Create llvm.addressofreturnaddress intrinsic

Summary: We need a new LLVM intrinsic to implement MS _AddressOfReturnAddress builtin on 64-bit Windows.

Reviewers: majnemer, rnk

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D25293

llvm-svn: 284061

2 files changed, 2 insertions, 1 deletions

diff --git a/llvm/include/llvm/CodeGen/ISDOpcodes.h b/llvm/include/llvm/CodeGen/ISDOpcodes.h
index e7a9ced2509..420b03ec02b 100644
--- a/llvm/include/llvm/CodeGen/ISDOpcodes.h
+++ b/llvm/include/llvm/CodeGen/ISDOpcodes.h
@@ -70,7 +70,7 @@ namespace ISD {
     /// of the frame or return address to return.  An index of zero corresponds
     /// to the current function's frame or return address, an index of one to
     /// the parent's frame or return address, and so on.
-    FRAMEADDR, RETURNADDR,
+    FRAMEADDR, RETURNADDR, ADDROFRETURNADDR,
 
     /// LOCAL_RECOVER - Represents the llvm.localrecover intrinsic.
     /// Materializes the offset from the local object pointer of another
diff --git a/llvm/include/llvm/IR/Intrinsics.td b/llvm/include/llvm/IR/Intrinsics.td
index 306b4f8fca5..be0ae3ebad3 100644
--- a/llvm/include/llvm/IR/Intrinsics.td
+++ b/llvm/include/llvm/IR/Intrinsics.td
@@ -290,6 +290,7 @@ def int_gcwrite : Intrinsic<[],
 //===--------------------- Code Generator Intrinsics ----------------------===//
 //
 def int_returnaddress : Intrinsic<[llvm_ptr_ty], [llvm_i32_ty], [IntrNoMem]>;
+def int_addressofreturnaddress : Intrinsic<[llvm_ptr_ty], [], [IntrNoMem]>;
 def int_frameaddress  : Intrinsic<[llvm_ptr_ty], [llvm_i32_ty], [IntrNoMem]>;
 def int_read_register  : Intrinsic<[llvm_anyint_ty], [llvm_metadata_ty],
                                    [IntrReadMem], "llvm.read_register">;