diff --git a/llvm/lib/Transforms/IPO/OpenMPOpt.cpp b/llvm/lib/Transforms/IPO/OpenMPOpt.cpp
--- a/llvm/lib/Transforms/IPO/OpenMPOpt.cpp
+++ b/llvm/lib/Transforms/IPO/OpenMPOpt.cpp
@@ -102,6 +102,11 @@
     cl::desc("Inline all applicible functions on the device."), cl::Hidden,
     cl::init(false));
 
+static cl::opt<bool>
+    EnableVerboseRemarks("openmp-opt-verbose-remarks", cl::ZeroOrMore,
+                         cl::desc("Enables more verbose remarks."), cl::Hidden,
+                         cl::init(false));
+
 STATISTIC(NumOpenMPRuntimeCallsDeduplicated,
           "Number of OpenMP runtime calls deduplicated");
 STATISTIC(NumOpenMPParallelRegionsDeleted,
@@ -4034,11 +4039,25 @@
     ChangeStatus Changed = ChangeStatus::UNCHANGED;
 
     if (SimplifiedValue.hasValue() && SimplifiedValue.getValue()) {
-      Instruction &CB = *getCtxI();
-      A.changeValueAfterManifest(CB, **SimplifiedValue);
-      A.deleteAfterManifest(CB);
+      Instruction &I = *getCtxI();
+      A.changeValueAfterManifest(I, **SimplifiedValue);
+      A.deleteAfterManifest(I);
+
+      CallBase *CB = dyn_cast<CallBase>(&I);
+      auto Remark = [&](OptimizationRemark OR) {
+        if (auto *C = dyn_cast<ConstantInt>(*SimplifiedValue))
+          return OR << "Replacing OpenMP runtime call "
+                    << CB->getCalledFunction()->getName() << " with "
+                    << ore::NV("FoldedValue", C->getZExtValue()) << ".";
+        else
+          return OR << "Replacing OpenMP runtime call "
+                    << CB->getCalledFunction()->getName() << ".";
+      };
+
+      if (CB && EnableVerboseRemarks)
+        A.emitRemark<OptimizationRemark>(CB, "OMP180", Remark);
 
-      LLVM_DEBUG(dbgs() << TAG << "Folding runtime call: " << CB << " with "
+      LLVM_DEBUG(dbgs() << TAG << "Replacing runtime call: " << I << " with "
                         << **SimplifiedValue << "\n");
 
       Changed = ChangeStatus::CHANGED;
diff --git a/openmp/docs/remarks/OMP180.rst b/openmp/docs/remarks/OMP180.rst
new file mode 100644
--- /dev/null
+++ b/openmp/docs/remarks/OMP180.rst
@@ -0,0 +1,38 @@
+.. _omp180:
+
+Replacing OpenMP runtime call <call> with <value>.
+====================================================================
+
+This optimization remark indicates that analysis determined an OpenMP runtime 
+calls can be replaced with a constant value. This can occur when an OpenMP 
+runtime call that queried some internal state was found to always return a 
+single value after analysis.
+
+Example
+-------
+
+This optimization will trigger for most target regions to simplify the runtime 
+once certain constants are known. This will trigger for internal runtime 
+functions so it requires enabling verbose remarks with 
+`-openmp-opt-verbose-remarks`.
+
+.. code-block:: c++
+
+  void foo() {
+  #pragma omp target parallel
+    { }
+  }
+
+.. code-block:: console
+
+  $ clang test.c -fopenmp -fopenmp-targets=nvptx64 -O1 -Rpass=openmp-opt \
+    -mllvm -openmp-opt-verbose-remarks
+  remark: Replacing runtime call __kmpc_is_spmd_exec_mode with 1. [OMP180] [-Rpass=openmp-opt]
+  remark: Replacing runtime call __kmpc_is_spmd_exec_mode with 1. [OMP180] [-Rpass=openmp-opt]
+  remark: Replacing runtime call __kmpc_parallel_level with 1. [OMP180] [-Rpass=openmp-opt]
+  remark: Replacing runtime call __kmpc_parallel_level with 1. [OMP180] [-Rpass=openmp-opt]
+
+Diagnostic Scope
+----------------
+
+OpenMP optimization remark.
diff --git a/openmp/docs/remarks/OptimizationRemarks.rst b/openmp/docs/remarks/OptimizationRemarks.rst
--- a/openmp/docs/remarks/OptimizationRemarks.rst
+++ b/openmp/docs/remarks/OptimizationRemarks.rst
@@ -39,6 +39,7 @@
    OMP150
    OMP160
    OMP170
+   OMP180
 
 .. list-table::
    :widths: 15 15 70
@@ -107,3 +108,6 @@
    * - :ref:`OMP170 <omp170>`
      - Optimization
      - OpenMP runtime call <call> deduplicated.
+   * - :ref:`OMP180 <omp180>`
+     - Optimization
+     - Replacing OpenMP runtime call <call> with <value>.