[Autobackout][FunctionalRegression]Revert of change: 6ca4e41: cleanup unneeded fields

cleanup unneeded fields

Author: sys-igc

IGC/Compiler/CISACodeGen/CISABuilder.cpp

@@ -4427,15 +4427,15 @@ namespace IGC
                 return true;
 
             // API check.
-            bool enableForRetry = m_program->m_DriverInfo->enableVISAPreRASchedulerForRetry() ||
+            bool enableForRetey = m_program->m_DriverInfo->enableVISAPreRASchedulerForRetry() ||
                 context->m_retryManager.AllowVISAPreRAScheduler();
             // PreRA scheduler runs always when VRT is enabled
-            enableForRetry |= m_program->m_Platform->supportsVRT() && m_program->m_DriverInfo->supportsVRT() &&
+            enableForRetey |= m_program->m_Platform->supportsVRT() && m_program->m_DriverInfo->supportsVRT() &&
                 (context->getModuleMetaData()->compOpt.EnableVRT || IGC_IS_FLAG_ENABLED(EnableVRT));
 
             if (IGC_IS_FLAG_ENABLED(EnableVISAPreSched) &&
                 m_program->m_DriverInfo->enableVISAPreRAScheduler() &&
-                enableForRetry)
+                enableForRetey)
                 return true;
 
             return false;
@@ -4817,6 +4817,10 @@ namespace IGC
         {
             SaveOption(vISA_TotalGRFNum, NumGRFSetting);
         }
+        else if (m_program->getNumGRFPerThread() > 0)
+        {
+            SaveOption(vISA_TotalGRFNum, m_program->getNumGRFPerThread());
+        }
 
         if (context->getModuleMetaData()->compOpt.WaEnableALTModeVisaWA)
         {
@@ -4894,18 +4898,14 @@ namespace IGC
                 }
             }
         } else { // Other shader types
-            if (IGC_GET_FLAG_VALUE(ForceHWThreadNumberPerEU) != 0)
-            {
+            if (IGC_GET_FLAG_VALUE(ForceHWThreadNumberPerEU) != 0) {
                 SaveOption(vISA_HWThreadNumberPerEU,
                            IGC_GET_FLAG_VALUE(ForceHWThreadNumberPerEU));
-            }
-            else if ((m_program->m_Platform->supportsAutoGRFSelection() &&
-                      context->m_DriverInfo.supportsAutoGRFSelection() &&
-                      IGC_IS_FLAG_ENABLED(ForceSupportsAutoGRFSelection)) ||
-                     (m_program->m_Platform->supportsVRT() &&
-                      m_program->m_DriverInfo->supportsVRT() &&
-                      IGC_IS_FLAG_ENABLED(EnableVRT)))
-            {
+            } else if (m_program->m_Platform->supportsAutoGRFSelection() &&
+                       context->m_DriverInfo.supportsAutoGRFSelection() &&
+                       IGC_IS_FLAG_ENABLED(ForceSupportsAutoGRFSelection)
+                || m_program->m_Platform->supportsVRT() && m_program->m_DriverInfo->supportsVRT() && IGC_IS_FLAG_ENABLED(EnableVRT)
+                ) {
                 // When user hasn't specified number of threads, we can rely on
                 // compiler heuristics
                 SaveOption(vISA_AutoGRFSelection, true);

IGC/Compiler/CISACodeGen/ShaderCodeGen.hpp

@@ -145,6 +145,8 @@ class CShader
     virtual int getAnnotatedNumThreads() { return -1; }
     virtual bool IsRegularGRFRequested() { return false; }
     virtual bool IsLargeGRFRequested() { return false; }
+    virtual unsigned getNumGRFPerThread() { return 0; }
+    virtual bool getEnableVRT() { return false; }
     virtual bool hasReadWriteImage(llvm::Function& F)
     {
         IGC_UNUSED(F);

IGC/common/MDFrameWork.h

@@ -300,6 +300,15 @@ enum class ShaderTypeMD
         // Shaders that satisfy `isPrimaryShaderIdentifier()` can also have
         // a collection of other names that they go by.
         std::vector<std::string> Aliases;
+        // Number of GRF registers available for this RT entry function.
+        // On platforms with VRT support it is possible to configure 32, 64, 96,
+        // 128, 160, 192, 224 and 256 registers per thread
+        // If this setting is greater than 0 than EnableVRT must be false.
+        uint32_t NumGRF = 0;
+        // Enables compiler heuristics to optimize GRF usage for this
+        // RT entry function.
+        // If this setting is "true", NumGRF must be set to 0.
+        bool EnableVRT = false;
     };
 
     struct ConstantAddress