https://github.com/ivanradanov updated
https://github.com/llvm/llvm-project/pull/104748
>From 4257950e7df8d7eaf92a1a7b02f89422007ffe6a Mon Sep 17 00:00:00 2001
From: Ivan Radanov Ivanov <ivanov.i...@m.titech.ac.jp>
Date: Sat, 19 Oct 2024 23:32:27 +0900
Subject: [PATCH 1/7] Do not emit empty omp.single's
---
flang/lib/Optimizer/OpenMP/LowerWorkshare.cpp | 50 ++++++++++++-------
.../OpenMP/lower-workshare-no-single.mlir | 20 ++++++++
2 files changed, 52 insertions(+), 18 deletions(-)
create mode 100644 flang/test/Transforms/OpenMP/lower-workshare-no-single.mlir
diff --git a/flang/lib/Optimizer/OpenMP/LowerWorkshare.cpp
b/flang/lib/Optimizer/OpenMP/LowerWorkshare.cpp
index aa4371b3af6f7d..225c585a02d913 100644
--- a/flang/lib/Optimizer/OpenMP/LowerWorkshare.cpp
+++ b/flang/lib/Optimizer/OpenMP/LowerWorkshare.cpp
@@ -239,11 +239,12 @@ static void parallelizeRegion(Region &sourceRegion,
Region &targetRegion,
return alloc;
};
- auto moveToSingle = [&](SingleRegion sr, OpBuilder allocaBuilder,
- OpBuilder singleBuilder,
- OpBuilder parallelBuilder) -> SmallVector<Value> {
+ auto moveToSingle =
+ [&](SingleRegion sr, OpBuilder allocaBuilder, OpBuilder singleBuilder,
+ OpBuilder parallelBuilder) -> std::pair<bool, SmallVector<Value>> {
IRMapping singleMapping = rootMapping;
SmallVector<Value> copyPrivate;
+ bool allParallelized = true;
for (Operation &op : llvm::make_range(sr.begin, sr.end)) {
if (isSafeToParallelize(&op)) {
@@ -267,6 +268,7 @@ static void parallelizeRegion(Region &sourceRegion, Region
&targetRegion,
assert(llvm::all_of(op.getResults(), [&](Value v) {
return !isTransitivelyUsedOutside(v, sr);
}));
+ allParallelized = false;
}
} else if (auto alloca = dyn_cast<fir::AllocaOp>(&op)) {
auto hoisted =
@@ -274,6 +276,7 @@ static void parallelizeRegion(Region &sourceRegion, Region
&targetRegion,
rootMapping.map(&*alloca, &*hoisted);
rootMapping.map(alloca.getResult(), hoisted.getResult());
copyPrivate.push_back(hoisted);
+ allParallelized = false;
} else {
singleBuilder.clone(op, singleMapping);
// Prepare reloaded values for results of operations that cannot be
@@ -286,10 +289,11 @@ static void parallelizeRegion(Region &sourceRegion,
Region &targetRegion,
copyPrivate.push_back(alloc);
}
}
+ allParallelized = false;
}
}
singleBuilder.create<omp::TerminatorOp>(loc);
- return copyPrivate;
+ return {allParallelized, copyPrivate};
};
for (Block &block : sourceRegion) {
@@ -343,25 +347,35 @@ static void parallelizeRegion(Region &sourceRegion,
Region &targetRegion,
Block *parallelBlock = new Block();
parallelBuilder.setInsertionPointToStart(parallelBlock);
- omp::SingleOperands singleOperands;
- if (isLast)
- singleOperands.nowait = rootBuilder.getUnitAttr();
- singleOperands.copyprivateVars =
+ auto [allParallelized, copyprivateVars] =
moveToSingle(std::get<SingleRegion>(opOrSingle), allocaBuilder,
singleBuilder, parallelBuilder);
- cleanupBlock(singleBlock);
- for (auto var : singleOperands.copyprivateVars) {
- mlir::func::FuncOp funcOp =
- createCopyFunc(loc, var.getType(), firCopyFuncBuilder);
- singleOperands.copyprivateSyms.push_back(SymbolRefAttr::get(funcOp));
+ if (allParallelized) {
+ // The single region was not required as all operations were safe to
+ // parallelize
+ assert(copyprivateVars.empty());
+ assert(allocaBlock->empty());
+ delete singleBlock;
+ } else {
+ omp::SingleOperands singleOperands;
+ if (isLast)
+ singleOperands.nowait = rootBuilder.getUnitAttr();
+ singleOperands.copyprivateVars = copyprivateVars;
+ cleanupBlock(singleBlock);
+ for (auto var : singleOperands.copyprivateVars) {
+ mlir::func::FuncOp funcOp =
+ createCopyFunc(loc, var.getType(), firCopyFuncBuilder);
+ singleOperands.copyprivateSyms.push_back(
+ SymbolRefAttr::get(funcOp));
+ }
+ omp::SingleOp singleOp =
+ rootBuilder.create<omp::SingleOp>(loc, singleOperands);
+ singleOp.getRegion().push_back(singleBlock);
+ targetRegion.front().getOperations().splice(
+ singleOp->getIterator(), allocaBlock->getOperations());
}
- omp::SingleOp singleOp =
- rootBuilder.create<omp::SingleOp>(loc, singleOperands);
- singleOp.getRegion().push_back(singleBlock);
rootBuilder.getInsertionBlock()->getOperations().splice(
rootBuilder.getInsertionPoint(), parallelBlock->getOperations());
- targetRegion.front().getOperations().splice(
- singleOp->getIterator(), allocaBlock->getOperations());
delete allocaBlock;
delete parallelBlock;
} else {
diff --git a/flang/test/Transforms/OpenMP/lower-workshare-no-single.mlir
b/flang/test/Transforms/OpenMP/lower-workshare-no-single.mlir
new file mode 100644
index 00000000000000..3e73816e63ace3
--- /dev/null
+++ b/flang/test/Transforms/OpenMP/lower-workshare-no-single.mlir
@@ -0,0 +1,20 @@
+// RUN: fir-opt --split-input-file --lower-workshare
--allow-unregistered-dialect %s | FileCheck %s
+
+// Check that we do not emit an omp.single for the constant operation
+
+func.func @foo() {
+ omp.workshare {
+ %c1 = arith.constant 1 : index
+ omp.workshare.loop_wrapper {
+ omp.loop_nest (%arg1) : index = (%c1) to (%c1) inclusive step (%c1) {
+ "test.test0"() : () -> ()
+ omp.yield
+ }
+ omp.terminator
+ }
+ omp.terminator
+ }
+ return
+}
+
+// CHECK-NOT: omp.single
>From 28f0a6f94f73bacaf28070dbbb9004d17cba4774 Mon Sep 17 00:00:00 2001
From: Ivan Radanov Ivanov <ivanov.i...@m.titech.ac.jp>
Date: Sun, 4 Aug 2024 17:33:52 +0900
Subject: [PATCH 2/7] Add workshare loop wrapper lowerings
Bufferize test
Bufferize test
Bufferize test
Add test for should use workshare lowering
---
.../HLFIR/Transforms/BufferizeHLFIR.cpp | 4 +-
.../Transforms/OptimizedBufferization.cpp | 10 +-
flang/test/HLFIR/bufferize-workshare.fir | 58 ++++++++
.../OpenMP/should-use-workshare-lowering.mlir | 140 ++++++++++++++++++
4 files changed, 208 insertions(+), 4 deletions(-)
create mode 100644 flang/test/HLFIR/bufferize-workshare.fir
create mode 100644
flang/test/Transforms/OpenMP/should-use-workshare-lowering.mlir
diff --git a/flang/lib/Optimizer/HLFIR/Transforms/BufferizeHLFIR.cpp
b/flang/lib/Optimizer/HLFIR/Transforms/BufferizeHLFIR.cpp
index 07794828fce267..1848dbe2c7a2c2 100644
--- a/flang/lib/Optimizer/HLFIR/Transforms/BufferizeHLFIR.cpp
+++ b/flang/lib/Optimizer/HLFIR/Transforms/BufferizeHLFIR.cpp
@@ -26,6 +26,7 @@
#include "flang/Optimizer/HLFIR/HLFIRDialect.h"
#include "flang/Optimizer/HLFIR/HLFIROps.h"
#include "flang/Optimizer/HLFIR/Passes.h"
+#include "flang/Optimizer/OpenMP/Passes.h"
#include "mlir/Dialect/OpenMP/OpenMPDialect.h"
#include "mlir/IR/Dominance.h"
#include "mlir/IR/PatternMatch.h"
@@ -792,7 +793,8 @@ struct ElementalOpConversion
// Generate a loop nest looping around the fir.elemental shape and clone
// fir.elemental region inside the inner loop.
hlfir::LoopNest loopNest =
- hlfir::genLoopNest(loc, builder, extents, !elemental.isOrdered());
+ hlfir::genLoopNest(loc, builder, extents, !elemental.isOrdered(),
+ flangomp::shouldUseWorkshareLowering(elemental));
auto insPt = builder.saveInsertionPoint();
builder.setInsertionPointToStart(loopNest.body);
auto yield = hlfir::inlineElementalOp(loc, builder, elemental,
diff --git a/flang/lib/Optimizer/HLFIR/Transforms/OptimizedBufferization.cpp
b/flang/lib/Optimizer/HLFIR/Transforms/OptimizedBufferization.cpp
index 3a0a98dc594463..f014724861e333 100644
--- a/flang/lib/Optimizer/HLFIR/Transforms/OptimizedBufferization.cpp
+++ b/flang/lib/Optimizer/HLFIR/Transforms/OptimizedBufferization.cpp
@@ -20,6 +20,7 @@
#include "flang/Optimizer/HLFIR/HLFIRDialect.h"
#include "flang/Optimizer/HLFIR/HLFIROps.h"
#include "flang/Optimizer/HLFIR/Passes.h"
+#include "flang/Optimizer/OpenMP/Passes.h"
#include "flang/Optimizer/Transforms/Utils.h"
#include "mlir/Dialect/Func/IR/FuncOps.h"
#include "mlir/IR/Dominance.h"
@@ -482,7 +483,8 @@ llvm::LogicalResult
ElementalAssignBufferization::matchAndRewrite(
// Generate a loop nest looping around the hlfir.elemental shape and clone
// hlfir.elemental region inside the inner loop
hlfir::LoopNest loopNest =
- hlfir::genLoopNest(loc, builder, extents, !elemental.isOrdered());
+ hlfir::genLoopNest(loc, builder, extents, !elemental.isOrdered(),
+ flangomp::shouldUseWorkshareLowering(elemental));
builder.setInsertionPointToStart(loopNest.body);
auto yield = hlfir::inlineElementalOp(loc, builder, elemental,
loopNest.oneBasedIndices);
@@ -553,7 +555,8 @@ llvm::LogicalResult
BroadcastAssignBufferization::matchAndRewrite(
llvm::SmallVector<mlir::Value> extents =
hlfir::getIndexExtents(loc, builder, shape);
hlfir::LoopNest loopNest =
- hlfir::genLoopNest(loc, builder, extents, /*isUnordered=*/true);
+ hlfir::genLoopNest(loc, builder, extents, /*isUnordered=*/true,
+ flangomp::shouldUseWorkshareLowering(assign));
builder.setInsertionPointToStart(loopNest.body);
auto arrayElement =
hlfir::getElementAt(loc, builder, lhs, loopNest.oneBasedIndices);
@@ -648,7 +651,8 @@ llvm::LogicalResult
VariableAssignBufferization::matchAndRewrite(
llvm::SmallVector<mlir::Value> extents =
hlfir::getIndexExtents(loc, builder, shape);
hlfir::LoopNest loopNest =
- hlfir::genLoopNest(loc, builder, extents, /*isUnordered=*/true);
+ hlfir::genLoopNest(loc, builder, extents, /*isUnordered=*/true,
+ flangomp::shouldUseWorkshareLowering(assign));
builder.setInsertionPointToStart(loopNest.body);
auto rhsArrayElement =
hlfir::getElementAt(loc, builder, rhs, loopNest.oneBasedIndices);
diff --git a/flang/test/HLFIR/bufferize-workshare.fir
b/flang/test/HLFIR/bufferize-workshare.fir
new file mode 100644
index 00000000000000..9b7341ae43398a
--- /dev/null
+++ b/flang/test/HLFIR/bufferize-workshare.fir
@@ -0,0 +1,58 @@
+// RUN: fir-opt --bufferize-hlfir %s | FileCheck %s
+
+// CHECK-LABEL: func.func @simple(
+// CHECK-SAME: %[[VAL_0:.*]]:
!fir.ref<!fir.array<42xi32>>) {
+// CHECK: omp.parallel {
+// CHECK: omp.workshare {
+// CHECK: %[[VAL_1:.*]] = arith.constant 42 : index
+// CHECK: %[[VAL_2:.*]] = arith.constant 1 : i32
+// CHECK: %[[VAL_3:.*]] = fir.shape %[[VAL_1]] : (index) ->
!fir.shape<1>
+// CHECK: %[[VAL_4:.*]]:2 = hlfir.declare %[[VAL_0]](%[[VAL_3]])
{uniq_name = "array"} : (!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) ->
(!fir.ref<!fir.array<42xi32>>, !fir.ref<!fir.array<42xi32>>)
+// CHECK: %[[VAL_5:.*]] = fir.allocmem !fir.array<42xi32>
{bindc_name = ".tmp.array", uniq_name = ""}
+// CHECK: %[[VAL_6:.*]]:2 = hlfir.declare %[[VAL_5]](%[[VAL_3]])
{uniq_name = ".tmp.array"} : (!fir.heap<!fir.array<42xi32>>, !fir.shape<1>) ->
(!fir.heap<!fir.array<42xi32>>, !fir.heap<!fir.array<42xi32>>)
+// CHECK: %[[VAL_7:.*]] = arith.constant true
+// CHECK: %[[VAL_8:.*]] = arith.constant 1 : index
+// CHECK: omp.workshare.loop_wrapper {
+// CHECK: omp.loop_nest (%[[VAL_9:.*]]) : index = (%[[VAL_8]])
to (%[[VAL_1]]) inclusive step (%[[VAL_8]]) {
+// CHECK: %[[VAL_10:.*]] = hlfir.designate %[[VAL_4]]#0
(%[[VAL_9]]) : (!fir.ref<!fir.array<42xi32>>, index) -> !fir.ref<i32>
+// CHECK: %[[VAL_11:.*]] = fir.load %[[VAL_10]] :
!fir.ref<i32>
+// CHECK: %[[VAL_12:.*]] = arith.subi %[[VAL_11]],
%[[VAL_2]] : i32
+// CHECK: %[[VAL_13:.*]] = hlfir.designate %[[VAL_6]]#0
(%[[VAL_9]]) : (!fir.heap<!fir.array<42xi32>>, index) -> !fir.ref<i32>
+// CHECK: hlfir.assign %[[VAL_12]] to %[[VAL_13]]
temporary_lhs : i32, !fir.ref<i32>
+// CHECK: omp.yield
+// CHECK: }
+// CHECK: omp.terminator
+// CHECK: }
+// CHECK: %[[VAL_14:.*]] = fir.undefined
tuple<!fir.heap<!fir.array<42xi32>>, i1>
+// CHECK: %[[VAL_15:.*]] = fir.insert_value %[[VAL_14]],
%[[VAL_7]], [1 : index] : (tuple<!fir.heap<!fir.array<42xi32>>, i1>, i1) ->
tuple<!fir.heap<!fir.array<42xi32>>, i1>
+// CHECK: %[[VAL_16:.*]] = fir.insert_value %[[VAL_15]],
%[[VAL_6]]#0, [0 : index] : (tuple<!fir.heap<!fir.array<42xi32>>, i1>,
!fir.heap<!fir.array<42xi32>>) -> tuple<!fir.heap<!fir.array<42xi32>>, i1>
+// CHECK: hlfir.assign %[[VAL_6]]#0 to %[[VAL_4]]#0 :
!fir.heap<!fir.array<42xi32>>, !fir.ref<!fir.array<42xi32>>
+// CHECK: fir.freemem %[[VAL_6]]#0 :
!fir.heap<!fir.array<42xi32>>
+// CHECK: omp.terminator
+// CHECK: }
+// CHECK: omp.terminator
+// CHECK: }
+// CHECK: return
+// CHECK: }
+func.func @simple(%arg: !fir.ref<!fir.array<42xi32>>) {
+ omp.parallel {
+ omp.workshare {
+ %c42 = arith.constant 42 : index
+ %c1_i32 = arith.constant 1 : i32
+ %shape = fir.shape %c42 : (index) -> !fir.shape<1>
+ %array:2 = hlfir.declare %arg(%shape) {uniq_name = "array"} :
(!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<42xi32>>,
!fir.ref<!fir.array<42xi32>>)
+ %elemental = hlfir.elemental %shape unordered : (!fir.shape<1>) ->
!hlfir.expr<42xi32> {
+ ^bb0(%i: index):
+ %ref = hlfir.designate %array#0 (%i) : (!fir.ref<!fir.array<42xi32>>,
index) -> !fir.ref<i32>
+ %val = fir.load %ref : !fir.ref<i32>
+ %sub = arith.subi %val, %c1_i32 : i32
+ hlfir.yield_element %sub : i32
+ }
+ hlfir.assign %elemental to %array#0 : !hlfir.expr<42xi32>,
!fir.ref<!fir.array<42xi32>>
+ hlfir.destroy %elemental : !hlfir.expr<42xi32>
+ omp.terminator
+ }
+ omp.terminator
+ }
+ return
+}
diff --git a/flang/test/Transforms/OpenMP/should-use-workshare-lowering.mlir
b/flang/test/Transforms/OpenMP/should-use-workshare-lowering.mlir
new file mode 100644
index 00000000000000..229fe592a02b9b
--- /dev/null
+++ b/flang/test/Transforms/OpenMP/should-use-workshare-lowering.mlir
@@ -0,0 +1,140 @@
+// RUN: fir-opt --bufferize-hlfir %s | FileCheck %s
+
+// Checks that we correctly identify when to use the lowering to
+// omp.workshare.loop_wrapper
+
+// CHECK-LABEL: @should_parallelize_0
+// CHECK: omp.workshare.loop_wrapper
+func.func @should_parallelize_0(%arg: !fir.ref<!fir.array<42xi32>>, %idx :
index) {
+ omp.workshare {
+ %c42 = arith.constant 42 : index
+ %c1_i32 = arith.constant 1 : i32
+ %shape = fir.shape %c42 : (index) -> !fir.shape<1>
+ %array:2 = hlfir.declare %arg(%shape) {uniq_name = "array"} :
(!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<42xi32>>,
!fir.ref<!fir.array<42xi32>>)
+ %elemental = hlfir.elemental %shape unordered : (!fir.shape<1>) ->
!hlfir.expr<42xi32> {
+ ^bb0(%i: index):
+ hlfir.yield_element %c1_i32 : i32
+ }
+ hlfir.assign %elemental to %array#0 : !hlfir.expr<42xi32>,
!fir.ref<!fir.array<42xi32>>
+ hlfir.destroy %elemental : !hlfir.expr<42xi32>
+ omp.terminator
+ }
+ return
+}
+
+// CHECK-LABEL: @should_parallelize_1
+// CHECK: omp.workshare.loop_wrapper
+func.func @should_parallelize_1(%arg: !fir.ref<!fir.array<42xi32>>, %idx :
index) {
+ omp.parallel {
+ omp.workshare {
+ %c42 = arith.constant 42 : index
+ %c1_i32 = arith.constant 1 : i32
+ %shape = fir.shape %c42 : (index) -> !fir.shape<1>
+ %array:2 = hlfir.declare %arg(%shape) {uniq_name = "array"} :
(!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<42xi32>>,
!fir.ref<!fir.array<42xi32>>)
+ %elemental = hlfir.elemental %shape unordered : (!fir.shape<1>) ->
!hlfir.expr<42xi32> {
+ ^bb0(%i: index):
+ hlfir.yield_element %c1_i32 : i32
+ }
+ hlfir.assign %elemental to %array#0 : !hlfir.expr<42xi32>,
!fir.ref<!fir.array<42xi32>>
+ hlfir.destroy %elemental : !hlfir.expr<42xi32>
+ omp.terminator
+ }
+ omp.terminator
+ }
+ return
+}
+
+
+// CHECK-LABEL: @should_not_parallelize_0
+// CHECK-NOT: omp.workshare.loop_wrapper
+func.func @should_not_parallelize_0(%arg: !fir.ref<!fir.array<42xi32>>, %idx :
index) {
+ omp.workshare {
+ omp.single {
+ %c42 = arith.constant 42 : index
+ %c1_i32 = arith.constant 1 : i32
+ %shape = fir.shape %c42 : (index) -> !fir.shape<1>
+ %array:2 = hlfir.declare %arg(%shape) {uniq_name = "array"} :
(!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<42xi32>>,
!fir.ref<!fir.array<42xi32>>)
+ %elemental = hlfir.elemental %shape unordered : (!fir.shape<1>) ->
!hlfir.expr<42xi32> {
+ ^bb0(%i: index):
+ hlfir.yield_element %c1_i32 : i32
+ }
+ hlfir.assign %elemental to %array#0 : !hlfir.expr<42xi32>,
!fir.ref<!fir.array<42xi32>>
+ hlfir.destroy %elemental : !hlfir.expr<42xi32>
+ omp.terminator
+ }
+ omp.terminator
+ }
+ return
+}
+
+// CHECK-LABEL: @should_not_parallelize_1
+// CHECK-NOT: omp.workshare.loop_wrapper
+func.func @should_not_parallelize_1(%arg: !fir.ref<!fir.array<42xi32>>, %idx :
index) {
+ omp.workshare {
+ omp.critical {
+ %c42 = arith.constant 42 : index
+ %c1_i32 = arith.constant 1 : i32
+ %shape = fir.shape %c42 : (index) -> !fir.shape<1>
+ %array:2 = hlfir.declare %arg(%shape) {uniq_name = "array"} :
(!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<42xi32>>,
!fir.ref<!fir.array<42xi32>>)
+ %elemental = hlfir.elemental %shape unordered : (!fir.shape<1>) ->
!hlfir.expr<42xi32> {
+ ^bb0(%i: index):
+ hlfir.yield_element %c1_i32 : i32
+ }
+ hlfir.assign %elemental to %array#0 : !hlfir.expr<42xi32>,
!fir.ref<!fir.array<42xi32>>
+ hlfir.destroy %elemental : !hlfir.expr<42xi32>
+ omp.terminator
+ }
+ omp.terminator
+ }
+ return
+}
+
+// CHECK-LABEL: @should_not_parallelize_2
+// CHECK-NOT: omp.workshare.loop_wrapper
+func.func @should_not_parallelize_2(%arg: !fir.ref<!fir.array<42xi32>>, %idx :
index) {
+ omp.workshare {
+ omp.parallel {
+ %c42 = arith.constant 42 : index
+ %c1_i32 = arith.constant 1 : i32
+ %shape = fir.shape %c42 : (index) -> !fir.shape<1>
+ %array:2 = hlfir.declare %arg(%shape) {uniq_name = "array"} :
(!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<42xi32>>,
!fir.ref<!fir.array<42xi32>>)
+ %elemental = hlfir.elemental %shape unordered : (!fir.shape<1>) ->
!hlfir.expr<42xi32> {
+ ^bb0(%i: index):
+ hlfir.yield_element %c1_i32 : i32
+ }
+ hlfir.assign %elemental to %array#0 : !hlfir.expr<42xi32>,
!fir.ref<!fir.array<42xi32>>
+ hlfir.destroy %elemental : !hlfir.expr<42xi32>
+ omp.terminator
+ }
+ omp.terminator
+ }
+ return
+}
+
+// CHECK-LABEL: @should_not_parallelize_3
+// CHECK-NOT: omp.workshare.loop_wrapper
+func.func @should_not_parallelize_3(%arg: !fir.ref<!fir.array<42xi32>>, %idx :
index) {
+ omp.workshare {
+ omp.parallel {
+ omp.workshare {
+ omp.parallel {
+ %c42 = arith.constant 42 : index
+ %c1_i32 = arith.constant 1 : i32
+ %shape = fir.shape %c42 : (index) -> !fir.shape<1>
+ %array:2 = hlfir.declare %arg(%shape) {uniq_name = "array"} :
(!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<42xi32>>,
!fir.ref<!fir.array<42xi32>>)
+ %elemental = hlfir.elemental %shape unordered : (!fir.shape<1>) ->
!hlfir.expr<42xi32> {
+ ^bb0(%i: index):
+ hlfir.yield_element %c1_i32 : i32
+ }
+ hlfir.assign %elemental to %array#0 : !hlfir.expr<42xi32>,
!fir.ref<!fir.array<42xi32>>
+ hlfir.destroy %elemental : !hlfir.expr<42xi32>
+ omp.terminator
+ }
+ omp.terminator
+ }
+ omp.terminator
+ }
+ omp.terminator
+ }
+ return
+}
>From 088d3a7a335acb4478dd13c9674d1a185947bcd7 Mon Sep 17 00:00:00 2001
From: Ivan Radanov Ivanov <ivanov.i...@m.titech.ac.jp>
Date: Mon, 23 Sep 2024 12:56:11 +0900
Subject: [PATCH 3/7] Add integration test for workshare
---
flang/test/Integration/OpenMP/workshare.f90 | 57 +++++++++++++++++++++
1 file changed, 57 insertions(+)
create mode 100644 flang/test/Integration/OpenMP/workshare.f90
diff --git a/flang/test/Integration/OpenMP/workshare.f90
b/flang/test/Integration/OpenMP/workshare.f90
new file mode 100644
index 00000000000000..0c4524f8552906
--- /dev/null
+++ b/flang/test/Integration/OpenMP/workshare.f90
@@ -0,0 +1,57 @@
+!===----------------------------------------------------------------------===!
+! This directory can be used to add Integration tests involving multiple
+! stages of the compiler (for eg. from Fortran to LLVM IR). It should not
+! contain executable tests. We should only add tests here sparingly and only
+! if there is no other way to test. Repeat this message in each test that is
+! added to this directory and sub-directories.
+!===----------------------------------------------------------------------===!
+
+!RUN: %flang_fc1 -emit-hlfir -fopenmp -O3 %s -o - | FileCheck %s
--check-prefix HLFIR
+!RUN: %flang_fc1 -emit-fir -fopenmp -O3 %s -o - | FileCheck %s --check-prefix
FIR
+
+subroutine sb1(a, x, y, z)
+ integer :: a
+ integer :: x(:)
+ integer :: y(:)
+ integer :: z(:)
+ !$omp parallel workshare
+ z = a * x + y
+ !$omp end parallel workshare
+end subroutine
+
+! HLFIR: func.func @_QPsb1
+! HLFIR: omp.parallel {
+! HLFIR: omp.workshare {
+! HLFIR: hlfir.elemental {{.*}} unordered : (!fir.shape<1>) ->
!hlfir.expr<?xi32> {
+! HLFIR: hlfir.elemental {{.*}} unordered : (!fir.shape<1>) ->
!hlfir.expr<?xi32> {
+! HLFIR: hlfir.assign
+! HLFIR: hlfir.destroy
+! HLFIR: hlfir.destroy
+! HLFIR-NOT: omp.barrier
+! HLFIR: omp.terminator
+! HLFIR: }
+! HLFIR-NOT: omp.barrier
+! HLFIR: omp.terminator
+! HLFIR: }
+! HLFIR: return
+! HLFIR: }
+! HLFIR:}
+
+
+! FIR: func.func private @_workshare_copy_heap_Uxi32(%{{[a-z0-9]+}}:
!fir.ref<!fir.heap<!fir.array<?xi32>>>, %{{[a-z0-9]+}}:
!fir.ref<!fir.heap<!fir.array<?xi32>>>
+! FIR: func.func private @_workshare_copy_i32(%{{[a-z0-9]+}}: !fir.ref<i32>,
%{{[a-z0-9]+}}: !fir.ref<i32>
+
+! FIR: func.func @_QPsb1
+! FIR: omp.parallel {
+! FIR: omp.single copyprivate(%9 -> @_workshare_copy_i32 : !fir.ref<i32>,
%10 -> @_workshare_copy_heap_Uxi32 : !fir.ref<!fir.heap<!fir.array<?xi32>>>) {
+! FIR: fir.allocmem
+! FIR: omp.wsloop {
+! FIR: omp.loop_nest
+! FIR: omp.single nowait {
+! FIR: fir.call @_FortranAAssign
+! FIR: fir.freemem
+! FIR: omp.terminator
+! FIR: }
+! FIR: omp.barrier
+! FIR: omp.terminator
+! FIR: }
>From 2718382db02f7d4cfb3f0b356dee99a027a6dbd8 Mon Sep 17 00:00:00 2001
From: Ivan Radanov Ivanov <ivanov.i...@m.titech.ac.jp>
Date: Fri, 4 Oct 2024 15:02:54 +0900
Subject: [PATCH 4/7] One more integration test
---
.../OpenMP/workshare-scalar-array-mul.f90 | 67 +++++++++++++++++++
1 file changed, 67 insertions(+)
create mode 100644 flang/test/Integration/OpenMP/workshare-scalar-array-mul.f90
diff --git a/flang/test/Integration/OpenMP/workshare-scalar-array-mul.f90
b/flang/test/Integration/OpenMP/workshare-scalar-array-mul.f90
new file mode 100644
index 00000000000000..2fb9a029bf93a5
--- /dev/null
+++ b/flang/test/Integration/OpenMP/workshare-scalar-array-mul.f90
@@ -0,0 +1,67 @@
+!===----------------------------------------------------------------------===!
+! This directory can be used to add Integration tests involving multiple
+! stages of the compiler (for eg. from Fortran to LLVM IR). It should not
+! contain executable tests. We should only add tests here sparingly and only
+! if there is no other way to test. Repeat this message in each test that is
+! added to this directory and sub-directories.
+!===----------------------------------------------------------------------===!
+
+!RUN: %flang_fc1 -emit-hlfir -fopenmp -O3 %s -o - | FileCheck %s
--check-prefix HLFIR-O3
+!RUN: %flang_fc1 -emit-fir -fopenmp -O3 %s -o - | FileCheck %s --check-prefix
FIR-O3
+
+!RUN: %flang_fc1 -emit-hlfir -fopenmp -O0 %s -o - | FileCheck %s
--check-prefix HLFIR-O0
+!RUN: %flang_fc1 -emit-fir -fopenmp -O0 %s -o - | FileCheck %s --check-prefix
FIR-O0
+
+program test
+ real :: arr_01(10)
+ !$omp parallel workshare
+ arr_01 = arr_01*2
+ !$omp end parallel workshare
+end program
+
+! HLFIR-O3: omp.parallel {
+! HLFIR-O3: omp.workshare {
+! HLFIR-O3: hlfir.elemental
+! HLFIR-O3: hlfir.assign
+! HLFIR-O3: hlfir.destroy
+! HLFIR-O3: omp.terminator
+! HLFIR-O3: omp.terminator
+
+! FIR-O3: omp.parallel {
+! FIR-O3: omp.wsloop nowait {
+! FIR-O3: omp.loop_nest
+! FIR-O3: omp.terminator
+! FIR-O3: omp.barrier
+! FIR-O3: omp.terminator
+
+! HLFIR-O0: omp.parallel {
+! HLFIR-O0: omp.workshare {
+! HLFIR-O0: hlfir.elemental
+! HLFIR-O0: hlfir.assign
+! HLFIR-O0: hlfir.destroy
+! HLFIR-O0: omp.terminator
+! HLFIR-O0: omp.terminator
+
+! Check the copyprivate copy function
+! FIR-O0: func.func private @_workshare_copy_heap_{{.*}}(%[[DST:.*]]: {{.*}},
%[[SRC:.*]]: {{.*}})
+! FIR-O0: fir.load %[[SRC]]
+! FIR-O0: fir.store {{.*}} to %[[DST]]
+
+! Check that we properly handle the temporary array
+! FIR-O0: omp.parallel {
+! FIR-O0: %[[CP:.*]] = fir.alloca !fir.heap<!fir.array<10xf32>>
+! FIR-O0: omp.single copyprivate(%[[CP]] -> @_workshare_copy_heap_
+! FIR-O0: fir.allocmem
+! FIR-O0: fir.store
+! FIR-O0: omp.terminator
+! FIR-O0: fir.load %[[CP]]
+! FIR-O0: omp.wsloop {
+! FIR-O0: omp.loop_nest
+! FIR-O0: omp.yield
+! FIR-O0: omp.terminator
+! FIR-O0: omp.single nowait {
+! FIR-O0: fir.call @_FortranAAssign
+! FIR-O0: fir.freemem
+! FIR-O0: omp.terminator
+! FIR-O0: omp.barrier
+! FIR-O0: omp.terminator
>From 2fd6e88a960886a0b38ba0e64a6f7a65d744777d Mon Sep 17 00:00:00 2001
From: Ivan Radanov Ivanov <ivanov.i...@m.titech.ac.jp>
Date: Fri, 4 Oct 2024 15:12:43 +0900
Subject: [PATCH 5/7] Add test for cfg workshare bufferization
---
.../should-use-workshare-lowering-cfg.mlir | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)
create mode 100644
flang/test/Transforms/OpenMP/should-use-workshare-lowering-cfg.mlir
diff --git
a/flang/test/Transforms/OpenMP/should-use-workshare-lowering-cfg.mlir
b/flang/test/Transforms/OpenMP/should-use-workshare-lowering-cfg.mlir
new file mode 100644
index 00000000000000..8b6d8097caad87
--- /dev/null
+++ b/flang/test/Transforms/OpenMP/should-use-workshare-lowering-cfg.mlir
@@ -0,0 +1,22 @@
+// RUN: fir-opt --bufferize-hlfir %s 2>&1 | FileCheck %s
+
+// CHECK: warning: omp workshare with unstructured control flow currently
unsupported.
+func.func @warn_cfg(%arg: !fir.ref<!fir.array<42xi32>>, %idx : index) {
+ omp.workshare {
+ ^bb1:
+ %c42 = arith.constant 42 : index
+ %c1_i32 = arith.constant 1 : i32
+ %shape = fir.shape %c42 : (index) -> !fir.shape<1>
+ %array:2 = hlfir.declare %arg(%shape) {uniq_name = "array"} :
(!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<42xi32>>,
!fir.ref<!fir.array<42xi32>>)
+ %elemental = hlfir.elemental %shape unordered : (!fir.shape<1>) ->
!hlfir.expr<42xi32> {
+ ^bb0(%i: index):
+ hlfir.yield_element %c1_i32 : i32
+ }
+ hlfir.assign %elemental to %array#0 : !hlfir.expr<42xi32>,
!fir.ref<!fir.array<42xi32>>
+ hlfir.destroy %elemental : !hlfir.expr<42xi32>
+ cf.br ^bb2
+ ^bb2:
+ omp.terminator
+ }
+ return
+}
>From 6b1623e5d9ab1c669c183a730467bfb2db6849da Mon Sep 17 00:00:00 2001
From: Ivan Radanov Ivanov <ivanov.i...@m.titech.ac.jp>
Date: Fri, 4 Oct 2024 15:24:46 +0900
Subject: [PATCH 6/7] Fix tests
---
.../should-use-workshare-lowering-cfg.mlir | 22 -------------------
.../OpenMP/should-use-workshare-lowering.mlir | 22 +++++++++++++++++++
2 files changed, 22 insertions(+), 22 deletions(-)
delete mode 100644
flang/test/Transforms/OpenMP/should-use-workshare-lowering-cfg.mlir
diff --git
a/flang/test/Transforms/OpenMP/should-use-workshare-lowering-cfg.mlir
b/flang/test/Transforms/OpenMP/should-use-workshare-lowering-cfg.mlir
deleted file mode 100644
index 8b6d8097caad87..00000000000000
--- a/flang/test/Transforms/OpenMP/should-use-workshare-lowering-cfg.mlir
+++ /dev/null
@@ -1,22 +0,0 @@
-// RUN: fir-opt --bufferize-hlfir %s 2>&1 | FileCheck %s
-
-// CHECK: warning: omp workshare with unstructured control flow currently
unsupported.
-func.func @warn_cfg(%arg: !fir.ref<!fir.array<42xi32>>, %idx : index) {
- omp.workshare {
- ^bb1:
- %c42 = arith.constant 42 : index
- %c1_i32 = arith.constant 1 : i32
- %shape = fir.shape %c42 : (index) -> !fir.shape<1>
- %array:2 = hlfir.declare %arg(%shape) {uniq_name = "array"} :
(!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<42xi32>>,
!fir.ref<!fir.array<42xi32>>)
- %elemental = hlfir.elemental %shape unordered : (!fir.shape<1>) ->
!hlfir.expr<42xi32> {
- ^bb0(%i: index):
- hlfir.yield_element %c1_i32 : i32
- }
- hlfir.assign %elemental to %array#0 : !hlfir.expr<42xi32>,
!fir.ref<!fir.array<42xi32>>
- hlfir.destroy %elemental : !hlfir.expr<42xi32>
- cf.br ^bb2
- ^bb2:
- omp.terminator
- }
- return
-}
diff --git a/flang/test/Transforms/OpenMP/should-use-workshare-lowering.mlir
b/flang/test/Transforms/OpenMP/should-use-workshare-lowering.mlir
index 229fe592a02b9b..91b08123cce422 100644
--- a/flang/test/Transforms/OpenMP/should-use-workshare-lowering.mlir
+++ b/flang/test/Transforms/OpenMP/should-use-workshare-lowering.mlir
@@ -138,3 +138,25 @@ func.func @should_not_parallelize_3(%arg:
!fir.ref<!fir.array<42xi32>>, %idx : i
}
return
}
+
+// CHECK-LABEL: @should_not_parallelize_4
+// CHECK-NOT: omp.workshare.loop_wrapper
+func.func @should_not_parallelize_4(%arg: !fir.ref<!fir.array<42xi32>>, %idx :
index) {
+ omp.workshare {
+ ^bb1:
+ %c42 = arith.constant 42 : index
+ %c1_i32 = arith.constant 1 : i32
+ %shape = fir.shape %c42 : (index) -> !fir.shape<1>
+ %array:2 = hlfir.declare %arg(%shape) {uniq_name = "array"} :
(!fir.ref<!fir.array<42xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<42xi32>>,
!fir.ref<!fir.array<42xi32>>)
+ %elemental = hlfir.elemental %shape unordered : (!fir.shape<1>) ->
!hlfir.expr<42xi32> {
+ ^bb0(%i: index):
+ hlfir.yield_element %c1_i32 : i32
+ }
+ hlfir.assign %elemental to %array#0 : !hlfir.expr<42xi32>,
!fir.ref<!fir.array<42xi32>>
+ hlfir.destroy %elemental : !hlfir.expr<42xi32>
+ cf.br ^bb2
+ ^bb2:
+ omp.terminator
+ }
+ return
+}
>From 3a1ff2651ff74516bd16814bb5726976a79eb2a0 Mon Sep 17 00:00:00 2001
From: Ivan Radanov Ivanov <ivanov.i...@m.titech.ac.jp>
Date: Sat, 19 Oct 2024 23:30:42 +0900
Subject: [PATCH 7/7] Test coverage for all changes
---
.../OpenMP/workshare-array-array-assign.f90 | 35 ++++++++++++++
.../{workshare.f90 => workshare-axpy.f90} | 0
.../OpenMP/workshare-scalar-array-assign.f90 | 46 +++++++++++++++++++
3 files changed, 81 insertions(+)
create mode 100644
flang/test/Integration/OpenMP/workshare-array-array-assign.f90
rename flang/test/Integration/OpenMP/{workshare.f90 => workshare-axpy.f90}
(100%)
create mode 100644
flang/test/Integration/OpenMP/workshare-scalar-array-assign.f90
diff --git a/flang/test/Integration/OpenMP/workshare-array-array-assign.f90
b/flang/test/Integration/OpenMP/workshare-array-array-assign.f90
new file mode 100644
index 00000000000000..065f72d5d72d88
--- /dev/null
+++ b/flang/test/Integration/OpenMP/workshare-array-array-assign.f90
@@ -0,0 +1,35 @@
+!===----------------------------------------------------------------------===!
+! This directory can be used to add Integration tests involving multiple
+! stages of the compiler (for eg. from Fortran to LLVM IR). It should not
+! contain executable tests. We should only add tests here sparingly and only
+! if there is no other way to test. Repeat this message in each test that is
+! added to this directory and sub-directories.
+!===----------------------------------------------------------------------===!
+
+!RUN: %flang_fc1 -emit-hlfir -fopenmp -O3 %s -o - | FileCheck %s
--check-prefix HLFIR
+!RUN: %flang_fc1 -emit-fir -fopenmp -O3 %s -o - | FileCheck %s --check-prefix
FIR
+
+subroutine sb1(x, y)
+ integer :: x(:)
+ integer :: y(:)
+ !$omp parallel workshare
+ x = y
+ !$omp end parallel workshare
+end subroutine
+
+! HLFIR: omp.parallel {
+! HLFIR: omp.workshare {
+! HLFIR: hlfir.assign
+! HLFIR: omp.terminator
+! HLFIR: }
+! HLFIR: omp.terminator
+! HLFIR: }
+
+! FIR: omp.parallel {
+! FIR: omp.wsloop nowait {
+! FIR: omp.loop_nest
+! FIR: omp.terminator
+! FIR: }
+! FIR: omp.barrier
+! FIR: omp.terminator
+! FIR: }
diff --git a/flang/test/Integration/OpenMP/workshare.f90
b/flang/test/Integration/OpenMP/workshare-axpy.f90
similarity index 100%
rename from flang/test/Integration/OpenMP/workshare.f90
rename to flang/test/Integration/OpenMP/workshare-axpy.f90
diff --git a/flang/test/Integration/OpenMP/workshare-scalar-array-assign.f90
b/flang/test/Integration/OpenMP/workshare-scalar-array-assign.f90
new file mode 100644
index 00000000000000..fad1af110792bb
--- /dev/null
+++ b/flang/test/Integration/OpenMP/workshare-scalar-array-assign.f90
@@ -0,0 +1,46 @@
+!===----------------------------------------------------------------------===!
+! This directory can be used to add Integration tests involving multiple
+! stages of the compiler (for eg. from Fortran to LLVM IR). It should not
+! contain executable tests. We should only add tests here sparingly and only
+! if there is no other way to test. Repeat this message in each test that is
+! added to this directory and sub-directories.
+!===----------------------------------------------------------------------===!
+
+!RUN: %flang_fc1 -emit-hlfir -fopenmp -O3 %s -o - | FileCheck %s
--check-prefix HLFIR
+!RUN: %flang_fc1 -emit-fir -fopenmp -O3 %s -o - | FileCheck %s --check-prefix
FIR
+
+subroutine sb1(a, x)
+ integer :: a
+ integer :: x(:)
+ !$omp parallel workshare
+ x = a
+ !$omp end parallel workshare
+end subroutine
+
+! HLFIR: omp.parallel {
+! HLFIR: omp.workshare {
+! HLFIR: %[[SCALAR:.*]] = fir.load %1#0 : !fir.ref<i32>
+! HLFIR: hlfir.assign %[[SCALAR]] to
+! HLFIR: omp.terminator
+! HLFIR: }
+! HLFIR: omp.terminator
+! HLFIR: }
+
+! FIR: omp.parallel {
+! FIR: %[[SCALAR_ALLOCA:.*]] = fir.alloca i32
+! FIR: omp.single copyprivate(%[[SCALAR_ALLOCA]] -> @_workshare_copy_i32
: !fir.ref<i32>) {
+! FIR: %[[SCALAR_LOAD:.*]] = fir.load %{{.*}} : !fir.ref<i32>
+! FIR: fir.store %[[SCALAR_LOAD]] to %[[SCALAR_ALLOCA]] : !fir.ref<i32>
+! FIR: omp.terminator
+! FIR: }
+! FIR: %[[SCALAR_RELOAD:.*]] = fir.load %[[SCALAR_ALLOCA]] :
!fir.ref<i32>
+! FIR: %6:3 = fir.box_dims %3, %c0 : (!fir.box<!fir.array<?xi32>>,
index) -> (index, index, index)
+! FIR: omp.wsloop nowait {
+! FIR: omp.loop_nest (%arg2) : index = (%c1) to (%6#1) inclusive step
(%c1) {
+! FIR: fir.store %[[SCALAR_RELOAD]]
+! FIR: omp.yield
+! FIR: }
+! FIR: omp.terminator
+! FIR: }
+! FIR: omp.barrier
+! FIR: omp.terminator
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