The Tor Browser: gfx/angle/src/compiler/Intermediate.cpp@129ffea94266 (annotated)

gfx/angle/src/compiler/Intermediate.cpp@129ffea94266 (annotated)

gfx/angle/src/compiler/Intermediate.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 //
 // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 //
 // Build the intermediate representation.
 //
 #include <float.h>
 #include <limits.h>
 #include <algorithm>
 #include "compiler/HashNames.h"
 #include "compiler/localintermediate.h"
 #include "compiler/QualifierAlive.h"
 #include "compiler/RemoveTree.h"
 bool CompareStructure(const TType& leftNodeType, ConstantUnion* rightUnionArray, ConstantUnion* leftUnionArray);
 static TPrecision GetHigherPrecision( TPrecision left, TPrecision right ){
     return left > right ? left : right;
 }
 const char* getOperatorString(TOperator op) {
     switch (op) {
       case EOpInitialize: return "=";
       case EOpAssign: return "=";
       case EOpAddAssign: return "+=";
       case EOpSubAssign: return "-=";
       case EOpDivAssign: return "/=";
       // Fall-through.
       case EOpMulAssign:
       case EOpVectorTimesMatrixAssign:
       case EOpVectorTimesScalarAssign:
       case EOpMatrixTimesScalarAssign:
       case EOpMatrixTimesMatrixAssign: return "*=";
       // Fall-through.
       case EOpIndexDirect:
       case EOpIndexIndirect: return "[]";
       case EOpIndexDirectStruct: return ".";
       case EOpVectorSwizzle: return ".";
       case EOpAdd: return "+";
       case EOpSub: return "-";
       case EOpMul: return "*";
       case EOpDiv: return "/";
       case EOpMod: UNIMPLEMENTED(); break;
       case EOpEqual: return "==";
       case EOpNotEqual: return "!=";
       case EOpLessThan: return "<";
       case EOpGreaterThan: return ">";
       case EOpLessThanEqual: return "<=";
       case EOpGreaterThanEqual: return ">=";
       // Fall-through.
       case EOpVectorTimesScalar:
       case EOpVectorTimesMatrix:
       case EOpMatrixTimesVector:
       case EOpMatrixTimesScalar:
       case EOpMatrixTimesMatrix: return "*";
       case EOpLogicalOr: return "||";
       case EOpLogicalXor: return "^^";
       case EOpLogicalAnd: return "&&";
       case EOpNegative: return "-";
       case EOpVectorLogicalNot: return "not";
       case EOpLogicalNot: return "!";
       case EOpPostIncrement: return "++";
       case EOpPostDecrement: return "--";
       case EOpPreIncrement: return "++";
       case EOpPreDecrement: return "--";
       // Fall-through.
       case EOpConvIntToBool:
       case EOpConvFloatToBool: return "bool";
       // Fall-through.
       case EOpConvBoolToFloat:
       case EOpConvIntToFloat: return "float";
       // Fall-through.
       case EOpConvFloatToInt:
       case EOpConvBoolToInt: return "int";
       case EOpRadians: return "radians";
       case EOpDegrees: return "degrees";
       case EOpSin: return "sin";
       case EOpCos: return "cos";
       case EOpTan: return "tan";
       case EOpAsin: return "asin";
       case EOpAcos: return "acos";
       case EOpAtan: return "atan";
       case EOpExp: return "exp";
       case EOpLog: return "log";
       case EOpExp2: return "exp2";
       case EOpLog2: return "log2";
       case EOpSqrt: return "sqrt";
       case EOpInverseSqrt: return "inversesqrt";
       case EOpAbs: return "abs";
       case EOpSign: return "sign";
       case EOpFloor: return "floor";
       case EOpCeil: return "ceil";
       case EOpFract: return "fract";
       case EOpLength: return "length";
       case EOpNormalize: return "normalize";
       case EOpDFdx: return "dFdx";
       case EOpDFdy: return "dFdy";
       case EOpFwidth: return "fwidth";
       case EOpAny: return "any";
       case EOpAll: return "all";
       default: break;
     }
     return "";
 }
 ////////////////////////////////////////////////////////////////////////////
 //
 // First set of functions are to help build the intermediate representation.
 // These functions are not member functions of the nodes.
 // They are called from parser productions.
 //
 /////////////////////////////////////////////////////////////////////////////
 //
 // Add a terminal node for an identifier in an expression.
 //
 // Returns the added node.
 //
 TIntermSymbol* TIntermediate::addSymbol(int id, const TString& name, const TType& type, const TSourceLoc& line)
 {
     TIntermSymbol* node = new TIntermSymbol(id, name, type);
     node->setLine(line);
     return node;
 }
 //
 // Connect two nodes with a new parent that does a binary operation on the nodes.
 //
 // Returns the added node.
 //
 TIntermTyped* TIntermediate::addBinaryMath(TOperator op, TIntermTyped* left, TIntermTyped* right, const TSourceLoc& line, TSymbolTable& symbolTable)
 {
     switch (op) {
         case EOpEqual:
         case EOpNotEqual:
             if (left->isArray())
                 return 0;
             break;
         case EOpLessThan:
         case EOpGreaterThan:
         case EOpLessThanEqual:
         case EOpGreaterThanEqual:
             if (left->isMatrix() || left->isArray() || left->isVector() || left->getBasicType() == EbtStruct) {
                 return 0;
             }
             break;
         case EOpLogicalOr:
         case EOpLogicalXor:
         case EOpLogicalAnd:
             if (left->getBasicType() != EbtBool || left->isMatrix() || left->isArray() || left->isVector()) {
                 return 0;
             }
             break;
         case EOpAdd:
         case EOpSub:
         case EOpDiv:
         case EOpMul:
             if (left->getBasicType() == EbtStruct || left->getBasicType() == EbtBool)
                 return 0;
         default: break;
     }
     //
     // First try converting the children to compatible types.
     //
     if (left->getType().getStruct() && right->getType().getStruct()) {
         if (left->getType() != right->getType())
             return 0;
     } else {
         TIntermTyped* child = addConversion(op, left->getType(), right);
         if (child)
             right = child;
         else {
             child = addConversion(op, right->getType(), left);
             if (child)
                 left = child;
             else
                 return 0;
         }
     }
     //
     // Need a new node holding things together then.  Make
     // one and promote it to the right type.
     //
     TIntermBinary* node = new TIntermBinary(op);
     node->setLine(line);
     node->setLeft(left);
     node->setRight(right);
     if (!node->promote(infoSink))
         return 0;
     //
     // See if we can fold constants.
     //
     TIntermTyped* typedReturnNode = 0;
     TIntermConstantUnion *leftTempConstant = left->getAsConstantUnion();
     TIntermConstantUnion *rightTempConstant = right->getAsConstantUnion();
     if (leftTempConstant && rightTempConstant) {
         typedReturnNode = leftTempConstant->fold(node->getOp(), rightTempConstant, infoSink);
         if (typedReturnNode)
             return typedReturnNode;
     }
     return node;
 }
 //
 // Connect two nodes through an assignment.
 //
 // Returns the added node.
 //
 TIntermTyped* TIntermediate::addAssign(TOperator op, TIntermTyped* left, TIntermTyped* right, const TSourceLoc& line)
 {
     //
     // Like adding binary math, except the conversion can only go
     // from right to left.
     //
     TIntermBinary* node = new TIntermBinary(op);
     node->setLine(line);
     TIntermTyped* child = addConversion(op, left->getType(), right);
     if (child == 0)
         return 0;
     node->setLeft(left);
     node->setRight(child);
     if (! node->promote(infoSink))
         return 0;
     return node;
 }
 //
 // Connect two nodes through an index operator, where the left node is the base
 // of an array or struct, and the right node is a direct or indirect offset.
 //
 // Returns the added node.
 // The caller should set the type of the returned node.
 //
 TIntermTyped* TIntermediate::addIndex(TOperator op, TIntermTyped* base, TIntermTyped* index, const TSourceLoc& line)
 {
     TIntermBinary* node = new TIntermBinary(op);
     node->setLine(line);
     node->setLeft(base);
     node->setRight(index);
     // caller should set the type
     return node;
 }
 //
 // Add one node as the parent of another that it operates on.
 //
 // Returns the added node.
 //
 TIntermTyped* TIntermediate::addUnaryMath(TOperator op, TIntermNode* childNode, const TSourceLoc& line, TSymbolTable& symbolTable)
 {
     TIntermUnary* node;
     TIntermTyped* child = childNode->getAsTyped();
     if (child == 0) {
         infoSink.info.message(EPrefixInternalError, line, "Bad type in AddUnaryMath");
         return 0;
     }
     switch (op) {
         case EOpLogicalNot:
             if (child->getType().getBasicType() != EbtBool || child->getType().isMatrix() || child->getType().isArray() || child->getType().isVector()) {
                 return 0;
             }
             break;
         case EOpPostIncrement:
         case EOpPreIncrement:
         case EOpPostDecrement:
         case EOpPreDecrement:
         case EOpNegative:
             if (child->getType().getBasicType() == EbtStruct || child->getType().isArray())
                 return 0;
         default: break;
     }
     //
     // Do we need to promote the operand?
     //
     // Note: Implicit promotions were removed from the language.
     //
     TBasicType newType = EbtVoid;
     switch (op) {
         case EOpConstructInt:   newType = EbtInt;   break;
         case EOpConstructBool:  newType = EbtBool;  break;
         case EOpConstructFloat: newType = EbtFloat; break;
         default: break;
     }
     if (newType != EbtVoid) {
         child = addConversion(op, TType(newType, child->getPrecision(), EvqTemporary,
             child->getNominalSize(),
             child->isMatrix(),
             child->isArray()),
             child);
         if (child == 0)
             return 0;
     }
     //
     // For constructors, we are now done, it's all in the conversion.
     //
     switch (op) {
         case EOpConstructInt:
         case EOpConstructBool:
         case EOpConstructFloat:
             return child;
         default: break;
     }
     TIntermConstantUnion *childTempConstant = 0;
     if (child->getAsConstantUnion())
         childTempConstant = child->getAsConstantUnion();
     //
     // Make a new node for the operator.
     //
     node = new TIntermUnary(op);
     node->setLine(line);
     node->setOperand(child);
     if (! node->promote(infoSink))
         return 0;
     if (childTempConstant)  {
         TIntermTyped* newChild = childTempConstant->fold(op, 0, infoSink);
         if (newChild)
             return newChild;
     }
     return node;
 }
 //
 // This is the safe way to change the operator on an aggregate, as it
 // does lots of error checking and fixing.  Especially for establishing
 // a function call's operation on it's set of parameters.  Sequences
 // of instructions are also aggregates, but they just direnctly set
 // their operator to EOpSequence.
 //
 // Returns an aggregate node, which could be the one passed in if
 // it was already an aggregate but no operator was set.
 //
 TIntermAggregate* TIntermediate::setAggregateOperator(TIntermNode* node, TOperator op, const TSourceLoc& line)
 {
     TIntermAggregate* aggNode;
     //
     // Make sure we have an aggregate.  If not turn it into one.
     //
     if (node) {
         aggNode = node->getAsAggregate();
         if (aggNode == 0 || aggNode->getOp() != EOpNull) {
             //
             // Make an aggregate containing this node.
             //
             aggNode = new TIntermAggregate();
             aggNode->getSequence().push_back(node);
         }
     } else
         aggNode = new TIntermAggregate();
     //
     // Set the operator.
     //
     aggNode->setOp(op);
     aggNode->setLine(line);
     return aggNode;
 }
 //
 // Convert one type to another.
 //
 // Returns the node representing the conversion, which could be the same
 // node passed in if no conversion was needed.
 //
 // Return 0 if a conversion can't be done.
 //
 TIntermTyped* TIntermediate::addConversion(TOperator op, const TType& type, TIntermTyped* node)
 {
     //
     // Does the base type allow operation?
     //
     switch (node->getBasicType()) {
         case EbtVoid:
         case EbtSampler2D:
         case EbtSamplerCube:
             return 0;
         default: break;
     }
     //
     // Otherwise, if types are identical, no problem
     //
     if (type == node->getType())
         return node;
     //
     // If one's a structure, then no conversions.
     //
     if (type.getStruct() || node->getType().getStruct())
         return 0;
     //
     // If one's an array, then no conversions.
     //
     if (type.isArray() || node->getType().isArray())
         return 0;
     TBasicType promoteTo;
     switch (op) {
         //
         // Explicit conversions
         //
         case EOpConstructBool:
             promoteTo = EbtBool;
             break;
         case EOpConstructFloat:
             promoteTo = EbtFloat;
             break;
         case EOpConstructInt:
             promoteTo = EbtInt;
             break;
         default:
             //
             // implicit conversions were removed from the language.
             //
             if (type.getBasicType() != node->getType().getBasicType())
                 return 0;
             //
             // Size and structure could still differ, but that's
             // handled by operator promotion.
             //
             return node;
     }
     if (node->getAsConstantUnion()) {
         return (promoteConstantUnion(promoteTo, node->getAsConstantUnion()));
     } else {
         //
         // Add a new newNode for the conversion.
         //
         TIntermUnary* newNode = 0;
         TOperator newOp = EOpNull;
         switch (promoteTo) {
             case EbtFloat:
                 switch (node->getBasicType()) {
                     case EbtInt:   newOp = EOpConvIntToFloat;  break;
                     case EbtBool:  newOp = EOpConvBoolToFloat; break;
                     default:
                         infoSink.info.message(EPrefixInternalError, node->getLine(), "Bad promotion node");
                         return 0;
                 }
                 break;
             case EbtBool:
                 switch (node->getBasicType()) {
                     case EbtInt:   newOp = EOpConvIntToBool;   break;
                     case EbtFloat: newOp = EOpConvFloatToBool; break;
                     default:
                         infoSink.info.message(EPrefixInternalError, node->getLine(), "Bad promotion node");
                         return 0;
                 }
                 break;
             case EbtInt:
                 switch (node->getBasicType()) {
                     case EbtBool:   newOp = EOpConvBoolToInt;  break;
                     case EbtFloat:  newOp = EOpConvFloatToInt; break;
                     default:
                         infoSink.info.message(EPrefixInternalError, node->getLine(), "Bad promotion node");
                         return 0;
                 }
                 break;
             default:
                 infoSink.info.message(EPrefixInternalError, node->getLine(), "Bad promotion type");
                 return 0;
         }
         TType type(promoteTo, node->getPrecision(), EvqTemporary, node->getNominalSize(), node->isMatrix(), node->isArray());
         newNode = new TIntermUnary(newOp, type);
         newNode->setLine(node->getLine());
         newNode->setOperand(node);
         return newNode;
     }
 }
 //
 // Safe way to combine two nodes into an aggregate.  Works with null pointers,
 // a node that's not a aggregate yet, etc.
 //
 // Returns the resulting aggregate, unless 0 was passed in for
 // both existing nodes.
 //
 TIntermAggregate* TIntermediate::growAggregate(TIntermNode* left, TIntermNode* right, const TSourceLoc& line)
 {
     if (left == 0 && right == 0)
         return 0;
     TIntermAggregate* aggNode = 0;
     if (left)
         aggNode = left->getAsAggregate();
     if (!aggNode || aggNode->getOp() != EOpNull) {
         aggNode = new TIntermAggregate;
         if (left)
             aggNode->getSequence().push_back(left);
     }
     if (right)
         aggNode->getSequence().push_back(right);
     aggNode->setLine(line);
     return aggNode;
 }
 //
 // Turn an existing node into an aggregate.
 //
 // Returns an aggregate, unless 0 was passed in for the existing node.
 //
 TIntermAggregate* TIntermediate::makeAggregate(TIntermNode* node, const TSourceLoc& line)
 {
     if (node == 0)
         return 0;
     TIntermAggregate* aggNode = new TIntermAggregate;
     aggNode->getSequence().push_back(node);
     aggNode->setLine(line);
     return aggNode;
 }
 //
 // For "if" test nodes.  There are three children; a condition,
 // a true path, and a false path.  The two paths are in the
 // nodePair.
 //
 // Returns the selection node created.
 //
 TIntermNode* TIntermediate::addSelection(TIntermTyped* cond, TIntermNodePair nodePair, const TSourceLoc& line)
 {
     //
     // For compile time constant selections, prune the code and
     // test now.
     //
     if (cond->getAsTyped() && cond->getAsTyped()->getAsConstantUnion()) {
         if (cond->getAsConstantUnion()->getBConst(0) == true)
             return nodePair.node1 ? setAggregateOperator(nodePair.node1, EOpSequence, nodePair.node1->getLine()) : NULL;
         else
             return nodePair.node2 ? setAggregateOperator(nodePair.node2, EOpSequence, nodePair.node2->getLine()) : NULL;
     }
     TIntermSelection* node = new TIntermSelection(cond, nodePair.node1, nodePair.node2);
     node->setLine(line);
     return node;
 }
 TIntermTyped* TIntermediate::addComma(TIntermTyped* left, TIntermTyped* right, const TSourceLoc& line)
 {
     if (left->getType().getQualifier() == EvqConst && right->getType().getQualifier() == EvqConst) {
         return right;
     } else {
         TIntermTyped *commaAggregate = growAggregate(left, right, line);
         commaAggregate->getAsAggregate()->setOp(EOpComma);
         commaAggregate->setType(right->getType());
         commaAggregate->getTypePointer()->setQualifier(EvqTemporary);
         return commaAggregate;
     }
 }
 //
 // For "?:" test nodes.  There are three children; a condition,
 // a true path, and a false path.  The two paths are specified
 // as separate parameters.
 //
 // Returns the selection node created, or 0 if one could not be.
 //
 TIntermTyped* TIntermediate::addSelection(TIntermTyped* cond, TIntermTyped* trueBlock, TIntermTyped* falseBlock, const TSourceLoc& line)
 {
     //
     // Get compatible types.
     //
     TIntermTyped* child = addConversion(EOpSequence, trueBlock->getType(), falseBlock);
     if (child)
         falseBlock = child;
     else {
         child = addConversion(EOpSequence, falseBlock->getType(), trueBlock);
         if (child)
             trueBlock = child;
         else
             return 0;
     }
     //
     // See if all the operands are constant, then fold it otherwise not.
     //
     if (cond->getAsConstantUnion() && trueBlock->getAsConstantUnion() && falseBlock->getAsConstantUnion()) {
         if (cond->getAsConstantUnion()->getBConst(0))
             return trueBlock;
         else
             return falseBlock;
     }
     //
     // Make a selection node.
     //
     TIntermSelection* node = new TIntermSelection(cond, trueBlock, falseBlock, trueBlock->getType());
     node->getTypePointer()->setQualifier(EvqTemporary);
     node->setLine(line);
     return node;
 }
 //
 // Constant terminal nodes.  Has a union that contains bool, float or int constants
 //
 // Returns the constant union node created.
 //
 TIntermConstantUnion* TIntermediate::addConstantUnion(ConstantUnion* unionArrayPointer, const TType& t, const TSourceLoc& line)
 {
     TIntermConstantUnion* node = new TIntermConstantUnion(unionArrayPointer, t);
     node->setLine(line);
     return node;
 }
 TIntermTyped* TIntermediate::addSwizzle(TVectorFields& fields, const TSourceLoc& line)
 {
     TIntermAggregate* node = new TIntermAggregate(EOpSequence);
     node->setLine(line);
     TIntermConstantUnion* constIntNode;
     TIntermSequence &sequenceVector = node->getSequence();
     ConstantUnion* unionArray;
     for (int i = 0; i < fields.num; i++) {
         unionArray = new ConstantUnion[1];
         unionArray->setIConst(fields.offsets[i]);
         constIntNode = addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConst), line);
         sequenceVector.push_back(constIntNode);
     }
     return node;
 }
 //
 // Create loop nodes.
 //
 TIntermNode* TIntermediate::addLoop(TLoopType type, TIntermNode* init, TIntermTyped* cond, TIntermTyped* expr, TIntermNode* body, const TSourceLoc& line)
 {
     TIntermNode* node = new TIntermLoop(type, init, cond, expr, body);
     node->setLine(line);
     return node;
 }
 //
 // Add branches.
 //
 TIntermBranch* TIntermediate::addBranch(TOperator branchOp, const TSourceLoc& line)
 {
     return addBranch(branchOp, 0, line);
 }
 TIntermBranch* TIntermediate::addBranch(TOperator branchOp, TIntermTyped* expression, const TSourceLoc& line)
 {
     TIntermBranch* node = new TIntermBranch(branchOp, expression);
     node->setLine(line);
     return node;
 }
 //
 // This is to be executed once the final root is put on top by the parsing
 // process.
 //
 bool TIntermediate::postProcess(TIntermNode* root)
 {
     if (root == 0)
         return true;
     //
     // First, finish off the top level sequence, if any
     //
     TIntermAggregate* aggRoot = root->getAsAggregate();
     if (aggRoot && aggRoot->getOp() == EOpNull)
         aggRoot->setOp(EOpSequence);
     return true;
 }
 //
 // This deletes the tree.
 //
 void TIntermediate::remove(TIntermNode* root)
 {
     if (root)
         RemoveAllTreeNodes(root);
 }
 ////////////////////////////////////////////////////////////////
 //
 // Member functions of the nodes used for building the tree.
 //
 ////////////////////////////////////////////////////////////////
 //
 // Say whether or not an operation node changes the value of a variable.
 //
 // Returns true if state is modified.
 //
 bool TIntermOperator::modifiesState() const
 {
     switch (op) {
         case EOpPostIncrement:
         case EOpPostDecrement:
         case EOpPreIncrement:
         case EOpPreDecrement:
         case EOpAssign:
         case EOpAddAssign:
         case EOpSubAssign:
         case EOpMulAssign:
         case EOpVectorTimesMatrixAssign:
         case EOpVectorTimesScalarAssign:
         case EOpMatrixTimesScalarAssign:
         case EOpMatrixTimesMatrixAssign:
         case EOpDivAssign:
             return true;
         default:
             return false;
     }
 }
 //
 // returns true if the operator is for one of the constructors
 //
 bool TIntermOperator::isConstructor() const
 {
     switch (op) {
         case EOpConstructVec2:
         case EOpConstructVec3:
         case EOpConstructVec4:
         case EOpConstructMat2:
         case EOpConstructMat3:
         case EOpConstructMat4:
         case EOpConstructFloat:
         case EOpConstructIVec2:
         case EOpConstructIVec3:
         case EOpConstructIVec4:
         case EOpConstructInt:
         case EOpConstructBVec2:
         case EOpConstructBVec3:
         case EOpConstructBVec4:
         case EOpConstructBool:
         case EOpConstructStruct:
             return true;
         default:
             return false;
     }
 }
 //
 // Make sure the type of a unary operator is appropriate for its
 // combination of operation and operand type.
 //
 // Returns false in nothing makes sense.
 //
 bool TIntermUnary::promote(TInfoSink&)
 {
     switch (op) {
         case EOpLogicalNot:
             if (operand->getBasicType() != EbtBool)
                 return false;
             break;
         case EOpNegative:
         case EOpPostIncrement:
         case EOpPostDecrement:
         case EOpPreIncrement:
         case EOpPreDecrement:
             if (operand->getBasicType() == EbtBool)
                 return false;
             break;
             // operators for built-ins are already type checked against their prototype
         case EOpAny:
         case EOpAll:
         case EOpVectorLogicalNot:
             return true;
         default:
             if (operand->getBasicType() != EbtFloat)
                 return false;
     }
     setType(operand->getType());
     type.setQualifier(EvqTemporary);
     return true;
 }
 //
 // Establishes the type of the resultant operation, as well as
 // makes the operator the correct one for the operands.
 //
 // Returns false if operator can't work on operands.
 //
 bool TIntermBinary::promote(TInfoSink& infoSink)
 {
     // This function only handles scalars, vectors, and matrices.
     if (left->isArray() || right->isArray()) {
         infoSink.info.message(EPrefixInternalError, getLine(), "Invalid operation for arrays");
         return false;
     }
     // GLSL ES 2.0 does not support implicit type casting.
     // So the basic type should always match.
     if (left->getBasicType() != right->getBasicType())
         return false;
     //
     // Base assumption:  just make the type the same as the left
     // operand.  Then only deviations from this need be coded.
     //
     setType(left->getType());
     // The result gets promoted to the highest precision.
     TPrecision higherPrecision = GetHigherPrecision(left->getPrecision(), right->getPrecision());
     getTypePointer()->setPrecision(higherPrecision);
     // Binary operations results in temporary variables unless both
     // operands are const.
     if (left->getQualifier() != EvqConst || right->getQualifier() != EvqConst) {
         getTypePointer()->setQualifier(EvqTemporary);
     }
     int size = std::max(left->getNominalSize(), right->getNominalSize());
     //
     // All scalars. Code after this test assumes this case is removed!
     //
     if (size == 1) {
         switch (op) {
             //
             // Promote to conditional
             //
             case EOpEqual:
             case EOpNotEqual:
             case EOpLessThan:
             case EOpGreaterThan:
             case EOpLessThanEqual:
             case EOpGreaterThanEqual:
                 setType(TType(EbtBool, EbpUndefined));
                 break;
             //
             // And and Or operate on conditionals
             //
             case EOpLogicalAnd:
             case EOpLogicalOr:
                 // Both operands must be of type bool.
                 if (left->getBasicType() != EbtBool || right->getBasicType() != EbtBool)
                     return false;
                 setType(TType(EbtBool, EbpUndefined));
                 break;
             default:
                 break;
         }
         return true;
     }
     // If we reach here, at least one of the operands is vector or matrix.
     // The other operand could be a scalar, vector, or matrix.
     // Are the sizes compatible?
     //
     if (left->getNominalSize() != right->getNominalSize()) {
         // If the nominal size of operands do not match:
         // One of them must be scalar.
         if (left->getNominalSize() != 1 && right->getNominalSize() != 1)
             return false;
         // Operator cannot be of type pure assignment.
         if (op == EOpAssign || op == EOpInitialize)
             return false;
     }
     //
     // Can these two operands be combined?
     //
     TBasicType basicType = left->getBasicType();
     switch (op) {
         case EOpMul:
             if (!left->isMatrix() && right->isMatrix()) {
                 if (left->isVector())
                     op = EOpVectorTimesMatrix;
                 else {
                     op = EOpMatrixTimesScalar;
                     setType(TType(basicType, higherPrecision, EvqTemporary, size, true));
                 }
             } else if (left->isMatrix() && !right->isMatrix()) {
                 if (right->isVector()) {
                     op = EOpMatrixTimesVector;
                     setType(TType(basicType, higherPrecision, EvqTemporary, size, false));
                 } else {
                     op = EOpMatrixTimesScalar;
                 }
             } else if (left->isMatrix() && right->isMatrix()) {
                 op = EOpMatrixTimesMatrix;
             } else if (!left->isMatrix() && !right->isMatrix()) {
                 if (left->isVector() && right->isVector()) {
                     // leave as component product
                 } else if (left->isVector() || right->isVector()) {
                     op = EOpVectorTimesScalar;
                     setType(TType(basicType, higherPrecision, EvqTemporary, size, false));
                 }
             } else {
                 infoSink.info.message(EPrefixInternalError, getLine(), "Missing elses");
                 return false;
             }
             break;
         case EOpMulAssign:
             if (!left->isMatrix() && right->isMatrix()) {
                 if (left->isVector())
                     op = EOpVectorTimesMatrixAssign;
                 else {
                     return false;
                 }
             } else if (left->isMatrix() && !right->isMatrix()) {
                 if (right->isVector()) {
                     return false;
                 } else {
                     op = EOpMatrixTimesScalarAssign;
                 }
             } else if (left->isMatrix() && right->isMatrix()) {
                 op = EOpMatrixTimesMatrixAssign;
             } else if (!left->isMatrix() && !right->isMatrix()) {
                 if (left->isVector() && right->isVector()) {
                     // leave as component product
                 } else if (left->isVector() || right->isVector()) {
                     if (! left->isVector())
                         return false;
                     op = EOpVectorTimesScalarAssign;
                     setType(TType(basicType, higherPrecision, EvqTemporary, size, false));
                 }
             } else {
                 infoSink.info.message(EPrefixInternalError, getLine(), "Missing elses");
                 return false;
             }
             break;
         case EOpAssign:
         case EOpInitialize:
         case EOpAdd:
         case EOpSub:
         case EOpDiv:
         case EOpAddAssign:
         case EOpSubAssign:
         case EOpDivAssign:
             if ((left->isMatrix() && right->isVector()) ||
                 (left->isVector() && right->isMatrix()))
                 return false;
             setType(TType(basicType, higherPrecision, EvqTemporary, size, left->isMatrix() || right->isMatrix()));
             break;
         case EOpEqual:
         case EOpNotEqual:
         case EOpLessThan:
         case EOpGreaterThan:
         case EOpLessThanEqual:
         case EOpGreaterThanEqual:
             if ((left->isMatrix() && right->isVector()) ||
                 (left->isVector() && right->isMatrix()))
                 return false;
             setType(TType(EbtBool, EbpUndefined));
             break;
         default:
             return false;
     }
     return true;
 }
 bool CompareStruct(const TType& leftNodeType, ConstantUnion* rightUnionArray, ConstantUnion* leftUnionArray)
 {
     const TFieldList& fields = leftNodeType.getStruct()->fields();
     size_t structSize = fields.size();
     size_t index = 0;
     for (size_t j = 0; j < structSize; j++) {
         size_t size = fields[j]->type()->getObjectSize();
         for (size_t i = 0; i < size; i++) {
             if (fields[j]->type()->getBasicType() == EbtStruct) {
                 if (!CompareStructure(*(fields[j]->type()), &rightUnionArray[index], &leftUnionArray[index]))
                     return false;
             } else {
                 if (leftUnionArray[index] != rightUnionArray[index])
                     return false;
                 index++;
             }
         }
     }
     return true;
 }
 bool CompareStructure(const TType& leftNodeType, ConstantUnion* rightUnionArray, ConstantUnion* leftUnionArray)
 {
     if (leftNodeType.isArray()) {
         TType typeWithoutArrayness = leftNodeType;
         typeWithoutArrayness.clearArrayness();
         size_t arraySize = leftNodeType.getArraySize();
         for (size_t i = 0; i < arraySize; ++i) {
             size_t offset = typeWithoutArrayness.getObjectSize() * i;
             if (!CompareStruct(typeWithoutArrayness, &rightUnionArray[offset], &leftUnionArray[offset]))
                 return false;
         }
     } else
         return CompareStruct(leftNodeType, rightUnionArray, leftUnionArray);
     return true;
 }
 //
 // The fold functions see if an operation on a constant can be done in place,
 // without generating run-time code.
 //
 // Returns the node to keep using, which may or may not be the node passed in.
 //
 TIntermTyped* TIntermConstantUnion::fold(TOperator op, TIntermTyped* constantNode, TInfoSink& infoSink)
 {
     ConstantUnion *unionArray = getUnionArrayPointer();
     size_t objectSize = getType().getObjectSize();
     if (constantNode) {  // binary operations
         TIntermConstantUnion *node = constantNode->getAsConstantUnion();
         ConstantUnion *rightUnionArray = node->getUnionArrayPointer();
         TType returnType = getType();
         // for a case like float f = 1.2 + vec4(2,3,4,5);
         if (constantNode->getType().getObjectSize() == 1 && objectSize > 1) {
             rightUnionArray = new ConstantUnion[objectSize];
             for (size_t i = 0; i < objectSize; ++i)
                 rightUnionArray[i] = *node->getUnionArrayPointer();
             returnType = getType();
         } else if (constantNode->getType().getObjectSize() > 1 && objectSize == 1) {
             // for a case like float f = vec4(2,3,4,5) + 1.2;
             unionArray = new ConstantUnion[constantNode->getType().getObjectSize()];
             for (size_t i = 0; i < constantNode->getType().getObjectSize(); ++i)
                 unionArray[i] = *getUnionArrayPointer();
             returnType = node->getType();
             objectSize = constantNode->getType().getObjectSize();
         }
         ConstantUnion* tempConstArray = 0;
         TIntermConstantUnion *tempNode;
         bool boolNodeFlag = false;
         switch(op) {
             case EOpAdd:
                 tempConstArray = new ConstantUnion[objectSize];
                 {// support MSVC++6.0
                     for (size_t i = 0; i < objectSize; i++)
                         tempConstArray[i] = unionArray[i] + rightUnionArray[i];
                 }
                 break;
             case EOpSub:
                 tempConstArray = new ConstantUnion[objectSize];
                 {// support MSVC++6.0
                     for (size_t i = 0; i < objectSize; i++)
                         tempConstArray[i] = unionArray[i] - rightUnionArray[i];
                 }
                 break;
             case EOpMul:
             case EOpVectorTimesScalar:
             case EOpMatrixTimesScalar:
                 tempConstArray = new ConstantUnion[objectSize];
                 {// support MSVC++6.0
                     for (size_t i = 0; i < objectSize; i++)
                         tempConstArray[i] = unionArray[i] * rightUnionArray[i];
                 }
                 break;
             case EOpMatrixTimesMatrix:
                 if (getType().getBasicType() != EbtFloat || node->getBasicType() != EbtFloat) {
                     infoSink.info.message(EPrefixInternalError, getLine(), "Constant Folding cannot be done for matrix multiply");
                     return 0;
                 }
                 {// support MSVC++6.0
                     int size = getNominalSize();
                     tempConstArray = new ConstantUnion[size*size];
                     for (int row = 0; row < size; row++) {
                         for (int column = 0; column < size; column++) {
                             tempConstArray[size * column + row].setFConst(0.0f);
                             for (int i = 0; i < size; i++) {
                                 tempConstArray[size * column + row].setFConst(tempConstArray[size * column + row].getFConst() + unionArray[i * size + row].getFConst() * (rightUnionArray[column * size + i].getFConst()));
                             }
                         }
                     }
                 }
                 break;
             case EOpDiv:
                 tempConstArray = new ConstantUnion[objectSize];
                 {// support MSVC++6.0
                     for (size_t i = 0; i < objectSize; i++) {
                         switch (getType().getBasicType()) {
             case EbtFloat:
                 if (rightUnionArray[i] == 0.0f) {
                     infoSink.info.message(EPrefixWarning, getLine(), "Divide by zero error during constant folding");
                     tempConstArray[i].setFConst(unionArray[i].getFConst() < 0 ? -FLT_MAX : FLT_MAX);
                 } else
                     tempConstArray[i].setFConst(unionArray[i].getFConst() / rightUnionArray[i].getFConst());
                 break;
             case EbtInt:
                 if (rightUnionArray[i] == 0) {
                     infoSink.info.message(EPrefixWarning, getLine(), "Divide by zero error during constant folding");
                     tempConstArray[i].setIConst(INT_MAX);
                 } else
                     tempConstArray[i].setIConst(unionArray[i].getIConst() / rightUnionArray[i].getIConst());
                 break;
             default:
                 infoSink.info.message(EPrefixInternalError, getLine(), "Constant folding cannot be done for \"/\"");
                 return 0;
                         }
                     }
                 }
                 break;
             case EOpMatrixTimesVector:
                 if (node->getBasicType() != EbtFloat) {
                     infoSink.info.message(EPrefixInternalError, getLine(), "Constant Folding cannot be done for matrix times vector");
                     return 0;
                 }
                 tempConstArray = new ConstantUnion[getNominalSize()];
                 {// support MSVC++6.0
                     for (int size = getNominalSize(), i = 0; i < size; i++) {
                         tempConstArray[i].setFConst(0.0f);
                         for (int j = 0; j < size; j++) {
                             tempConstArray[i].setFConst(tempConstArray[i].getFConst() + ((unionArray[j*size + i].getFConst()) * rightUnionArray[j].getFConst()));
                         }
                     }
                 }
                 tempNode = new TIntermConstantUnion(tempConstArray, node->getType());
                 tempNode->setLine(getLine());
                 return tempNode;
             case EOpVectorTimesMatrix:
                 if (getType().getBasicType() != EbtFloat) {
                     infoSink.info.message(EPrefixInternalError, getLine(), "Constant Folding cannot be done for vector times matrix");
                     return 0;
                 }
                 tempConstArray = new ConstantUnion[getNominalSize()];
                 {// support MSVC++6.0
                     for (int size = getNominalSize(), i = 0; i < size; i++) {
                         tempConstArray[i].setFConst(0.0f);
                         for (int j = 0; j < size; j++) {
                             tempConstArray[i].setFConst(tempConstArray[i].getFConst() + ((unionArray[j].getFConst()) * rightUnionArray[i*size + j].getFConst()));
                         }
                     }
                 }
                 break;
             case EOpLogicalAnd: // this code is written for possible future use, will not get executed currently
                 tempConstArray = new ConstantUnion[objectSize];
                 {// support MSVC++6.0
                     for (size_t i = 0; i < objectSize; i++)
                         tempConstArray[i] = unionArray[i] && rightUnionArray[i];
                 }
                 break;
             case EOpLogicalOr: // this code is written for possible future use, will not get executed currently
                 tempConstArray = new ConstantUnion[objectSize];
                 {// support MSVC++6.0
                     for (size_t i = 0; i < objectSize; i++)
                         tempConstArray[i] = unionArray[i] || rightUnionArray[i];
                 }
                 break;
             case EOpLogicalXor:
                 tempConstArray = new ConstantUnion[objectSize];
                 {// support MSVC++6.0
                     for (size_t i = 0; i < objectSize; i++)
                         switch (getType().getBasicType()) {
             case EbtBool: tempConstArray[i].setBConst((unionArray[i] == rightUnionArray[i]) ? false : true); break;
             default: assert(false && "Default missing");
                     }
                 }
                 break;
             case EOpLessThan:
                 assert(objectSize == 1);
                 tempConstArray = new ConstantUnion[1];
                 tempConstArray->setBConst(*unionArray < *rightUnionArray);
                 returnType = TType(EbtBool, EbpUndefined, EvqConst);
                 break;
             case EOpGreaterThan:
                 assert(objectSize == 1);
                 tempConstArray = new ConstantUnion[1];
                 tempConstArray->setBConst(*unionArray > *rightUnionArray);
                 returnType = TType(EbtBool, EbpUndefined, EvqConst);
                 break;
             case EOpLessThanEqual:
                 {
                     assert(objectSize == 1);
                     ConstantUnion constant;
                     constant.setBConst(*unionArray > *rightUnionArray);
                     tempConstArray = new ConstantUnion[1];
                     tempConstArray->setBConst(!constant.getBConst());
                     returnType = TType(EbtBool, EbpUndefined, EvqConst);
                     break;
                 }
             case EOpGreaterThanEqual:
                 {
                     assert(objectSize == 1);
                     ConstantUnion constant;
                     constant.setBConst(*unionArray < *rightUnionArray);
                     tempConstArray = new ConstantUnion[1];
                     tempConstArray->setBConst(!constant.getBConst());
                     returnType = TType(EbtBool, EbpUndefined, EvqConst);
                     break;
                 }
             case EOpEqual:
                 if (getType().getBasicType() == EbtStruct) {
                     if (!CompareStructure(node->getType(), node->getUnionArrayPointer(), unionArray))
                         boolNodeFlag = true;
                 } else {
                     for (size_t i = 0; i < objectSize; i++) {
                         if (unionArray[i] != rightUnionArray[i]) {
                             boolNodeFlag = true;
                             break;  // break out of for loop
                         }
                     }
                 }
                 tempConstArray = new ConstantUnion[1];
                 if (!boolNodeFlag) {
                     tempConstArray->setBConst(true);
                 }
                 else {
                     tempConstArray->setBConst(false);
                 }
                 tempNode = new TIntermConstantUnion(tempConstArray, TType(EbtBool, EbpUndefined, EvqConst));
                 tempNode->setLine(getLine());
                 return tempNode;
             case EOpNotEqual:
                 if (getType().getBasicType() == EbtStruct) {
                     if (CompareStructure(node->getType(), node->getUnionArrayPointer(), unionArray))
                         boolNodeFlag = true;
                 } else {
                     for (size_t i = 0; i < objectSize; i++) {
                         if (unionArray[i] == rightUnionArray[i]) {
                             boolNodeFlag = true;
                             break;  // break out of for loop
                         }
                     }
                 }
                 tempConstArray = new ConstantUnion[1];
                 if (!boolNodeFlag) {
                     tempConstArray->setBConst(true);
                 }
                 else {
                     tempConstArray->setBConst(false);
                 }
                 tempNode = new TIntermConstantUnion(tempConstArray, TType(EbtBool, EbpUndefined, EvqConst));
                 tempNode->setLine(getLine());
                 return tempNode;
             default:
                 infoSink.info.message(EPrefixInternalError, getLine(), "Invalid operator for constant folding");
                 return 0;
         }
         tempNode = new TIntermConstantUnion(tempConstArray, returnType);
         tempNode->setLine(getLine());
         return tempNode;
     } else {
         //
         // Do unary operations
         //
         TIntermConstantUnion *newNode = 0;
         ConstantUnion* tempConstArray = new ConstantUnion[objectSize];
         for (size_t i = 0; i < objectSize; i++) {
             switch(op) {
                 case EOpNegative:
                     switch (getType().getBasicType()) {
                         case EbtFloat: tempConstArray[i].setFConst(-unionArray[i].getFConst()); break;
                         case EbtInt:   tempConstArray[i].setIConst(-unionArray[i].getIConst()); break;
                         default:
                             infoSink.info.message(EPrefixInternalError, getLine(), "Unary operation not folded into constant");
                             return 0;
                     }
                     break;
                 case EOpLogicalNot: // this code is written for possible future use, will not get executed currently
                     switch (getType().getBasicType()) {
                         case EbtBool:  tempConstArray[i].setBConst(!unionArray[i].getBConst()); break;
                         default:
                             infoSink.info.message(EPrefixInternalError, getLine(), "Unary operation not folded into constant");
                             return 0;
                     }
                     break;
                 default:
                     return 0;
             }
         }
         newNode = new TIntermConstantUnion(tempConstArray, getType());
         newNode->setLine(getLine());
         return newNode;
     }
 }
 TIntermTyped* TIntermediate::promoteConstantUnion(TBasicType promoteTo, TIntermConstantUnion* node)
 {
     size_t size = node->getType().getObjectSize();
     ConstantUnion *leftUnionArray = new ConstantUnion[size];
     for (size_t i = 0; i < size; i++) {
         switch (promoteTo) {
             case EbtFloat:
                 switch (node->getType().getBasicType()) {
                     case EbtInt:
                         leftUnionArray[i].setFConst(static_cast<float>(node->getIConst(i)));
                         break;
                     case EbtBool:
                         leftUnionArray[i].setFConst(static_cast<float>(node->getBConst(i)));
                         break;
                     case EbtFloat:
                         leftUnionArray[i].setFConst(static_cast<float>(node->getFConst(i)));
                         break;
                     default:
                         infoSink.info.message(EPrefixInternalError, node->getLine(), "Cannot promote");
                         return 0;
                 }
                 break;
             case EbtInt:
                 switch (node->getType().getBasicType()) {
                     case EbtInt:
                         leftUnionArray[i].setIConst(static_cast<int>(node->getIConst(i)));
                         break;
                     case EbtBool:
                         leftUnionArray[i].setIConst(static_cast<int>(node->getBConst(i)));
                         break;
                     case EbtFloat:
                         leftUnionArray[i].setIConst(static_cast<int>(node->getFConst(i)));
                         break;
                     default:
                         infoSink.info.message(EPrefixInternalError, node->getLine(), "Cannot promote");
                         return 0;
                 }
                 break;
             case EbtBool:
                 switch (node->getType().getBasicType()) {
                     case EbtInt:
                         leftUnionArray[i].setBConst(node->getIConst(i) != 0);
                         break;
                     case EbtBool:
                         leftUnionArray[i].setBConst(node->getBConst(i));
                         break;
                     case EbtFloat:
                         leftUnionArray[i].setBConst(node->getFConst(i) != 0.0f);
                         break;
                     default:
                         infoSink.info.message(EPrefixInternalError, node->getLine(), "Cannot promote");
                         return 0;
                 }
                 break;
             default:
                 infoSink.info.message(EPrefixInternalError, node->getLine(), "Incorrect data type found");
                 return 0;
         }
     }
     const TType& t = node->getType();
     return addConstantUnion(leftUnionArray, TType(promoteTo, t.getPrecision(), t.getQualifier(), t.getNominalSize(), t.isMatrix(), t.isArray()), node->getLine());
 }
 // static
 TString TIntermTraverser::hash(const TString& name, ShHashFunction64 hashFunction)
 {
     if (hashFunction == NULL || name.empty())
         return name;
     khronos_uint64_t number = (*hashFunction)(name.c_str(), name.length());
     TStringStream stream;
     stream << HASHED_NAME_PREFIX << std::hex << number;
     TString hashedName = stream.str();
     return hashedName;
 }

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gfx/angle/src/compiler/Intermediate.cpp@129ffea94266 (annotated)

gfx/angle/src/compiler/Intermediate.cpp