[Mlir-commits] [flang] [mlir] [flang][OpenMP][MLIR] Basic support for delayed privatization code-gen (PR #81833)
Kareem Ergawy
llvmlistbot at llvm.org
Thu Feb 15 00:46:57 PST 2024
https://github.com/ergawy updated https://github.com/llvm/llvm-project/pull/81833
>From 179819c189a438a8eedc1c782d4a1e3800994e98 Mon Sep 17 00:00:00 2001
From: ergawy <kareem.ergawy at amd.com>
Date: Sun, 11 Feb 2024 07:57:53 -0600
Subject: [PATCH 1/3] [MLIR][OpenMP] Support `llvm` conversion for
`omp.private` regions
Introduces conversion of `omp.private`'s regions to the LLVM dialect.
This reuses the already existing conversion pattern for
`ReducetionDeclareOp` and repurposes it to be used for multi-region ops
as well.
---
mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td | 6 ++++
.../Conversion/OpenMPToLLVM/OpenMPToLLVM.cpp | 32 +++++++++++--------
mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp | 9 ++++++
.../OpenMPToLLVM/convert-to-llvmir.mlir | 26 +++++++++++++++
4 files changed, 60 insertions(+), 13 deletions(-)
diff --git a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
index 0adf186ae0c7e9..4ddb784d3aeef6 100644
--- a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
+++ b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
@@ -221,6 +221,12 @@ def PrivateClauseOp : OpenMP_Op<"private", [IsolatedFromAbove]> {
attr-dict
}];
+ let builders = [
+ OpBuilder<(ins CArg<"TypeRange">:$result,
+ CArg<"StringAttr">:$sym_name,
+ CArg<"TypeAttr">:$type)>
+ ];
+
let hasVerifier = 1;
}
diff --git a/mlir/lib/Conversion/OpenMPToLLVM/OpenMPToLLVM.cpp b/mlir/lib/Conversion/OpenMPToLLVM/OpenMPToLLVM.cpp
index 730858ffc67a71..2eba4fba105c7b 100644
--- a/mlir/lib/Conversion/OpenMPToLLVM/OpenMPToLLVM.cpp
+++ b/mlir/lib/Conversion/OpenMPToLLVM/OpenMPToLLVM.cpp
@@ -200,16 +200,20 @@ struct ReductionOpConversion : public ConvertOpToLLVMPattern<omp::ReductionOp> {
}
};
-struct ReductionDeclareOpConversion
- : public ConvertOpToLLVMPattern<omp::ReductionDeclareOp> {
- using ConvertOpToLLVMPattern<omp::ReductionDeclareOp>::ConvertOpToLLVMPattern;
+template <typename OpType>
+struct MultiRegionOpConversion : public ConvertOpToLLVMPattern<OpType> {
+ using ConvertOpToLLVMPattern<OpType>::ConvertOpToLLVMPattern;
LogicalResult
- matchAndRewrite(omp::ReductionDeclareOp curOp, OpAdaptor adaptor,
+ matchAndRewrite(OpType curOp, typename OpType::Adaptor adaptor,
ConversionPatternRewriter &rewriter) const override {
- auto newOp = rewriter.create<omp::ReductionDeclareOp>(
+ auto newOp = rewriter.create<OpType>(
curOp.getLoc(), TypeRange(), curOp.getSymNameAttr(),
TypeAttr::get(this->getTypeConverter()->convertType(
curOp.getTypeAttr().getValue())));
+
+ if constexpr (std::is_same_v<OpType, mlir::omp::PrivateClauseOp>)
+ newOp.setDataSharingType(curOp.getDataSharingType());
+
for (unsigned idx = 0; idx < curOp.getNumRegions(); idx++) {
rewriter.inlineRegionBefore(curOp.getRegion(idx), newOp.getRegion(idx),
newOp.getRegion(idx).end());
@@ -231,11 +235,12 @@ void mlir::configureOpenMPToLLVMConversionLegality(
mlir::omp::DataOp, mlir::omp::OrderedRegionOp, mlir::omp::ParallelOp,
mlir::omp::WsLoopOp, mlir::omp::SimdLoopOp, mlir::omp::MasterOp,
mlir::omp::SectionOp, mlir::omp::SectionsOp, mlir::omp::SingleOp,
- mlir::omp::TaskGroupOp, mlir::omp::TaskOp>([&](Operation *op) {
- return typeConverter.isLegal(&op->getRegion(0)) &&
- typeConverter.isLegal(op->getOperandTypes()) &&
- typeConverter.isLegal(op->getResultTypes());
- });
+ mlir::omp::TaskGroupOp, mlir::omp::TaskOp, mlir::omp::PrivateClauseOp>(
+ [&](Operation *op) {
+ return typeConverter.isLegal(&op->getRegion(0)) &&
+ typeConverter.isLegal(op->getOperandTypes()) &&
+ typeConverter.isLegal(op->getResultTypes());
+ });
target.addDynamicallyLegalOp<
mlir::omp::AtomicReadOp, mlir::omp::AtomicWriteOp, mlir::omp::FlushOp,
mlir::omp::ThreadprivateOp, mlir::omp::YieldOp, mlir::omp::EnterDataOp,
@@ -267,9 +272,10 @@ void mlir::populateOpenMPToLLVMConversionPatterns(LLVMTypeConverter &converter,
patterns.add<
AtomicReadOpConversion, MapInfoOpConversion, ReductionOpConversion,
- ReductionDeclareOpConversion, RegionOpConversion<omp::CriticalOp>,
- RegionOpConversion<omp::MasterOp>, ReductionOpConversion,
- RegionOpConversion<omp::OrderedRegionOp>,
+ MultiRegionOpConversion<omp::ReductionDeclareOp>,
+ MultiRegionOpConversion<omp::PrivateClauseOp>,
+ RegionOpConversion<omp::CriticalOp>, RegionOpConversion<omp::MasterOp>,
+ ReductionOpConversion, RegionOpConversion<omp::OrderedRegionOp>,
RegionOpConversion<omp::ParallelOp>, RegionOpConversion<omp::WsLoopOp>,
RegionOpConversion<omp::SectionsOp>, RegionOpConversion<omp::SectionOp>,
RegionOpConversion<omp::SimdLoopOp>, RegionOpConversion<omp::SingleOp>,
diff --git a/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp b/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
index 13fc01d58eced5..2e23bd9e429cfe 100644
--- a/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
+++ b/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
@@ -1753,6 +1753,15 @@ LogicalResult DataBoundsOp::verify() {
return success();
}
+void PrivateClauseOp::build(OpBuilder &odsBuilder, OperationState &odsState,
+ TypeRange /*result_types*/, StringAttr symName,
+ TypeAttr type) {
+ PrivateClauseOp::build(
+ odsBuilder, odsState, symName, type,
+ DataSharingClauseTypeAttr::get(odsBuilder.getContext(),
+ DataSharingClauseType::Private));
+}
+
LogicalResult PrivateClauseOp::verify() {
Type symType = getType();
diff --git a/mlir/test/Conversion/OpenMPToLLVM/convert-to-llvmir.mlir b/mlir/test/Conversion/OpenMPToLLVM/convert-to-llvmir.mlir
index ae3bb6ccea7a8b..6cbc0c8f4be9a2 100644
--- a/mlir/test/Conversion/OpenMPToLLVM/convert-to-llvmir.mlir
+++ b/mlir/test/Conversion/OpenMPToLLVM/convert-to-llvmir.mlir
@@ -485,3 +485,29 @@ llvm.func @_QPtarget_map_with_bounds(%arg0: !llvm.ptr, %arg1: !llvm.ptr, %arg2:
}
llvm.return
}
+
+// -----
+
+// CHECK: omp.private {type = private} @x.privatizer : !llvm.struct<{{.*}}> alloc {
+omp.private {type = private} @x.privatizer : memref<?xf32> alloc {
+// CHECK: ^bb0(%arg0: !llvm.struct<{{.*}}>):
+^bb0(%arg0: memref<?xf32>):
+ // CHECK: omp.yield(%arg0 : !llvm.struct<{{.*}}>)
+ omp.yield(%arg0 : memref<?xf32>)
+}
+
+// -----
+
+// CHECK: omp.private {type = firstprivate} @y.privatizer : i64 alloc {
+omp.private {type = firstprivate} @y.privatizer : index alloc {
+// CHECK: ^bb0(%arg0: i64):
+^bb0(%arg0: index):
+ // CHECK: omp.yield(%arg0 : i64)
+ omp.yield(%arg0 : index)
+// CHECK: } copy {
+} copy {
+// CHECK: ^bb0(%arg0: i64, %arg1: i64):
+^bb0(%arg0: index, %arg1: index):
+ // CHECK: omp.yield(%arg0 : i64)
+ omp.yield(%arg0 : index)
+}
>From 0bb141524dd4c97e9cc4789726a12cbe3f8942de Mon Sep 17 00:00:00 2001
From: ergawy <kareem.ergawy at amd.com>
Date: Sun, 11 Feb 2024 09:37:59 -0600
Subject: [PATCH 2/3] [MLIR][OpenMP] Add `private` clause to `omp.parallel`
Extends the `omp.parallel` op by adding a `private` clause to model
[first]private variables. This uses the `omp.private` op to map
privatized variables to their corresponding privatizers.
Example `omp.private` op with `private` variable:
```
omp.parallel private(@x.privatizer %arg0 -> %arg1 : !llvm.ptr) {
// ... use %arg1 ...
omp.terminator
}
```
Whether the variable is private or firstprivate is determined by the
attributes of the corresponding `omp.private` op.
---
flang/lib/Lower/OpenMP.cpp | 3 +-
mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td | 6 +-
.../Conversion/SCFToOpenMP/SCFToOpenMP.cpp | 4 +-
mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp | 177 +++++++++++++-----
mlir/test/Dialect/OpenMP/invalid.mlir | 56 ++++++
mlir/test/Dialect/OpenMP/ops-2.mlir | 74 ++++++++
mlir/test/Dialect/OpenMP/ops.mlir | 10 +-
mlir/test/Dialect/OpenMP/roundtrip.mlir | 21 ---
8 files changed, 275 insertions(+), 76 deletions(-)
create mode 100644 mlir/test/Dialect/OpenMP/ops-2.mlir
delete mode 100644 mlir/test/Dialect/OpenMP/roundtrip.mlir
diff --git a/flang/lib/Lower/OpenMP.cpp b/flang/lib/Lower/OpenMP.cpp
index 24f91765cb439b..74b2727961a03d 100644
--- a/flang/lib/Lower/OpenMP.cpp
+++ b/flang/lib/Lower/OpenMP.cpp
@@ -2640,7 +2640,8 @@ genParallelOp(Fortran::lower::AbstractConverter &converter,
? nullptr
: mlir::ArrayAttr::get(converter.getFirOpBuilder().getContext(),
reductionDeclSymbols),
- procBindKindAttr);
+ procBindKindAttr, /*private_vars=*/llvm::SmallVector<mlir::Value>{},
+ /*privatizers=*/nullptr);
}
static mlir::omp::SectionOp
diff --git a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
index 4ddb784d3aeef6..9ed40904f22ae2 100644
--- a/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
+++ b/mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td
@@ -276,7 +276,9 @@ def ParallelOp : OpenMP_Op<"parallel", [
Variadic<AnyType>:$allocators_vars,
Variadic<OpenMP_PointerLikeType>:$reduction_vars,
OptionalAttr<SymbolRefArrayAttr>:$reductions,
- OptionalAttr<ProcBindKindAttr>:$proc_bind_val);
+ OptionalAttr<ProcBindKindAttr>:$proc_bind_val,
+ Variadic<AnyType>:$private_vars,
+ OptionalAttr<SymbolRefArrayAttr>:$privatizers);
let regions = (region AnyRegion:$region);
@@ -297,7 +299,7 @@ def ParallelOp : OpenMP_Op<"parallel", [
$allocators_vars, type($allocators_vars)
) `)`
| `proc_bind` `(` custom<ClauseAttr>($proc_bind_val) `)`
- ) custom<ParallelRegion>($region, $reduction_vars, type($reduction_vars), $reductions) attr-dict
+ ) custom<ParallelRegion>($region, $reduction_vars, type($reduction_vars), $reductions, $private_vars, type($private_vars), $privatizers) attr-dict
}];
let hasVerifier = 1;
}
diff --git a/mlir/lib/Conversion/SCFToOpenMP/SCFToOpenMP.cpp b/mlir/lib/Conversion/SCFToOpenMP/SCFToOpenMP.cpp
index ea5f31ee8c6aa7..464a647564aced 100644
--- a/mlir/lib/Conversion/SCFToOpenMP/SCFToOpenMP.cpp
+++ b/mlir/lib/Conversion/SCFToOpenMP/SCFToOpenMP.cpp
@@ -450,7 +450,9 @@ struct ParallelOpLowering : public OpRewritePattern<scf::ParallelOp> {
/* allocators_vars = */ llvm::SmallVector<Value>{},
/* reduction_vars = */ llvm::SmallVector<Value>{},
/* reductions = */ ArrayAttr{},
- /* proc_bind_val = */ omp::ClauseProcBindKindAttr{});
+ /* proc_bind_val = */ omp::ClauseProcBindKindAttr{},
+ /* private_vars = */ ValueRange(),
+ /* privatizers = */ nullptr);
{
OpBuilder::InsertionGuard guard(rewriter);
diff --git a/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp b/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
index 2e23bd9e429cfe..69e91fbd95e618 100644
--- a/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
+++ b/mlir/lib/Dialect/OpenMP/IR/OpenMPDialect.cpp
@@ -430,68 +430,102 @@ static void printScheduleClause(OpAsmPrinter &p, Operation *op,
// Parser, printer and verifier for ReductionVarList
//===----------------------------------------------------------------------===//
-ParseResult
-parseReductionClause(OpAsmParser &parser, Region ®ion,
- SmallVectorImpl<OpAsmParser::UnresolvedOperand> &operands,
- SmallVectorImpl<Type> &types, ArrayAttr &reductionSymbols,
- SmallVectorImpl<OpAsmParser::Argument> &privates) {
- if (failed(parser.parseOptionalKeyword("reduction")))
- return failure();
-
+ParseResult parseClauseWithRegionArgs(
+ OpAsmParser &parser, Region ®ion,
+ SmallVectorImpl<OpAsmParser::UnresolvedOperand> &operands,
+ SmallVectorImpl<Type> &types, ArrayAttr &symbols,
+ SmallVectorImpl<OpAsmParser::Argument> ®ionPrivateArgs) {
SmallVector<SymbolRefAttr> reductionVec;
+ unsigned regionArgOffset = regionPrivateArgs.size();
if (failed(
parser.parseCommaSeparatedList(OpAsmParser::Delimiter::Paren, [&]() {
if (parser.parseAttribute(reductionVec.emplace_back()) ||
parser.parseOperand(operands.emplace_back()) ||
parser.parseArrow() ||
- parser.parseArgument(privates.emplace_back()) ||
+ parser.parseArgument(regionPrivateArgs.emplace_back()) ||
parser.parseColonType(types.emplace_back()))
return failure();
return success();
})))
return failure();
- for (auto [prv, type] : llvm::zip_equal(privates, types)) {
+ auto *argsBegin = regionPrivateArgs.begin();
+ MutableArrayRef argsSubrange(argsBegin + regionArgOffset,
+ argsBegin + regionArgOffset + types.size());
+ for (auto [prv, type] : llvm::zip_equal(argsSubrange, types)) {
prv.type = type;
}
SmallVector<Attribute> reductions(reductionVec.begin(), reductionVec.end());
- reductionSymbols = ArrayAttr::get(parser.getContext(), reductions);
+ symbols = ArrayAttr::get(parser.getContext(), reductions);
return success();
}
-static void printReductionClause(OpAsmPrinter &p, Operation *op,
- ValueRange reductionArgs, ValueRange operands,
- TypeRange types, ArrayAttr reductionSymbols) {
- p << "reduction(";
+static void printClauseWithRegionArgs(OpAsmPrinter &p, Operation *op,
+ ValueRange argsSubrange,
+ StringRef clauseName, ValueRange operands,
+ TypeRange types, ArrayAttr symbols) {
+ p << clauseName << "(";
llvm::interleaveComma(
- llvm::zip_equal(reductionSymbols, operands, reductionArgs, types), p,
- [&p](auto t) {
+ llvm::zip_equal(symbols, operands, argsSubrange, types), p, [&p](auto t) {
auto [sym, op, arg, type] = t;
p << sym << " " << op << " -> " << arg << " : " << type;
});
p << ") ";
}
-static ParseResult
-parseParallelRegion(OpAsmParser &parser, Region ®ion,
- SmallVectorImpl<OpAsmParser::UnresolvedOperand> &operands,
- SmallVectorImpl<Type> &types, ArrayAttr &reductionSymbols) {
+static ParseResult parseParallelRegion(
+ OpAsmParser &parser, Region ®ion,
+ SmallVectorImpl<OpAsmParser::UnresolvedOperand> &reductionVarOperands,
+ SmallVectorImpl<Type> &reductionVarTypes, ArrayAttr &reductionSymbols,
+ llvm::SmallVectorImpl<OpAsmParser::UnresolvedOperand> &privateVarOperands,
+ llvm::SmallVectorImpl<Type> &privateVarsTypes,
+ ArrayAttr &privatizerSymbols) {
+ llvm::SmallVector<OpAsmParser::Argument> regionPrivateArgs;
- llvm::SmallVector<OpAsmParser::Argument> privates;
- if (succeeded(parseReductionClause(parser, region, operands, types,
- reductionSymbols, privates)))
- return parser.parseRegion(region, privates);
+ if (succeeded(parser.parseOptionalKeyword("reduction"))) {
+ if (failed(parseClauseWithRegionArgs(parser, region, reductionVarOperands,
+ reductionVarTypes, reductionSymbols,
+ regionPrivateArgs)))
+ return failure();
+ }
- return parser.parseRegion(region);
+ if (succeeded(parser.parseOptionalKeyword("private"))) {
+ if (failed(parseClauseWithRegionArgs(parser, region, privateVarOperands,
+ privateVarsTypes, privatizerSymbols,
+ regionPrivateArgs)))
+ return failure();
+ }
+
+ return parser.parseRegion(region, regionPrivateArgs);
}
static void printParallelRegion(OpAsmPrinter &p, Operation *op, Region ®ion,
- ValueRange operands, TypeRange types,
- ArrayAttr reductionSymbols) {
- if (reductionSymbols)
- printReductionClause(p, op, region.front().getArguments(), operands, types,
- reductionSymbols);
+ ValueRange reductionVarOperands,
+ TypeRange reductionVarTypes,
+ ArrayAttr reductionSymbols,
+ ValueRange privateVarOperands,
+ TypeRange privateVarTypes,
+ ArrayAttr privatizerSymbols) {
+ if (reductionSymbols) {
+ auto *argsBegin = region.front().getArguments().begin();
+ MutableArrayRef argsSubrange(argsBegin,
+ argsBegin + reductionVarTypes.size());
+ printClauseWithRegionArgs(p, op, argsSubrange, "reduction",
+ reductionVarOperands, reductionVarTypes,
+ reductionSymbols);
+ }
+
+ if (privatizerSymbols) {
+ auto *argsBegin = region.front().getArguments().begin();
+ MutableArrayRef argsSubrange(argsBegin + reductionVarOperands.size(),
+ argsBegin + reductionVarOperands.size() +
+ privateVarTypes.size());
+ printClauseWithRegionArgs(p, op, argsSubrange, "private",
+ privateVarOperands, privateVarTypes,
+ privatizerSymbols);
+ }
+
p.printRegion(region, /*printEntryBlockArgs=*/false);
}
@@ -1008,9 +1042,8 @@ static LogicalResult verifyMapClause(Operation *op, OperandRange mapOperands) {
}
if (always || close || implicit) {
- return emitError(
- op->getLoc(),
- "present, mapper and iterator map type modifiers are permitted");
+ return emitError(op->getLoc(), "present, mapper and iterator map "
+ "type modifiers are permitted");
}
to ? updateToVars.insert(updateVar) : updateFromVars.insert(updateVar);
@@ -1070,14 +1103,63 @@ void ParallelOp::build(OpBuilder &builder, OperationState &state,
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);
+ /*proc_bind_val=*/nullptr, /*private_vars=*/ValueRange(),
+ /*privatizers=*/nullptr);
state.addAttributes(attributes);
}
+static LogicalResult verifyPrivateVarList(ParallelOp &op) {
+ auto privateVars = op.getPrivateVars();
+ auto privatizers = op.getPrivatizersAttr();
+
+ if (privateVars.empty() && (privatizers == nullptr || privatizers.empty()))
+ return success();
+
+ auto numPrivateVars = privateVars.size();
+ auto numPrivatizers = (privatizers == nullptr) ? 0 : privatizers.size();
+
+ if (numPrivateVars != numPrivatizers)
+ return op.emitError() << "inconsistent number of private variables and "
+ "privatizer op symbols, private vars: "
+ << numPrivateVars
+ << " vs. privatizer op symbols: " << numPrivatizers;
+
+ for (auto privateVarInfo : llvm::zip(privateVars, privatizers)) {
+ Type varType = std::get<0>(privateVarInfo).getType();
+ SymbolRefAttr privatizerSym =
+ std::get<1>(privateVarInfo).cast<SymbolRefAttr>();
+ PrivateClauseOp privatizerOp =
+ SymbolTable::lookupNearestSymbolFrom<PrivateClauseOp>(op,
+ privatizerSym);
+
+ if (privatizerOp == nullptr)
+ return op.emitError() << "failed to lookup privatizer op with symbol: '"
+ << privatizerSym << "'";
+
+ Type privatizerType = privatizerOp.getType();
+
+ if (varType != privatizerType)
+ return op.emitError()
+ << "type mismatch between a "
+ << (privatizerOp.getDataSharingType() ==
+ DataSharingClauseType::Private
+ ? "private"
+ : "firstprivate")
+ << " variable and its privatizer op, var type: " << varType
+ << " vs. privatizer op type: " << privatizerType;
+ }
+
+ return success();
+}
+
LogicalResult ParallelOp::verify() {
if (getAllocateVars().size() != getAllocatorsVars().size())
return emitError(
"expected equal sizes for allocate and allocator variables");
+
+ if (failed(verifyPrivateVarList(*this)))
+ return failure();
+
return verifyReductionVarList(*this, getReductions(), getReductionVars());
}
@@ -1111,8 +1193,8 @@ LogicalResult TeamsOp::verify() {
return emitError("expected num_teams upper bound to be defined if the "
"lower bound is defined");
if (numTeamsLowerBound.getType() != numTeamsUpperBound.getType())
- return emitError(
- "expected num_teams upper bound and lower bound to be the same type");
+ return emitError("expected num_teams upper bound and lower bound to be "
+ "the same type");
}
// Check for allocate clause restrictions
@@ -1174,9 +1256,10 @@ parseWsLoop(OpAsmParser &parser, Region ®ion,
// Parse an optional reduction clause
llvm::SmallVector<OpAsmParser::Argument> privates;
- bool hasReduction = succeeded(
- parseReductionClause(parser, region, reductionOperands, reductionTypes,
- reductionSymbols, privates));
+ bool hasReduction = succeeded(parser.parseOptionalKeyword("reduction")) &&
+ succeeded(parseClauseWithRegionArgs(
+ parser, region, reductionOperands, reductionTypes,
+ reductionSymbols, privates));
if (parser.parseKeyword("for"))
return failure();
@@ -1223,8 +1306,9 @@ void printWsLoop(OpAsmPrinter &p, Operation *op, Region ®ion,
if (reductionSymbols) {
auto reductionArgs =
region.front().getArguments().drop_front(loopVarTypes.size());
- printReductionClause(p, op, reductionArgs, reductionOperands,
- reductionTypes, reductionSymbols);
+ printClauseWithRegionArgs(p, op, reductionArgs, "reduction",
+ reductionOperands, reductionTypes,
+ reductionSymbols);
}
p << " for ";
@@ -1464,9 +1548,9 @@ LogicalResult TaskLoopOp::verify() {
}
if (getGrainSize() && getNumTasks()) {
- return emitError(
- "the grainsize clause and num_tasks clause are mutually exclusive and "
- "may not appear on the same taskloop directive");
+ return emitError("the grainsize clause and num_tasks clause are mutually "
+ "exclusive and "
+ "may not appear on the same taskloop directive");
}
return success();
}
@@ -1535,7 +1619,8 @@ LogicalResult OrderedOp::verify() {
}
LogicalResult OrderedRegionOp::verify() {
- // TODO: The code generation for ordered simd directive is not supported yet.
+ // TODO: The code generation for ordered simd directive is not supported
+ // yet.
if (getSimd())
return failure();
diff --git a/mlir/test/Dialect/OpenMP/invalid.mlir b/mlir/test/Dialect/OpenMP/invalid.mlir
index 523a4038b7c32a..cebc7e89206232 100644
--- a/mlir/test/Dialect/OpenMP/invalid.mlir
+++ b/mlir/test/Dialect/OpenMP/invalid.mlir
@@ -1809,3 +1809,59 @@ omp.private {type = firstprivate} @x.privatizer : f32 alloc {
^bb0(%arg0: f32):
omp.yield(%arg0 : f32)
}
+
+// -----
+
+func.func @private_type_mismatch(%arg0: index) {
+// expected-error @below {{type mismatch between a private variable and its privatizer op, var type: 'index' vs. privatizer op type: '!llvm.ptr'}}
+ omp.parallel private(@var1.privatizer %arg0 -> %arg2 : index) {
+ omp.terminator
+ }
+
+ return
+}
+
+omp.private {type = private} @var1.privatizer : !llvm.ptr alloc {
+^bb0(%arg0: !llvm.ptr):
+ omp.yield(%arg0 : !llvm.ptr)
+}
+
+// -----
+
+func.func @firstprivate_type_mismatch(%arg0: index) {
+ // expected-error @below {{type mismatch between a firstprivate variable and its privatizer op, var type: 'index' vs. privatizer op type: '!llvm.ptr'}}
+ omp.parallel private(@var1.privatizer %arg0 -> %arg2 : index) {
+ omp.terminator
+ }
+
+ return
+}
+
+omp.private {type = firstprivate} @var1.privatizer : !llvm.ptr alloc {
+^bb0(%arg0: !llvm.ptr):
+ omp.yield(%arg0 : !llvm.ptr)
+} copy {
+^bb0(%arg0: !llvm.ptr, %arg1: !llvm.ptr):
+ omp.yield(%arg0 : !llvm.ptr)
+}
+
+// -----
+
+func.func @undefined_privatizer(%arg0: index) {
+ // expected-error @below {{failed to lookup privatizer op with symbol: '@var1.privatizer'}}
+ omp.parallel private(@var1.privatizer %arg0 -> %arg2 : index) {
+ omp.terminator
+ }
+
+ return
+}
+
+// -----
+func.func @undefined_privatizer(%arg0: !llvm.ptr) {
+ // expected-error @below {{inconsistent number of private variables and privatizer op symbols, private vars: 1 vs. privatizer op symbols: 2}}
+ "omp.parallel"(%arg0) <{operandSegmentSizes = array<i32: 0, 0, 0, 0, 0, 1>, privatizers = [@x.privatizer, @y.privatizer]}> ({
+ ^bb0(%arg2: !llvm.ptr):
+ omp.terminator
+ }) : (!llvm.ptr) -> ()
+ return
+}
diff --git a/mlir/test/Dialect/OpenMP/ops-2.mlir b/mlir/test/Dialect/OpenMP/ops-2.mlir
new file mode 100644
index 00000000000000..9340e0b5fdf971
--- /dev/null
+++ b/mlir/test/Dialect/OpenMP/ops-2.mlir
@@ -0,0 +1,74 @@
+// RUN: mlir-opt -verify-diagnostics %s | mlir-opt | FileCheck %s
+
+// CHECK-LABEL: parallel_op_privatizers
+func.func @parallel_op_privatizers(%arg0: !llvm.ptr, %arg1: !llvm.ptr) {
+ // CHECK: omp.parallel private(@x.privatizer %arg0 -> %arg2 : !llvm.ptr, @y.privatizer %arg1 -> %arg3 : !llvm.ptr)
+ omp.parallel private(@x.privatizer %arg0 -> %arg2 : !llvm.ptr, @y.privatizer %arg1 -> %arg3 : !llvm.ptr) {
+ %0 = llvm.load %arg2 : !llvm.ptr -> i32
+ %1 = llvm.load %arg3 : !llvm.ptr -> i32
+ omp.terminator
+ }
+ return
+}
+
+// CHECK: omp.private {type = private} @x.privatizer : !llvm.ptr alloc {
+omp.private {type = private} @x.privatizer : !llvm.ptr alloc {
+// CHECK: ^bb0(%arg0: {{.*}}):
+^bb0(%arg0: !llvm.ptr):
+ omp.yield(%arg0 : !llvm.ptr)
+}
+
+// CHECK: omp.private {type = firstprivate} @y.privatizer : !llvm.ptr alloc {
+omp.private {type = firstprivate} @y.privatizer : !llvm.ptr alloc {
+// CHECK: ^bb0(%arg0: {{.*}}):
+^bb0(%arg0: !llvm.ptr):
+ omp.yield(%arg0 : !llvm.ptr)
+// CHECK: } copy {
+} copy {
+// CHECK: ^bb0(%arg0: {{.*}}, %arg1: {{.*}}):
+^bb0(%arg0: !llvm.ptr, %arg1: !llvm.ptr):
+ omp.yield(%arg0 : !llvm.ptr)
+}
+
+// CHECK-LABEL: parallel_op_reduction_and_private
+func.func @parallel_op_reduction_and_private(%priv_var: !llvm.ptr, %priv_var2: !llvm.ptr, %reduc_var: !llvm.ptr, %reduc_var2: !llvm.ptr) {
+ // CHECK: omp.parallel
+ // CHECK-SAME: reduction(
+ // CHECK-SAME: @add_f32 %[[reduc_var:[0-9a-z]+]] -> %[[reduc_arg:[0-9a-z]+]] : !llvm.ptr,
+ // CHECK-SAME: @add_f32 %[[reduc_var2:[0-9a-z]+]] -> %[[reduc_arg2:[0-9a-z]+]] : !llvm.ptr)
+ //
+ // CHECK-SAME: private(
+ // CHECK-SAME: @x.privatizer %[[priv_var:[0-9a-z]+]] -> %[[priv_arg:[0-9a-z]+]] : !llvm.ptr,
+ // CHECK-SAME: @y.privatizer %[[priv_var2:[0-9a-z]+]] -> %[[priv_arg2:[0-9a-z]+]] : !llvm.ptr)
+ omp.parallel reduction(@add_f32 %reduc_var -> %reduc_arg : !llvm.ptr, @add_f32 %reduc_var2 -> %reduc_arg2 : !llvm.ptr)
+ private(@x.privatizer %priv_var -> %priv_arg : !llvm.ptr, @y.privatizer %priv_var2 -> %priv_arg2 : !llvm.ptr) {
+ // CHECK: llvm.load %[[priv_arg]]
+ %0 = llvm.load %priv_arg : !llvm.ptr -> f32
+ // CHECK: llvm.load %[[priv_arg2]]
+ %1 = llvm.load %priv_arg2 : !llvm.ptr -> f32
+ // CHECK: llvm.load %[[reduc_arg]]
+ %2 = llvm.load %reduc_arg : !llvm.ptr -> f32
+ // CHECK: llvm.load %[[reduc_arg2]]
+ %3 = llvm.load %reduc_arg2 : !llvm.ptr -> f32
+ omp.terminator
+ }
+ return
+}
+
+omp.reduction.declare @add_f32 : f32
+init {
+^bb0(%arg: f32):
+ %0 = arith.constant 0.0 : f32
+ omp.yield (%0 : f32)
+}
+combiner {
+^bb1(%arg0: f32, %arg1: f32):
+ %1 = arith.addf %arg0, %arg1 : f32
+ omp.yield (%1 : f32)
+}
+atomic {
+^bb2(%arg2: !llvm.ptr, %arg3: !llvm.ptr):
+ %2 = llvm.load %arg3 : !llvm.ptr -> f32
+ llvm.atomicrmw fadd %arg2, %2 monotonic : !llvm.ptr, f32
+ omp.yield
+}
diff --git a/mlir/test/Dialect/OpenMP/ops.mlir b/mlir/test/Dialect/OpenMP/ops.mlir
index 99ca802089b8d3..33ff643e9fd720 100644
--- a/mlir/test/Dialect/OpenMP/ops.mlir
+++ b/mlir/test/Dialect/OpenMP/ops.mlir
@@ -59,7 +59,7 @@ func.func @omp_parallel(%data_var : memref<i32>, %if_cond : i1, %num_threads : i
// CHECK: omp.parallel num_threads(%{{.*}} : i32) allocate(%{{.*}} : memref<i32> -> %{{.*}} : memref<i32>)
"omp.parallel"(%num_threads, %data_var, %data_var) ({
omp.terminator
- }) {operandSegmentSizes = array<i32: 0,1,1,1,0>} : (i32, memref<i32>, memref<i32>) -> ()
+ }) {operandSegmentSizes = array<i32: 0,1,1,1,0,0>} : (i32, memref<i32>, memref<i32>) -> ()
// CHECK: omp.barrier
omp.barrier
@@ -68,22 +68,22 @@ func.func @omp_parallel(%data_var : memref<i32>, %if_cond : i1, %num_threads : i
// CHECK: omp.parallel if(%{{.*}}) allocate(%{{.*}} : memref<i32> -> %{{.*}} : memref<i32>)
"omp.parallel"(%if_cond, %data_var, %data_var) ({
omp.terminator
- }) {operandSegmentSizes = array<i32: 1,0,1,1,0>} : (i1, memref<i32>, memref<i32>) -> ()
+ }) {operandSegmentSizes = array<i32: 1,0,1,1,0,0>} : (i1, memref<i32>, memref<i32>) -> ()
// test without allocate
// CHECK: omp.parallel if(%{{.*}}) num_threads(%{{.*}} : i32)
"omp.parallel"(%if_cond, %num_threads) ({
omp.terminator
- }) {operandSegmentSizes = array<i32: 1,1,0,0,0>} : (i1, i32) -> ()
+ }) {operandSegmentSizes = array<i32: 1,1,0,0,0,0>} : (i1, i32) -> ()
omp.terminator
- }) {operandSegmentSizes = array<i32: 1,1,1,1,0>, proc_bind_val = #omp<procbindkind spread>} : (i1, i32, memref<i32>, memref<i32>) -> ()
+ }) {operandSegmentSizes = array<i32: 1,1,1,1,0,0>, proc_bind_val = #omp<procbindkind spread>} : (i1, i32, memref<i32>, memref<i32>) -> ()
// test with multiple parameters for single variadic argument
// CHECK: omp.parallel allocate(%{{.*}} : memref<i32> -> %{{.*}} : memref<i32>)
"omp.parallel" (%data_var, %data_var) ({
omp.terminator
- }) {operandSegmentSizes = array<i32: 0,0,1,1,0>} : (memref<i32>, memref<i32>) -> ()
+ }) {operandSegmentSizes = array<i32: 0,0,1,1,0,0>} : (memref<i32>, memref<i32>) -> ()
return
}
diff --git a/mlir/test/Dialect/OpenMP/roundtrip.mlir b/mlir/test/Dialect/OpenMP/roundtrip.mlir
deleted file mode 100644
index 2553442638ee84..00000000000000
--- a/mlir/test/Dialect/OpenMP/roundtrip.mlir
+++ /dev/null
@@ -1,21 +0,0 @@
-// RUN: mlir-opt -verify-diagnostics %s | mlir-opt | FileCheck %s
-
-// CHECK: omp.private {type = private} @x.privatizer : !llvm.ptr alloc {
-omp.private {type = private} @x.privatizer : !llvm.ptr alloc {
-// CHECK: ^bb0(%arg0: {{.*}}):
-^bb0(%arg0: !llvm.ptr):
- omp.yield(%arg0 : !llvm.ptr)
-}
-
-// CHECK: omp.private {type = firstprivate} @y.privatizer : !llvm.ptr alloc {
-omp.private {type = firstprivate} @y.privatizer : !llvm.ptr alloc {
-// CHECK: ^bb0(%arg0: {{.*}}):
-^bb0(%arg0: !llvm.ptr):
- omp.yield(%arg0 : !llvm.ptr)
-// CHECK: } copy {
-} copy {
-// CHECK: ^bb0(%arg0: {{.*}}, %arg1: {{.*}}):
-^bb0(%arg0: !llvm.ptr, %arg1: !llvm.ptr):
- omp.yield(%arg0 : !llvm.ptr)
-}
-
>From 91ccce2c692eb38df1839a13385b80b187efd1a5 Mon Sep 17 00:00:00 2001
From: ergawy <kareem.ergawy at amd.com>
Date: Wed, 14 Feb 2024 04:24:06 -0600
Subject: [PATCH 3/3] [flang][OpenMP][MLIR] Basic support for delayed
privatization code-gen
Adds basic support for emitting delayed privatizers from flang. So far,
only types of symbols are supported (i.e. scalars), support for more
complicated types will be added later. This also makes sure that
reductio and delayed privatization work properly together by merging the
body-gen callbacks for both in case both clauses are present on the
parallel construct.
---
flang/include/flang/Lower/AbstractConverter.h | 4 +
flang/lib/Lower/Bridge.cpp | 2 +-
flang/lib/Lower/OpenMP.cpp | 235 ++++++++++++++++--
.../delayed-privatization-firstprivate.f90 | 26 ++
.../FIR/delayed-privatization-private.f90 | 38 +++
.../OpenMP/FIR/parallel-reduction-private.f90 | 30 +++
6 files changed, 307 insertions(+), 28 deletions(-)
create mode 100644 flang/test/Lower/OpenMP/FIR/delayed-privatization-firstprivate.f90
create mode 100644 flang/test/Lower/OpenMP/FIR/delayed-privatization-private.f90
create mode 100644 flang/test/Lower/OpenMP/FIR/parallel-reduction-private.f90
diff --git a/flang/include/flang/Lower/AbstractConverter.h b/flang/include/flang/Lower/AbstractConverter.h
index 796933a4eb5f68..55bc33e76e5f6e 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"
@@ -296,6 +297,9 @@ class AbstractConverter {
return loweringOptions;
}
+ virtual Fortran::lower::SymbolBox
+ lookupOneLevelUpSymbol(const Fortran::semantics::Symbol &sym) = 0;
+
private:
/// Options controlling lowering behavior.
const Fortran::lower::LoweringOptions &loweringOptions;
diff --git a/flang/lib/Lower/Bridge.cpp b/flang/lib/Lower/Bridge.cpp
index 76e127207d764e..09557888c52885 100644
--- a/flang/lib/Lower/Bridge.cpp
+++ b/flang/lib/Lower/Bridge.cpp
@@ -1070,7 +1070,7 @@ 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) {
+ lookupOneLevelUpSymbol(const Fortran::semantics::Symbol &sym) override {
if (Fortran::lower::SymbolBox v = localSymbols.lookupOneLevelUpSymbol(sym))
return v;
return {};
diff --git a/flang/lib/Lower/OpenMP.cpp b/flang/lib/Lower/OpenMP.cpp
index 74b2727961a03d..41aac0210448ae 100644
--- a/flang/lib/Lower/OpenMP.cpp
+++ b/flang/lib/Lower/OpenMP.cpp
@@ -40,6 +40,12 @@ static llvm::cl::opt<bool> treatIndexAsSection(
llvm::cl::desc("In the OpenMP data clauses treat `a(N)` as `a(N:N)`."),
llvm::cl::init(true));
+static llvm::cl::opt<bool> enableDelayedPrivatization(
+ "openmp-enable-delayed-privatization",
+ llvm::cl::desc(
+ "Emit `[first]private` variables as clauses on the MLIR ops."),
+ llvm::cl::init(false));
+
using DeclareTargetCapturePair =
std::pair<mlir::omp::DeclareTargetCaptureClause,
Fortran::semantics::Symbol>;
@@ -147,6 +153,14 @@ static void genNestedEvaluations(Fortran::lower::AbstractConverter &converter,
//===----------------------------------------------------------------------===//
class DataSharingProcessor {
+public:
+ struct DelayedPrivatizationInfo {
+ llvm::SmallVector<mlir::SymbolRefAttr> privatizers;
+ llvm::SmallVector<mlir::Value> hostAddresses;
+ llvm::SmallVector<const Fortran::semantics::Symbol *> hostSymbols;
+ };
+
+private:
bool hasLastPrivateOp;
mlir::OpBuilder::InsertPoint lastPrivIP;
mlir::OpBuilder::InsertPoint insPt;
@@ -161,6 +175,11 @@ class DataSharingProcessor {
const Fortran::parser::OmpClauseList &opClauseList;
Fortran::lower::pft::Evaluation &eval;
+ bool useDelayedPrivatization;
+ Fortran::lower::SymMap *symTable;
+
+ DelayedPrivatizationInfo delayedPrivatizationInfo;
+
bool needBarrier();
void collectSymbols(Fortran::semantics::Symbol::Flag flag);
void collectOmpObjectListSymbol(
@@ -171,10 +190,13 @@ class DataSharingProcessor {
void collectDefaultSymbols();
void privatize();
void defaultPrivatize();
+ void doPrivatize(const Fortran::semantics::Symbol *sym);
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
+ copyFirstPrivateSymbol(const Fortran::semantics::Symbol *sym,
+ mlir::OpBuilder::InsertPoint *copyAssignIP = nullptr);
void copyLastPrivateSymbol(const Fortran::semantics::Symbol *sym,
mlir::OpBuilder::InsertPoint *lastPrivIP);
void insertDeallocs();
@@ -182,10 +204,14 @@ class DataSharingProcessor {
public:
DataSharingProcessor(Fortran::lower::AbstractConverter &converter,
const Fortran::parser::OmpClauseList &opClauseList,
- Fortran::lower::pft::Evaluation &eval)
+ Fortran::lower::pft::Evaluation &eval,
+ bool useDelayedPrivatization = false,
+ Fortran::lower::SymMap *symTable = nullptr)
: hasLastPrivateOp(false), converter(converter),
firOpBuilder(converter.getFirOpBuilder()), opClauseList(opClauseList),
- eval(eval) {}
+ eval(eval), useDelayedPrivatization(useDelayedPrivatization),
+ symTable(symTable) {}
+
// Privatisation is split into two steps.
// Step1 performs cloning of all privatisation clauses and copying for
// firstprivates. Step1 is performed at the place where process/processStep1
@@ -204,6 +230,10 @@ class DataSharingProcessor {
assert(!loopIV && "Loop iteration variable already set");
loopIV = iv;
}
+
+ const DelayedPrivatizationInfo &getDelayedPrivatizationInfo() const {
+ return delayedPrivatizationInfo;
+ }
};
void DataSharingProcessor::processStep1() {
@@ -250,9 +280,10 @@ void DataSharingProcessor::cloneSymbol(const Fortran::semantics::Symbol *sym) {
}
void DataSharingProcessor::copyFirstPrivateSymbol(
- const Fortran::semantics::Symbol *sym) {
+ const Fortran::semantics::Symbol *sym,
+ mlir::OpBuilder::InsertPoint *copyAssignIP) {
if (sym->test(Fortran::semantics::Symbol::Flag::OmpFirstPrivate))
- converter.copyHostAssociateVar(*sym);
+ converter.copyHostAssociateVar(*sym, copyAssignIP);
}
void DataSharingProcessor::copyLastPrivateSymbol(
@@ -491,14 +522,10 @@ void DataSharingProcessor::privatize() {
for (const Fortran::semantics::Symbol *sym : privatizedSymbols) {
if (const auto *commonDet =
sym->detailsIf<Fortran::semantics::CommonBlockDetails>()) {
- for (const auto &mem : commonDet->objects()) {
- cloneSymbol(&*mem);
- copyFirstPrivateSymbol(&*mem);
- }
- } else {
- cloneSymbol(sym);
- copyFirstPrivateSymbol(sym);
- }
+ for (const auto &mem : commonDet->objects())
+ doPrivatize(&*mem);
+ } else
+ doPrivatize(sym);
}
}
@@ -522,11 +549,96 @@ void DataSharingProcessor::defaultPrivatize() {
!sym->GetUltimate().has<Fortran::semantics::NamelistDetails>() &&
!symbolsInNestedRegions.contains(sym) &&
!symbolsInParentRegions.contains(sym) &&
- !privatizedSymbols.contains(sym)) {
+ !privatizedSymbols.contains(sym))
+ doPrivatize(sym);
+ }
+}
+
+void DataSharingProcessor::doPrivatize(const Fortran::semantics::Symbol *sym) {
+ if (!useDelayedPrivatization) {
+ cloneSymbol(sym);
+ copyFirstPrivateSymbol(sym);
+ return;
+ }
+
+ Fortran::lower::SymbolBox hsb = converter.lookupOneLevelUpSymbol(*sym);
+ assert(hsb && "Host symbol box not found");
+
+ mlir::Type symType = hsb.getAddr().getType();
+ mlir::Location symLoc = hsb.getAddr().getLoc();
+ std::string privatizerName = sym->name().ToString() + ".privatizer";
+ bool isFirstPrivate =
+ sym->test(Fortran::semantics::Symbol::Flag::OmpFirstPrivate);
+
+ mlir::omp::PrivateClauseOp privatizerOp = [&]() {
+ auto moduleOp = firOpBuilder.getModule();
+
+ auto uniquePrivatizerName = fir::getTypeAsString(
+ symType, converter.getKindMap(),
+ sym->name().ToString() +
+ (isFirstPrivate ? "_firstprivate" : "_private"));
+
+ if (auto existingPrivatizer =
+ moduleOp.lookupSymbol<mlir::omp::PrivateClauseOp>(
+ uniquePrivatizerName))
+ return existingPrivatizer;
+
+ auto ip = firOpBuilder.saveInsertionPoint();
+ firOpBuilder.setInsertionPoint(&moduleOp.getBodyRegion().front(),
+ moduleOp.getBodyRegion().front().begin());
+ auto result = firOpBuilder.create<mlir::omp::PrivateClauseOp>(
+ symLoc, uniquePrivatizerName, symType,
+ isFirstPrivate ? mlir::omp::DataSharingClauseType ::FirstPrivate
+ : mlir::omp::DataSharingClauseType::Private);
+
+ symTable->pushScope();
+
+ // Populate the `alloc` region.
+ {
+ mlir::Region &allocRegion = result.getAllocRegion();
+ mlir::Block *allocEntryBlock = firOpBuilder.createBlock(
+ &allocRegion, /*insertPt=*/{}, symType, symLoc);
+
+ firOpBuilder.setInsertionPointToEnd(allocEntryBlock);
+ symTable->addSymbol(*sym, allocRegion.getArgument(0));
+ symTable->pushScope();
cloneSymbol(sym);
- copyFirstPrivateSymbol(sym);
+ firOpBuilder.create<mlir::omp::YieldOp>(
+ hsb.getAddr().getLoc(),
+ symTable->shallowLookupSymbol(*sym).getAddr());
+ symTable->popScope();
}
- }
+
+ // Poplate the `copy` region if this is a `firstprivate`.
+ if (isFirstPrivate) {
+ mlir::Region ©Region = result.getCopyRegion();
+ // First block argument corresponding to the original/host value while
+ // second block argument corresponding to the privatized value.
+ mlir::Block *copyEntryBlock = firOpBuilder.createBlock(
+ ©Region, /*insertPt=*/{}, {symType, symType}, {symLoc, symLoc});
+ firOpBuilder.setInsertionPointToEnd(copyEntryBlock);
+ symTable->addSymbol(*sym, copyRegion.getArgument(0),
+ /*force=*/true);
+ symTable->pushScope();
+ symTable->addSymbol(*sym, copyRegion.getArgument(1));
+ auto ip = firOpBuilder.saveInsertionPoint();
+ copyFirstPrivateSymbol(sym, &ip);
+
+ firOpBuilder.create<mlir::omp::YieldOp>(
+ hsb.getAddr().getLoc(),
+ symTable->shallowLookupSymbol(*sym).getAddr());
+ symTable->popScope();
+ }
+
+ symTable->popScope();
+ firOpBuilder.restoreInsertionPoint(ip);
+ return result;
+ }();
+
+ delayedPrivatizationInfo.privatizers.push_back(
+ mlir::SymbolRefAttr::get(privatizerOp));
+ delayedPrivatizationInfo.hostAddresses.push_back(hsb.getAddr());
+ delayedPrivatizationInfo.hostSymbols.push_back(sym);
}
//===----------------------------------------------------------------------===//
@@ -2585,6 +2697,7 @@ genOrderedRegionOp(Fortran::lower::AbstractConverter &converter,
static mlir::omp::ParallelOp
genParallelOp(Fortran::lower::AbstractConverter &converter,
+ Fortran::lower::SymMap &symTable,
Fortran::semantics::SemanticsContext &semaCtx,
Fortran::lower::pft::Evaluation &eval, bool genNested,
mlir::Location currentLocation,
@@ -2617,8 +2730,8 @@ genParallelOp(Fortran::lower::AbstractConverter &converter,
auto reductionCallback = [&](mlir::Operation *op) {
llvm::SmallVector<mlir::Location> locs(reductionVars.size(),
currentLocation);
- auto block = converter.getFirOpBuilder().createBlock(&op->getRegion(0), {},
- reductionTypes, locs);
+ auto *block = converter.getFirOpBuilder().createBlock(&op->getRegion(0), {},
+ reductionTypes, locs);
for (auto [arg, prv] :
llvm::zip_equal(reductionSymbols, block->getArguments())) {
converter.bindSymbol(*arg, prv);
@@ -2626,13 +2739,78 @@ genParallelOp(Fortran::lower::AbstractConverter &converter,
return reductionSymbols;
};
- return genOpWithBody<mlir::omp::ParallelOp>(
+ OpWithBodyGenInfo genInfo =
OpWithBodyGenInfo(converter, semaCtx, currentLocation, eval)
.setGenNested(genNested)
.setOuterCombined(outerCombined)
.setClauses(&clauseList)
.setReductions(&reductionSymbols, &reductionTypes)
- .setGenRegionEntryCb(reductionCallback),
+ .setGenRegionEntryCb(reductionCallback);
+
+ if (!enableDelayedPrivatization) {
+ return genOpWithBody<mlir::omp::ParallelOp>(
+ genInfo,
+ /*resultTypes=*/mlir::TypeRange(), ifClauseOperand,
+ numThreadsClauseOperand, allocateOperands, allocatorOperands,
+ reductionVars,
+ reductionDeclSymbols.empty()
+ ? nullptr
+ : mlir::ArrayAttr::get(converter.getFirOpBuilder().getContext(),
+ reductionDeclSymbols),
+ procBindKindAttr, /*private_vars=*/llvm::SmallVector<mlir::Value>{},
+ /*privatizers=*/nullptr);
+ }
+
+ bool privatize = !outerCombined;
+ DataSharingProcessor dsp(converter, clauseList, eval,
+ /*useDelayedPrivatization=*/true, &symTable);
+
+ if (privatize)
+ dsp.processStep1();
+
+ const auto &delayedPrivatizationInfo = dsp.getDelayedPrivatizationInfo();
+
+ auto genRegionEntryCB = [&](mlir::Operation *op) {
+ auto parallelOp = llvm::cast<mlir::omp::ParallelOp>(op);
+
+ llvm::SmallVector<mlir::Location> reductionLocs(reductionVars.size(),
+ currentLocation);
+
+ auto privateVars = parallelOp.getPrivateVars();
+ auto ®ion = parallelOp.getRegion();
+
+ llvm::SmallVector<mlir::Type> privateVarTypes = reductionTypes;
+ privateVarTypes.reserve(privateVars.size());
+ llvm::transform(privateVars, std::back_inserter(privateVarTypes),
+ [](mlir::Value v) { return v.getType(); });
+
+ llvm::SmallVector<mlir::Location> privateVarLocs = reductionLocs;
+ privateVarLocs.reserve(privateVars.size());
+ llvm::transform(privateVars, std::back_inserter(privateVarLocs),
+ [](mlir::Value v) { return v.getLoc(); });
+
+ converter.getFirOpBuilder().createBlock(®ion, /*insertPt=*/{},
+ privateVarTypes, privateVarLocs);
+
+ llvm::SmallVector<const Fortran::semantics::Symbol *> allSymbols =
+ reductionSymbols;
+ allSymbols.append(delayedPrivatizationInfo.hostSymbols);
+ for (auto [arg, prv] : llvm::zip_equal(allSymbols, region.getArguments())) {
+ converter.bindSymbol(*arg, prv);
+ }
+
+ return allSymbols;
+ };
+
+ // TODO Merge with the reduction CB.
+ genInfo.setGenRegionEntryCb(genRegionEntryCB).setDataSharingProcessor(&dsp);
+
+ llvm::SmallVector<mlir::Attribute> privatizers(
+ delayedPrivatizationInfo.privatizers.begin(),
+ delayedPrivatizationInfo.privatizers.end());
+
+ return genOpWithBody<mlir::omp::ParallelOp>(
+ genInfo,
/*resultTypes=*/mlir::TypeRange(), ifClauseOperand,
numThreadsClauseOperand, allocateOperands, allocatorOperands,
reductionVars,
@@ -2640,8 +2818,11 @@ genParallelOp(Fortran::lower::AbstractConverter &converter,
? nullptr
: mlir::ArrayAttr::get(converter.getFirOpBuilder().getContext(),
reductionDeclSymbols),
- procBindKindAttr, /*private_vars=*/llvm::SmallVector<mlir::Value>{},
- /*privatizers=*/nullptr);
+ procBindKindAttr, delayedPrivatizationInfo.hostAddresses,
+ delayedPrivatizationInfo.privatizers.empty()
+ ? nullptr
+ : mlir::ArrayAttr::get(converter.getFirOpBuilder().getContext(),
+ privatizers));
}
static mlir::omp::SectionOp
@@ -3633,7 +3814,7 @@ static void genOMP(Fortran::lower::AbstractConverter &converter,
if ((llvm::omp::allParallelSet & llvm::omp::loopConstructSet)
.test(ompDirective)) {
validDirective = true;
- genParallelOp(converter, semaCtx, eval, /*genNested=*/false,
+ genParallelOp(converter, symTable, semaCtx, eval, /*genNested=*/false,
currentLocation, loopOpClauseList,
/*outerCombined=*/true);
}
@@ -3722,8 +3903,8 @@ genOMP(Fortran::lower::AbstractConverter &converter,
currentLocation);
break;
case llvm::omp::Directive::OMPD_parallel:
- genParallelOp(converter, semaCtx, eval, /*genNested=*/true, currentLocation,
- beginClauseList);
+ genParallelOp(converter, symTable, semaCtx, eval, /*genNested=*/true,
+ currentLocation, beginClauseList);
break;
case llvm::omp::Directive::OMPD_single:
genSingleOp(converter, semaCtx, eval, /*genNested=*/true, currentLocation,
@@ -3780,7 +3961,7 @@ genOMP(Fortran::lower::AbstractConverter &converter,
.test(directive.v)) {
bool outerCombined =
directive.v != llvm::omp::Directive::OMPD_target_parallel;
- genParallelOp(converter, semaCtx, eval, /*genNested=*/false,
+ genParallelOp(converter, symTable, semaCtx, eval, /*genNested=*/false,
currentLocation, beginClauseList, outerCombined);
combinedDirective = true;
}
@@ -3863,7 +4044,7 @@ genOMP(Fortran::lower::AbstractConverter &converter,
// Parallel wrapper of PARALLEL SECTIONS construct
if (dir == llvm::omp::Directive::OMPD_parallel_sections) {
- genParallelOp(converter, semaCtx, eval,
+ genParallelOp(converter, symTable, semaCtx, eval,
/*genNested=*/false, currentLocation, sectionsClauseList,
/*outerCombined=*/true);
} else {
diff --git a/flang/test/Lower/OpenMP/FIR/delayed-privatization-firstprivate.f90 b/flang/test/Lower/OpenMP/FIR/delayed-privatization-firstprivate.f90
new file mode 100644
index 00000000000000..21ffc1d008e313
--- /dev/null
+++ b/flang/test/Lower/OpenMP/FIR/delayed-privatization-firstprivate.f90
@@ -0,0 +1,26 @@
+! Test delayed privatization for the `private` clause.
+
+! RUN: bbc -emit-fir -hlfir=false -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+
+subroutine delayed_privatization_firstprivate
+ implicit none
+ integer :: var1
+
+!$OMP PARALLEL FIRSTPRIVATE(var1)
+ var1 = 10
+!$OMP END PARALLEL
+end subroutine
+
+! CHECK-LABEL: omp.private {type = firstprivate}
+! CHECK-SAME: @[[VAR1_PRIVATIZER_SYM:.*]] : !fir.ref<i32> alloc {
+! CHECK: } copy {
+! CHECK: ^bb0(%[[PRIV_ORIG_ARG:.*]]: !fir.ref<i32>, %[[PRIV_PRIV_ARG:.*]]: !fir.ref<i32>):
+! CHECK: %[[ORIG_VAL:.*]] = fir.load %[[PRIV_ORIG_ARG]] : !fir.ref<i32>
+! CHECK: fir.store %[[ORIG_VAL]] to %[[PRIV_PRIV_ARG]] : !fir.ref<i32>
+! CHECK: omp.yield(%[[PRIV_PRIV_ARG]] : !fir.ref<i32>)
+! CHECK: }
+
+! CHECK-LABEL: @_QPdelayed_privatization_firstprivate
+! CHECK: omp.parallel private(@[[VAR1_PRIVATIZER_SYM]] %{{.*}} -> %{{.*}} : !fir.ref<i32>) {
+! CHECK: omp.terminator
+
diff --git a/flang/test/Lower/OpenMP/FIR/delayed-privatization-private.f90 b/flang/test/Lower/OpenMP/FIR/delayed-privatization-private.f90
new file mode 100644
index 00000000000000..91eaa092f11d69
--- /dev/null
+++ b/flang/test/Lower/OpenMP/FIR/delayed-privatization-private.f90
@@ -0,0 +1,38 @@
+! Test delayed privatization for the `private` clause.
+
+! RUN: bbc -emit-fir -hlfir=false -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+
+subroutine delayed_privatization_private
+ implicit none
+ integer :: var1
+
+!$OMP PARALLEL PRIVATE(var1)
+ var1 = 10
+!$OMP END PARALLEL
+end subroutine
+
+! CHECK-LABEL: omp.private {type = private}
+! CHECK-SAME: @[[PRIVATIZER_SYM:.*]] : !fir.ref<i32> alloc {
+! CHECK-NEXT: ^bb0(%[[PRIV_ARG:.*]]: !fir.ref<i32>):
+! CHECK-NEXT: %[[PRIV_ALLOC:.*]] = fir.alloca i32 {bindc_name = "var1", pinned, uniq_name = "_QFdelayed_privatization_privateEvar1"}
+! CHECK-NEXT: omp.yield(%[[PRIV_ALLOC]] : !fir.ref<i32>)
+
+! CHECK-LABEL: @_QPdelayed_privatization_private
+! CHECK: %[[ORIG_ALLOC:.*]] = fir.alloca i32 {bindc_name = "var1", uniq_name = "_QFdelayed_privatization_privateEvar1"}
+! CHECK: omp.parallel private(@[[PRIVATIZER_SYM]] %[[ORIG_ALLOC]] -> %[[PAR_ARG:.*]] : !fir.ref<i32>) {
+! CHECK: fir.store %{{.*}} to %[[PAR_ARG]] : !fir.ref<i32>
+! CHECK: omp.terminator
+
+! Test that the same privatizer is used if the a variable with the same type and
+! name was previously privatized.
+subroutine delayed_privatization_private_same_type_and_name
+ implicit none
+ integer :: var1
+
+!$OMP PARALLEL PRIVATE(var1)
+ var1 = 10
+!$OMP END PARALLEL
+end subroutine
+
+! CHECK-LABEL: @_QPdelayed_privatization_private_same_type_and_name
+! CHECK: omp.parallel private(@[[PRIVATIZER_SYM]] %[[ORIG_ALLOC]] -> %[[PAR_ARG:.*]] : !fir.ref<i32>) {
diff --git a/flang/test/Lower/OpenMP/FIR/parallel-reduction-private.f90 b/flang/test/Lower/OpenMP/FIR/parallel-reduction-private.f90
new file mode 100644
index 00000000000000..d72093c8eb73ef
--- /dev/null
+++ b/flang/test/Lower/OpenMP/FIR/parallel-reduction-private.f90
@@ -0,0 +1,30 @@
+! Test that reductions and delayed privatization work properly togehter. Since
+! both types of clauses add block arguments to the OpenMP region, we make sure
+! that the block arguments are added in the proper order (reductions first and
+! then delayed privatization.
+
+! RUN: bbc -emit-fir -hlfir=false -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+
+subroutine red_and_delayed_private
+ integer :: red
+ integer :: prv
+
+ red = 0
+ prv = 10
+
+ !$omp parallel reduction(+:red) private(prv)
+ red = red + 1
+ prv = 20
+ !$omp end parallel
+end subroutine
+
+! CHECK-LABEL: omp.private {type = private}
+! CHECK-SAME: @[[PRIVATIZER_SYM:.*]] : !fir.ref<i32> alloc {
+
+! CHECK-LABEL: omp.reduction.declare
+! CHECK-SAME: @[[REDUCTION_SYM:.*]] : i32 init
+
+! CHECK-LABEL: _QPred_and_delayed_private
+! CHECK: omp.parallel
+! CHECK-SAME: reduction(@[[REDUCTION_SYM]] %{{.*}} -> %arg0 : !fir.ref<i32>)
+! CHECK-SAME: private(@[[PRIVATIZER_SYM]] %{{.*}} -> %arg1 : !fir.ref<i32>) {
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