Enable dx9 simd early exit and remove registry key

Enable dx9 simd early exit and remove registry key

Author: fftzeng

IGC/Compiler/CISACodeGen/ShaderCodeGen.cpp

@@ -1246,8 +1246,7 @@ void CodeGen(DomainShaderContext* ctx, CShaderProgram::KernelShaderMap& shaders)
 // check based on performance measures.
 static bool SimdEarlyCheck(CodeGenContext* ctx)
 {
-    if (IGC_IS_FLAG_ENABLED(SimdEarlyOut_9) &&
-        ctx->m_instrTypes.numPsInputs > 22 && ctx->m_instrTypes.numInsts > 1000)
+    if (ctx->m_instrTypes.numPsInputs > 22 && ctx->m_instrTypes.numInsts > 1000)
     {
         return false;
     }

IGC/common/igc_flags.h

@@ -350,7 +350,6 @@ DECLARE_IGC_REGKEY(bool, DumpTimeStatsPerPass,          false, "Collect Timing o
 DECLARE_IGC_REGKEY(bool, DumpHasNonKernelArgLdSt,       false, "Print if hasNonKernelArg load/store to stderr", true)
 DECLARE_IGC_REGKEY(bool, PrintPsoDdiHash,               true,  "Print psoDDIHash in TimeStats_Shaders.csv file", true)
 DECLARE_IGC_REGKEY(bool, AddExtraIntfInfo,                false, "Will add extra inteference info from .extraintf files from c:\\Intel\\IGC\\ShaderOverride", false)
-DECLARE_IGC_REGKEY(bool, SimdEarlyOut_9,                false, "Force compiler simd early out for dx9", true)
 
 DECLARE_IGC_GROUP("Debugging features")
 DECLARE_IGC_REGKEY(debugString, ForceAssignRhysicalReg,     0, "Force assigning dclId to phyiscal reg.", true)