From d01653f827cc962734f464be9502eb16cd907a44 Mon Sep 17 00:00:00 2001
From: Philip Reames <listmail@philipreames.com>
Date: Fri, 2 Apr 2021 08:56:49 -0700
Subject: [PATCH] [rs4gc] add tests for existing code stripping attributes from
 function signatures

---
 .../strip-invalid-attributes.ll                    | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 llvm/test/Transforms/RewriteStatepointsForGC/strip-invalid-attributes.ll

diff --git a/llvm/test/Transforms/RewriteStatepointsForGC/strip-invalid-attributes.ll b/llvm/test/Transforms/RewriteStatepointsForGC/strip-invalid-attributes.ll
new file mode 100644
index 0000000..bc3d970
--- /dev/null
+++ b/llvm/test/Transforms/RewriteStatepointsForGC/strip-invalid-attributes.ll
@@ -0,0 +1,45 @@
+; RUN: opt -S -rewrite-statepoints-for-gc  < %s | FileCheck %s
+; RUN: opt -S -passes=rewrite-statepoints-for-gc  < %s | FileCheck %s
+
+
+; Ensure we're stipping attributes from the function signatures which are invalid
+; after inserting safepoints with explicit memory semantics
+
+declare void @f()
+
+define i8 addrspace(1)* @deref_arg(i8 addrspace(1)* dereferenceable(16) %arg) gc "statepoint-example" {
+; CHECK: define i8 addrspace(1)* @deref_arg(i8 addrspace(1)* %arg)
+  call void @f()
+  ret i8 addrspace(1)* %arg
+}
+
+define dereferenceable(16) i8 addrspace(1)* @deref_ret(i8 addrspace(1)* %arg) gc "statepoint-example" {
+; CHECK: define i8 addrspace(1)* @deref_ret(i8 addrspace(1)* %arg)
+  call void @f()
+  ret i8 addrspace(1)* %arg
+}
+
+define i8 addrspace(1)* @deref_or_null_arg(i8 addrspace(1)* dereferenceable_or_null(16) %arg) gc "statepoint-example" {
+; CHECK: define i8 addrspace(1)* @deref_or_null_arg(i8 addrspace(1)* %arg)
+  call void @f()
+  ret i8 addrspace(1)* %arg
+}
+
+define dereferenceable_or_null(16) i8 addrspace(1)* @deref_or_null_ret(i8 addrspace(1)* %arg) gc "statepoint-example" {
+; CHECK: define i8 addrspace(1)* @deref_or_null_ret(i8 addrspace(1)* %arg)
+  call void @f()
+  ret i8 addrspace(1)* %arg
+}
+
+define i8 addrspace(1)* @noalias_arg(i8 addrspace(1)* noalias %arg) gc "statepoint-example" {
+; CHECK: define i8 addrspace(1)* @noalias_arg(i8 addrspace(1)* %arg)
+  call void @f()
+  ret i8 addrspace(1)* %arg
+}
+
+define noalias i8 addrspace(1)* @noalias_ret(i8 addrspace(1)* %arg) gc "statepoint-example" {
+; CHECK: define i8 addrspace(1)* @noalias_ret(i8 addrspace(1)* %arg)
+  call void @f()
+  ret i8 addrspace(1)* %arg
+}
+
-- 
2.7.4