1 // 2 // Copyright 2019 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 7 #ifndef COMPILER_TRANSLATOR_VALIDATEAST_H_ 8 #define COMPILER_TRANSLATOR_VALIDATEAST_H_ 9 10 #include "compiler/translator/BaseTypes.h" 11 #include "compiler/translator/Common.h" 12 13 namespace sh 14 { 15 class TDiagnostics; 16 class TIntermNode; 17 18 // The following options (stored in Compiler) tell the validator what to validate. Some validations 19 // are conditional to certain passes. 20 struct ValidateASTOptions 21 { 22 // TODO: add support for the flags marked with TODO. http://anglebug.com/2733 23 24 // Check that every node always has only one parent, 25 bool validateSingleParent = true; 26 // Check that all symbols reference TVariables that have been declared. For built-ins, this 27 // makes sure that the same GLSL built-in uses the same TVariable consistently. 28 bool validateVariableReferences = true; 29 // Whether validateVariableReferences should also include specialization constants. Their 30 // declaration is output after their usage is discovered, so this is disabled until then. 31 bool validateSpecConstReferences = false; 32 // Check that TIntermUnary and TIntermAggregate nodes with a built-in op reference a function 33 // with said op. 34 bool validateBuiltInOps = true; 35 // Check that all EOpCallFunctionInAST have their corresponding function definitions in the AST, 36 // with matching symbol ids. There should also be at least a prototype declaration before the 37 // function is called. 38 bool validateFunctionCall = true; 39 // Check that EOpCallInternalRawFunction is not used. This OP is deprecated and needs to be 40 // removed. http://anglebug.com/6059 41 bool validateNoRawFunctionCalls = true; 42 // Check that there are no null nodes where they are not allowed, for example as children of 43 // TIntermDeclaration or TIntermBlock. 44 bool validateNullNodes = true; 45 // Check that symbols that reference variables have consistent qualifiers and symbol ids with 46 // the variable declaration. The following needs to be validated: 47 // 48 // Implemented: 49 // 50 // - Function parameters having one of EvqParam* qualifiers. 51 // - No const qualifier on opaque function parameters. 52 // - gl_ClipDistance, gl_CullDistance and gl_LastFragData are correctly qualified even when 53 // redeclared in the shader. 54 // 55 // TODO: 56 // 57 // - Function-local variables must have the EvqTemporary qualifier. 58 // - Symbol references and declarations have identical qualifiers. 59 bool validateQualifiers = true; 60 // Check that every symbol has its precision specified. That includes variables, block members, 61 // function parameters and return values. 62 bool validatePrecision = true; 63 // Check that variable declarations that can't have initializers don't have initializers 64 // (varyings, uniforms for example). 65 bool validateInitializers = true; // TODO 66 // Check that there is only one TFunction with each function name referenced in the nodes (no 67 // two TFunctions with the same name, taking internal/non-internal namespaces into account). 68 bool validateUniqueFunctions = true; // TODO 69 // Check that references to structs are matched with the corresponding struct declaration. 70 bool validateStructUsage = true; 71 // Check that expression nodes have the correct type considering their operand(s). The 72 // following validation is possible: 73 // 74 // Implemented: 75 // 76 // - Binary node that indexes T[] should have type T 77 // - Binary nodes with EOpIndexDirect* should have a constant as the right node 78 // - Switch nodes should have an integer type in the selector 79 // 80 // TODO: 81 // 82 // - Function calls (including built-ins) have the same return type in the node and function. 83 // - Unary and binary operators have the correct type based on operands 84 // - Swizzle result has same type as the operand except for vector size 85 // - Ternary operator has the same type as the operands 86 // - Case expressions have the same type as the switch selector 87 bool validateExpressionTypes = true; 88 // If SeparateDeclarations has been run, check for the absence of multi declarations as well. 89 bool validateMultiDeclarations = false; 90 // If PruneNoOps has been run, check that no statements are ever added after branches in the 91 // same block. Those statements would be dead code. 92 bool validateNoStatementsAfterBranch = false; 93 94 // Once set, disallows any further transformations on the tree. Used before AST post-processing 95 // which requires that the tree remains unmodified. 96 bool validateNoMoreTransformations = false; 97 }; 98 99 // Check for errors and output error messages on the context. 100 // Returns true if there are no errors. 101 bool ValidateAST(TIntermNode *root, TDiagnostics *diagnostics, const ValidateASTOptions &options); 102 103 } // namespace sh 104 105 #endif // COMPILER_TRANSLATOR_VALIDATESWITCH_H_ 106