Set EnableLscSamplerRouting as default true

Set EnableLscSamplerRouting as default true.

Author: ichenkai

IGC/Compiler/CISACodeGen/WIAnalysis.cpp

@@ -1546,6 +1546,7 @@ WIAnalysis::WIDependancy WIAnalysisRunner::calculate_dep(const CallInst* inst)
         intrinsic_name == llvm_waveAll ||
         intrinsic_name == llvm_waveClustered ||
         intrinsic_name == llvm_ld_ptr ||
+        intrinsic_name == llvm_ldlptr ||
         (IGC_IS_FLAG_DISABLED(DisableUniformTypedAccess) && intrinsic_name == llvm_typed_read) ||
         intrinsic_name == llvm_add_pair ||
         intrinsic_name == llvm_sub_pair ||

IGC/Compiler/SamplerPerfOptPass.cpp

@@ -400,8 +400,11 @@ bool SamplerPerfOptPass::runOnFunction(Function& F)
                 }
                 if (SamplerLoadIntrinsic* loadInst = dyn_cast<SamplerLoadIntrinsic>(II))
                 {
+                    // EnableLscSamplerRouting key is true (default)
+                    // DisableLscSamplerRouting is from UMD AIL to turn off per shader
                     if (ctx->platform.hasLSCSamplerRouting() &&
                         IGC_IS_FLAG_ENABLED(EnableLscSamplerRouting) &&
+                        !ctx->getModuleMetaData()->compOpt.DisableLscSamplerRouting &&
                         loadInst->getIntrinsicID() == GenISAIntrinsic::GenISA_ldptr)
                     {
                         changed = ConvertLdToLdl(loadInst);

IGC/Compiler/TranslateToProgrammableOffsetsPass.cpp

@@ -1028,6 +1028,7 @@ bool TranslateToProgrammableOffsetsPass::runOnFunction(Function& F)
                 switch (loadInst->getIntrinsicID())
                 {
                 case GenISAIntrinsic::GenISA_ldptr:
+                case GenISAIntrinsic::GenISA_ldlptr:
                     newInst = TranslateIntrinsic<GenISAIntrinsic::GenISA_ldptr>::Translate(loadInst);
                     break;
                 default:

IGC/common/MDFrameWork.h

@@ -453,6 +453,7 @@ namespace IGC
         unsigned FastestS1Options                       = 0;  // FCEXP_NO_EXPRIMENT. Can't access the enum here for some reason.
         bool DisableFastestForWaveIntrinsicsCS          = false;
         bool ForceLinearWalkOnLinearUAV                 = false;
+        bool DisableLscSamplerRouting                   = false;
     };
 
     enum class ThreadIDLayout

IGC/common/igc_flags.h

@@ -566,7 +566,7 @@ DECLARE_IGC_REGKEY(bool, EnableInsertingPairedResourcePointer, true, "Enable to
 DECLARE_IGC_REGKEY(bool, EnablePromotionToSampleMlod,          true,
     "Enables promotion of sample and sample_c to sample_mlod and sample_c_mlod instructions when min lod is present", false)
 DECLARE_IGC_REGKEY(bool, DisableCorrectlyRoundedMacros,     false, "Tmp flag to disable correcly rounded macros for BMG+. This flag will be removed in the future.", false)
-DECLARE_IGC_REGKEY(bool, EnableLscSamplerRouting, false, "Enables conversion of LD to LD_L instructions.", false)
+DECLARE_IGC_REGKEY(bool, EnableLscSamplerRouting, true, "Enables conversion of LD to LD_L instructions.", false)
 DECLARE_IGC_REGKEY(bool, EnableSIMD16ForXe2, false, "Enable SIMD16 for Xe2", false)
 DECLARE_IGC_REGKEY(bool, EnableSIMD16ForNonWaveXe2, true, "Enable SIMD16 for Xe2 if the shader doesn't have wave", false)
 DECLARE_IGC_REGKEY(DWORD, CheckCSSLMLimit, 2, "Check SLM or threads limit on compute shader to turn on Enable2xGRF on DG2+"\