Use branch instead of tailcall for recursive calls (#2282)

* Use branch instead of tailcall for recursive calls

Use a branch instead of doing a tailcall for recursive calls. This
avoids having to store the dispatch address, setting up the epilogue and
keeps guest registers in host registers for longer.

The rejit check is moved down into the entry block so that the rejit
behaviour remains the same as before.

* Set PTC version

Co-authored-by: gdkchan <gab.dark.100@gmail.com>

1 files changed, 13 insertions, 9 deletions

diff --git a/ARMeilleure/Translation/Translator.cs b/ARMeilleure/Translation/Translator.cs
index 81af0681..f8b074c9 100644
--- a/ARMeilleure/Translation/Translator.cs
+++ b/ARMeilleure/Translation/Translator.cs
@@ -237,13 +237,6 @@ namespace ARMeilleure.Translation
 
             Logger.StartPass(PassName.Translation);
 
-            Counter<uint> counter = null;
-
-            if (!context.HighCq)
-            {
-                EmitRejitCheck(context, out counter);
-            }
-
             EmitSynchronization(context);
 
             if (blocks[0].Address != address)
@@ -251,7 +244,7 @@ namespace ARMeilleure.Translation
                 context.Branch(context.GetLabel(address));
             }
 
-            ControlFlowGraph cfg = EmitAndGetCFG(context, blocks, out Range funcRange);
+            ControlFlowGraph cfg = EmitAndGetCFG(context, blocks, out Range funcRange, out Counter<uint> counter);
 
             ulong funcSize = funcRange.End - funcRange.Start;
 
@@ -322,8 +315,14 @@ namespace ARMeilleure.Translation
             }
         }
 
-        private static ControlFlowGraph EmitAndGetCFG(ArmEmitterContext context, Block[] blocks, out Range range)
+        private static ControlFlowGraph EmitAndGetCFG(
+            ArmEmitterContext context,
+            Block[] blocks,
+            out Range range,
+            out Counter<uint> counter)
         {
+            counter = null;
+
             ulong rangeStart = ulong.MaxValue;
             ulong rangeEnd = 0;
 
@@ -344,6 +343,11 @@ namespace ARMeilleure.Translation
                     }
                 }
 
+                if (block.Address == context.EntryAddress && !context.HighCq)
+                {
+                    EmitRejitCheck(context, out counter);
+                }
+
                 context.CurrBlock = block;
 
                 context.MarkLabel(context.GetLabel(block.Address));