Add Post Initialization for class Z::CPU

After the construction of the CPU class, the processor type and
processor features are "true values" from the port library. Post
initialization will change some of the values there needed for
the compiler.

Issue: #4339

Signed-off-by: Harry Yu <harryyu1994@gmail.com>

compiler/z/env/OMRCPU.cpp

@@ -112,7 +112,60 @@ OMR::Z::CPU::CPU()
    :
    OMR::CPU(),
    _supportedArch(z9)
-   {}
+   {
+   }
+
+OMR::Z::CPU::postInitialization()
+   {
+   if (self()->isAtLeast(OMR_PROCESSOR_S390_Z10) && TR::Options::getCmdLineOptions()->getOption(TR_DisableZ10))
+      self()->setProcessorType(OMR_PROCESSOR_S390_FIRST);
+   else if (self()->isAtLeast(OMR_PROCESSOR_S390_Z196) && TR::Options::getCmdLineOptions()->getOption(TR_DisableZ196))
+      self()->setProcessorType(OMR_PROCESSOR_S390_Z10);
+   else if (self()->isAtLeast(OMR_PROCESSOR_S390_ZEC12) && TR::Options::getCmdLineOptions()->getOption(TR_DisableZEC12))
+      self()->setProcessorType(OMR_PROCESSOR_S390_Z196);
+   else if (self()->isAtLeast(OMR_PROCESSOR_S390_Z13) && TR::Options::getCmdLineOptions()->getOption(TR_DisableZ13))
+      self()->setProcessorType(OMR_PROCESSOR_S390_ZEC12);
+   else if (self()->isAtLeast(OMR_PROCESSOR_S390_Z14) && TR::Options::getCmdLineOptions()->getOption(TR_DisableZ14))
+      self()->setProcessorType(OMR_PROCESSOR_S390_Z13);
+   else if (self()->isAtLeast(OMR_PROCESSOR_S390_Z15) && TR::Options::getCmdLineOptions()->getOption(TR_DisableZ15))
+      self()->setProcessorType(OMR_PROCESSOR_S390_Z14);
+   else if (self()->isAtLeast(OMR_PROCESSOR_S390_ZNEXT) && TR::Options::getCmdLineOptions()->getOption(TR_DisableZNext))
+      self()->setProcessorType(OMR_PROCESSOR_S390_Z15);
+
+   if (!self()->isAtLeast(OMR_PROCESSOR_S390_Z10))
+      {
+      self()->disableFeature(OMR_FEATURE_S390_DFP);
+      }
+
+   if (!self()->isAtLeast(OMR_PROCESSOR_S390_Z196))
+      {
+      self()->disableFeature(OMR_FEATURE_S390_HIGH_WORD);
+      }
+
+   if (!self()->isAtLeast(OMR_PROCESSOR_S390_ZEC12))
+      {
+      self()->disableFeature(OMR_FEATURE_S390_TE);
+      self()->disableFeature(OMR_FEATURE_S390_RI);
+      }
+
+   if (!self()->isAtLeast(OMR_PROCESSOR_S390_Z13))
+      {
+      self()->disableFeature(OMR_FEATURE_S390_VECTOR_FACILITY);
+      }
+
+   if (!self()->isAtLeast(OMR_PROCESSOR_S390_Z14))
+      {
+      self()->disableFeature(OMR_FEATURE_S390_VECTOR_PACKED_DECIMAL);
+      self()->disableFeature(OMR_FEATURE_S390_GUARDED_STORAGE);
+      }
+
+   if (!self()->isAtLeast(OMR_PROCESSOR_S390_Z15))
+      {
+      self()->disableFeature(OMR_FEATURE_S390_MISCELLANEOUS_INSTRUCTION_EXTENSION_3);
+      self()->disableFeature(OMR_FEATURE_S390_VECTOR_FACILITY_ENHANCEMENT_2);
+      self()->disableFeature(OMR_FEATURE_S390_VECTOR_PACKED_DECIMAL_ENHANCEMENT_FACILITY);
+      }
+   }
 
 bool
 OMR::Z::CPU::getSupportsArch(Architecture arch)
@@ -403,3 +456,4 @@ OMR::Z::CPU::isTargetWithinBranchRelativeRILRange(intptrj_t targetAddress, intpt
    return (targetAddress == sourceAddress + ((intptrj_t)((int32_t)((targetAddress - sourceAddress) / 2))) * 2) &&
             (targetAddress % 2 == 0);
    }
+

compiler/z/env/OMRCPU.hpp

@@ -262,8 +262,6 @@ class CPU : public OMR::CPU
 
    CPU();
 
-   protected:
-
    enum
       {
       // Available                             = 0x00000001,