1 files changed, 52 insertions, 0 deletions
diff --git a/llvm/test/Verifier/gcroot.ll b/llvm/test/Verifier/gcroot.ll
new file mode 100644
index 00000000000..75e51d7ec5b
--- /dev/null
+++ b/llvm/test/Verifier/gcroot.ll
@@ -0,0 +1,52 @@
+; RUN: not llvm-as -o /dev/null %s 2>&1 | FileCheck %s
+; PR1633
+
+declare void @llvm.gcroot(i8**, i8*)
+
+define void @caller_must_use_gc() {
+  ; CHECK: Enclosing function does not use GC.
+  ; CHECK-NEXT: call void @llvm.gcroot(i8** %alloca, i8* null)
+  %alloca = alloca i8*
+  call void @llvm.gcroot(i8** %alloca, i8* null)
+  ret void
+}
+
+define void @must_be_alloca() gc "test" {
+; CHECK: llvm.gcroot parameter #1 must be an alloca.
+; CHECK-NEXT: call void @llvm.gcroot(i8** null, i8* null)
+  call void @llvm.gcroot(i8** null, i8* null)
+  ret void
+}
+
+define void @non_ptr_alloca_null() gc "test" {
+  ; CHECK: llvm.gcroot parameter #1 must either be a pointer alloca, or argument #2 must be a non-null constant.
+  ; CHECK-NEXT: call void @llvm.gcroot(i8** %cast.alloca, i8* null)
+  %alloca = alloca i32
+  %cast.alloca = bitcast i32* %alloca to i8**
+  call void @llvm.gcroot(i8** %cast.alloca, i8* null)
+  ret void
+}
+
+define void @non_constant_arg1(i8* %arg) gc "test" {
+  ; CHECK: llvm.gcroot parameter #2 must be a constant.
+  ; CHECK-NEXT: call void @llvm.gcroot(i8** %alloca, i8* %arg)
+  %alloca = alloca i8*
+  call void @llvm.gcroot(i8** %alloca, i8* %arg)
+  ret void
+}
+
+define void @non_ptr_alloca_non_null() gc "test" {
+; CHECK-NOT: llvm.gcroot parameter
+  %alloca = alloca i32
+  %cast.alloca = bitcast i32* %alloca to i8**
+  call void @llvm.gcroot(i8** %cast.alloca, i8* inttoptr (i64 123 to i8*))
+  ret void
+}
+
+define void @casted_alloca() gc "test" {
+; CHECK-NOT: llvm.gcroot parameter
+  %alloca = alloca i32*
+  %ptr.cast.alloca = bitcast i32** %alloca to i8**
+  call void @llvm.gcroot(i8** %ptr.cast.alloca, i8* null)
+  ret void
+}