Revert "[Flang OpenMP] Add LLVM translation support for UNTIED in Task (llvm#115283)"

This reverts commit 919aead.
It breaks following LLVM bots:
https://lab.llvm.org/buildbot/#/builders/199
https://lab.llvm.org/buildbot/#/builders/143
https://lab.llvm.org/buildbot/#/builders/17

Author: omjavaid

flang/lib/Lower/OpenMP/OpenMP.cpp

@@ -2867,7 +2867,6 @@ 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::holds_alternative<clause::Detach>(clause.u)) {
       std::string name =

flang/test/Lower/OpenMP/Todo/task_untied.f90

@@ -0,0 +1,13 @@
+! 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

flang/test/Lower/OpenMP/task.f90

@@ -235,27 +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
 !CHECK: }
  !$omp task mergeable
  !$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

mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp

@@ -258,6 +258,7 @@ static LogicalResult checkImplementationStatus(Operation &op) {
         checkAllocate(op, result);
         checkInReduction(op, result);
         checkPriority(op, result);
+        checkUntied(op, result);
       })
       .Case([&](omp::TaskgroupOp op) {
         checkAllocate(op, result);
@@ -267,10 +268,6 @@ 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);

mlir/test/Target/LLVMIR/openmp-llvm.mlir

@@ -3020,18 +3020,6 @@ 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
 

mlir/test/Target/LLVMIR/openmp-todo.mlir

@@ -440,6 +440,17 @@ llvm.func @task_priority(%x : i32) {
 
 // -----
 
+llvm.func @task_untied() {
+  // expected-error@below {{not yet implemented: Unhandled clause untied in omp.task operation}}
+  // expected-error@below {{LLVM Translation failed for operation: omp.task}}
+  omp.task untied {
+    omp.terminator
+  }
+  llvm.return
+}
+
+// -----
+
 llvm.func @taskgroup_allocate(%x : !llvm.ptr) {
   // expected-error@below {{not yet implemented: Unhandled clause allocate in omp.taskgroup operation}}
   // expected-error@below {{LLVM Translation failed for operation: omp.taskgroup}}
@@ -492,19 +503,6 @@ llvm.func @taskloop(%lb : i32, %ub : i32, %step : i32) {
 
 // -----
 
-llvm.func @taskloop_untied(%lb : i32, %ub : i32, %step : i32) {
-  // expected-error@below {{not yet implemented: omp.taskloop}}
-  // expected-error@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@below {{not yet implemented: Unhandled clause depend in omp.taskwait operation}}
   // expected-error@below {{LLVM Translation failed for operation: omp.taskwait}}