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Prioritize Ternary Folding #268

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Prioritize Ternary Folding #268

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11 changes: 6 additions & 5 deletions liquidjava-verifier/src/main/java/liquidjava/rj_language/opt/VCFolding.java
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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,12 @@ private Expression foldUnary(UnaryExpression unary) {
*/
private Expression foldIte(Ite ite) {
Expression condition = ite.getCondition();

// true ? x : y -> x
// false ? x : y -> y
if (condition instanceof LiteralBoolean literal)
return literal.isBooleanTrue() ? ite.getThen().clone() : ite.getElse().clone();

Expression foldedCondition = fold(condition);
if (!condition.equals(foldedCondition))
return new Ite(foldedCondition, ite.getThen().clone(), ite.getElse().clone());
Expand All @@ -108,11 +114,6 @@ private Expression foldIte(Ite ite) {
if (!elseExpression.equals(foldedElse))
return new Ite(condition.clone(), thenExpression.clone(), foldedElse);

// true ? x : y -> x
// false ? x : y -> y
if (condition instanceof LiteralBoolean literal)
return literal.isBooleanTrue() ? thenExpression : elseExpression;

// y ? x : x -> x
if (thenExpression.equals(elseExpression))
return thenExpression;
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