PR4134: Implement __builtin_extract_return_addr.

llvm-svn: 70794

3 files changed, 6 insertions, 1 deletions

diff --git a/clang/include/clang/AST/Builtins.def b/clang/include/clang/AST/Builtins.def
index c51ba69b8cf..a14c9d85b0c 100644
--- a/clang/include/clang/AST/Builtins.def
+++ b/clang/include/clang/AST/Builtins.def
@@ -162,6 +162,7 @@ BUILTIN(__builtin_strrchr, "c*cC*i", "nF")
 BUILTIN(__builtin_strspn, "zcC*cC*", "nF")
 BUILTIN(__builtin_strstr, "c*cC*cC*", "nF")
 BUILTIN(__builtin_return_address, "v*Ui", "n")
+BUILTIN(__builtin_extract_return_addr, "v*v*", "n")
 BUILTIN(__builtin_frame_address, "v*Ui", "n")
 BUILTIN(__builtin_flt_rounds, "i", "nc")
 BUILTIN(__builtin_setjmp, "iv**", "")
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 2b9a17845d6..d14bb53e6f4 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -310,7 +310,10 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
     Value *F = CGM.getIntrinsic(Intrinsic::frameaddress, 0, 0);
     return RValue::get(Builder.CreateCall(F, EmitScalarExpr(E->getArg(0))));
   }
-
+  case Builtin::BI__builtin_extract_return_addr: {
+    // FIXME: There should be a target hook for this
+    return RValue::get(EmitScalarExpr(E->getArg(0)));
+  }
   case Builtin::BI__sync_fetch_and_add:
     return EmitBinaryAtomic(*this, Intrinsic::atomic_load_add, E);
   case Builtin::BI__sync_fetch_and_sub:
diff --git a/clang/test/CodeGen/builtins.c b/clang/test/CodeGen/builtins.c
index 8735cc613b5..ce5cd74bd4c 100644
--- a/clang/test/CodeGen/builtins.c
+++ b/clang/test/CodeGen/builtins.c
@@ -109,6 +109,7 @@ int main() {
   // FIXME
   // V(clear_cache, (&N, &N+1));
   V(trap, ());
+  P(extract_return_addr, (&N));
 
   return 0;
 }