[sil] Split operand ownership classification from SILOwnershipVerifier.cpp into OperandOwnership.cpp.

Last week I split out operand ownership classification from the
SILOwnershipVerifier into the OperandOwnershipKindClassifier. Now move that
classifier code to another file so that SILOwnershipVerifier.cpp just consists
of the actual checker code. This makes sense since this type of classifier is
describing a separate structural aspect of SIL rather than something intrinsic
to the ownership verifier.

Keep in mind that this is not the final form of this classifier. Just an
incremental step forward.

Author: gottesmm

include/swift/SIL/OwnershipUtils.h

@@ -14,6 +14,7 @@
 #define SWIFT_SIL_OWNERSHIPUTILS_H
 
 #include "swift/Basic/LLVM.h"
+#include "swift/SIL/SILValue.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
 
@@ -101,6 +102,22 @@ bool valueHasLinearLifetime(SILValue value,
                             DeadEndBlocks &deadEndBlocks,
                             ownership::ErrorBehaviorKind errorBehavior);
 
+/// Returns true if v is an address or trivial.
+bool isValueAddressOrTrivial(SILValue v, SILModule &m);
+
+/// These operations forward both owned and guaranteed ownership.
+bool isOwnershipForwardingValueKind(SILNodeKind kind);
+
+/// These operations forward guaranteed ownership, but don't necessarily forward
+/// owned values.
+bool isGuaranteedForwardingValueKind(SILNodeKind kind);
+
+bool isGuaranteedForwardingValue(SILValue value);
+
+bool isGuaranteedForwardingInst(SILInstruction *i);
+
+bool isOwnershipForwardingInst(SILInstruction *i);
+
 } // namespace swift
 
 #endif

lib/SIL/CMakeLists.txt

@@ -11,7 +11,9 @@ add_swift_library(swiftSIL STATIC
   LinearLifetimeChecker.cpp
   LoopInfo.cpp
   Notifications.cpp
+  OperandOwnership.cpp
   OptimizationRemark.cpp
+  OwnershipUtils.cpp
   PrettyStackTrace.cpp
   Projection.cpp
   SIL.cpp