[swift-ide-test] Add solver limit options

Allow configuring the solver limits for `swift-ide-test`.

Author: hamishknight

tools/swift-ide-test/swift-ide-test.cpp

@@ -774,6 +774,21 @@ static llvm::cl::opt<bool> DebugConstraintSolver("debug-constraints",
     llvm::cl::desc("Enable verbose debugging from the constraint solver."),
     llvm::cl::cat(Category));
 
+static llvm::cl::opt<unsigned>
+SolverMemoryThreshold("solver-memory-threshold",
+    llvm::cl::desc("Set the memory threshold for constraint solving."),
+    llvm::cl::cat(Category), llvm::cl::init(0));
+
+static llvm::cl::opt<unsigned>
+SolverScopeThreshold("solver-scope-threshold",
+    llvm::cl::desc("Set the solver scope threshold for constraint solving."),
+    llvm::cl::cat(Category), llvm::cl::init(0));
+
+static llvm::cl::opt<unsigned>
+SolverTrailThreshold("solver-trail-threshold",
+    llvm::cl::desc("Set the solver trail threshold for constraint solving."),
+    llvm::cl::cat(Category), llvm::cl::init(0));
+
 static llvm::cl::opt<bool>
 IncludeLocals("include-locals", llvm::cl::desc("Index local symbols too."),
               llvm::cl::cat(Category), llvm::cl::init(false));
@@ -4556,12 +4571,19 @@ int main(int argc, char *argv[]) {
   }
   InitInvok.getLangOptions().EnableObjCAttrRequiresFoundation =
     !options::DisableObjCAttrRequiresFoundationModule;
-  for (auto prefix : options::DebugForbidTypecheckPrefix) {
-    InitInvok.getTypeCheckerOptions().DebugForbidTypecheckPrefixes.push_back(
-        prefix);
-  }
-  InitInvok.getTypeCheckerOptions().DebugConstraintSolver =
-      options::DebugConstraintSolver;
+
+  auto &TypeCheckOpts = InitInvok.getTypeCheckerOptions();
+  for (auto prefix : options::DebugForbidTypecheckPrefix)
+    TypeCheckOpts.DebugForbidTypecheckPrefixes.push_back(prefix);
+
+  TypeCheckOpts.DebugConstraintSolver = options::DebugConstraintSolver;
+
+  if (auto &memLimit = options::SolverMemoryThreshold)
+    TypeCheckOpts.SolverMemoryThreshold = memLimit;
+  if (auto &scopeLimit = options::SolverScopeThreshold)
+    TypeCheckOpts.SolverScopeThreshold = scopeLimit;
+  if (auto &trailLimit = options::SolverTrailThreshold)
+    TypeCheckOpts.SolverTrailThreshold = trailLimit;
 
   for (auto ConfigName : options::BuildConfigs)
     InitInvok.getLangOptions().addCustomConditionalCompilationFlag(ConfigName);