[AVX] Make Inits Foldable
Manage Inits in a FoldingSet. This provides several benefits:
- Memory for Inits is properly managed
- Duplicate Inits are folded into Flyweights, saving memory
- It enforces const-correctness, protecting against certain classes
of bugs
The above benefits allow Inits to be used in more contexts, which in
turn provides more dynamism to TableGen. This enhanced capability
will be used by the AVX code generator to a fold common patterns
together.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134907 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/SetTheory.h b/utils/TableGen/SetTheory.h
index e37a76e..e2309b2 100644
--- a/utils/TableGen/SetTheory.h
+++ b/utils/TableGen/SetTheory.h
@@ -70,7 +70,7 @@
/// apply - Apply this operator to Expr's arguments and insert the result
/// in Elts.
- virtual void apply(SetTheory&, DagInit *Expr, RecSet &Elts) =0;
+ virtual void apply(SetTheory&, const DagInit *Expr, RecSet &Elts) =0;
};
/// Expander - A callback function that can transform a Record representing a
@@ -115,7 +115,7 @@
void addOperator(StringRef Name, Operator*);
/// evaluate - Evaluate Expr and append the resulting set to Elts.
- void evaluate(Init *Expr, RecSet &Elts);
+ void evaluate(const Init *Expr, RecSet &Elts);
/// evaluate - Evaluate a sequence of Inits and append to Elts.
template<typename Iter>