Refactor CollectVariables

src/compiler/translator/Compiler.cpp

@@ -433,14 +433,24 @@ TIntermBlock *TCompiler::compileTreeImpl(const char *const shaderStrings[],
 
         if (success && shouldCollectVariables(compileOptions))
         {
-            collectVariables(root);
+            ASSERT(!variablesCollected);
+            CollectVariables(root, &attributes, &outputVariables, &uniforms, &varyings,
+                             &interfaceBlocks, hashFunction, symbolTable, shaderVersion,
+                             extensionBehavior);
+            variablesCollected = true;
             if (compileOptions & SH_USE_UNUSED_STANDARD_SHARED_BLOCKS)
             {
                 useAllMembersInUnusedStandardAndSharedBlocks(root);
             }
             if (compileOptions & SH_ENFORCE_PACKING_RESTRICTIONS)
             {
-                success = enforcePackingRestrictions();
+                std::vector<sh::ShaderVariable> expandedUniforms;
+                sh::ExpandUniforms(uniforms, &expandedUniforms);
+                VariablePacker packer;
+                // Returns true if, after applying the packing rules in the GLSL ES 1.00.17 spec
+                // Appendix A, section 7, the shader does not use too many uniforms.
+                success =
+                    packer.CheckVariablesWithinPackingLimits(maxUniformVectors, expandedUniforms);
                 if (!success)
                 {
                     mDiagnostics.globalError("too many uniforms");
@@ -689,7 +699,6 @@ void TCompiler::clearResults()
     attributes.clear();
     outputVariables.clear();
     uniforms.clear();
-    expandedUniforms.clear();
     varyings.clear();
     interfaceBlocks.clear();
     variablesCollected = false;
@@ -887,21 +896,6 @@ bool TCompiler::limitExpressionComplexity(TIntermBlock *root)
     return true;
 }
 
-void TCompiler::collectVariables(TIntermNode *root)
-{
-    if (!variablesCollected)
-    {
-        sh::CollectVariables collect(&attributes, &outputVariables, &uniforms, &varyings,
-                                     &interfaceBlocks, hashFunction, symbolTable,
-                                     extensionBehavior);
-        root->traverse(&collect);
-
-        // This is for enforcePackingRestriction().
-        sh::ExpandUniforms(uniforms, &expandedUniforms);
-        variablesCollected = true;
-    }
-}
-
 bool TCompiler::shouldCollectVariables(ShCompileOptions compileOptions)
 {
     return (compileOptions & SH_VARIABLES) != 0;
@@ -912,12 +906,6 @@ bool TCompiler::wereVariablesCollected() const
     return variablesCollected;
 }
 
-bool TCompiler::enforcePackingRestrictions()
-{
-    VariablePacker packer;
-    return packer.CheckVariablesWithinPackingLimits(maxUniformVectors, expandedUniforms);
-}
-
 void TCompiler::initializeGLPosition(TIntermBlock *root)
 {
     InitVariableList list;

src/compiler/translator/Compiler.h

@@ -138,9 +138,6 @@ class TCompiler : public TShHandleBase
                                              ShCompileOptions compileOptions){};
     // Translate to object code.
     virtual void translate(TIntermBlock *root, ShCompileOptions compileOptions) = 0;
-    // Returns true if, after applying the packing rules in the GLSL 1.017 spec
-    // Appendix A, section 7, the shader does not use too many uniforms.
-    bool enforcePackingRestrictions();
     // Insert statements to reference all members in unused uniform blocks with standard and shared
     // layout. This is to work around a Mac driver that treats unused standard/shared
     // uniform blocks as inactive.
@@ -176,7 +173,6 @@ class TCompiler : public TShHandleBase
     std::vector<sh::Attribute> attributes;
     std::vector<sh::OutputVariable> outputVariables;
     std::vector<sh::Uniform> uniforms;
-    std::vector<sh::ShaderVariable> expandedUniforms;
     std::vector<sh::Varying> varyings;
     std::vector<sh::InterfaceBlock> interfaceBlocks;
 
@@ -189,9 +185,6 @@ class TCompiler : public TShHandleBase
 
     void initSamplerDefaultPrecision(TBasicType samplerType);
 
-    // Collect info for all attribs, uniforms, varyings.
-    void collectVariables(TIntermNode *root);
-
     bool variablesCollected;
 
     // Removes unused function declarations and prototypes from the AST

src/compiler/translator/VariableInfo.h

@@ -10,72 +10,24 @@
 #include <GLSLANG/ShaderLang.h>
 
 #include "compiler/translator/ExtensionBehavior.h"
-#include "compiler/translator/IntermNode.h"
-
-class TSymbolTable;
 
 namespace sh
 {
 
-// Traverses intermediate tree to collect all attributes, uniforms, varyings.
-class CollectVariables : public TIntermTraverser
-{
-  public:
-    CollectVariables(std::vector<Attribute> *attribs,
+class TIntermBlock;
+class TSymbolTable;
+
+void CollectVariables(TIntermBlock *root,
+                      std::vector<Attribute> *attributes,
                       std::vector<OutputVariable> *outputVariables,
                       std::vector<Uniform> *uniforms,
                       std::vector<Varying> *varyings,
                       std::vector<InterfaceBlock> *interfaceBlocks,
                       ShHashFunction64 hashFunction,
                       const TSymbolTable &symbolTable,
+                      int shaderVersion,
                       const TExtensionBehavior &extensionBehavior);
 
-    void visitSymbol(TIntermSymbol *symbol) override;
-    bool visitDeclaration(Visit, TIntermDeclaration *node) override;
-    bool visitBinary(Visit visit, TIntermBinary *binaryNode) override;
-
-  private:
-    void setCommonVariableProperties(const TType &type,
-                                     const TString &name,
-                                     ShaderVariable *variableOut) const;
-
-    Attribute recordAttribute(const TIntermSymbol &variable) const;
-    OutputVariable recordOutputVariable(const TIntermSymbol &variable) const;
-    Varying recordVarying(const TIntermSymbol &variable) const;
-    InterfaceBlock recordInterfaceBlock(const TIntermSymbol &variable) const;
-    Uniform recordUniform(const TIntermSymbol &variable) const;
-
-    std::vector<Attribute> *mAttribs;
-    std::vector<OutputVariable> *mOutputVariables;
-    std::vector<Uniform> *mUniforms;
-    std::vector<Varying> *mVaryings;
-    std::vector<InterfaceBlock> *mInterfaceBlocks;
-
-    std::map<std::string, InterfaceBlockField *> mInterfaceBlockFields;
-
-    bool mDepthRangeAdded;
-    bool mPointCoordAdded;
-    bool mFrontFacingAdded;
-    bool mFragCoordAdded;
-
-    bool mInstanceIDAdded;
-    bool mVertexIDAdded;
-    bool mPositionAdded;
-    bool mPointSizeAdded;
-    bool mLastFragDataAdded;
-    bool mFragColorAdded;
-    bool mFragDataAdded;
-    bool mFragDepthEXTAdded;
-    bool mFragDepthAdded;
-    bool mSecondaryFragColorEXTAdded;
-    bool mSecondaryFragDataEXTAdded;
-
-    ShHashFunction64 mHashFunction;
-
-    const TSymbolTable &mSymbolTable;
-    const TExtensionBehavior &mExtensionBehavior;
-};
-
 void ExpandVariable(const ShaderVariable &variable,
                     const std::string &name,
                     const std::string &mappedName,