Changes in code.

Author: sumesh13

IGC/Compiler/CustomSafeOptPass.cpp

@@ -4517,20 +4517,6 @@ bool IGCIndirectICBPropagaion::runOnFunction(Function &F) {
   bool enableCompression = false;
   CompressionResult compressionResult = {};
 
-  if (((int)IGC_GET_FLAG_VALUE(MinCompressionThreshold) > 0) && modMD->immConstant.sizes.size() == 1) {
-    std::optional<uint32_t> optionalCompressedSize =
-        getMaxStorageWhenStoringUniqueValues(modMD->immConstant.data, compressionResult);
-    if (optionalCompressedSize.has_value() && optionalCompressedSize.value() > 0 &&
-        static_cast<size_t>(optionalCompressedSize.value()) < storageNeeded) {
-      auto compressionEfficiency =
-          static_cast<double>(modMD->immConstant.data.size() - optionalCompressedSize.value()) * 100.0 /
-          modMD->immConstant.data.size();
-      if (compressionEfficiency > IGC_GET_FLAG_VALUE(MinCompressionThreshold)) {
-        storageNeeded = static_cast<size_t>(optionalCompressedSize.value());
-        enableCompression = true;
-      }
-    }
-  }
 
   if (modMD->immConstant.data.size() && storageNeeded <= maxImmConstantSizePushedLimit) {
     IRBuilder<> m_builder(F.getContext());

IGC/Compiler/tests/IGCIndirectICBPropagation/CompressedIndexTable.ll

@@ -565,8 +565,6 @@ DECLARE_IGC_REGKEY(DWORD, RovOpt, 3,
                    false)
 // DECLARE_IGC_REGKEY(bool, EnablePlatformFenceOpt,        true,  "Force fence optimization", false)
 DECLARE_IGC_REGKEY(bool, EnableLSCFence, true, "Enable LSC Fence in ConvertDXIL for the device has LSC", false)
-DECLARE_IGC_REGKEY(DWORD, MinCompressionThreshold, 50,
-                   "Set the minimum compression threshold that is desired (0 is disabling it)", true)
 DECLARE_IGC_REGKEY(bool, EnableSLMConstProp, true, "Enable SLM constant propagation (compute shader only).", false)
 DECLARE_IGC_REGKEY(
     bool, EnableStatelessToStateful, true,