[mono] Extend mono AOT compiler to ingest .mibc profiles (#70194)

* [mono] Add non_executable field to MonoImage to properly load MethodRef in .mibc files

* [mono][aot] Extend mono-aot-compiler to handle .mibc profile

* [tasks] Extend MonoAOTCompiler task to handle .mibc profiles

* Address feedback

* Add method descriptions

* Address more feedback

1 files changed, 26 insertions, 0 deletions

diff --git a/src/tasks/AotCompilerTask/MonoAOTCompiler.cs b/src/tasks/AotCompilerTask/MonoAOTCompiler.cs
index 66cf3ec06e8..fcc24b6111b 100644
--- a/src/tasks/AotCompilerTask/MonoAOTCompiler.cs
+++ b/src/tasks/AotCompilerTask/MonoAOTCompiler.cs
@@ -117,6 +117,11 @@ public class MonoAOTCompiler : Microsoft.Build.Utilities.Task
     public string[]? AotProfilePath { get; set; }
 
     /// <summary>
+    /// Mibc file to use for profile-guided optimization, *only* the methods described in the file will be AOT compiled.
+    /// </summary>
+    public string[]? MibcProfilePath { get; set; }
+
+    /// <summary>
     /// List of profilers to use.
     /// </summary>
     public string[]? Profilers { get; set; }
@@ -278,6 +283,18 @@ public class MonoAOTCompiler : Microsoft.Build.Utilities.Task
             }
         }
 
+        if (MibcProfilePath != null)
+        {
+            foreach (var path in MibcProfilePath)
+            {
+                if (!File.Exists(path))
+                {
+                    Log.LogError($"MibcProfilePath '{path}' doesn't exist.");
+                    return false;
+                }
+            }
+        }
+
         if (UseLLVM)
         {
             if (string.IsNullOrEmpty(LLVMPath))
@@ -739,6 +756,15 @@ public class MonoAOTCompiler : Microsoft.Build.Utilities.Task
             }
         }
 
+        if (MibcProfilePath?.Length > 0)
+        {
+            aotArgs.Add("profile-only");
+            foreach (var path in MibcProfilePath)
+            {
+                aotArgs.Add($"mibc-profile={path}");
+            }
+        }
+
         if (!string.IsNullOrEmpty(AotArguments))
         {
             aotArgs.Add(AotArguments);