Add Expr::EvaluateAsLValue which will (believe it or not) try to evaluate an Expr as an LValue.
llvm-svn: 68763
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@ -229,6 +229,9 @@ public:
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/// must be called on an expression that constant folds to an integer.
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/// must be called on an expression that constant folds to an integer.
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llvm::APSInt EvaluateAsInt(ASTContext &Ctx) const;
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llvm::APSInt EvaluateAsInt(ASTContext &Ctx) const;
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/// EvaluateAsLValue - Evaluate an expression to see if it's a valid LValue.
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bool EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const;
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/// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an
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/// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an
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/// integer constant expression with the value zero, or if this is one that is
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/// integer constant expression with the value zero, or if this is one that is
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/// cast to void*.
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/// cast to void*.
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@ -1651,6 +1651,12 @@ bool Expr::Evaluate(EvalResult &Result, ASTContext &Ctx) const {
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return true;
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return true;
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}
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}
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bool Expr::EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const {
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EvalInfo Info(Ctx, Result);
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return EvaluateLValue(this, Result.Val, Info) && !Result.HasSideEffects;
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}
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/// isEvaluatable - Call Evaluate to see if this expression can be constant
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/// isEvaluatable - Call Evaluate to see if this expression can be constant
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/// folded, but discard the result.
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/// folded, but discard the result.
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bool Expr::isEvaluatable(ASTContext &Ctx) const {
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bool Expr::isEvaluatable(ASTContext &Ctx) const {
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