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Add switch/case/default statements, using a switch node that contains a sequence of case/default nodes and top-level nodes of the code chunks in between them.

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git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@21131 e7fa87d3-cd2b-0410-9028-fcbf551c1848
This commit is contained in:
John Kessenich 2013-04-12 03:57:02 +00:00
parent 8e5425745f
commit 0576126005
10 changed files with 244 additions and 23 deletions
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32
glslang/Include/intermediate.h
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@ -217,6 +217,8 @@ enum TOperator {
EOpReturn,
EOpBreak,
EOpContinue,
EOpCase,
EOpDefault,
//
// Constructors
@ -297,6 +299,8 @@ class TIntermUnary;
class TIntermBinary;
class TIntermConstantUnion;
class TIntermSelection;
class TIntermSwitch;
class TIntermBranch;
class TIntermTyped;
class TIntermMethod;
class TIntermSymbol;
@ -319,8 +323,10 @@ public:
virtual TIntermUnary* getAsUnaryNode() { return 0; }
virtual TIntermBinary* getAsBinaryNode() { return 0; }
virtual TIntermSelection* getAsSelectionNode() { return 0; }
virtual TIntermSwitch* getAsSwitchNode() { return 0; }
virtual TIntermMethod* getAsMethodNode() { return 0; }
virtual TIntermSymbol* getAsSymbolNode() { return 0; }
virtual TIntermBranch* getAsBranchNode() { return 0; }
virtual ~TIntermNode() { }
protected:
TSourceLoc line;
@ -383,19 +389,20 @@ protected:
};
//
// Handle break, continue, return, and kill.
// Handle case, break, continue, return, and kill.
//
class TIntermBranch : public TIntermNode {
public:
TIntermBranch(TOperator op, TIntermTyped* e) :
flowOp(op),
expression(e) { }
virtual TIntermBranch* getAsBranchNode() { return this; }
virtual void traverse(TIntermTraverser*);
TOperator getFlowOp() { return flowOp; }
TIntermTyped* getExpression() { return expression; }
protected:
TOperator flowOp;
TIntermTyped* expression; // non-zero except for "return exp;" statements
TIntermTyped* expression;
};
//
@ -534,7 +541,7 @@ protected:
};
//
// For if tests. Simplified since there is no switch statement.
// For if tests.
//
class TIntermSelection : public TIntermTyped {
public:
@ -553,6 +560,24 @@ protected:
TIntermNode* falseBlock;
};
//
// For switch statements. Designed use is that a switch will have sequence of nodes
// that are either case/default nodes or a *single* node that represents all the code
// in between (if any) consecutive case/defaults. So, a traversal need only deal with
// 0 or 1 nodes per case/default statement.
//
class TIntermSwitch : public TIntermAggregate {
public:
TIntermSwitch(TIntermTyped* cond, TIntermAggregate* b) : condition(cond), body(b) { }
virtual void traverse(TIntermTraverser*);
virtual TIntermNode* getCondition() const { return condition; }
virtual TIntermAggregate* getBody() const { return body; }
virtual TIntermSwitch* getAsSwitchNode() { return this; }
protected:
TIntermTyped* condition;
TIntermAggregate* body;
};
//
// For traversing the tree. User should derive from this,
// put their traversal specific data in it, and then pass
@ -587,6 +612,7 @@ public:
bool (*visitAggregate)(bool preVisit, TIntermAggregate*, TIntermTraverser*);
bool (*visitLoop)(bool preVisit, TIntermLoop*, TIntermTraverser*);
bool (*visitBranch)(bool preVisit, TIntermBranch*, TIntermTraverser*);
bool (*visitSwitch)(bool preVisit, TIntermSwitch*, TIntermTraverser*);
int depth;
bool preVisit;