Add Operand::isConsuming().

Use this whenever we're assuming an owned value.

Author: atrick

include/swift/SIL/SILValue.h

@@ -1037,6 +1037,9 @@ class Operand {
   /// guaranteed scope.
   bool isLifetimeEnding() const;
 
+  /// Returns true if this ends the lifetime of an owned operand.
+  bool isConsuming() const;
+
   SILBasicBlock *getParentBlock() const;
   SILFunction *getParentFunction() const;
 

lib/SIL/IR/SILValue.cpp

@@ -339,6 +339,13 @@ bool Operand::isLifetimeEnding() const {
   return get().getOwnershipKind() != OwnershipKind::None;
 }
 
+bool Operand::isConsuming() const {
+  if (!getOwnershipConstraint().isConsuming())
+    return false;
+
+  return get().getOwnershipKind() != OwnershipKind::None;
+}
+
 //===----------------------------------------------------------------------===//
 //                             OperandConstraint
 //===----------------------------------------------------------------------===//