[flang-commits] [flang] [mlir] [Flang][OpenMP] Add LLVM translation support for UNTIED clause in Task (PR #115283)
Thirumalai Shaktivel via flang-commits
flang-commits at lists.llvm.org
Sun Dec 8 21:47:17 PST 2024
https://github.com/Thirumalai-Shaktivel updated https://github.com/llvm/llvm-project/pull/115283
>From 68fa9ebe6d73f5632381fc20af000a3a3ae3ade6 Mon Sep 17 00:00:00 2001
From: Thirumalai-Shaktivel <thirumalaishaktivel at gmail.com>
Date: Thu, 7 Nov 2024 09:25:06 +0000
Subject: [PATCH 1/3] [Flang][OpenMP] Add LLVM translation support for UNTIED
clause in Task
Implementation details:
The UNTIED clause is recognized by setting the flag=0 for the default
case or performing logical OR to flag if other clauses are specified,
and this flag is passed as an argument to the `__kmpc_omp_task_alloc`
runtime call.
---
flang/lib/Lower/OpenMP/OpenMP.cpp | 1 +
flang/test/Lower/OpenMP/Todo/task_untied.f90 | 13 -------------
flang/test/Lower/OpenMP/task.f90 | 17 +++++++++++++++++
mlir/test/Target/LLVMIR/openmp-llvm.mlir | 12 ++++++++++++
4 files changed, 30 insertions(+), 13 deletions(-)
delete mode 100644 flang/test/Lower/OpenMP/Todo/task_untied.f90
diff --git a/flang/lib/Lower/OpenMP/OpenMP.cpp b/flang/lib/Lower/OpenMP/OpenMP.cpp
index cd30bbb89ce470..06447fb4c2299e 100644
--- a/flang/lib/Lower/OpenMP/OpenMP.cpp
+++ b/flang/lib/Lower/OpenMP/OpenMP.cpp
@@ -2869,6 +2869,7 @@ static void genOMP(lower::AbstractConverter &converter, lower::SymMap &symTable,
!std::holds_alternative<clause::UseDevicePtr>(clause.u) &&
!std::holds_alternative<clause::InReduction>(clause.u) &&
!std::holds_alternative<clause::Mergeable>(clause.u) &&
+ !std::holds_alternative<clause::Untied>(clause.u) &&
!std::holds_alternative<clause::TaskReduction>(clause.u)) {
std::string name =
parser::ToUpperCaseLetters(llvm::omp::getOpenMPClauseName(clause.id));
diff --git a/flang/test/Lower/OpenMP/Todo/task_untied.f90 b/flang/test/Lower/OpenMP/Todo/task_untied.f90
deleted file mode 100644
index 87d242ba3e9d21..00000000000000
--- a/flang/test/Lower/OpenMP/Todo/task_untied.f90
+++ /dev/null
@@ -1,13 +0,0 @@
-! RUN: %not_todo_cmd bbc -emit-fir -fopenmp -o - %s 2>&1 | FileCheck %s
-! RUN: %not_todo_cmd %flang_fc1 -emit-fir -fopenmp -o - %s 2>&1 | FileCheck %s
-
-!===============================================================================
-! `untied` clause
-!===============================================================================
-
-! CHECK: not yet implemented: UNTIED clause is not implemented yet
-subroutine omp_task_untied()
- !$omp task untied
- call foo()
- !$omp end task
-end subroutine omp_task_untied
diff --git a/flang/test/Lower/OpenMP/task.f90 b/flang/test/Lower/OpenMP/task.f90
index 6e525a044b011e..a8cc16c540c9c8 100644
--- a/flang/test/Lower/OpenMP/task.f90
+++ b/flang/test/Lower/OpenMP/task.f90
@@ -235,6 +235,10 @@ subroutine task_multiple_clauses()
!$omp end task
end subroutine task_multiple_clauses
+!===============================================================================
+! `mergeable` clause
+!===============================================================================
+
subroutine task_mergeable()
!CHECK: omp.task mergeable {
!CHECK: omp.terminator
@@ -242,3 +246,16 @@ subroutine task_mergeable()
!$omp task mergeable
!$omp end task
end subroutine
+
+!===============================================================================
+! `untied` clause
+!===============================================================================
+
+!CHECK-LABEL: func.func @_QPomp_task_untied() {
+subroutine omp_task_untied()
+ !CHECK: omp.task untied {
+ !$omp task untied
+ call foo()
+ !CHECK: omp.terminator
+ !$omp end task
+end subroutine omp_task_untied
diff --git a/mlir/test/Target/LLVMIR/openmp-llvm.mlir b/mlir/test/Target/LLVMIR/openmp-llvm.mlir
index 5f8bdf8afdf783..8903bf283b5c75 100644
--- a/mlir/test/Target/LLVMIR/openmp-llvm.mlir
+++ b/mlir/test/Target/LLVMIR/openmp-llvm.mlir
@@ -3020,6 +3020,18 @@ module attributes {omp.is_target_device = true} {
// -----
+llvm.func @omp_task_untied() {
+ // The third argument is 0: which signifies the united task
+ // CHECK: {{.*}} = call ptr @__kmpc_omp_task_alloc(ptr @1, i32 %{{.*}}, i32 0,
+ // CHECK-SAME: i64 40, i64 0, ptr @{{.*}})
+ omp.task untied {
+ omp.terminator
+ }
+ llvm.return
+}
+
+// -----
+
// Third argument is 5: essentially (4 || 1)
// signifying this task is TIED and MERGEABLE
>From 0a248e784eef8b3653f55b731792fdbd20c3ebc0 Mon Sep 17 00:00:00 2001
From: Thirumalai-Shaktivel <thirumalaishaktivel at gmail.com>
Date: Mon, 9 Dec 2024 05:29:52 +0000
Subject: [PATCH 2/3] test: Remove a todo for the task untied clause
---
.../Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp | 1 -
mlir/test/Target/LLVMIR/openmp-todo.mlir | 11 -----------
2 files changed, 12 deletions(-)
diff --git a/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp b/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
index 946c3c423267dd..1cd8d76c34a0cf 100644
--- a/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
+++ b/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
@@ -254,7 +254,6 @@ static LogicalResult checkImplementationStatus(Operation &op) {
checkAllocate(op, result);
checkInReduction(op, result);
checkPriority(op, result);
- checkUntied(op, result);
})
.Case([&](omp::TaskgroupOp op) {
checkAllocate(op, result);
diff --git a/mlir/test/Target/LLVMIR/openmp-todo.mlir b/mlir/test/Target/LLVMIR/openmp-todo.mlir
index de797ea2aa3649..65c846eccb26c2 100644
--- a/mlir/test/Target/LLVMIR/openmp-todo.mlir
+++ b/mlir/test/Target/LLVMIR/openmp-todo.mlir
@@ -458,17 +458,6 @@ llvm.func @task_priority(%x : i32) {
// -----
-llvm.func @task_untied() {
- // expected-error at below {{not yet implemented: Unhandled clause untied in omp.task operation}}
- // expected-error at below {{LLVM Translation failed for operation: omp.task}}
- omp.task untied {
- omp.terminator
- }
- llvm.return
-}
-
-// -----
-
llvm.func @taskgroup_allocate(%x : !llvm.ptr) {
// expected-error at below {{not yet implemented: Unhandled clause allocate in omp.taskgroup operation}}
// expected-error at below {{LLVM Translation failed for operation: omp.taskgroup}}
>From 3006a543c78d3dbaf47148f1d00b12b691d0b40f Mon Sep 17 00:00:00 2001
From: Thirumalai-Shaktivel <thirumalaishaktivel at gmail.com>
Date: Mon, 9 Dec 2024 05:32:57 +0000
Subject: [PATCH 3/3] Add a todo for taskloop untied clause
---
.../Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp | 4 ++++
mlir/test/Target/LLVMIR/openmp-todo.mlir | 13 +++++++++++++
2 files changed, 17 insertions(+)
diff --git a/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp b/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
index 1cd8d76c34a0cf..248248571a6f70 100644
--- a/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
+++ b/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
@@ -263,6 +263,10 @@ static LogicalResult checkImplementationStatus(Operation &op) {
checkDepend(op, result);
checkNowait(op, result);
})
+ .Case([&](omp::TaskloopOp op) {
+ // TODO: Add other clauses check
+ checkUntied(op, result);
+ })
.Case([&](omp::WsloopOp op) {
checkAllocate(op, result);
checkLinear(op, result);
diff --git a/mlir/test/Target/LLVMIR/openmp-todo.mlir b/mlir/test/Target/LLVMIR/openmp-todo.mlir
index 65c846eccb26c2..ab55a5dbd378bd 100644
--- a/mlir/test/Target/LLVMIR/openmp-todo.mlir
+++ b/mlir/test/Target/LLVMIR/openmp-todo.mlir
@@ -510,6 +510,19 @@ llvm.func @taskloop(%lb : i32, %ub : i32, %step : i32) {
// -----
+llvm.func @taskloop_untied(%lb : i32, %ub : i32, %step : i32) {
+ // expected-error at below {{not yet implemented: omp.taskloop}}
+ // expected-error at below {{LLVM Translation failed for operation: omp.taskloop}}
+ omp.taskloop untied {
+ omp.loop_nest (%iv) : i32 = (%lb) to (%ub) step (%step) {
+ omp.yield
+ }
+ }
+ llvm.return
+}
+
+// -----
+
llvm.func @taskwait_depend(%x: !llvm.ptr) {
// expected-error at below {{not yet implemented: Unhandled clause depend in omp.taskwait operation}}
// expected-error at below {{LLVM Translation failed for operation: omp.taskwait}}
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