Skip higher SIMD for high pressure dx9 shaders

Skip higher SIMD for high pressure dx9 shaders

Author: fftzeng

IGC/Compiler/CISACodeGen/ShaderCodeGen.cpp

@@ -1239,6 +1239,12 @@ 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)
+    {
+        return false;
+    }
+
     if (ctx->m_sampler < 11 || ctx->m_inputCount < 16 || ctx->m_tempCount < 40 || ctx->m_dxbcCount < 280 || ctx->m_ConstantBufferCount < 500)
     {
         if (ctx->m_tempCount < 90 && ctx->m_ConstantBufferCount < 210)

IGC/common/igc_flags.h

@@ -350,6 +350,7 @@ 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(bool, InitializeUndefValueEnable,    false, "Setting this to 1/true initializes all undefs in URB payload to 0", false)