X87: [turbofan] Fewer gap moves for tail calls.

src/compiler/x87/code-generator-x87.cc

Index: src/compiler/x87/code-generator-x87.cc
diff --git a/src/compiler/x87/code-generator-x87.cc b/src/compiler/x87/code-generator-x87.cc
index 6ac3ec16c567f2ac00efcaa49ce947451558fd5c..343dc3a619ec040a93415f78eace826e496f54de 100644
--- a/src/compiler/x87/code-generator-x87.cc
+++ b/src/compiler/x87/code-generator-x87.cc
@@ -341,9 +341,6 @@ void CodeGenerator::AssembleDeconstructActivationRecord(int stack_param_delta) {
   if (sp_slot_delta > 0) {
     __ add(esp, Immediate(sp_slot_delta * kPointerSize));
   }
-  if (frame()->needs_frame()) {
-    __ pop(ebp);
-  }
   frame_access_state()->SetFrameAccessToDefault();
 }
 
@@ -354,6 +351,9 @@ void CodeGenerator::AssemblePrepareTailCall(int stack_param_delta) {
     __ sub(esp, Immediate(-sp_slot_delta * kPointerSize));
     frame_access_state()->IncreaseSPDelta(-sp_slot_delta);
   }
+  if (frame()->needs_frame()) {
+    __ mov(ebp, MemOperand(ebp, 0));
+  }
   frame_access_state()->SetFrameAccessToSP();
 }