Add more information to backtraces from the LoadableByAddress pass

Should not change functionality outside of displaying more information in backtraces.

Author: aschwaighofer

lib/IRGen/LoadableByAddress.cpp

@@ -1914,6 +1914,8 @@ static void allocateAndSetAll(StructLoweringState &pass,
  LoadableStorageAllocation &allocator,
  SILInstruction *user,
  MutableArrayRef<Operand> operands) {
+ PrettyStackTraceSILNode backtrace("Running allocateAndSetAll on ", user);
+
  for (Operand &operand : operands) {
  SILValue value = operand.get();
  SILType silType = value->getType();
@@ -2424,6 +2426,8 @@ static bool rewriteFunctionReturn(StructLoweringState &pass) {
 }
 
 void LoadableByAddress::runOnFunction(SILFunction *F) {
+ PrettyStackTraceSILFunction backtrace("Running LoadableByAddress on ", F);
+
  CanSILFunctionType funcType = F->getLoweredFunctionType();
  IRGenModule *currIRMod = getIRGenModule()->IRGen.getGenModule(F);