# HG changeset patch
# User Shinji KONO <kono@ie.u-ryukyu.ac.jp>
# Date 1697099944 -32400
# Node ID c4af3c7f699ee872dc2682de824fbb903ac8663b
# Parent  011663b4a8081cc475ff1585745a1be29aaafbe5
avoid struct copy in aarch64 / code gear

diff -r 011663b4a808 -r c4af3c7f699e clang/lib/CodeGen/CGCall.cpp
--- a/clang/lib/CodeGen/CGCall.cpp	Thu Oct 12 15:52:37 2023 +0900
+++ b/clang/lib/CodeGen/CGCall.cpp	Thu Oct 12 17:39:04 2023 +0900
@@ -5163,6 +5163,11 @@
           }
         }
 
+#ifndef noCbC
+        if (this->FnRetTy.getTypePtr()->is__CodeType() && CallInfo.getReturnType().getTypePtr()->is__CodeType()) {
+            NeedCopy = false;
+        }
+#endif
         if (NeedCopy) {
           // Create an aligned temporary, and copy to it.
           Address AI = CreateMemTempWithoutCast(
@@ -5615,10 +5620,11 @@
     else if (IsMustTail)
       Call->setTailCallKind(llvm::CallInst::TCK_MustTail);
 #ifndef noCbC
-    if (! CallInfo.isVariadic() && ! IsMustTail) {
-      if (this->FnRetTy.getTypePtr()->is__CodeType() && CallInfo.getReturnType().getTypePtr()->is__CodeType())
-          Call->setTailCallKind(llvm::CallInst::TCK_Tail);
-    }
+  if (this->FnRetTy.getTypePtr()->is__CodeType() && CallInfo.getReturnType().getTypePtr()->is__CodeType()) {
+     Call->setTailCallKind(llvm::CallInst::TCK_Tail);
+     IsMustTail = true;
+     CI->setDoesNotReturn();
+  }
 #endif
   }