Expose hasOnlyEndOfScopeOrDestroyUses as a utility

for cross-file use.

Author: atrick

include/swift/SILOptimizer/Utils/InstOptUtils.h

@@ -68,6 +68,10 @@ NullablePtr<SILInstruction> createDecrementBefore(SILValue ptr,
 /// Get the insertion point after \p val.
 Optional<SILBasicBlock::iterator> getInsertAfterPoint(SILValue val);
 
+/// True if this instruction's only uses are debug_value (in -O mode),
+/// destroy_value, or end-of-scope instruction such as end_borrow.
+bool hasOnlyEndOfScopeOrDestroyUses(SILInstruction *inst);
+
 /// Return the number of @inout arguments passed to the given apply site.
 unsigned getNumInOutArguments(FullApplySite applySite);
 

lib/SILOptimizer/Utils/InstOptUtils.cpp

@@ -211,7 +211,7 @@ bool swift::isIntermediateRelease(SILInstruction *inst,
   return false;
 }
 
-static bool hasOnlyEndOfScopeOrDestroyUses(SILInstruction *inst) {
+bool swift::hasOnlyEndOfScopeOrDestroyUses(SILInstruction *inst) {
   for (SILValue result : inst->getResults()) {
     for (Operand *use : result->getUses()) {
       SILInstruction *user = use->getUser();