1 files changed, 23 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/memmove.ll b/test/Transforms/InstCombine/memmove.ll
new file mode 100644
index 0000000..52ed592
--- /dev/null
+++ b/test/Transforms/InstCombine/memmove.ll
@@ -0,0 +1,23 @@
+; This test makes sure that memmove instructions are properly eliminated.
+;
+; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | \
+; RUN:    not grep {call void @llvm.memmove}
+
+%S = internal constant [33 x sbyte] c"panic: restorelist inconsistency\00"
+
+implementation
+
+declare void %llvm.memmove.i32(sbyte*, sbyte*, uint, uint)
+
+void %test1(sbyte* %A, sbyte* %B, uint %N) {
+ 	;; 0 bytes -> noop.
+	call void %llvm.memmove.i32(sbyte* %A, sbyte* %B, uint 0, uint 1)
+	ret void
+}
+
+void %test2(sbyte *%A, uint %N) {
+ 	;; dest can't alias source since we can't write to source!
+	call void %llvm.memmove.i32(sbyte* %A, sbyte* getelementptr ([33 x sbyte]* %S, int 0, int 0), 
+                                uint %N, uint 1)
+	ret void
+}