JIT: Don't try to do hot/cold splitting unless optimizing (#106515)

Author: amanasifkhalid

src/coreclr/jit/compiler.cpp

@@ -5255,11 +5255,11 @@ void Compiler::compCompile(void** methodCodePtr, uint32_t* methodCodeSize, JitFl
         // Conditional to Switch conversion
         //
         DoPhase(this, PHASE_SWITCH_RECOGNITION, &Compiler::optSwitchRecognition);
-    }
 
-    // Determine start of cold region if we are hot/cold splitting
-    //
-    DoPhase(this, PHASE_DETERMINE_FIRST_COLD_BLOCK, &Compiler::fgDetermineFirstColdBlock);
+        // Determine start of cold region if we are hot/cold splitting
+        //
+        DoPhase(this, PHASE_DETERMINE_FIRST_COLD_BLOCK, &Compiler::fgDetermineFirstColdBlock);
+    }
 
 #ifdef DEBUG
     // Stash the current estimate of the function's size if necessary.