[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

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@283155 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 66 insertions, 0 deletions

diff --git a/test/CodeGenCoroutines/coro-builtins-err.c b/test/CodeGenCoroutines/coro-builtins-err.c
new file mode 100644
index 0000000000..dfd2542886
--- /dev/null
+++ b/test/CodeGenCoroutines/coro-builtins-err.c
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -triple x86_64-pc-windows-msvc18.0.0 -fcoroutines-ts -emit-llvm %s -o - -verify
+
+void f() {
+  __builtin_coro_alloc(); // expected-error {{this builtin expect that __builtin_coro_id}}
+  __builtin_coro_begin(0); // expected-error {{this builtin expect that __builtin_coro_id}}
+  __builtin_coro_free(0); // expected-error {{this builtin expect that __builtin_coro_id}}
+
+  __builtin_coro_id(32, 0, 0, 0);
+  __builtin_coro_id(32, 0, 0, 0); // expected-error {{only one __builtin_coro_id}}
+}
diff --git a/test/CodeGenCoroutines/coro-builtins.c b/test/CodeGenCoroutines/coro-builtins.c
new file mode 100644
index 0000000000..5c3e6c3a6b
--- /dev/null
+++ b/test/CodeGenCoroutines/coro-builtins.c
@@ -0,0 +1,56 @@
+// RUN: %clang_cc1 -triple x86_64-pc-windows-msvc18.0.0 -fcoroutines-ts -emit-llvm %s -o - -disable-llvm-passes | FileCheck %s
+
+void *myAlloc(long long);
+
+// CHECK-LABEL: f( 
+void f(int n) {
+  // CHECK: %n.addr = alloca i32
+  // CHECK: %n_copy = alloca i32
+  // CHECK: %promise = alloca i32
+  int n_copy;
+  int promise;
+
+  // CHECK: %[[PROM_ADDR:.+]] = bitcast i32* %promise to i8*
+  // CHECK-NEXT: %[[COROID:.+]] = call token @llvm.coro.id(i32 32, i8* %[[PROM_ADDR]], i8* null, i8* null)
+  __builtin_coro_id(32, &promise, 0, 0);
+
+  // CHECK-NEXT: call i1 @llvm.coro.alloc(token %[[COROID]])
+  __builtin_coro_alloc();
+
+  // CHECK-NEXT: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
+  // CHECK-NEXT: %[[MEM:.+]] = call i8* @myAlloc(i64 %[[SIZE]])
+  // CHECK-NEXT: %[[BEG:.+]] = call i8* @llvm.coro.begin(token %[[COROID]], i8* %[[MEM]])
+  __builtin_coro_begin(myAlloc(__builtin_coro_size()));
+
+  // CHECK-NEXT: %[[FRAME1:.+]] = call i8* @llvm.coro.frame() 
+  // CHECK-NEXT: call void @llvm.coro.resume(i8* %[[FRAME1]])
+  __builtin_coro_resume(__builtin_coro_frame());
+
+  // CHECK-NEXT: %[[FRAME2:.+]] = call i8* @llvm.coro.frame() 
+  // CHECK-NEXT: call void @llvm.coro.destroy(i8* %[[FRAME2]])
+  __builtin_coro_destroy(__builtin_coro_frame());
+
+  // CHECK-NEXT: %[[FRAME3:.+]] = call i8* @llvm.coro.frame() 
+  // CHECK-NEXT: call i1 @llvm.coro.done(i8* %[[FRAME3]])
+  __builtin_coro_done(__builtin_coro_frame());
+
+  // CHECK-NEXT: %[[FRAME4:.+]] = call i8* @llvm.coro.frame() 
+  // CHECK-NEXT: call i8* @llvm.coro.promise(i8* %[[FRAME4]], i32 48, i1 false)
+  __builtin_coro_promise(__builtin_coro_frame(), 48, 0);
+
+  // CHECK-NEXT: %[[FRAME5:.+]] = call i8* @llvm.coro.frame() 
+  // CHECK-NEXT: call i8* @llvm.coro.free(token %[[COROID]], i8* %[[FRAME5]])
+  __builtin_coro_free(__builtin_coro_frame());
+
+  // CHECK-NEXT: %[[FRAME6:.+]] = call i8* @llvm.coro.frame() 
+  // CHECK-NEXT: call void @llvm.coro.end(i8* %[[FRAME6]], i1 false)
+  __builtin_coro_end(__builtin_coro_frame(), 0);
+
+  // CHECK-NEXT: call i8 @llvm.coro.suspend(token none, i1 true)
+  __builtin_coro_suspend(1);
+
+  // CHECK-NEXT: %[[N_ADDR:.+]] = bitcast i32* %n.addr to i8*
+  // CHECK-NEXT: %[[N_COPY_ADDR:.+]] = bitcast i32* %n_copy to i8*
+  // CHECK-NEXT: call i1 @llvm.coro.param(i8* %[[N_ADDR]], i8* %[[N_COPY_ADDR]])
+  __builtin_coro_param(&n, &n_copy);
+}