Add vISA_maxRAIterations

Add vISA_maxRAIterations for offline compilation experiment.
_OS_DESCRIPTION

Author: youfengwu

visa/GraphColor.cpp

@@ -9856,7 +9856,7 @@ void VarSplit::localSplit(IR_Builder &builder, G4_BB *bb) {
 
 void GlobalRA::addrRegAlloc() {
   uint32_t addrSpillId = 0;
-  unsigned maxRAIterations = 10;
+  unsigned maxRAIterations = builder.getuint32Option(vISA_MaxRAIterations);
   unsigned iterationNo = 0;
 
   while (iterationNo < maxRAIterations) {
@@ -9919,7 +9919,7 @@ void GlobalRA::addrRegAlloc() {
 
 void GlobalRA::flagRegAlloc() {
   uint32_t flagSpillId = 0;
-  unsigned maxRAIterations = 10;
+  unsigned maxRAIterations = builder.getuint32Option(vISA_MaxRAIterations);
   uint32_t iterationNo = 0;
   bool spillingFlag = false;
 
@@ -10877,7 +10877,7 @@ int GlobalRA::coloringRegAlloc() {
   }
 
   startTimer(TimerID::GRF_GLOBAL_RA);
-  unsigned maxRAIterations = 10;
+  unsigned maxRAIterations = builder.getuint32Option(vISA_MaxRAIterations);
   unsigned iterationNo = 0;
 
   int globalScratchOffset =

visa/RegAlloc.cpp

@@ -26,7 +26,7 @@ using namespace vISA;
 
 #define GRAPH_COLOR
 
-#if defined (_DEBUG) || !defined(DLL_MODE)
+#if defined (_DEBUG) || defined(_INTERNAL)
 bool vISA::RATraceFlag = false;
 #endif
 
@@ -2925,7 +2925,7 @@ int regAlloc(IR_Builder &builder, PhyRegPool &regPool, G4_Kernel &kernel) {
   kernel.fg.callerSaveAreaOffset = kernel.fg.calleeSaveAreaOffset =
       kernel.fg.frameSizeInOWord = 0;
 
-#if defined(_DEBUG) || !defined(DLL_MODE)
+#if defined(_DEBUG) || defined(_INTERNAL)
   vISA::RATraceFlag = builder.getOption(vISA_RATrace);
 #endif
 

visa/RegAlloc.h

@@ -23,7 +23,7 @@ SPDX-License-Identifier: MIT
 
 namespace vISA {
 
-#if defined(_DEBUG) || !defined(DLL_MODE)
+#if defined(_DEBUG) || defined(_INTERNAL)
 // Flag to control whether RA trace is on. This should be set to
 // builder.getOption(vISA_RATrace) at RA entry.
 extern bool RATraceFlag;

visa/include/VISAOptionsDefs.h

@@ -312,6 +312,8 @@ DEF_VISA_OPTION(vISA_ReservedGRFNum, ET_INT32, "-reservedGRFNum",
                 "USAGE: -reservedGRFNum <regNum>\n", 0)
 DEF_VISA_OPTION(vISA_TotalGRFNum, ET_INT32, "-TotalGRFNum",
                 "USAGE: -TotalGRFNum <regNum>\n", 0)
+DEF_VISA_OPTION(vISA_MaxRAIterations, ET_INT32, "-maxRAIterations",
+                "USAGE: -maxRAIterations <iterationNum>\n", 10)
 DEF_VISA_OPTION(vISA_MinGRFNum, ET_INT32, "-minGRFNum",
                 "Set the lower bound GRF for auto GRF selection."
                 "USAGE: -minGRFNum <regNum>. 0 means no minimum GRF number.\n",