Changes in code.

Author: sys-igc

IGC/Compiler/CISACodeGen/CISABuilder.cpp

@@ -4330,11 +4330,6 @@ namespace IGC
             SaveOption(vISA_SWSBTokenNum, IGC_GET_FLAG_VALUE(SWSBTokenNum));
         }
 
-        if (IGC_IS_FLAG_ENABLED(EnableAccSubBeforeRA))
-        {
-            SaveOption(vISA_accSubBeforeRA, true);
-        }
-
         if (IGC_IS_FLAG_ENABLED(EnableAccSub))
         {
             SaveOption(vISA_accSubstitution, true);

IGC/common/igc_flags.h

@@ -443,7 +443,6 @@ DECLARE_IGC_REGKEY(bool, SkipTREarlyExitCheck, false, "Skip SIMD16 early exit ch
 DECLARE_IGC_REGKEY(bool, EnableTCSHWBarriers, false,  "Enable TCS pass with HW barriers support. Default TCS pass is TCS pass with multiple continuation functions.", false)
 DECLARE_IGC_REGKEY(bool, ForceMCFBarriers, false,  "Force TCS pass with MCF (SW) barriers support. Default TCS pass is TCS pass with multiple continuation functions.", false)
 DECLARE_IGC_REGKEY(bool, EnableAccSub, true, "Enable accumulator substitution", false)
-DECLARE_IGC_REGKEY(bool, EnableAccSubBeforeRA, true, "Enable accumulator substitution", false)
 DECLARE_IGC_REGKEY(DWORD, NumGeneralAcc, 0, "set the number [1-8] of general acc for accumulator substitution. 0 means using the platform-default value", false)
 DECLARE_IGC_REGKEY(bool, ForceSWCoalescingOfAtomicCounter, false, "Force software coalescing of atomic counter", false)
 DECLARE_IGC_REGKEY(bool, ForceMixMode, false, "force enable mix mode even on platforms that do not support it", false)

visa/Optimizer.cpp

@@ -1587,7 +1587,7 @@ int Optimizer::optimization()
     // HW workaround before RA (assume no pseudo inst)
     runPass(PI_preRA_HWWorkaround);
 
-    if (builder.getOption(vISA_accSubBeforeRA) && (kernel.getNumAcc() > 2))
+    if (builder.getOption(vISA_accSubBeforeRA))
     {
         runPass(PI_expandMulPostSchedule);
 
@@ -1631,7 +1631,7 @@ int Optimizer::optimization()
         runPass(PI_localSchedule);
     }
 
-    if (!(builder.getOption(vISA_accSubBeforeRA) && (kernel.getNumAcc() > 2)))
+    if (!builder.getOption(vISA_accSubBeforeRA))
     {
         runPass(PI_expandMulPostSchedule);