enhance memcpyopt to zap memcpy's that have the same src/dst.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121362 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Transforms/MemCpyOpt/memcpy.ll b/test/Transforms/MemCpyOpt/memcpy.ll
index 16b80a6..b387d32 100644
--- a/test/Transforms/MemCpyOpt/memcpy.ll
+++ b/test/Transforms/MemCpyOpt/memcpy.ll
@@ -100,3 +100,12 @@
; CHECK: store i8 4
; CHECK: call void @test5a(%struct.S* byval align 16 %y)
}
+
+;; Noop memcpy should be zapped.
+define void @test6(i8 *%P) {
+ call void @llvm.memcpy.p0i8.p0i8.i64(i8* %P, i8* %P, i64 8, i32 4, i1 false)
+ ret void
+; CHECK: @test6
+; CHECK-NEXT: ret void
+}
+