran::semantics::Symbol::Flag::OmpPreDetermined))
return;
- bool success = converter.createHostAssociateVarClone(*sym);
+ bool success = converter.createHostAssociateVarClone(*sym, symMap);
(void)success;
assert(success && "Privatization failed due to existing binding");
}
void DataSharingProcessor::copyFirstPrivateSymbol(
- const Fortran::semantics::Symbol *sym) {
- if (sym->test(Fortran::semantics::Symbol::Flag::OmpFirstPrivate))
- converter.copyHostAssociateVar(*sym);
+ const Fortran::semantics::Symbol *sym,
+ Fortran::lower::SymMap *symMap = nullptr) {
+ if (sym->test(Fortran::semantics::Symbol::Flag::OmpFirstPrivate)) {
+ converter.copyHostAssociateVar(*sym, nullptr, symMap);
+ }
}
void DataSharingProcessor::copyLastPrivateSymbol(
@@ -487,8 +495,11 @@ void DataSharingProcessor::collectDefaultSymbols() {
}
}
-void DataSharingProcessor::privatize() {
+void DataSharingProcessor::privatize(
+ llvm::SetVector<mlir::omp::PrivateClauseOp> *privateInitializers) {
+
for (const Fortran::semantics::Symbol *sym : privatizedSymbols) {
+
if (const auto *commonDet =
sym->detailsIf<Fortran::semantics::CommonBlockDetails>()) {
for (const auto &mem : commonDet->objects()) {
@@ -496,6 +507,42 @@ void DataSharingProcessor::privatize() {
copyFirstPrivateSymbol(&*mem);
}
} else {
+ if (privateInitializers != nullptr) {
+ auto ip = firOpBuilder.saveInsertionPoint();
+
+ auto moduleOp = firOpBuilder.getInsertionBlock()
+ ->getParentOp()
+ ->getParentOfType<mlir::ModuleOp>();
+
+ firOpBuilder.setInsertionPoint(&moduleOp.getBodyRegion().front(),
+ moduleOp.getBodyRegion().front().end());
+
+ Fortran::lower::SymbolBox hsb = converter.lookupOneLevelUpSymbol(*sym);
+ assert(hsb && "Host symbol box not found");
+
+ auto privatizerOp = firOpBuilder.create<mlir::omp::PrivateClauseOp>(
+ hsb.getAddr().getLoc(), hsb.getAddr().getType(),
+ sym->name().ToString());
+ firOpBuilder.setInsertionPointToEnd(&privatizerOp.getBody().front());
+
+ Fortran::semantics::Symbol cp = *sym;
+ Fortran::lower::SymMap privatizerSymbolMap;
+ privatizerSymbolMap.addSymbol(cp, privatizerOp.getArgument(0));
+ privatizerSymbolMap.pushScope();
+
+ cloneSymbol(&cp, &privatizerSymbolMap);
+ copyFirstPrivateSymbol(&cp, &privatizerSymbolMap);
+
+ firOpBuilder.create<mlir::omp::YieldOp>(
+ hsb.getAddr().getLoc(),
+ privatizerSymbolMap.shallowLookupSymbol(cp).getAddr());
+
+ firOpBuilder.restoreInsertionPoint(ip);
+ }
+
+ // TODO: This will eventually be an else to the `if` above it. For now, I
+ // emit both the outlined privatizer AND directly emitted cloning and
+ // copying ops while I am testing.
cloneSymbol(sym);
copyFirstPrivateSymbol(sym);
}
@@ -2272,6 +2319,7 @@ static void createBodyOfOp(
llvm::SmallVector<mlir::Type> tiv(args.size(), loopVarType);
llvm::SmallVector<mlir::Location> locs(args.size(), loc);
firOpBuilder.createBlock(&op.getRegion(), {}, tiv, locs);
+
// The argument is not currently in memory, so make a temporary for the
// argument, and store it there, then bind that location to the argument.
mlir::Operation *storeOp = nullptr;
@@ -2291,10 +2339,11 @@ static void createBodyOfOp(
// If it is an unstructured region and is not the outer region of a combined
// construct, create empty blocks for all evaluations.
- if (eval.lowerAsUnstructured() && !outerCombined)
+ if (eval.lowerAsUnstructured() && !outerCombined) {
Fortran::lower::createEmptyRegionBlocks<mlir::omp::TerminatorOp,
mlir::omp::YieldOp>(
firOpBuilder, eval.getNestedEvaluations());
+ }
// Start with privatization, so that the lowering of the nested
// code will use the right symbols.
@@ -2307,12 +2356,14 @@ static void createBodyOfOp(
if (privatize) {
if (!dsp) {
tempDsp.emplace(converter, *clauses, eval);
- tempDsp->processStep1();
+ llvm::SetVector<mlir::omp::PrivateClauseOp> privateInitializers;
+ tempDsp->processStep1(&privateInitializers);
}
}
if constexpr (std::is_same_v<Op, mlir::omp::ParallelOp>) {
threadPrivatizeVars(converter, eval);
+
if (clauses) {
firOpBuilder.setInsertionPoint(marker);
ClauseProcessor(converter, *clauses).processCopyin();
@@ -2361,6 +2412,7 @@ static void createBodyOfOp(
if (exits.size() == 1)
return exits[0];
mlir::Block *exit = firOpBuilder.createBlock(®ion);
+
for (mlir::Block *b : exits) {
firOpBuilder.setInsertionPointToEnd(b);
firOpBuilder.create<mlir::cf::BranchOp>(loc, exit);
@@ -2382,8 +2434,9 @@ static void createBodyOfOp(
assert(tempDsp.has_value());
tempDsp->processStep2(op, isLoop);
} else {
- if (isLoop && args.size() > 0)
+ if (isLoop && args.size() > 0) {
dsp->setLoopIV(converter.getSymbolAddress(*args[0]));
+ }
dsp->processStep2(op, isLoop);
}
}
diff --git a/flang/test/Lower/OpenMP/FIR/delayed_privatization.f90 b/flang/test/Lower/OpenMP/FIR/delayed_privatization.f90
new file mode 100644
index 000000000000..7b4d9135c6e0
--- /dev/null
+++ b/flang/test/Lower/OpenMP/FIR/delayed_privatization.f90
@@ -0,0 +1,42 @@
+subroutine private_clause_allocatable()
+ integer :: xxx
+ integer :: yyy
+
+!$OMP PARALLEL FIRSTPRIVATE(xxx, yyy)
+!$OMP END PARALLEL
+
+end subroutine
+
+! This is what flang emits with the PoC:
+! --------------------------------------
+!
+!func.func @_QPprivate_clause_allocatable() {
+! %0 = fir.alloca i32 {bindc_name = "xxx", uniq_name = "_QFprivate_clause_allocatableExxx"}
+! %1 = fir.alloca i32 {bindc_name = "yyy", uniq_name = "_QFprivate_clause_allocatableEyyy"}
+! omp.parallel {
+! %2 = fir.alloca i32 {bindc_name = "xxx", pinned, uniq_name = "_QFprivate_clause_allocatableExxx"}
+! %3 = fir.load %0 : !fir.ref<i32>
+! fir.store %3 to %2 : !fir.ref<i32>
+! %4 = fir.alloca i32 {bindc_name = "yyy", pinned, uniq_name = "_QFprivate_clause_allocatableEyyy"}
+! %5 = fir.load %1 : !fir.ref<i32>
+! fir.store %5 to %4 : !fir.ref<i32>
+! omp.terminator
+! }
+! return
+!}
+!
+!"omp.private"() <{function_type = (!fir.ref<i32>) -> !fir.ref<i32>, sym_name = "xxx.privatizer"}> ({
+!^bb0(%arg0: !fir.ref<i32>):
+! %0 = fir.alloca i32 {bindc_name = "xxx", pinned, uniq_name = "_QFprivate_clause_allocatableExxx"}
+! %1 = fir.load %arg0 : !fir.ref<i32>
+! fir.store %1 to %0 : !fir.ref<i32>
+! omp.yield(%0 : !fir.ref<i32>)
+!}) : () -> ()
+!
+!"omp.private"() <{function_type = (!fir.ref<i32>) -> !fir.ref<i32>, sym_name = "yyy.privatizer"}> ({
+!^bb0(%arg0: !fir.ref<i32>):
+! %0 = fir.alloca i32 {bindc_name = "yyy", pinned, uniq_name = "_QFprivate_clause_allocatableEyyy"}
+! %1 = fir.load %arg0 : !fir.ref<i32>
+! fir.store %1 to %0 : !fir.ref<i32>
+! omp.yield(%0 : !fir.ref<i32>)
+!}) : () -> ()
diff --git a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
index 96c15e775a30..4892b4c24afc 100644
--- a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
+++ b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
@@ -16,6 +16,7 @@
include "mlir/IR/EnumAttr.td"
include "mlir/IR/OpBase.td"
+include "mlir/Interfaces/FunctionInterfaces.td"
include "mlir/Interfaces/SideEffectInterfaces.td"
include "mlir/Interfaces/ControlFlowInterfaces.td"
include "mlir/IR/SymbolInterfaces.td"
@@ -621,7 +622,7 @@ def SimdLoopOp : OpenMP_Op<"simdloop", [AttrSizedOperandSegments,
def YieldOp : OpenMP_Op<"yield",
[Pure, ReturnLike, Terminator,
ParentOneOf<["WsLoopOp", "ReductionDeclareOp",
- "AtomicUpdateOp", "SimdLoopOp"]>]> {
+ "AtomicUpdateOp", "SimdLoopOp", "PrivateClauseOp"]>]> {
let summary = "loop yield and termination operation";
let description = [{
"omp.yield" yields SSA values from the OpenMP dialect op region and
@@ -1478,6 +1479,38 @@ def Target_UpdateDataOp: OpenMP_Op<"target_update_data",
//===----------------------------------------------------------------------===//
// 2.14.5 target construct
//===----------------------------------------------------------------------===//
+def PrivateClauseOp : OpenMP_Op<"private", [
+ IsolatedFromAbove, FunctionOpInterface
+ ]> {
+ let summary = "TODO";
+ let description = [{}];
+
+ let arguments = (ins SymbolNameAttr:$sym_name,
+ TypeAttrOf<FunctionType>:$function_type);
+
+ let regions = (region AnyRegion:$body);
+
+ let builders = [OpBuilder<(ins
+ "::mlir::Type":$privateVar,
+ "::llvm::StringRef":$privateVarName
+ )>];
+
+ let extraClassDeclaration = [{
+ ::mlir::Region *getCallableRegion() {
+ return &getBody();
+ }
+
+ /// Returns the argument types of this function.
+ ArrayRef<Type> getArgumentTypes() {
+ return getFunctionType().getInputs();
+ }
+
+ /// Returns the result types of this function.
+ ArrayRef<Type> getResultTypes() {
+ return getFunctionType().getResults();
+ }
+ }];
+}
def TargetOp : OpenMP_Op<"target",[IsolatedFromAbove, OutlineableOpenMPOpInterface, AttrSizedOperandSegments]> {
let summary = "target construct";
diff --git a/mlir/lib/Dialect/Func/IR/FuncOps.cpp b/mlir/lib/Dialect/Func/IR/FuncOps.cpp
index d18ec279e85c..5cfa8c790bbe 100644
--- a/mlir/lib/Dialect/Func/IR/FuncOps.cpp
+++ b/mlir/lib/Dialect/Func/IR/FuncOps.cpp
@@ -138,9 +138,7 @@ LogicalResult ConstantOp::verify() {
return success();
}
-OpFoldResult ConstantOp::fold(FoldAdaptor adaptor) {
- return getValueAttr();
-}
+OpFoldResult ConstantOp::fold(FoldAdaptor adaptor) { return getValueAttr(); }
void ConstantOp::getAsmResultNames(
function_ref<void(Value, StringRef)> setNameFn) {
diff --git a/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp b/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
index 13cc16125a27..d8a4a9988683 100644
--- a/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
+++ b/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
@@ -1594,6 +1594,19 @@ LogicalResult DataBoundsOp::verify() {
return success();
}
+void PrivateClauseOp::build(OpBuilder &odsBuilder, OperationState &odsState,
+ Type privateVarType, StringRef privateVarName) {
+ FunctionType initializerType = FunctionType::get(
+ odsBuilder.getContext(), {privateVarType}, {privateVarType});
+ std::string privatizerName = (privateVarName + ".privatizer").str();
+
+ build(odsBuilder, odsState, privatizerName, initializerType);
+
+ mlir::Block &block = odsState.regions.front()->emplaceBlock();
+ block.addArguments({privateVarType},
+ SmallVector<Location>(1, odsState.location));
+}
+
#define GET_ATTRDEF_CLASSES
#include "mlir/Dialect/OpenMP/OpenMPOpsAttributes.cpp.inc"
>From aa72c74875fa09b004dcfed2f2d27f683bd41a19 Mon Sep 17 00:00:00 2001
From: ergawy <kareem.ergawy at amd.com>
Date: Tue, 30 Jan 2024 00:09:22 -0600
Subject: [PATCH 2/3] Modify the local symbol map in the converter.
---
flang/include/flang/Lower/AbstractConverter.h | 18 +++----
flang/lib/Lower/Bridge.cpp | 53 ++++++++-----------
flang/lib/Lower/OpenMP.cpp | 32 ++++++-----
3 files changed, 46 insertions(+), 57 deletions(-)
diff --git a/flang/include/flang/Lower/AbstractConverter.h b/flang/include/flang/Lower/AbstractConverter.h
index b3ca804256ee..df200c72c4ae 100644
--- a/flang/include/flang/Lower/AbstractConverter.h
+++ b/flang/include/flang/Lower/AbstractConverter.h
@@ -93,8 +93,7 @@ class AbstractConverter {
/// Binds the symbol to an fir extended value. The symbol binding will be
/// added or replaced at the inner-most level of the local symbol map.
- virtual void bindSymbol(SymbolRef sym, const fir::ExtendedValue &exval,
- Fortran::lower::SymMap *symMap = nullptr) = 0;
+ virtual void bindSymbol(SymbolRef sym, const fir::ExtendedValue &exval) = 0;
/// Override lowering of expression with pre-lowered values.
/// Associate mlir::Value to evaluate::Expr. All subsequent call to
@@ -113,16 +112,14 @@ class AbstractConverter {
/// For a given symbol which is host-associated, create a clone using
/// parameters from the host-associated symbol.
virtual bool
- createHostAssociateVarClone(const Fortran::semantics::Symbol &sym,
- Fortran::lower::SymMap *symMap = nullptr) = 0;
+ createHostAssociateVarClone(const Fortran::semantics::Symbol &sym) = 0;
virtual void
createHostAssociateVarCloneDealloc(const Fortran::semantics::Symbol &sym) = 0;
- virtual void
- copyHostAssociateVar(const Fortran::semantics::Symbol &sym,
- mlir::OpBuilder::InsertPoint *copyAssignIP = nullptr,
- Fortran::lower::SymMap *symMap = nullptr) = 0;
+ virtual void copyHostAssociateVar(
+ const Fortran::semantics::Symbol &sym,
+ mlir::OpBuilder::InsertPoint *copyAssignIP = nullptr) = 0;
/// For a given symbol, check if it is present in the inner-most
/// level of the symbol map.
@@ -300,8 +297,9 @@ class AbstractConverter {
}
virtual Fortran::lower::SymbolBox
- lookupOneLevelUpSymbol(const Fortran::semantics::Symbol &sym,
- Fortran::lower::SymMap *symMap = nullptr) = 0;
+ lookupOneLevelUpSymbol(const Fortran::semantics::Symbol &sym) = 0;
+
+ virtual Fortran::lower::SymMap *getLocalSymbols() { return nullptr; }
private:
/// Options controlling lowering behavior.
diff --git a/flang/lib/Lower/Bridge.cpp b/flang/lib/Lower/Bridge.cpp
index eaa8eaeae84a..1e47f6d1a13d 100644
--- a/flang/lib/Lower/Bridge.cpp
+++ b/flang/lib/Lower/Bridge.cpp
@@ -498,18 +498,16 @@ class FirConverter : public Fortran::lower::AbstractConverter {
/// Add the symbol binding to the inner-most level of the symbol map and
/// return true if it is not already present. Otherwise, return false.
bool bindIfNewSymbol(Fortran::lower::SymbolRef sym,
- const fir::ExtendedValue &exval,
- Fortran::lower::SymMap *symMap = nullptr) {
- if (shallowLookupSymbol(sym, symMap))
+ const fir::ExtendedValue &exval) {
+ if (shallowLookupSymbol(sym))
return false;
- bindSymbol(sym, exval, symMap);
+ bindSymbol(sym, exval);
return true;
}
void bindSymbol(Fortran::lower::SymbolRef sym,
- const fir::ExtendedValue &exval,
- Fortran::lower::SymMap *symMap = nullptr) override final {
- addSymbol(sym, exval, /*forced=*/true, symMap);
+ const fir::ExtendedValue &exval) override final {
+ addSymbol(sym, exval, /*forced=*/true);
}
void
@@ -612,15 +610,14 @@ class FirConverter : public Fortran::lower::AbstractConverter {
}
bool createHostAssociateVarClone(
- const Fortran::semantics::Symbol &sym,
- Fortran::lower::SymMap *symMap = nullptr) override final {
+ const Fortran::semantics::Symbol &sym) override final {
mlir::Location loc = genLocation(sym.name());
mlir::Type symType = genType(sym);
const auto *details = sym.detailsIf<Fortran::semantics::HostAssocDetails>();
assert(details && "No host-association found");
const Fortran::semantics::Symbol &hsym = details->symbol();
mlir::Type hSymType = genType(hsym);
- Fortran::lower::SymbolBox hsb = lookupSymbol(hsym, symMap);
+ Fortran::lower::SymbolBox hsb = lookupSymbol(hsym);
auto allocate = [&](llvm::ArrayRef<mlir::Value> shape,
llvm::ArrayRef<mlir::Value> typeParams) -> mlir::Value {
@@ -723,7 +720,7 @@ class FirConverter : public Fortran::lower::AbstractConverter {
// Do nothing
});
- return bindIfNewSymbol(sym, exv, symMap);
+ return bindIfNewSymbol(sym, exv);
}
void createHostAssociateVarCloneDealloc(
@@ -748,17 +745,16 @@ class FirConverter : public Fortran::lower::AbstractConverter {
void copyHostAssociateVar(
const Fortran::semantics::Symbol &sym,
- mlir::OpBuilder::InsertPoint *copyAssignIP = nullptr,
- Fortran::lower::SymMap *symMap = nullptr) override final {
+ mlir::OpBuilder::InsertPoint *copyAssignIP = nullptr) override final {
// 1) Fetch the original copy of the variable.
assert(sym.has<Fortran::semantics::HostAssocDetails>() &&
"No host-association found");
const Fortran::semantics::Symbol &hsym = sym.GetUltimate();
- Fortran::lower::SymbolBox hsb = lookupOneLevelUpSymbol(hsym, symMap);
+ Fortran::lower::SymbolBox hsb = lookupOneLevelUpSymbol(hsym);
assert(hsb && "Host symbol box not found");
// 2) Fetch the copied one that will mask the original.
- Fortran::lower::SymbolBox sb = shallowLookupSymbol(sym, symMap);
+ Fortran::lower::SymbolBox sb = shallowLookupSymbol(sym);
assert(sb && "Host-associated symbol box not found");
assert(hsb.getAddr() != sb.getAddr() &&
"Host and associated symbol boxes are the same");
@@ -998,6 +994,8 @@ class FirConverter : public Fortran::lower::AbstractConverter {
return name;
}
+ Fortran::lower::SymMap *getLocalSymbols() override { return &localSymbols; }
+
private:
FirConverter() = delete;
FirConverter(const FirConverter &) = delete;
@@ -1065,10 +1063,8 @@ class FirConverter : public Fortran::lower::AbstractConverter {
/// Find the symbol in the inner-most level of the local map or return null.
Fortran::lower::SymbolBox
- shallowLookupSymbol(const Fortran::semantics::Symbol &sym,
- Fortran::lower::SymMap *symMap = nullptr) {
- auto &map = (symMap == nullptr ? localSymbols : *symMap);
- if (Fortran::lower::SymbolBox v = map.shallowLookupSymbol(sym))
+ shallowLookupSymbol(const Fortran::semantics::Symbol &sym) {
+ if (Fortran::lower::SymbolBox v = localSymbols.shallowLookupSymbol(sym))
return v;
return {};
}
@@ -1076,10 +1072,8 @@ class FirConverter : public Fortran::lower::AbstractConverter {
/// Find the symbol in one level up of symbol map such as for host-association
/// in OpenMP code or return null.
Fortran::lower::SymbolBox
- lookupOneLevelUpSymbol(const Fortran::semantics::Symbol &sym,
- Fortran::lower::SymMap *symMap = nullptr) override {
- auto &map = (symMap == nullptr ? localSymbols : *symMap);
- if (Fortran::lower::SymbolBox v = map.lookupOneLevelUpSymbol(sym))
+ lookupOneLevelUpSymbol(const Fortran::semantics::Symbol &sym) override {
+ if (Fortran::lower::SymbolBox v = localSymbols.lookupOneLevelUpSymbol(sym))
return v;
return {};
}
@@ -1088,16 +1082,15 @@ class FirConverter : public Fortran::lower::AbstractConverter {
/// already in the map and \p forced is `false`, the map is not updated.
/// Instead the value `false` is returned.
bool addSymbol(const Fortran::semantics::SymbolRef sym,
- fir::ExtendedValue val, bool forced = false,
- Fortran::lower::SymMap *symMap = nullptr) {
- auto &map = (symMap == nullptr ? localSymbols : *symMap);
- if (!forced && lookupSymbol(sym, &map))
+ fir::ExtendedValue val, bool forced = false) {
+ if (!forced && lookupSymbol(sym))
return false;
if (lowerToHighLevelFIR()) {
- Fortran::lower::genDeclareSymbol(
- *this, map, sym, val, fir::FortranVariableFlagsEnum::None, forced);
+ Fortran::lower::genDeclareSymbol(*this, localSymbols, sym, val,
+ fir::FortranVariableFlagsEnum::None,
+ forced);
} else {
- map.addSymbol(sym, val, forced);
+ localSymbols.addSymbol(sym, val, forced);
}
return true;
}
diff --git a/flang/lib/Lower/OpenMP.cpp b/flang/lib/Lower/OpenMP.cpp
index 93a696020d3e..953b5a6ffc9a 100644
--- a/flang/lib/Lower/OpenMP.cpp
+++ b/flang/lib/Lower/OpenMP.cpp
@@ -174,10 +174,8 @@ class DataSharingProcessor {
void defaultPrivatize();
void copyLastPrivatize(mlir::Operation *op);
void insertLastPrivateCompare(mlir::Operation *op);
- void cloneSymbol(const Fortran::semantics::Symbol *sym,
- Fortran::lower::SymMap *symMap = nullptr);
- void copyFirstPrivateSymbol(const Fortran::semantics::Symbol *sym,
- Fortran::lower::SymMap *symMap);
+ void cloneSymbol(const Fortran::semantics::Symbol *sym);
+ void copyFirstPrivateSymbol(const Fortran::semantics::Symbol *sym);
void copyLastPrivateSymbol(const Fortran::semantics::Symbol *sym,
mlir::OpBuilder::InsertPoint *lastPrivIP);
void insertDeallocs();
@@ -244,22 +242,20 @@ void DataSharingProcessor::insertDeallocs() {
}
}
-void DataSharingProcessor::cloneSymbol(const Fortran::semantics::Symbol *sym,
- Fortran::lower::SymMap *symMap) {
+void DataSharingProcessor::cloneSymbol(const Fortran::semantics::Symbol *sym) {
// Privatization for symbols which are pre-determined (like loop index
// variables) happen separately, for everything else privatize here.
if (sym->test(Fortran::semantics::Symbol::Flag::OmpPreDetermined))
return;
- bool success = converter.createHostAssociateVarClone(*sym, symMap);
+ bool success = converter.createHostAssociateVarClone(*sym);
(void)success;
assert(success && "Privatization failed due to existing binding");
}
void DataSharingProcessor::copyFirstPrivateSymbol(
- const Fortran::semantics::Symbol *sym,
- Fortran::lower::SymMap *symMap = nullptr) {
+ const Fortran::semantics::Symbol *sym) {
if (sym->test(Fortran::semantics::Symbol::Flag::OmpFirstPrivate)) {
- converter.copyHostAssociateVar(*sym, nullptr, symMap);
+ converter.copyHostAssociateVar(*sym, nullptr);
}
}
@@ -525,18 +521,20 @@ void DataSharingProcessor::privatize(
sym->name().ToString());
firOpBuilder.setInsertionPointToEnd(&privatizerOp.getBody().front());
- Fortran::semantics::Symbol cp = *sym;
- Fortran::lower::SymMap privatizerSymbolMap;
- privatizerSymbolMap.addSymbol(cp, privatizerOp.getArgument(0));
- privatizerSymbolMap.pushScope();
+ converter.getLocalSymbols()->pushScope();
+ converter.getLocalSymbols()->addSymbol(*sym,
+ privatizerOp.getArgument(0));
+ converter.getLocalSymbols()->pushScope();
- cloneSymbol(&cp, &privatizerSymbolMap);
- copyFirstPrivateSymbol(&cp, &privatizerSymbolMap);
+ cloneSymbol(sym);
+ copyFirstPrivateSymbol(sym);
firOpBuilder.create<mlir::omp::YieldOp>(
hsb.getAddr().getLoc(),
- privatizerSymbolMap.shallowLookupSymbol(cp).getAddr());
+ converter.getLocalSymbols()->shallowLookupSymbol(*sym).getAddr());
+ converter.getLocalSymbols()->popScope();
+ converter.getLocalSymbols()->popScope();
firOpBuilder.restoreInsertionPoint(ip);
}
>From 113dd3b475f583fdadf9e7c0864f6fa0761d43a7 Mon Sep 17 00:00:00 2001
From: ergawy <kareem.ergawy at amd.com>
Date: Tue, 30 Jan 2024 04:13:07 -0600
Subject: [PATCH 3/3] Add `private` clause to `paralle` op's definition.
---
flang/lib/Lower/OpenMP.cpp | 3 +-
mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td | 8 +-
.../Conversion/SCFToOpenMP/SCFToOpenMP.cpp | 4 +-
mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp | 83 ++++++++++++++++++-
mlir/test/Dialect/OpenMP/roundtrip.mlir | 38 +++++++++
5 files changed, 131 insertions(+), 5 deletions(-)
create mode 100644 mlir/test/Dialect/OpenMP/roundtrip.mlir
diff --git a/flang/lib/Lower/OpenMP.cpp b/flang/lib/Lower/OpenMP.cpp
index 953b5a6ffc9a..c254588d58c1 100644
--- a/flang/lib/Lower/OpenMP.cpp
+++ b/flang/lib/Lower/OpenMP.cpp
@@ -2572,11 +2572,12 @@ genParallelOp(Fortran::lower::AbstractConverter &converter,
/*resultTypes=*/mlir::TypeRange(), ifClauseOperand,
numThreadsClauseOperand, allocateOperands, allocatorOperands,
reductionVars,
+ /*private_vars=*/mlir::ValueRange(),
reductionDeclSymbols.empty()
? nullptr
: mlir::ArrayAttr::get(converter.getFirOpBuilder().getContext(),
reductionDeclSymbols),
- procBindKindAttr);
+ procBindKindAttr, /*private_inits*/ nullptr);
}
static mlir::omp::SectionOp
diff --git a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
index 4892b4c24afc..23e058d372c7 100644
--- a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
+++ b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
@@ -188,8 +188,10 @@ def ParallelOp : OpenMP_Op<"parallel", [
Variadic<AnyType>:$allocate_vars,
Variadic<AnyType>:$allocators_vars,
Variadic<OpenMP_PointerLikeType>:$reduction_vars,
+ Variadic<AnyType>:$private_vars,
OptionalAttr<SymbolRefArrayAttr>:$reductions,
- OptionalAttr<ProcBindKindAttr>:$proc_bind_val);
+ OptionalAttr<ProcBindKindAttr>:$proc_bind_val,
+ OptionalAttr<SymbolRefArrayAttr>:$private_inits);
let regions = (region AnyRegion:$region);
@@ -213,6 +215,10 @@ def ParallelOp : OpenMP_Op<"parallel", [
$allocators_vars, type($allocators_vars)
) `)`
| `proc_bind` `(` custom<ClauseAttr>($proc_bind_val) `)`
+ | `private` `(`
+ custom<PrivateVarList>(
+ $private_vars, type($private_vars), $private_inits
+ ) `)`
) $region attr-dict
}];
let hasVerifier = 1;
diff --git a/mlir/lib/Conversion/SCFToOpenMP/SCFToOpenMP.cpp b/mlir/lib/Conversion/SCFToOpenMP/SCFToOpenMP.cpp
index 2f8b3f7e11de..b381aaf20bf8 100644
--- a/mlir/lib/Conversion/SCFToOpenMP/SCFToOpenMP.cpp
+++ b/mlir/lib/Conversion/SCFToOpenMP/SCFToOpenMP.cpp
@@ -419,8 +419,10 @@ struct ParallelOpLowering : public OpRewritePattern<scf::ParallelOp> {
/* allocate_vars = */ llvm::SmallVector<Value>{},
/* allocators_vars = */ llvm::SmallVector<Value>{},
/* reduction_vars = */ llvm::SmallVector<Value>{},
+ /*private_vars=*/mlir::ValueRange{},
/* reductions = */ ArrayAttr{},
- /* proc_bind_val = */ omp::ClauseProcBindKindAttr{});
+ /* proc_bind_val = */ omp::ClauseProcBindKindAttr{},
+ /*private_inits*/ nullptr);
{
OpBuilder::InsertionGuard guard(rewriter);
diff --git a/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp b/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
index d8a4a9988683..e2d74494e52b 100644
--- a/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
+++ b/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
@@ -989,8 +989,9 @@ void ParallelOp::build(OpBuilder &builder, OperationState &state,
ParallelOp::build(
builder, state, /*if_expr_var=*/nullptr, /*num_threads_var=*/nullptr,
/*allocate_vars=*/ValueRange(), /*allocators_vars=*/ValueRange(),
- /*reduction_vars=*/ValueRange(), /*reductions=*/nullptr,
- /*proc_bind_val=*/nullptr);
+ /*reduction_vars=*/ValueRange(), /*private_vars=*/ValueRange(),
+ /*reductions=*/nullptr,
+ /*proc_bind_val=*/nullptr, /*private_inits*/ nullptr);
state.addAttributes(attributes);
}
@@ -1607,6 +1608,84 @@ void PrivateClauseOp::build(OpBuilder &odsBuilder, OperationState &odsState,
SmallVector<Location>(1, odsState.location));
}
+static ParseResult parsePrivateVarList(
+ OpAsmParser &parser,
+ llvm::SmallVector<OpAsmParser::UnresolvedOperand, 4> &privateVarsOperands,
+ llvm::SmallVector<Type, 1> &privateVarsTypes, ArrayAttr &privateInitsAttr) {
+ SymbolRefAttr privatizerSym;
+ OpAsmParser::UnresolvedOperand arg;
+ OpAsmParser::UnresolvedOperand blockArg;
+ Type argType;
+
+ SmallVector<SymbolRefAttr> privateInitsVec;
+
+ auto parsePrivatizers = [&]() -> ParseResult {
+ if (parser.parseAttribute(privatizerSym) || parser.parseOperand(arg) ||
+ parser.parseArrow() || parser.parseOperand(blockArg)) {
+ return failure();
+ }
+
+ privateInitsVec.push_back(privatizerSym);
+ privateVarsOperands.push_back(arg);
+ return success();
+ };
+
+ auto parseTypes = [&]() -> ParseResult {
+ if (parser.parseType(argType))
+ return failure();
+ privateVarsTypes.push_back(argType);
+ return success();
+ };
+
+ if (parser.parseCommaSeparatedList(parsePrivatizers))
+ return failure();
+
+ SmallVector<Attribute> privateInits(privateInitsVec.begin(),
+ privateInitsVec.end());
+ privateInitsAttr = ArrayAttr::get(parser.getContext(), privateInits);
+
+ if (parser.parseColon())
+ return failure();
+
+ if (parser.parseCommaSeparatedList(parseTypes))
+ return failure();
+
+ return success();
+}
+
+static void printPrivateVarList(OpAsmPrinter &printer, Operation *op,
+ OperandRange privateVars,
+ TypeRange privateVarTypes,
+ std::optional<ArrayAttr> privateInitsAttr) {
+ auto ®ion = op->getRegion(0);
+ unsigned argIndex = 0;
+ assert(privateVars.size() == privateVarTypes.size() &&
+ ((privateVars.empty()) ||
+ (*privateInitsAttr &&
+ (privateInitsAttr->size() == privateVars.size()))));
+
+ for (const auto &privateVar : privateVars) {
+ assert(privateInitsAttr);
+ const auto &blockArg = region.front().getArgument(argIndex);
+ const auto &privateInitSym = (*privateInitsAttr)[argIndex];
+ printer << privateInitSym << " " << privateVar << " -> " << blockArg;
+
+ argIndex++;
+ if (argIndex < privateVars.size())
+ printer << ", ";
+ }
+
+ printer << " : ";
+
+ argIndex = 0;
+ for (const auto &mapType : privateVarTypes) {
+ printer << mapType;
+ argIndex++;
+ if (argIndex < privateVarTypes.size())
+ printer << ", ";
+ }
+}
+
#define GET_ATTRDEF_CLASSES
#include "mlir/Dialect/OpenMP/OpenMPOpsAttributes.cpp.inc"
diff --git a/mlir/test/Dialect/OpenMP/roundtrip.mlir b/mlir/test/Dialect/OpenMP/roundtrip.mlir
new file mode 100644
index 000000000000..8cb04ef27268
--- /dev/null
+++ b/mlir/test/Dialect/OpenMP/roundtrip.mlir
@@ -0,0 +1,38 @@
+// RUN: fir-opt -verify-diagnostics %s | fir-opt | FileCheck %s
+
+// CHECK-LABEL: _QPprivate_clause
+func.func @_QPprivate_clause() {
+ %0 = fir.alloca i32 {bindc_name = "x", uniq_name = "_QFprivate_clause_allocatableEx"}
+ %1 = fir.alloca i32 {bindc_name = "y", uniq_name = "_QFprivate_clause_allocatableEy"}
+
+ // CHECK: omp.parallel private(@x.privatizer %0 -> %arg0, @y.privatizer %1 -> %arg1 : !fir.ref<i32>, !fir.ref<i32>)
+ omp.parallel private(@x.privatizer %0 -> %arg0, @y.privatizer %1 -> %arg1 : !fir.ref<i32>, !fir.ref<i32>) {
+ // CHECK: bb0(%arg0: {{.*}}, %arg1: {{.*}}):
+ ^bb0(%arg0 : !fir.ref<i32>, %arg1 : !fir.ref<i32>):
+ omp.terminator
+ }
+ return
+}
+
+// CHECK: "omp.private"() <{function_type = (!fir.ref<i32>) -> !fir.ref<i32>, sym_name = "x.privatizer"}> ({
+"omp.private"() <{function_type = (!fir.ref<i32>) -> !fir.ref<i32>, sym_name = "x.privatizer"}> ({
+// CHECK: ^bb0(%arg0: {{.*}}):
+^bb0(%arg0: !fir.ref<i32>):
+
+ // CHECK: %0 = fir.alloca i32 {bindc_name = "x", pinned, uniq_name = "_QFprivate_clause_allocatableEx"}
+ %0 = fir.alloca i32 {bindc_name = "x", pinned, uniq_name = "_QFprivate_clause_allocatableEx"}
+
+ // CHECK: omp.yield(%0 : !fir.ref<i32>)
+ omp.yield(%0 : !fir.ref<i32>)
+}) : () -> ()
+
+// CHECK: "omp.private"() <{function_type = (!fir.ref<i32>) -> !fir.ref<i32>, sym_name = "y.privatizer"}> ({
+"omp.private"() <{function_type = (!fir.ref<i32>) -> !fir.ref<i32>, sym_name = "y.privatizer"}> ({
+^bb0(%arg0: !fir.ref<i32>):
+
+ // CHECK: %0 = fir.alloca i32 {bindc_name = "y", pinned, uniq_name = "_QFprivate_clause_allocatableEy"}
+ %0 = fir.alloca i32 {bindc_name = "y", pinned, uniq_name = "_QFprivate_clause_allocatableEy"}
+
+ // CHECK: omp.yield(%0 : !fir.ref<i32>)
+ omp.yield(%0 : !fir.ref<i32>)
+}) : () -> ()
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