From: Eli Friedman <eli.friedman@gmail.com>
Date: Tue, 20 May 2008 08:59:34 +0000 (+0000)
Subject: Add codegen support for stack address intrinsics.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=256f77e431bc6b920ec94cf0bb4ad339ca21b8c9;p=clang

Add codegen support for stack address intrinsics.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51309 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index e29a174229..a43649dc4b 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/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/test/CodeGen/builtin-stackaddress.c b/test/CodeGen/builtin-stackaddress.c
new file mode 100644
index 0000000000..2b9c799661
--- /dev/null
+++ b/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);
+}