3 files changed, 114 insertions, 1 deletions
diff --git a/llvm/test/Transforms/Coroutines/ex0.ll b/llvm/test/Transforms/Coroutines/ex0.ll
new file mode 100644
index 00000000000..7052d2142af
--- /dev/null
+++ b/llvm/test/Transforms/Coroutines/ex0.ll
@@ -0,0 +1,59 @@
+; First example from Doc/Coroutines.rst (two block loop)
+; RUN: opt < %s -enable-coroutines -O2 -S | FileCheck %s
+
+define i8* @f(i32 %n) {
+entry:
+  %id = call token @llvm.coro.id(i32 0, i8* null, i8* null)
+  %size = call i32 @llvm.coro.size.i32()
+  %alloc = call i8* @malloc(i32 %size)
+  %hdl = call i8* @llvm.coro.begin(token %id, i8* %alloc)
+  br label %loop
+
+loop:
+  %n.val = phi i32 [ %n, %entry ], [ %inc, %resume ]
+  call void @print(i32 %n.val)
+  %0 = call i8 @llvm.coro.suspend(token none, i1 false)
+  switch i8 %0, label %suspend [i8 0, label %resume 
+                                i8 1, label %cleanup]
+resume:
+  %inc = add i32 %n.val, 1
+  br label %loop
+
+cleanup:
+  %mem = call i8* @llvm.coro.free(i8* %hdl)
+  call void @free(i8* %mem)
+  br label %suspend
+suspend:
+  call void @llvm.coro.end(i8* %hdl, i1 0)  
+  ret i8* %hdl
+}
+
+; CHECK-LABEL: @main(
+define i32 @main() {
+entry:
+  %hdl = call i8* @f(i32 4)
+  call void @llvm.coro.resume(i8* %hdl)
+  call void @llvm.coro.resume(i8* %hdl)
+  call void @llvm.coro.destroy(i8* %hdl)
+  ret i32 0
+; CHECK: entry:
+; CHECK:      call void @print(i32 4)
+; CHECK:      call void @print(i32 5)
+; CHECK:      call void @print(i32 6)
+; CHECK:      ret i32 0
+}
+
+declare token @llvm.coro.id(i32, i8*, i8*)
+declare i8* @llvm.coro.alloc(token)
+declare i8* @llvm.coro.free(i8*)
+declare i32 @llvm.coro.size.i32()
+declare i8  @llvm.coro.suspend(token, i1)
+declare void @llvm.coro.resume(i8*)
+declare void @llvm.coro.destroy(i8*)
+  
+declare i8* @llvm.coro.begin(token, i8*)
+declare void @llvm.coro.end(i8*, i1) 
+
+declare noalias i8* @malloc(i32)
+declare void @print(i32)
+declare void @free(i8*)
diff --git a/llvm/test/Transforms/Coroutines/ex1.ll b/llvm/test/Transforms/Coroutines/ex1.ll
new file mode 100644
index 00000000000..942dbe558a3
--- /dev/null
+++ b/llvm/test/Transforms/Coroutines/ex1.ll
@@ -0,0 +1,54 @@
+; First example from Doc/Coroutines.rst (one block loop)
+; RUN: opt < %s -O2 -enable-coroutines -S | FileCheck %s
+
+define i8* @f(i32 %n) {
+entry:
+  %id = call token @llvm.coro.id(i32 0, i8* null, i8* null)
+  %size = call i32 @llvm.coro.size.i32()
+  %alloc = call i8* @malloc(i32 %size)
+  %hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %alloc)
+  br label %loop
+loop:
+  %n.val = phi i32 [ %n, %entry ], [ %inc, %loop ]
+  %inc = add nsw i32 %n.val, 1
+  call void @print(i32 %n.val)
+  %0 = call i8 @llvm.coro.suspend(token none, i1 false)
+  switch i8 %0, label %suspend [i8 0, label %loop
+                                i8 1, label %cleanup]
+cleanup:
+  %mem = call i8* @llvm.coro.free(i8* %hdl)
+  call void @free(i8* %mem)
+  br label %suspend
+suspend:
+  call void @llvm.coro.end(i8* %hdl, i1 false)
+  ret i8* %hdl
+}
+
+; CHECK-LABEL: @main(
+define i32 @main() {
+entry:
+  %hdl = call i8* @f(i32 4)
+  call void @llvm.coro.resume(i8* %hdl)
+  call void @llvm.coro.resume(i8* %hdl)
+  call void @llvm.coro.destroy(i8* %hdl)
+  ret i32 0
+; CHECK-NEXT: entry:
+; CHECK:      call void @print(i32 4)
+; CHECK:      call void @print(i32 5)
+; CHECK:      call void @print(i32 6)
+; CHECK:      ret i32 0
+}
+
+declare i8* @malloc(i32)
+declare void @free(i8*)
+declare void @print(i32)
+
+declare token @llvm.coro.id(i32, i8*, i8*)
+declare i32 @llvm.coro.size.i32()
+declare i8* @llvm.coro.begin(token, i8*)
+declare i8 @llvm.coro.suspend(token, i1)
+declare i8* @llvm.coro.free(i8*)
+declare void @llvm.coro.end(i8*, i1)
+
+declare void @llvm.coro.resume(i8*)
+declare void @llvm.coro.destroy(i8*)
diff --git a/llvm/test/Transforms/Coroutines/smoketest.ll b/llvm/test/Transforms/Coroutines/smoketest.ll
index e173564a8fb..925e45be7c9 100644
--- a/llvm/test/Transforms/Coroutines/smoketest.ll
+++ b/llvm/test/Transforms/Coroutines/smoketest.ll
@@ -1,5 +1,5 @@
 ; Test that all coroutine passes run in the correct order at all optimization
-; levels and -disable-coroutines removes coroutine passes from the pipeline.
+; levels and -enable-coroutines adds coroutine passes to the pipeline.
 ;
 ; RUN: opt < %s -disable-output -enable-coroutines -debug-pass=Arguments -O0 2>&1 | FileCheck %s
 ; RUN: opt < %s -disable-output -enable-coroutines -debug-pass=Arguments -O1 2>&1 | FileCheck %s