Reduced skslc memory consumption

The big change here is smarter generic type handling which allows us to
keep far fewer entries in the core symboltable. This also comments out
a number of OpenGL builtin functions which Skia does not use and is
unlikely to in the future.
BUG=655673
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2442063002

Review-Url: https://codereview.chromium.org/2442063002

8 files changed, 174 insertions, 115 deletions

diff --git a/src/sksl/SkSLContext.h b/src/sksl/SkSLContext.h
index e652948499..dc41c6d7fc 100644
--- a/src/sksl/SkSLContext.h
+++ b/src/sksl/SkSLContext.h
@@ -19,7 +19,8 @@ namespace SkSL {
 class Context {
 public:
     Context()
-    : fVoid_Type(new Type("void"))
+    : fInvalid_Type(new Type("<INVALID>"))
+    , fVoid_Type(new Type("void"))
     , fDouble_Type(new Type("double", true))
     , fDVec2_Type(new Type("dvec2", *fDouble_Type, 2))
     , fDVec3_Type(new Type("dvec3", *fDouble_Type, 3))
@@ -104,24 +105,27 @@ public:
     , fGenBType_Type(new Type("$genBType", { fBool_Type.get(), fBVec2_Type.get(), fBVec3_Type.get(), 
                                              fBVec4_Type.get() }))
     , fMat_Type(new Type("$mat"))
-    , fVec_Type(new Type("$vec", { fVec2_Type.get(), fVec2_Type.get(), fVec3_Type.get(),
+    , fVec_Type(new Type("$vec", { fInvalid_Type.get(), fVec2_Type.get(), fVec3_Type.get(),
                                    fVec4_Type.get() }))
     , fGVec_Type(new Type("$gvec"))
     , fGVec2_Type(new Type("$gvec2"))
     , fGVec3_Type(new Type("$gvec3"))
     , fGVec4_Type(new Type("$gvec4", static_type(*fVec4_Type)))
-    , fDVec_Type(new Type("$dvec"))
-    , fIVec_Type(new Type("$ivec"))
-    , fUVec_Type(new Type("$uvec"))
-    , fBVec_Type(new Type("$bvec", { fBVec2_Type.get(), fBVec2_Type.get(), fBVec3_Type.get(), 
+    , fDVec_Type(new Type("$dvec", { fInvalid_Type.get(), fDVec2_Type.get(), fDVec3_Type.get(),
+                                     fDVec4_Type.get() }))
+    , fIVec_Type(new Type("$ivec", { fInvalid_Type.get(), fIVec2_Type.get(), fIVec3_Type.get(),
+                                     fIVec4_Type.get() }))
+    , fUVec_Type(new Type("$uvec", { fInvalid_Type.get(), fUVec2_Type.get(), fUVec3_Type.get(),
+                                     fUVec4_Type.get() }))
+    , fBVec_Type(new Type("$bvec", { fInvalid_Type.get(), fBVec2_Type.get(), fBVec3_Type.get(), 
                                      fBVec4_Type.get() }))
-    , fInvalid_Type(new Type("<INVALID>"))
     , fDefined_Expression(new Defined(*fInvalid_Type)) {}
 
     static std::vector<const Type*> static_type(const Type& t) {
         return { &t, &t, &t, &t };   
     }
 
+    const std::unique_ptr<Type> fInvalid_Type;
     const std::unique_ptr<Type> fVoid_Type;
 
     const std::unique_ptr<Type> fDouble_Type;
@@ -223,8 +227,6 @@ public:
 
     const std::unique_ptr<Type> fBVec_Type;
 
-    const std::unique_ptr<Type> fInvalid_Type;
-
     // dummy expression used to mark that a variable has a value during dataflow analysis (when it 
     // could have several different values, or the analyzer is otherwise unable to assign it a
     // specific expression)
diff --git a/src/sksl/SkSLIRGenerator.cpp b/src/sksl/SkSLIRGenerator.cpp
index 07fd9e27b0..0c9ee20328 100644
--- a/src/sksl/SkSLIRGenerator.cpp
+++ b/src/sksl/SkSLIRGenerator.cpp
@@ -371,40 +371,11 @@ std::unique_ptr<Statement> IRGenerator::convertDiscard(const ASTDiscardStatement
     return std::unique_ptr<Statement>(new DiscardStatement(d.fPosition));
 }
 
-static const Type& expand_generics(const Type& type, int i) {
-    if (type.kind() == Type::kGeneric_Kind) {
-        return *type.coercibleTypes()[i];
-    }
-    return type;
-}
-
-static void expand_generics(const FunctionDeclaration& decl, 
-                            std::shared_ptr<SymbolTable> symbolTable) {
-    for (int i = 0; i < 4; i++) {
-        const Type& returnType = expand_generics(decl.fReturnType, i);
-        std::vector<const Variable*> parameters;
-        for (const auto& p : decl.fParameters) {
-            Variable* var = new Variable(p->fPosition, Modifiers(p->fModifiers), p->fName,
-                                         expand_generics(p->fType, i),
-                                         Variable::kParameter_Storage);
-            symbolTable->takeOwnership(var);
-            parameters.push_back(var);
-        }
-        symbolTable->add(decl.fName, std::unique_ptr<FunctionDeclaration>(new FunctionDeclaration(
-                                                                           decl.fPosition,
-                                                                           decl.fName,
-                                                                           std::move(parameters),
-                                                                           std::move(returnType))));
-    }
-}
-
 std::unique_ptr<FunctionDefinition> IRGenerator::convertFunction(const ASTFunction& f) {
-    bool isGeneric;
     const Type* returnType = this->convertType(*f.fReturnType);
     if (!returnType) {
         return nullptr;
     }
-    isGeneric = returnType->kind() == Type::kGeneric_Kind;
     std::vector<const Variable*> parameters;
     for (const auto& param : f.fParameters) {
         const Type* type = this->convertType(*param->fType);
@@ -425,7 +396,6 @@ std::unique_ptr<FunctionDefinition> IRGenerator::convertFunction(const ASTFuncti
                                      Variable::kParameter_Storage);
         fSymbolTable->takeOwnership(var);
         parameters.push_back(var);
-        isGeneric |= type->kind() == Type::kGeneric_Kind;
     }
 
     // find existing declaration
@@ -483,19 +453,12 @@ std::unique_ptr<FunctionDefinition> IRGenerator::convertFunction(const ASTFuncti
     }
     if (!decl) {
         // couldn't find an existing declaration
-        if (isGeneric) {
-            ASSERT(!f.fBody);
-            expand_generics(FunctionDeclaration(f.fPosition, f.fName, parameters, *returnType), 
-                            fSymbolTable);
-        } else {
-            auto newDecl = std::unique_ptr<FunctionDeclaration>(new FunctionDeclaration(
-                                                                                     f.fPosition, 
-                                                                                     f.fName, 
-                                                                                     parameters, 
-                                                                                     *returnType));
-            decl = newDecl.get();
-            fSymbolTable->add(decl->fName, std::move(newDecl));
-        }
+        auto newDecl = std::unique_ptr<FunctionDeclaration>(new FunctionDeclaration(f.fPosition,
+                                                                                    f.fName,
+                                                                                    parameters,
+                                                                                    *returnType));
+        decl = newDecl.get();
+        fSymbolTable->add(decl->fName, std::move(newDecl));
     }
     if (f.fBody) {
         ASSERT(!fCurrentFunction);
@@ -915,8 +878,22 @@ std::unique_ptr<Expression> IRGenerator::call(Position position,
         fErrors.error(position, msg);
         return nullptr;
     }
+    std::vector<const Type*> types;
+    const Type* returnType;
+    if (!function.determineFinalTypes(arguments, &types, &returnType)) {
+        std::string msg = "no match for " + function.fName + "(";
+        std::string separator = "";
+        for (size_t i = 0; i < arguments.size(); i++) {
+            msg += separator;
+            separator = ", ";
+            msg += arguments[i]->fType.description();
+        }
+        msg += ")";
+        fErrors.error(position, msg);
+        return nullptr;
+    }
     for (size_t i = 0; i < arguments.size(); i++) {
-        arguments[i] = this->coerce(std::move(arguments[i]), function.fParameters[i]->fType);
+        arguments[i] = this->coerce(std::move(arguments[i]), *types[i]);
         if (!arguments[i]) {
             return nullptr;
         }
@@ -924,7 +901,7 @@ std::unique_ptr<Expression> IRGenerator::call(Position position,
             this->markWrittenTo(*arguments[i]);
         }
     }
-    return std::unique_ptr<FunctionCall>(new FunctionCall(position, function,
+    return std::unique_ptr<FunctionCall>(new FunctionCall(position, *returnType, function,
                                                           std::move(arguments)));
 }
 
@@ -940,9 +917,14 @@ bool IRGenerator::determineCallCost(const FunctionDeclaration& function,
         return false;
     }
     int total = 0;
+    std::vector<const Type*> types;
+    const Type* ignored;
+    if (!function.determineFinalTypes(arguments, &types, &ignored)) {
+        return false;
+    }
     for (size_t i = 0; i < arguments.size(); i++) {
         int cost;
-        if (arguments[i]->fType.determineCoercionCost(function.fParameters[i]->fType, &cost)) {
+        if (arguments[i]->fType.determineCoercionCost(*types[i], &cost)) {
             total += cost;
         } else {
             return false;
diff --git a/src/sksl/SkSLParser.cpp b/src/sksl/SkSLParser.cpp
index 2699d9c113..19e60999e9 100644
--- a/src/sksl/SkSLParser.cpp
+++ b/src/sksl/SkSLParser.cpp
@@ -132,9 +132,18 @@ Token Parser::nextToken() {
         return result;
     }
     int token = sksllex(fScanner);
-    return Token(Position(skslget_lineno(fScanner), -1), (Token::Kind) token, 
-                 token == Token::END_OF_FILE ? "<end of file>" : 
-                                               std::string(skslget_text(fScanner)));
+    std::string text;
+    switch ((Token::Kind) token) {
+        case Token::IDENTIFIER:    // fall through
+        case Token::INT_LITERAL:   // fall through
+        case Token::FLOAT_LITERAL: // fall through
+        case Token::DIRECTIVE:
+            text = std::string(skslget_text(fScanner));
+            break;
+        default:
+            break;
+    }
+    return Token(Position(skslget_lineno(fScanner), -1), (Token::Kind) token, text);
 }
 
 void Parser::pushback(Token t) {
diff --git a/src/sksl/SkSLToken.h b/src/sksl/SkSLToken.h
index b8a364c269..76a1df7f66 100644
--- a/src/sksl/SkSLToken.h
+++ b/src/sksl/SkSLToken.h
@@ -157,6 +157,8 @@ struct Token {
 
     Position fPosition;
     Kind fKind;
+    // will be the empty string unless the token has variable text content (identifiers, numeric
+    // literals, and directives)
     std::string fText;
 };
 
diff --git a/src/sksl/ir/SkSLFunctionCall.h b/src/sksl/ir/SkSLFunctionCall.h
index 85dba40f2a..5c67a2873c 100644
--- a/src/sksl/ir/SkSLFunctionCall.h
+++ b/src/sksl/ir/SkSLFunctionCall.h
@@ -17,9 +17,9 @@ namespace SkSL {
  * A function invocation.
  */
 struct FunctionCall : public Expression {
-    FunctionCall(Position position, const FunctionDeclaration& function,
+    FunctionCall(Position position, const Type& type, const FunctionDeclaration& function,
                  std::vector<std::unique_ptr<Expression>> arguments)
-    : INHERITED(position, kFunctionCall_Kind, function.fReturnType)
+    : INHERITED(position, kFunctionCall_Kind, type)
     , fFunction(std::move(function))
     , fArguments(std::move(arguments)) {}
 
diff --git a/src/sksl/ir/SkSLFunctionDeclaration.h b/src/sksl/ir/SkSLFunctionDeclaration.h
index ffde0c66c1..52a579a89b 100644
--- a/src/sksl/ir/SkSLFunctionDeclaration.h
+++ b/src/sksl/ir/SkSLFunctionDeclaration.h
@@ -8,6 +8,7 @@
 #ifndef SKSL_FUNCTIONDECLARATION
 #define SKSL_FUNCTIONDECLARATION
 
+#include "SkSLExpression.h"
 #include "SkSLModifiers.h"
 #include "SkSLSymbol.h"
 #include "SkSLSymbolTable.h"
@@ -55,6 +56,50 @@ struct FunctionDeclaration : public Symbol {
         return true;
     }
 
+    /**
+     * Determine the effective types of this function's parameters and return value when called with
+     * the given arguments. This is relevant for functions with generic parameter types, where this 
+     * will collapse the generic types down into specific concrete types.
+     *
+     * Returns true if it was able to select a concrete set of types for the generic function, false
+     * if there is no possible way this can match the argument types. Note that even a true return
+     * does not guarantee that the function can be successfully called with those arguments, merely
+     * indicates that an attempt should be made. If false is returned, the state of
+     * outParameterTypes and outReturnType are undefined.
+     */
+    bool determineFinalTypes(const std::vector<std::unique_ptr<Expression>>& arguments,
+                             std::vector<const Type*>* outParameterTypes,
+                             const Type** outReturnType) const {
+        assert(arguments.size() == fParameters.size());
+        int genericIndex = -1;
+        for (size_t i = 0; i < arguments.size(); i++) {
+            if (fParameters[i]->fType.kind() == Type::kGeneric_Kind) {
+                std::vector<const Type*> types = fParameters[i]->fType.coercibleTypes();
+                if (genericIndex == -1) {
+                    for (size_t j = 0; j < types.size(); j++) {
+                        if (arguments[i]->fType.canCoerceTo(*types[j])) {
+                            genericIndex = j;
+                            break;
+                        }
+                    }
+                    if (genericIndex == -1) {
+                        return false;
+                    }
+                }
+                outParameterTypes->push_back(types[genericIndex]);
+            } else {
+                outParameterTypes->push_back(&fParameters[i]->fType);
+            }
+        }
+        if (fReturnType.kind() == Type::kGeneric_Kind) {
+            assert(genericIndex != -1);
+            *outReturnType = fReturnType.coercibleTypes()[genericIndex];
+        } else {
+            *outReturnType = &fReturnType;
+        }
+        return true;
+    }
+
     mutable bool fDefined;
     bool fBuiltin;
     const std::vector<const Variable*> fParameters;
diff --git a/src/sksl/ir/SkSLType.h b/src/sksl/ir/SkSLType.h
index ad2185b4ee..afd00d8b2a 100644
--- a/src/sksl/ir/SkSLType.h
+++ b/src/sksl/ir/SkSLType.h
@@ -57,7 +57,9 @@ public:
     : INHERITED(Position(), kType_Kind, std::move(name))
     , fTypeKind(kOther_Kind) {}
 
-    // Create a generic type which maps to the listed types.
+    // Create a generic type which maps to the listed types. As currently implemented, there are 
+    // always exactly four coercion targets, mapping to the scalar, vec2, vec3, and vec4 versions of 
+    // a type.
     Type(std::string name, std::vector<const Type*> types)
     : INHERITED(Position(), kType_Kind, std::move(name))
     , fTypeKind(kGeneric_Kind)
diff --git a/src/sksl/sksl.include b/src/sksl/sksl.include
index 6dc1ff8cf2..ab8ad92fe5 100644
--- a/src/sksl/sksl.include
+++ b/src/sksl/sksl.include
@@ -22,88 +22,88 @@ $genType log($genType x);
 $genType exp2($genType x);
 $genType log2($genType x);
 $genType sqrt($genType x);
-$genDType sqrt($genDType x);
+//$genDType sqrt($genDType x);
 $genType inversesqrt($genType x);
-$genDType inversesqrt($genDType x);
+//$genDType inversesqrt($genDType x);
 $genType abs($genType x);
 $genIType abs($genIType x);
-$genDType abs($genDType x);
+//$genDType abs($genDType x);
 $genType sign($genType x);
 $genIType sign($genIType x);
-$genDType sign($genDType x);
+//$genDType sign($genDType x);
 $genType floor($genType x);
-$genDType floor($genDType x);
+//$genDType floor($genDType x);
 $genType trunc($genType x);
-$genDType trunc($genDType x);
+//$genDType trunc($genDType x);
 $genType round($genType x);
-$genDType round($genDType x);
+//$genDType round($genDType x);
 $genType roundEven($genType x);
-$genDType roundEven($genDType x);
+//$genDType roundEven($genDType x);
 $genType ceil($genType x);
-$genDType ceil($genDType x);
+//$genDType ceil($genDType x);
 $genType fract($genType x);
-$genDType fract($genDType x);
+//$genDType fract($genDType x);
 $genType mod($genType x, float y);
 $genType mod($genType x, $genType y);
-$genDType mod($genDType x, double y);
-$genDType mod($genDType x, $genDType y);
+//$genDType mod($genDType x, double y);
+//$genDType mod($genDType x, $genDType y);
 $genType modf($genType x, out $genType i);
-$genDType modf($genDType x, out $genDType i);
+//$genDType modf($genDType x, out $genDType i);
 $genType min($genType x, $genType y);
 $genType min($genType x, float y);
-$genDType min($genDType x, $genDType y);
-$genDType min($genDType x, double y);
+//$genDType min($genDType x, $genDType y);
+//$genDType min($genDType x, double y);
 $genIType min($genIType x, $genIType y);
 $genIType min($genIType x, int y);
-$genUType min($genUType x, $genUType y);
-$genUType min($genUType x, uint y);
+//$genUType min($genUType x, $genUType y);
+//$genUType min($genUType x, uint y);
 $genType max($genType x, $genType y);
 $genType max($genType x, float y);
-$genDType max($genDType x, $genDType y);
-$genDType max($genDType x, double y);
+//$genDType max($genDType x, $genDType y);
+//$genDType max($genDType x, double y);
 $genIType max($genIType x, $genIType y);
 $genIType max($genIType x, int y);
-$genUType max($genUType x, $genUType y);
-$genUType max($genUType x, uint y);
+//$genUType max($genUType x, $genUType y);
+//$genUType max($genUType x, uint y);
 $genType clamp($genType x, $genType minVal, $genType maxVal);
 $genType clamp($genType x, float minVal, float maxVal);
-$genDType clamp($genDType x, $genDType minVal, $genDType maxVal);
-$genDType clamp($genDType x, double minVal, double maxVal);
+//$genDType clamp($genDType x, $genDType minVal, $genDType maxVal);
+//$genDType clamp($genDType x, double minVal, double maxVal);
 $genIType clamp($genIType x, $genIType minVal, $genIType maxVal);
 $genIType clamp($genIType x, int minVal, int maxVal);
-$genUType clamp($genUType x, $genUType minVal, $genUType maxVal);
-$genUType clamp($genUType x, uint minVal, uint maxVal);
+//$genUType clamp($genUType x, $genUType minVal, $genUType maxVal);
+//$genUType clamp($genUType x, uint minVal, uint maxVal);
 $genType mix($genType x, $genType y, $genType a);
 $genType mix($genType x, $genType y, float a);
-$genDType mix($genDType x, $genDType y, $genDType a);
-$genDType mix($genDType x, $genDType y, double a);
+//$genDType mix($genDType x, $genDType y, $genDType a);
+//$genDType mix($genDType x, $genDType y, double a);
 $genType mix($genType x, $genType y, $genBType a);
-$genDType mix($genDType x, $genDType y, $genBType a);
+//$genDType mix($genDType x, $genDType y, $genBType a);
 $genIType mix($genIType x, $genIType y, $genBType a);
-$genUType mix($genUType x, $genUType y, $genBType a);
+//$genUType mix($genUType x, $genUType y, $genBType a);
 $genBType mix($genBType x, $genBType y, $genBType a);
 $genType step($genType edge, $genType x);
 $genType step(float edge, $genType x);
-$genDType step($genDType edge, $genDType x);
-$genDType step(double edge, $genDType x);
+//$genDType step($genDType edge, $genDType x);
+//$genDType step(double edge, $genDType x);
 $genType smoothstep($genType edge0, $genType edge1, $genType x);
 $genType smoothstep(float edge0, float edge1, $genType x);
-$genDType smoothstep($genDType edge0, $genDType edge1, $genDType x);
-$genDType smoothstep(double edge0, double edge1, $genDType x);
+//$genDType smoothstep($genDType edge0, $genDType edge1, $genDType x);
+//$genDType smoothstep(double edge0, double edge1, $genDType x);
 $genBType isnan($genType x);
 $genBType isnan($genDType x);
 $genBType isinf($genType x);
 $genBType isinf($genDType x);
 $genIType floatBitsToInt($genType value);
-$genUType floatBitsToUint($genType value);
+//$genUType floatBitsToUint($genType value);
 $genType intBitsToFloat($genIType value);
 $genType uintBitsToFloat($genUType value);
 $genType fma($genType a, $genType b, $genType c);
-$genDType fma($genDType a, $genDType b, $genDType c);
+//$genDType fma($genDType a, $genDType b, $genDType c);
 $genType frexp($genType x, out $genIType exp);
-$genDType frexp($genDType x, out $genIType exp);
+//$genDType frexp($genDType x, out $genIType exp);
 $genType ldexp($genType x, in $genIType exp);
-$genDType ldexp($genDType x, in $genIType exp);
+//$genDType ldexp($genDType x, in $genIType exp);
 uint packUnorm2x16(vec2 v);
 uint packSnorm2x16(vec2 v);
 uint packUnorm4x8(vec4 v);
@@ -112,27 +112,27 @@ vec2 unpackUnorm2x16(uint p);
 vec2 unpackSnorm2x16(uint p);
 vec4 unpackUnorm4x8(uint p);
 vec4 unpackSnorm4x8(uint p);
-double packDouble2x32(uvec2 v);
+//double packDouble2x32(uvec2 v);
 uvec2 unpackDouble2x32(double v);
 uint packHalf2x16(vec2 v);
 vec2 unpackHalf2x16(uint v);
 float length($genType x);
-double length($genDType x);
+//double length($genDType x);
 float distance($genType p0, $genType p1);
-double distance($genDType p0, $genDType p1);
+//double distance($genDType p0, $genDType p1);
 float dot($genType x, $genType y);
-double dot($genDType x, $genDType y);
+//double dot($genDType x, $genDType y);
 vec3 cross(vec3 x, vec3 y);
-dvec3 cross(dvec3 x, dvec3 y);
+//dvec3 cross(dvec3 x, dvec3 y);
 $genType normalize($genType x);
-$genDType normalize($genDType x);
+//$genDType normalize($genDType x);
 vec4 ftransform();
 $genType faceforward($genType N, $genType I, $genType Nref);
-$genDType faceforward($genDType N, $genDType I, $genDType Nref);
+//$genDType faceforward($genDType N, $genDType I, $genDType Nref);
 $genType reflect($genType I, $genType N);
-$genDType reflect($genDType I, $genDType N);
+//$genDType reflect($genDType I, $genDType N);
 $genType refract($genType I, $genType N, float eta);
-$genDType refract($genDType I, $genDType N, float eta);
+//$genDType refract($genDType I, $genDType N, float eta);
 $mat matrixCompMult($mat x, $mat y);
 mat2 outerProduct(vec2 c, vec2 r);
 mat3 outerProduct(vec3 c, vec3 r);
@@ -181,16 +181,18 @@ $bvec notEqual($bvec x, $bvec y);
 bool any($bvec x);
 bool all($bvec x);
 $bvec not($bvec x);
-$genUType uaddCarry($genUType x, $genUType y, out $genUType carry);
-$genUType usubBorrow($genUType x, $genUType y, out $genUType borrow);
+
+/*
+//$genUType uaddCarry($genUType x, $genUType y, out $genUType carry);
+//$genUType usubBorrow($genUType x, $genUType y, out $genUType borrow);
 void umulExtended($genUType x, $genUType y, out $genUType msb, out $genUType lsb);
 void imulExtended($genIType x, $genIType y, out $genIType msb, out $genIType lsb);
 $genIType bitfieldExtract($genIType value, int offset, int bits);
-$genUType bitfieldExtract($genUType value, int offset, int bits);
+//$genUType bitfieldExtract($genUType value, int offset, int bits);
 $genIType bitfieldInsert($genIType base, $genIType insert, int offset, int bits);
-$genUType bitfieldInsert($genUType base, $genUType insert, int offset, int bits);
+//$genUType bitfieldInsert($genUType base, $genUType insert, int offset, int bits);
 $genIType bitfieldReverse($genIType value);
-$genUType bitfieldReverse($genUType value);
+//$genUType bitfieldReverse($genUType value);
 $genIType bitCount($genIType value);
 $genIType bitCount($genUType value);
 $genIType findLSB($genIType value);
@@ -206,7 +208,9 @@ ivec2 textureSize(sampler2DShadow sampler, int lod);
 ivec2 textureSize(samplerCubeShadow sampler, int lod);
 ivec3 textureSize($gsamplerCubeArray sampler, int lod);
 ivec3 textureSize(samplerCubeArrayShadow sampler, int lod);
+*/
 ivec2 textureSize($gsampler2DRect sampler);
+/*
 ivec2 textureSize(sampler2DRectShadow sampler);
 ivec2 textureSize($gsampler1DArray sampler, int lod);
 ivec3 textureSize($gsampler2DArray sampler, int lod);
@@ -241,11 +245,15 @@ int textureQueryLevels(samplerCubeShadow sampler);
 int textureQueryLevels(sampler1DArrayShadow sampler);
 int textureQueryLevels(sampler2DArrayShadow sampler);
 int textureQueryLevels(samplerCubeArrayShadow sampler);
+*/
+
 $gvec4 texture($gsampler1D sampler, float P);
 $gvec4 texture($gsampler1D sampler, float P, float bias);
 $gvec4 texture($gsampler2D sampler, vec2 P);
 vec4 texture(samplerExternalOES sampler, vec2 P, float bias);
 vec4 texture(samplerExternalOES sampler, vec2 P);
+
+/*
 $gvec4 texture($gsampler2D sampler, vec2 P, float bias);
 $gvec4 texture($gsampler3D sampler, vec3 P);
 $gvec4 texture($gsampler3D sampler, vec3 P, float bias);
@@ -266,10 +274,14 @@ $gvec4 texture($gsamplerCubeArray sampler, vec4 P, float bias);
 float texture(sampler1DArrayShadow sampler, vec3 P);
 float texture(sampler1DArrayShadow sampler, vec3 P, float bias);
 float texture(sampler2DArrayShadow sampler, vec4 P);
+*/
+
 $gvec4 texture($gsampler2DRect sampler, vec2 P);
+
+/*
 float texture(sampler2DRectShadow sampler, vec3 P);
 float texture($gsamplerCubeArrayShadow sampler, vec4 P, float compare);
-
+*/
 )
 
 // split into multiple chunks, as MSVC++ complains if a single string is too long
@@ -284,6 +296,7 @@ $gvec4 textureProj($gsampler2D sampler, vec3 P);
 $gvec4 textureProj($gsampler2D sampler, vec3 P, float bias);
 $gvec4 textureProj($gsampler2D sampler, vec4 P);
 $gvec4 textureProj($gsampler2D sampler, vec4 P, float bias);
+/*
 $gvec4 textureProj($gsampler3D sampler, vec4 P);
 $gvec4 textureProj($gsampler3D sampler, vec4 P, float bias);
 float textureProj(sampler1DShadow sampler, vec4 P);
@@ -445,7 +458,6 @@ $gvec4 textureGatherOffset($gsampler2DRect sampler, vec2 P, ivec2 offset, int co
 vec4 textureGatherOffset(sampler2DShadow sampler, vec2 P, float refZ, ivec2 offset);
 vec4 textureGatherOffset(sampler2DArrayShadow sampler, vec3 P, float refZ, ivec2 offset);
 vec4 textureGatherOffset(sampler2DRectShadow sampler, vec2 P, float refZ, ivec2 offset);
-/*
 $gvec4 textureGatherOffsets($gsampler2D sampler, vec2 P, ivec2 offsets[4]);
 $gvec4 textureGatherOffsets($gsampler2D sampler, vec2 P, ivec2 offsets[4], int comp);
 $gvec4 textureGatherOffsets($gsampler2DArray sampler, vec3 P, ivec2 offsets[4]);
@@ -458,6 +470,7 @@ vec4 textureGatherOffsets(sampler2DRectShadow sampler, vec2 P, float refZ, ivec2
 */
 vec4 texture1D(sampler1D sampler, float coord);
 vec4 texture1D(sampler1D sampler, float coord, float bias);
+/*
 vec4 texture1DProj(sampler1D sampler, vec2 coord);
 vec4 texture1DProj(sampler1D sampler, vec2 coord, float bias);
 vec4 texture1DProj(sampler1D sampler, vec4 coord);
@@ -465,9 +478,11 @@ vec4 texture1DProj(sampler1D sampler, vec4 coord, float bias);
 vec4 texture1DLod(sampler1D sampler, float coord, float lod);
 vec4 texture1DProjLod(sampler1D sampler, vec2 coord, float lod);
 vec4 texture1DProjLod(sampler1D sampler, vec4 coord, float lod);
+*/
 vec4 texture2D(sampler2D sampler, vec2 coord);
 vec4 texture2D(samplerExternalOES sampler, vec2 coord);
 vec4 texture2D(sampler2D sampler, vec2 coord, float bias);
+/*
 vec4 texture2DProj(sampler2D sampler, vec3 coord);
 vec4 texture2DProj(sampler2D sampler, vec3 coord, float bias);
 vec4 texture2DProj(sampler2D sampler, vec4 coord);
@@ -496,7 +511,6 @@ vec4 shadow1DLod(sampler1DShadow sampler, vec3 coord, float lod);
 vec4 shadow2DLod(sampler2DShadow sampler, vec3 coord, float lod);
 vec4 shadow1DProjLod(sampler1DShadow sampler, vec4 coord, float lod);
 vec4 shadow2DProjLod(sampler2DShadow sampler, vec4 coord, float lod);
-/*
 uint atomicCounterIncrement(atomic_uint c);
 uint atomicCounter(atomic_uint c);
 uint atomicAdd(inout uint mem, uint data);
@@ -520,6 +534,8 @@ int atomicCompSwap(inout int mem, int compare, int data);
 
 $genType dFdx($genType p);
 $genType dFdy($genType p);
+
+/*
 $genType fwidth($genType p);
 $genType fwidthCoarse($genType p);
 $genType fwidthFine($genType p);
@@ -542,6 +558,7 @@ void memoryBarrierBuffer();
 void memoryBarrierShared();
 void memoryBarrierImage();
 void groupMemoryBarrier();
+*/
 
 )