1 files changed, 49 insertions, 0 deletions
diff --git a/test/Transforms/PartialSpecialize/heuristics.ll b/test/Transforms/PartialSpecialize/heuristics.ll
new file mode 100644
index 0000000..5ccf9ad
--- /dev/null
+++ b/test/Transforms/PartialSpecialize/heuristics.ll
@@ -0,0 +1,49 @@
+; If there are not enough callsites for a particular specialization to
+; justify its existence, the specialization shouldn't be created.
+;
+; RUN: opt -S -partialspecialization -disable-inlining %s | FileCheck %s 
+declare void @callback1()
+declare void @callback2()
+
+declare void @othercall()
+
+define internal void @UseCallback(void()* %pCallback) {
+  call void %pCallback()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  call void @othercall()
+  ret void
+}
+
+define void @foo(void()* %pNonConstCallback)
+{
+Entry:
+; CHECK: Entry
+; CHECK-NOT: call void @UseCallback(void ()* @callback1)
+; CHECK: call void @UseCallback(void ()* @callback2)
+; CHECK-NEXT: call void @UseCallback(void ()* @callback2)
+; CHECK-NEXT: ret void
+  call void @UseCallback(void()* @callback1)
+  call void @UseCallback(void()* @callback1)
+  call void @UseCallback(void()* @callback1)
+  call void @UseCallback(void()* @callback1)
+  call void @UseCallback(void()* @callback2)
+  call void @UseCallback(void()* @callback2)
+
+  ret void
+}