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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SKSL_IRGENERATOR
#define SKSL_IRGENERATOR
#include "src/sksl/SkSLASTFile.h"
#include "src/sksl/SkSLASTNode.h"
#include "src/sksl/SkSLErrorReporter.h"
#include "src/sksl/ir/SkSLBlock.h"
#include "src/sksl/ir/SkSLExpression.h"
#include "src/sksl/ir/SkSLExtension.h"
#include "src/sksl/ir/SkSLFunctionDefinition.h"
#include "src/sksl/ir/SkSLInterfaceBlock.h"
#include "src/sksl/ir/SkSLModifiers.h"
#include "src/sksl/ir/SkSLModifiersDeclaration.h"
#include "src/sksl/ir/SkSLProgram.h"
#include "src/sksl/ir/SkSLSection.h"
#include "src/sksl/ir/SkSLStatement.h"
#include "src/sksl/ir/SkSLSymbolTable.h"
#include "src/sksl/ir/SkSLType.h"
#include "src/sksl/ir/SkSLTypeReference.h"
#include "src/sksl/ir/SkSLVarDeclarations.h"
#include "src/sksl/ir/SkSLVariableReference.h"
namespace SkSL {
struct Swizzle;
/**
* Performs semantic analysis on an abstract syntax tree (AST) and produces the corresponding
* (unoptimized) intermediate representation (IR).
*/
class IRGenerator {
public:
IRGenerator(const Context* context, std::shared_ptr<SymbolTable> root,
ErrorReporter& errorReporter);
void convertProgram(Program::Kind kind,
const char* text,
size_t length,
SymbolTable& types,
std::vector<std::unique_ptr<ProgramElement>>* result);
/**
* If both operands are compile-time constants and can be folded, returns an expression
* representing the folded value. Otherwise, returns null. Note that unlike most other functions
* here, null does not represent a compilation error.
*/
std::unique_ptr<Expression> constantFold(const Expression& left,
Token::Kind op,
const Expression& right) const;
std::unique_ptr<Expression> getArg(int offset, String name) const;
Program::Inputs fInputs;
const Program::Settings* fSettings;
const Context& fContext;
Program::Kind fKind;
private:
/**
* Prepare to compile a program. Resets state, pushes a new symbol table, and installs the
* settings.
*/
void start(const Program::Settings* settings,
std::vector<std::unique_ptr<ProgramElement>>* inherited);
/**
* Performs cleanup after compilation is complete.
*/
void finish();
void pushSymbolTable();
void popSymbolTable();
std::unique_ptr<VarDeclarations> convertVarDeclarations(const ASTNode& decl,
Variable::Storage storage);
void convertFunction(const ASTNode& f);
std::unique_ptr<Statement> convertStatement(const ASTNode& statement);
std::unique_ptr<Expression> convertExpression(const ASTNode& expression);
std::unique_ptr<ModifiersDeclaration> convertModifiersDeclaration(const ASTNode& m);
const Type* convertType(const ASTNode& type);
std::unique_ptr<Expression> call(int offset,
const FunctionDeclaration& function,
std::vector<std::unique_ptr<Expression>> arguments);
int callCost(const FunctionDeclaration& function,
const std::vector<std::unique_ptr<Expression>>& arguments);
std::unique_ptr<Expression> call(int offset, std::unique_ptr<Expression> function,
std::vector<std::unique_ptr<Expression>> arguments);
int coercionCost(const Expression& expr, const Type& type);
std::unique_ptr<Expression> coerce(std::unique_ptr<Expression> expr, const Type& type);
std::unique_ptr<Block> convertBlock(const ASTNode& block);
std::unique_ptr<Statement> convertBreak(const ASTNode& b);
std::unique_ptr<Expression> convertNumberConstructor(
int offset,
const Type& type,
std::vector<std::unique_ptr<Expression>> params);
std::unique_ptr<Expression> convertCompoundConstructor(
int offset,
const Type& type,
std::vector<std::unique_ptr<Expression>> params);
std::unique_ptr<Expression> convertConstructor(int offset,
const Type& type,
std::vector<std::unique_ptr<Expression>> params);
std::unique_ptr<Statement> convertContinue(const ASTNode& c);
std::unique_ptr<Statement> convertDiscard(const ASTNode& d);
std::unique_ptr<Statement> convertDo(const ASTNode& d);
std::unique_ptr<Statement> convertSwitch(const ASTNode& s);
std::unique_ptr<Expression> convertBinaryExpression(const ASTNode& expression);
std::unique_ptr<Extension> convertExtension(int offset, StringFragment name);
std::unique_ptr<Statement> convertExpressionStatement(const ASTNode& s);
std::unique_ptr<Statement> convertFor(const ASTNode& f);
std::unique_ptr<Expression> convertIdentifier(const ASTNode& identifier);
std::unique_ptr<Statement> convertIf(const ASTNode& s);
std::unique_ptr<Expression> convertIndex(std::unique_ptr<Expression> base,
const ASTNode& index);
std::unique_ptr<InterfaceBlock> convertInterfaceBlock(const ASTNode& s);
Modifiers convertModifiers(const Modifiers& m);
std::unique_ptr<Expression> convertPrefixExpression(const ASTNode& expression);
std::unique_ptr<Statement> convertReturn(const ASTNode& r);
std::unique_ptr<Section> convertSection(const ASTNode& e);
std::unique_ptr<Expression> getCap(int offset, String name);
std::unique_ptr<Expression> convertCallExpression(const ASTNode& expression);
std::unique_ptr<Expression> convertFieldExpression(const ASTNode& expression);
std::unique_ptr<Expression> convertIndexExpression(const ASTNode& expression);
std::unique_ptr<Expression> convertPostfixExpression(const ASTNode& expression);
std::unique_ptr<Expression> convertTypeField(int offset, const Type& type,
StringFragment field);
std::unique_ptr<Expression> convertField(std::unique_ptr<Expression> base,
StringFragment field);
std::unique_ptr<Expression> convertSwizzle(std::unique_ptr<Expression> base,
StringFragment fields);
std::unique_ptr<Expression> convertTernaryExpression(const ASTNode& expression);
std::unique_ptr<Statement> convertVarDeclarationStatement(const ASTNode& s);
std::unique_ptr<Statement> convertWhile(const ASTNode& w);
void convertEnum(const ASTNode& e);
std::unique_ptr<Block> applyInvocationIDWorkaround(std::unique_ptr<Block> main);
// returns a statement which converts sk_Position from device to normalized coordinates
std::unique_ptr<Statement> getNormalizeSkPositionCode();
void checkValid(const Expression& expr);
void setRefKind(const Expression& expr, VariableReference::RefKind kind);
void getConstantInt(const Expression& value, int64_t* out);
bool checkSwizzleWrite(const Swizzle& swizzle);
std::unique_ptr<ASTFile> fFile;
const FunctionDeclaration* fCurrentFunction;
std::unordered_map<String, Program::Settings::Value> fCapsMap;
std::shared_ptr<SymbolTable> fRootSymbolTable;
std::shared_ptr<SymbolTable> fSymbolTable;
// holds extra temp variable declarations needed for the current function
std::vector<std::unique_ptr<Statement>> fExtraVars;
int fLoopLevel;
int fSwitchLevel;
// count of temporary variables we have created
int fTmpCount;
ErrorReporter& fErrors;
int fInvocations;
std::vector<std::unique_ptr<ProgramElement>>* fProgramElements;
const Variable* fSkPerVertex = nullptr;
Variable* fRTAdjust;
Variable* fRTAdjustInterfaceBlock;
int fRTAdjustFieldIndex;
bool fStarted = false;
friend class AutoSymbolTable;
friend class AutoLoopLevel;
friend class AutoSwitchLevel;
friend class Compiler;
};
}
#endif