[coroutines] Adding builtins for coroutine intrinsics and backendutil support.

Summary:
With this commit simple coroutines can be created in plain C using coroutine builtins.

Reviewers: rnk, EricWF, rsmith

Subscribers: modocache, mgorny, mehdi_amini, beanz, cfe-commits

Differential Revision: https://reviews.llvm.org/D24373

llvm-svn: 283155

1 files changed, 33 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index c272e80d5df..e9248b35cd6 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -2135,6 +2135,39 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
     break;
   }
 
+  case Builtin::BI__builtin_coro_size: {
+    auto & Context = getContext();
+    auto SizeTy = Context.getSizeType();
+    auto T = Builder.getIntNTy(Context.getTypeSize(SizeTy));
+    Value *F = CGM.getIntrinsic(Intrinsic::coro_size, T);
+    return RValue::get(Builder.CreateCall(F));
+  }
+
+  case Builtin::BI__builtin_coro_id:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_id);
+  case Builtin::BI__builtin_coro_promise:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_promise);
+  case Builtin::BI__builtin_coro_resume:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_resume);
+  case Builtin::BI__builtin_coro_frame:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_frame);
+  case Builtin::BI__builtin_coro_free:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_free);
+  case Builtin::BI__builtin_coro_destroy:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_destroy);
+  case Builtin::BI__builtin_coro_done:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_done);
+  case Builtin::BI__builtin_coro_alloc:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_alloc);
+  case Builtin::BI__builtin_coro_begin:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_begin);
+  case Builtin::BI__builtin_coro_end:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_end);
+  case Builtin::BI__builtin_coro_suspend:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_suspend);
+  case Builtin::BI__builtin_coro_param:
+    return EmitCoroutineIntrinsic(E, Intrinsic::coro_param);
+
   // OpenCL v2.0 s6.13.16.2, Built-in pipe read and write functions
   case Builtin::BIread_pipe:
   case Builtin::BIwrite_pipe: {