SILOptimizer: extract predictable access and dead alloc optimizations into stand-alone utility functions

Author: eeckstein

include/swift/SILOptimizer/Utils/InstOptUtils.h

@@ -719,6 +719,16 @@ bool tryEliminateOnlyOwnershipUsedForwardingInst(
 IntegerLiteralInst *optimizeBuiltinCanBeObjCClass(BuiltinInst *bi,
                                                   SILBuilder &builder);
 
+/// Performs "predictable" memory access optimizations.
+///
+/// See the PredictableMemoryAccessOptimizations pass.
+bool optimizeMemoryAccesses(SILFunction &fn);
+
+/// Performs "predictable" dead allocation optimizations.
+///
+/// See the PredictableDeadAllocationElimination pass.
+bool eliminateDeadAllocations(SILFunction &fn);
+
 } // end namespace swift
 
 #endif

lib/SILOptimizer/Mandatory/PredictableMemOpt.cpp

@@ -2846,7 +2846,7 @@ static AllocationInst *getOptimizableAllocation(SILInstruction *i) {
   return alloc;
 }
 
-static bool optimizeMemoryAccesses(SILFunction &fn) {
+bool swift::optimizeMemoryAccesses(SILFunction &fn) {
   bool changed = false;
   DeadEndBlocks deadEndBlocks(&fn);
 
@@ -2887,7 +2887,7 @@ static bool optimizeMemoryAccesses(SILFunction &fn) {
   return changed;
 }
 
-static bool eliminateDeadAllocations(SILFunction &fn) {
+bool swift::eliminateDeadAllocations(SILFunction &fn) {
   bool changed = false;
   DeadEndBlocks deadEndBlocks(&fn);