[PATCH] D11476: Marked call instruction in thunk function with tail attribute when applicable

[Michael Kuperstein via cfe-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL244207: Mark calls in thunk functions as tail-call optimization candidates (authored by mkuper).

Changed prior to commit:
  http://reviews.llvm.org/D11476?vs=31341&id=31440#toc

Repository:
  rL LLVM

http://reviews.llvm.org/D11476

Files:
  cfe/trunk/lib/CodeGen/CGVTables.cpp
  cfe/trunk/test/CodeGenCXX/microsoft-abi-structors.cpp

Index: cfe/trunk/test/CodeGenCXX/microsoft-abi-structors.cpp
===================================================================
--- cfe/trunk/test/CodeGenCXX/microsoft-abi-structors.cpp
+++ cfe/trunk/test/CodeGenCXX/microsoft-abi-structors.cpp
@@ -176,7 +176,7 @@
 //      Do an adjustment from B* to C*.
 // DTORS2:   getelementptr i8, i8* %{{.*}}, i32 -4
 // DTORS2:   bitcast i8* %{{.*}} to %"struct.dtor_in_second_nvbase::C"*
-// DTORS2:   %[[CALL:.*]] = call x86_thiscallcc i8* @"\01??_GC at dtor_in_second_nvbase@@UAEPAXI at Z"
+// DTORS2:   %[[CALL:.*]] = tail call x86_thiscallcc i8* @"\01??_GC at dtor_in_second_nvbase@@UAEPAXI at Z"
 // DTORS2:   ret i8* %[[CALL]]
 
 }
Index: cfe/trunk/lib/CodeGen/CGVTables.cpp
===================================================================
--- cfe/trunk/lib/CodeGen/CGVTables.cpp
+++ cfe/trunk/lib/CodeGen/CGVTables.cpp
@@ -312,6 +312,8 @@
   // Consider return adjustment if we have ThunkInfo.
   if (Thunk && !Thunk->Return.isEmpty())
     RV = PerformReturnAdjustment(*this, ResultType, RV, *Thunk);
+  else if (llvm::CallInst* Call = dyn_cast<llvm::CallInst>(CallOrInvoke))
+    Call->setTailCallKind(llvm::CallInst::TCK_Tail);
 
   // Emit return.
   if (!ResultType->isVoidType() && Slot.isNull())


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