IR: Adds Option to run the IRDumper with more configurations

This is incredibly useful and I find myself hacking this feature in
every time I am optimizing IR. Adds a new configuration option which
allows dumping IR at various times.

Before any optimization passes has happened
After all optimizations passes have happened
Before and After each IRPass to see what is breaking something.

Needs #2864 merged first

External/FEXCore/Source/Interface/IR/PassManager.cpp

@@ -17,6 +17,54 @@ $end_info$
 namespace FEXCore::IR {
 class IREmitter;
 
+void PassManager::Finalize() {
+  if (!PassManagerDumpIR()) {
+    // Not configured to dump any IR, just return.
+    return;
+  }
+
+  auto it = Passes.begin();
+  // Walk the passes and add them where asked.
+  if (PassManagerDumpIR() & FEXCore::Config::PassManagerDumpIR::BEFORE) {
+    // Insert at the start.
+    it = InsertAt(it, Debug::CreateIRDumper());
+    ++it; // Skip what we inserted.
+  }
+
+  if ((PassManagerDumpIR() & FEXCore::Config::PassManagerDumpIR::BEFOREOPT) ||
+      (PassManagerDumpIR() & FEXCore::Config::PassManagerDumpIR::AFTEROPT)) {
+
+    bool SkipFirstBefore = PassManagerDumpIR() & FEXCore::Config::PassManagerDumpIR::BEFORE;
+    for (; it != Passes.end();) {
+      if (PassManagerDumpIR() & FEXCore::Config::PassManagerDumpIR::BEFOREOPT) {
+        if (SkipFirstBefore) {
+          // If we need to skip the first one, then continue.
+          SkipFirstBefore = false;
+          ++it;
+          continue;
+        }
+
+        // Insert before
+        it = InsertAt(it, Debug::CreateIRDumper());
+        ++it; // Skip what we inserted.
+      }
+
+      ++it; // Skip current pass.
+      if (PassManagerDumpIR() & FEXCore::Config::PassManagerDumpIR::AFTEROPT) {
+        // Insert after
+        it = InsertAt(it, Debug::CreateIRDumper());
+        ++it; // Skip what we inserted.
+      }
+    }
+  }
+  if (PassManagerDumpIR() & FEXCore::Config::PassManagerDumpIR::AFTER) {
+    if (!(PassManagerDumpIR() & FEXCore::Config::PassManagerDumpIR::AFTEROPT)) {
+      // Insert final IRDumper.
+      it = InsertAt(it, Debug::CreateIRDumper());
+    }
+  }
+}
+
 void PassManager::AddDefaultPasses(FEXCore::Context::ContextImpl *ctx, bool InlineConstants, bool StaticRegisterAllocation) {
   FEX_CONFIG_OPT(DisablePasses, O0);