[llvm] [OpenMPIRBuilder] Add ThreadLimit and NumTeamsUpper clauses to teams clause (PR #68364)

[Kiran Chandramohan via llvm-commits]

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@@ -4082,6 +4082,163 @@ TEST_F(OpenMPIRBuilderTest, CreateTeams) {
                      [](Instruction &inst) { return isa<ICmpInst>(&inst); }));
 }
 
+TEST_F(OpenMPIRBuilderTest, CreateTeamsWithThreadLimit) {
+  using InsertPointTy = OpenMPIRBuilder::InsertPointTy;
+  OpenMPIRBuilder OMPBuilder(*M);
+  OMPBuilder.initialize();
+  F->setName("func");
+  IRBuilder<> &Builder = OMPBuilder.Builder;
+  Builder.SetInsertPoint(BB);
+
+  Function *FakeFunction =
+      Function::Create(FunctionType::get(Builder.getVoidTy(), false),
+                       GlobalValue::ExternalLinkage, "fakeFunction", M.get());
+
+  auto BodyGenCB = [&](InsertPointTy AllocaIP, InsertPointTy CodeGenIP) {
+    Builder.restoreIP(CodeGenIP);
+    Builder.CreateCall(FakeFunction, {});
+  };
+
+  OpenMPIRBuilder::LocationDescription Loc({Builder.saveIP(), DL});
+  Builder.restoreIP(
+      OMPBuilder.createTeams(Builder, BodyGenCB, nullptr, F->arg_begin()));
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kiranchandramohan wrote:

Please add a comment for what is `nullptr` and why using `F->arg_begin()` is fine. Same for the `createTeams` invocation in the other tests.

https://github.com/llvm/llvm-project/pull/68364