Add codegen support for stack address intrinsics.

llvm-svn: 51309

2 files changed, 24 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index e29a1742293..a43649dc4bd 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -262,6 +262,14 @@ RValue CodeGenFunction::EmitBuiltinExpr(unsigned BuiltinID, const CallExpr *E) {
     Builder.CreateCall(CGM.getMemCpyFn(), MemCpyOps, MemCpyOps+4);
     return RValue::get(MemCpyOps[0]);
   }
+  case Builtin::BI__builtin_return_address: {
+    Value *F = CGM.getIntrinsic(Intrinsic::returnaddress, 0, 0);
+    return RValue::get(Builder.CreateCall(F, EmitScalarExpr(E->getArg(0))));
+  }
+  case Builtin::BI__builtin_frame_address: {
+    Value *F = CGM.getIntrinsic(Intrinsic::frameaddress, 0, 0);
+    return RValue::get(Builder.CreateCall(F, EmitScalarExpr(E->getArg(0))));
+  }
   case Builtin::BI__sync_fetch_and_add:
     return EmitBinaryAtomic(*this, Intrinsic::atomic_las, E);
   case Builtin::BI__sync_fetch_and_sub:
diff --git a/clang/test/CodeGen/builtin-stackaddress.c b/clang/test/CodeGen/builtin-stackaddress.c
new file mode 100644
index 00000000000..2b9c7996613
--- /dev/null
+++ b/clang/test/CodeGen/builtin-stackaddress.c
@@ -0,0 +1,16 @@
+// RUN: clang -emit-llvm < %s
+void* a(unsigned x) {
+return __builtin_return_address(0);
+}
+
+void* c(unsigned x) {
+return __builtin_frame_address(0);
+}
+// RUN: clang -emit-llvm < %s
+void* a(unsigned x) {
+return __builtin_return_address(0);
+}
+
+void* c(unsigned x) {
+return __builtin_frame_address(0);
+}