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Allow to mutate the type of MLIR Value in-place 

This avoid trashing memory by cloning and replaceAllUseswith when
performing type inference.

PiperOrigin-RevId: 240631137
This commit is contained in:
Mehdi Amini 2019-03-27 13:38:48 -07:00 committed by jpienaar
parent b0244b66a5
commit 7641900d2f
1 changed files with 9 additions and 1 deletions
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10
mlir/include/mlir/IR/Value.h
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@ -52,6 +52,14 @@ public:
Type getType() { return typeAndKind.getPointer(); }
/// Mutate the type of this Value to be of the specified type.
///
/// Note that this is an extremely dangerous operation which can create
/// completely invalid IR very easily. It is strongly recommended that you
/// recreate IR objects with the right types instead of mutating them in
/// place.
void setType(Type newType) { typeAndKind.setPointer(newType); }
/// Replace all uses of 'this' value with the new value, updating anything in
/// the IR that uses 'this' to use the other value instead. When this returns
/// there are zero uses of 'this'.
@ -82,7 +90,7 @@ protected:
Value(Kind kind, Type type) : typeAndKind(type, kind) {}
private:
const llvm::PointerIntPair<Type, 1, Kind> typeAndKind;
llvm::PointerIntPair<Type, 1, Kind> typeAndKind;
};
inline raw_ostream &operator<<(raw_ostream &os, Value &value) {