Disable simple push restriction

Disable the payload size restrictions on simple push constants until
the regressions are fixed.

Change-Id: I48326e713ffd7bb9f38f1c2e28b00b0afecf93a2

Author: davidjwoo

IGC/Compiler/CISACodeGen/DriverInfo.hpp

@@ -282,6 +282,9 @@ namespace IGC
             return 4 * sizeof(MEGABYTE);
         }
 
+        // Limits simple push constants based on pushed inputs
+        virtual bool EnableSimplePushRestriction() const { return false; }
+
 
     };
 

IGC/Compiler/CISACodeGen/PushAnalysis.cpp

@@ -955,9 +955,13 @@ namespace IGC
     {
         auto& inputs = m_context->getModuleMetaData()->pushInfo.inputs;
         typedef const std::map<unsigned int, SInputDesc>::value_type& inputPairType;
-        auto largestPair = std::max_element(inputs.begin(), inputs.end(),
-            [](inputPairType a, inputPairType b) { return a.second.index < b.second.index; });
-        unsigned int largestIndex = largestPair != inputs.end() ? largestPair->second.index : 0;
+        unsigned int largestIndex = 0;
+        if (m_context->m_DriverInfo.EnableSimplePushRestriction())
+        {
+            auto largestPair = std::max_element(inputs.begin(), inputs.end(),
+                [](inputPairType a, inputPairType b) { return a.second.index < b.second.index; });
+            largestIndex = largestPair != inputs.end() ? largestPair->second.index : 0;
+        }
         const unsigned int maxPushedGRFs = 96;
         if (largestIndex >= maxPushedGRFs)
         {