[OpenMPOpt][Fix] Only initialize ICV initial values once.

[sstefan1]

Summary

This is mostly taken from D85703 and should go in separately.

[jdoerfert]

LGTM

llvm/include/llvm/Frontend/OpenMP/OMPConstants.h

 #include "llvm/Frontend/OpenMP/OMPKinds.def"
 };
 
 #define ICV_DATA_ENV(Enum, ...)                                                \
   constexpr auto Enum = omp::InternalControlVar::Enum;
 #include "llvm/Frontend/OpenMP/OMPKinds.def"
 
 enum class ICVInitValue {
-#define ICV_DATA_ENV(Enum, Name, EnvVar, Init) Init,
+#define ICV_INIT_VALUE(Enum, Name) Enum,
 #include "llvm/Frontend/OpenMP/OMPKinds.def"
 };
 
-#define ICV_DATA_ENV(Enum, Name, EnvVar, Init)                                 \
-  constexpr auto Init = omp::ICVInitValue::Init;
+#define ICV_INIT_VALUE(Enum, Name)                                             \
+  constexpr auto Enum = omp::ICVInitValue::Enum;
 #include "llvm/Frontend/OpenMP/OMPKinds.def"
 
 /// IDs for all omp runtime library (RTL) functions.
 enum class RuntimeFunction {
 #define OMP_RTL(Enum, ...) Enum,
 #include "llvm/Frontend/OpenMP/OMPKinds.def"
 };
 

llvm/include/llvm/Frontend/OpenMP/OMPKinds.def

 #undef OMP_FUNCTION_TYPE
 
 ///}
 
 /// Internal Control Variables information
 ///
 ///{
 
+#ifndef ICV_INIT_VALUE
+#define ICV_INIT_VALUE(Enum, Name)
+#endif
+
+#define __ICV_INIT_VALUE(Name) ICV_INIT_VALUE(ICV_##Name, #Name)
+
+__ICV_INIT_VALUE(ZERO)
+__ICV_INIT_VALUE(FALSE)
+__ICV_INIT_VALUE(IMPLEMENTATION_DEFINED)
+__ICV_INIT_VALUE(LAST)
+
+#undef __ICV_INIT_VALUE
+#undef ICV_INIT_VALUE
+
 #ifndef ICV_DATA_ENV
 #define ICV_DATA_ENV(Enum, Name, EnvVarName, Init)
 #endif
 
 #define __ICV_DATA_ENV(Name, EnvVarName, Init)                                 \
   ICV_DATA_ENV(ICV_##Name, #Name, #EnvVarName, Init)
 
 __ICV_DATA_ENV(nthreads, OMP_NUM_THREADS, ICV_IMPLEMENTATION_DEFINED)
 __ICV_DATA_ENV(active_levels, NONE, ICV_ZERO)
 __ICV_DATA_ENV(cancel, OMP_CANCELLATION, ICV_FALSE)
+__ICV_DATA_ENV(proc_bind, OMP_PROC_BIND, ICV_IMPLEMENTATION_DEFINED)
 __ICV_DATA_ENV(__last, last, ICV_LAST)
 
 #undef __ICV_DATA_ENV
 #undef ICV_DATA_ENV
 
 #ifndef ICV_RT_SET
 #define ICV_RT_SET(Name, RTL)
 #endif

 #define ICV_RT_GET(Name, RTL)
 #endif
 
 #define __ICV_RT_GET(Name, RTL) ICV_RT_GET(ICV_##Name, OMPRTL_##RTL)
 
 __ICV_RT_GET(nthreads, omp_get_max_threads)
 __ICV_RT_GET(active_levels, omp_get_active_level)
 __ICV_RT_GET(cancel, omp_get_cancellation)
+__ICV_RT_GET(proc_bind, omp_get_proc_bind)
 
 #undef __ICV_RT_GET
 #undef ICV_RT_GET
 
 ///}
 
 /// Runtime library function (and their attributes)
 ///

llvm/lib/Transforms/IPO/OpenMPOpt.cpp

if (remarksEnabled())
       analysisGlobalization();
 
     return Changed;
   }
 
   /// Print initial ICV values for testing.
   /// FIXME: This should be done from the Attributor once it is added.
   void printICVs() const {
-    InternalControlVar ICVs[] = {ICV_nthreads, ICV_active_levels, ICV_cancel};
+    InternalControlVar ICVs[] = {ICV_nthreads, ICV_active_levels, ICV_cancel,
+                                 ICV_proc_bind};
 
     for (Function *F : OMPInfoCache.ModuleSlice) {
       for (auto ICV : ICVs) {
         auto ICVInfo = OMPInfoCache.ICVs[ICV];
         auto Remark = [&](OptimizationRemark OR) {
           return OR << "OpenMP ICV " << ore::NV("OpenMPICV", ICVInfo.Name)
                     << " Value: "
                     << (ICVInfo.InitValue