Some rationalization of TIntermediate (to own it's own tree root) and TParseHelper for better encapsulation. Needed by some upcoming intra-stage link validation.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@22914 e7fa87d3-cd2b-0410-9028-fcbf551c1848

glslang/MachineIndependent/Intermediate.cpp

@@ -41,6 +41,8 @@
 #include "localintermediate.h"
 #include "QualifierAlive.h"
 #include "RemoveTree.h"
+#include "SymbolTable.h"
+
 #include <float.h>
 
 namespace glslang {
@@ -910,10 +912,10 @@ void TIntermediate::addSymbolLinkageNode(TIntermAggregate*& linkage, const TVari
 //
 // This deletes the tree.
 //
-void TIntermediate::remove(TIntermNode* root)
+void TIntermediate::removeTree()
 {
-    if (root)
-        RemoveAllTreeNodes(root);
+    if (treeRoot)
+        RemoveAllTreeNodes(treeRoot);
 }
 
 ////////////////////////////////////////////////////////////////

glslang/MachineIndependent/ParseHelper.cpp

@@ -35,6 +35,7 @@
 //
 
 #include "ParseHelper.h"
+
 #include "osinclude.h"
 #include <stdarg.h>
 #include <algorithm>
@@ -47,11 +48,11 @@ namespace glslang {
 
 TParseContext::TParseContext(TSymbolTable& symt, TIntermediate& interm, bool pb, int v, EProfile p, EShLanguage L, TInfoSink& is,                             
                              bool fc, EShMessages m) : 
-            intermediate(interm), symbolTable(symt), infoSink(is), language(L), treeRoot(0), linkage(0),
-            numErrors(0), loopNestingLevel(0),
-            structNestingLevel(0), inTypeParen(false), parsingBuiltins(pb),
+            intermediate(interm), symbolTable(symt), infoSink(is), language(L),
             version(v), profile(p), forwardCompatible(fc), messages(m),    
-            contextPragma(true, false), afterEOF(false), tokensBeforeEOF(false)
+            contextPragma(true, false), loopNestingLevel(0), structNestingLevel(0),
+            linkage(0), tokensBeforeEOF(false),
+            parsingBuiltins(pb), numErrors(0), afterEOF(false)
 {
     currentLoc.line = 1;
     currentLoc.string = 0;

glslang/MachineIndependent/ParseHelper.h

@@ -69,50 +69,10 @@ public:
     TParseContext(TSymbolTable&, TIntermediate&, bool parsingBuiltins, int version, EProfile, EShLanguage, TInfoSink&,
                   bool forwardCompatible = false, EShMessages messages = EShMsgDefault);
 
-    TScanContext* scanContext;
-    TPpContext* ppContext;
-    TIntermediate& intermediate; // to hold and build a parse tree
-    TSymbolTable& symbolTable;   // symbol table that goes with the current language, version, and profile
-    TInfoSink& infoSink;
-    EShLanguage language;        // vertex or fragment language
-    TIntermNode* treeRoot;       // root of parse tree being created
-    TIntermAggregate *linkage;   // aggregate node of objects the linker may need, if not reference by the rest of the AST
-    int numErrors;               // number of compile-time errors encountered
-    int loopNestingLevel;        // 0 if outside all loops
-    int structNestingLevel;      // 0 if outside blocks and structures
-    TList<TIntermSequence*> switchSequenceStack;  // case, node, case, case, node, ...; ensure only one node between cases;   stack of them for nesting
-    bool inTypeParen;            // true if in parentheses, looking only for an identifier
-    const TType* currentFunctionType;  // the return type of the function that's currently being parsed
-    bool functionReturnsValue;   // true if a non-void function has a return
-    bool parsingBuiltins;        // true if parsing built-in symbols/functions
-
-    int version;                 // version, updated by #version in the shader
-    EProfile profile;            // the declared profile in the shader (core by default)
-    bool forwardCompatible;      // true if errors are to be given for use of deprecated features
-    EShMessages messages;        // errors/warnings
-    TMap<TString, TBehavior> extensionBehavior;    // for each extension string, what it's current enablement is
-
-    struct TPragma contextPragma;
-    TPrecisionQualifier defaultPrecision[EbtNumTypes];
-    static const int maxSamplerIndex = EsdNumDims * (EbtNumTypes * (2 * 2)); // see computeSamplerTypeIndex()
-    TPrecisionQualifier defaultSamplerPrecision[maxSamplerIndex];
-    bool afterEOF;
-    bool tokensBeforeEOF;
-    TSourceLoc currentLoc;
-    const TString* blockName;
-    TQualifier globalUniformDefaults;
-    TQualifier globalInputDefaults;
-    TQualifier globalOutputDefaults;
-    TQualifier currentBlockDefaults;
-
-    void initializeExtensionBehavior();
-    const char* getPreamble();
+public:
     bool parseShaderStrings(TPpContext&, char* strings[], int strLen[], int numStrings);
-    void parserError(const char *s);
-
-    void handlePragma(const char **tokens, int numTokens);
-    TBehavior getExtensionBehavior(const char* behavior);
-    void updateExtensionBehavior(const char* extName, const char* behavior);
+    void initializeExtensionBehavior();
+    void parserError(const char *s);     // for bison's yyerror
 
     void C_DECL error(TSourceLoc, const char *szReason, const char *szToken,
                       const char *szExtraInfoFormat, ...);
@@ -120,6 +80,8 @@ public:
                       const char *szExtraInfoFormat, ...);
     bool reservedErrorCheck(TSourceLoc, const TString& identifier);
 
+    void updateExtensionBehavior(const char* extName, const char* behavior);
+    void handlePragma(const char **tokens, int numTokens);
     TIntermTyped* handleVariable(TSourceLoc, TSymbol* symbol, TString* string);
     TIntermTyped* handleBracketDereference(TSourceLoc, TIntermTyped* base, TIntermTyped* index);
     TIntermTyped* handleDotDereference(TSourceLoc, TIntermTyped* base, TString& field);
@@ -197,6 +159,59 @@ public:
     void requireNotRemoved(TSourceLoc, EProfile callingProfile, int removedVersion, const char *featureDesc);
     void fullIntegerCheck(TSourceLoc, const char* op);
     void doubleCheck(TSourceLoc, const char* op);
+
+    void setScanContext(TScanContext* c) { scanContext = c; }
+    TScanContext* getScanContext() const { return scanContext; }
+    void setPpContext(TPpContext* c) { ppContext = c; }
+    TPpContext* getPpContext() const { return ppContext; }
+    int getNumErrors() const { return numErrors; }
+
+protected:
+    const char* getPreamble();
+    TBehavior getExtensionBehavior(const char* behavior);
+
+public:
+    //
+    // Generally, bison productions, the scanner, and the PP need read/write access to these; just give them direct access
+    //
+
+    TIntermediate& intermediate; // helper for making and hooking up pieces of the parse tree
+    TSymbolTable& symbolTable;   // symbol table that goes with the current language, version, and profile
+    TInfoSink& infoSink;
+
+    // compilation mode
+    EShLanguage language;        // vertex or fragment language
+    int version;                 // version, updated by #version in the shader
+    EProfile profile;            // the declared profile in the shader (core by default)
+    bool forwardCompatible;      // true if errors are to be given for use of deprecated features
+    EShMessages messages;        // errors/warnings
+
+    // Current state of parsing
+    struct TPragma contextPragma;
+    int loopNestingLevel;        // 0 if outside all loops
+    int structNestingLevel;      // 0 if outside blocks and structures
+    TList<TIntermSequence*> switchSequenceStack;  // case, node, case, case, node, ...; ensure only one node between cases;   stack of them for nesting
+    const TType* currentFunctionType;  // the return type of the function that's currently being parsed
+    bool functionReturnsValue;   // true if a non-void function has a return
+    const TString* blockName;
+    TQualifier currentBlockDefaults;
+    TIntermAggregate *linkage;   // aggregate node of objects the linker may need, if not referenced by the rest of the AST
+    TPrecisionQualifier defaultPrecision[EbtNumTypes];
+    TSourceLoc currentLoc;
+    bool tokensBeforeEOF;
+
+protected:
+    TScanContext* scanContext;
+    TPpContext* ppContext;
+    int numErrors;               // number of compile-time errors encountered
+    bool parsingBuiltins;        // true if parsing built-in symbols/functions
+    TMap<TString, TBehavior> extensionBehavior;    // for each extension string, what it's current enablement is
+    static const int maxSamplerIndex = EsdNumDims * (EbtNumTypes * (2 * 2)); // see computeSamplerTypeIndex()
+    TPrecisionQualifier defaultSamplerPrecision[maxSamplerIndex];
+    bool afterEOF;
+    TQualifier globalUniformDefaults;
+    TQualifier globalInputDefaults;
+    TQualifier globalOutputDefaults;
 };
 
 } // end namespace glslang

glslang/MachineIndependent/Scan.cpp

@@ -245,7 +245,7 @@ int yylex(YYSTYPE* glslangTokenDesc, glslang::TParseContext& parseContext)
 {
     glslang::TParserToken token(*glslangTokenDesc);
 
-    return parseContext.scanContext->tokenize(parseContext.ppContext, token);
+    return parseContext.getScanContext()->tokenize(parseContext.getPpContext(), token);
 }
 
 namespace {

glslang/MachineIndependent/ShaderLang.cpp

@@ -108,8 +108,8 @@ bool InitializeSymbolTable(const TString& builtIns, int version, EProfile profil
     TParseContext parseContext(symbolTable, intermediate, true, version, profile, language, infoSink);
     TPpContext ppContext(parseContext);
     TScanContext scanContext(parseContext);
-    parseContext.scanContext = &scanContext;
-    parseContext.ppContext = &ppContext;
+    parseContext.setScanContext(&scanContext);
+    parseContext.setPpContext(&ppContext);
     
     //
     // Parse the built-ins.  This should only happen once per
@@ -403,8 +403,8 @@ int __fastcall ShFinalize()
 // Do an actual compile on the given strings.  The result is left 
 // in the given compile object.
 //
-// Return:  The return value of ShCompile is really boolean, indicating
-// success or failure.
+// Return:  The return value is really boolean, indicating
+// success (1) or failure (0).
 //
 int ShCompile(
     const ShHandle handle,
@@ -478,8 +478,8 @@ int ShCompile(
     TParseContext parseContext(symbolTable, intermediate, false, version, profile, compiler->getLanguage(), compiler->infoSink, forwardCompatible, messages);
     glslang::TScanContext scanContext(parseContext);
     TPpContext ppContext(parseContext);
-    parseContext.scanContext = &scanContext;
-    parseContext.ppContext = &ppContext;
+    parseContext.setScanContext(&scanContext);
+    parseContext.setPpContext(&ppContext);
 
     TSourceLoc beginning;
     beginning.line = 1;
@@ -511,38 +511,36 @@ int ShCompile(
     bool ret = parseContext.parseShaderStrings(ppContext, const_cast<char**>(shaderStrings), lengths, numStrings);
     if (! ret)
         success = false;
-    intermediate.addSymbolLinkageNodes(parseContext.treeRoot, parseContext.linkage, parseContext.language, symbolTable);
+    intermediate.addSymbolLinkageNodes(intermediate.getTreeRoot(), parseContext.linkage, parseContext.language, symbolTable);
 
     // Clean up the symbol table before deallocating the pool memory it used.
     // The AST is self-sufficient now, so it can be done before the rest of compilation/linking.
     delete symbolTableMemory;
 
-    if (success && parseContext.treeRoot) {
+    if (success && intermediate.getTreeRoot()) {
         if (optLevel == EShOptNoGeneration)
             parseContext.infoSink.info.message(EPrefixNone, "No errors.  No code generation or linking was requested.");
         else {
-            success = intermediate.postProcess(parseContext.treeRoot, parseContext.language);
+            success = intermediate.postProcess(intermediate.getTreeRoot(), parseContext.language);
 
             if (success) {
-                if (messages & EShMsgAST)
-                    intermediate.outputTree(parseContext.treeRoot, parseContext.infoSink);
-
                 //
                 // Call the machine dependent compiler
                 //
-                if (! compiler->compile(parseContext.treeRoot, parseContext.version, parseContext.profile))
+                if (! compiler->compile(intermediate.getTreeRoot(), parseContext.version, parseContext.profile))
                     success = false;
             }
         }
     } else if (! success) {
         parseContext.infoSink.info.prefix(EPrefixError);
-        parseContext.infoSink.info << parseContext.numErrors << " compilation errors.  No code generated.\n\n";
+        parseContext.infoSink.info << parseContext.getNumErrors() << " compilation errors.  No code generated.\n\n";
         success = false;
-        if (messages & EShMsgAST)
-            intermediate.outputTree(parseContext.treeRoot, parseContext.infoSink);
     }
 
-    intermediate.remove(parseContext.treeRoot);
+    if (messages & EShMsgAST)
+        intermediate.outputTree(parseContext.infoSink);
+
+    intermediate.removeTree();
     //
     // Throw away all the temporary memory used by the compilation process.
     //

glslang/MachineIndependent/glslang.y

@@ -2438,11 +2438,11 @@ jump_statement
 translation_unit
     : external_declaration {
         $$ = $1;
-        parseContext.treeRoot = $$;
+        parseContext.intermediate.setTreeRoot($$);
     }
     | translation_unit external_declaration {
         $$ = parseContext.intermediate.growAggregate($1, $2);
-        parseContext.treeRoot = $$;
+        parseContext.intermediate.setTreeRoot($$);
     }
     ;
 

glslang/MachineIndependent/intermOut.cpp

@@ -35,6 +35,7 @@
 //
 
 #include "localintermediate.h"
+#include "../Include/InfoSink.h"
 
 namespace glslang {
 
@@ -567,9 +568,9 @@ bool OutputSwitch(bool /* preVisit */, TIntermSwitch* node, TIntermTraverser* it
 // Individual functions can be initialized to 0 to skip processing of that
 // type of node.  It's children will still be processed.
 //
-void TIntermediate::outputTree(TIntermNode* root, TInfoSink& infoSink)
+void TIntermediate::outputTree(TInfoSink& infoSink)
 {
-    if (root == 0)
+    if (treeRoot == 0)
         return;
 
     TOutputTraverser it(infoSink);
@@ -584,7 +585,7 @@ void TIntermediate::outputTree(TIntermNode* root, TInfoSink& infoSink)
     it.visitBranch = OutputBranch;
     it.visitSwitch = OutputSwitch;
 
-    root->traverse(&it);
+    treeRoot->traverse(&it);
 }
 
 } // end namespace glslang

glslang/MachineIndependent/localintermediate.h

@@ -37,9 +37,10 @@
 
 #include "../Include/intermediate.h"
 #include "../Public/ShaderLang.h"
-#include "SymbolTable.h"
 #include "Versions.h"
 
+class TInfoSink;
+
 namespace glslang {
 
 struct TVectorFields {
@@ -47,14 +48,19 @@ struct TVectorFields {
     int num;
 };
 
+class TSymbolTable;
+class TVariable;
+
 //
 // Set of helper functions to help parse and build the tree.
 //
 class TIntermediate {
 public:
-    POOL_ALLOCATOR_NEW_DELETE(GetThreadPoolAllocator())
+    TIntermediate(int v, EProfile p) : treeRoot(0), profile(p), version(v) { }
+
+    void setTreeRoot(TIntermNode* r) { treeRoot = r; }
+    TIntermNode* getTreeRoot() const { return treeRoot; }
     
-    TIntermediate(int v, EProfile p) : version(v), profile(p) { }
     TIntermSymbol* addSymbol(int Id, const TString&, const TType&, TSourceLoc);
     TIntermTyped* addConversion(TOperator, const TType&, TIntermTyped*);
     TIntermTyped* addBinaryMath(TOperator, TIntermTyped* left, TIntermTyped* right, TSourceLoc);
@@ -86,10 +92,12 @@ public:
     void addSymbolLinkageNodes(TIntermNode* root, TIntermAggregate*& linkage, EShLanguage, TSymbolTable&);
     void addSymbolLinkageNode(TIntermAggregate*& linkage, TSymbolTable&, const TString&);
     void addSymbolLinkageNode(TIntermAggregate*& linkage, const TVariable&);
-	void remove(TIntermNode*);
-    void outputTree(TIntermNode*, TInfoSink&);
+
+    void outputTree(TInfoSink& infoSink);
+	void removeTree();
 
 protected:
+    TIntermNode* treeRoot;
     EProfile profile;
     int version;