[MemCpyOpt] Add test for llvm#67539 (NFC)

(cherry picked from commit d5c8b23)

llvm/test/Transforms/MemCpyOpt/memcpy.ll

@@ -694,3 +694,20 @@ define void @immut_valid_align_branched(i1 %c, ptr noalias align 4 %val) {
   call void @f(ptr nocapture noalias readonly %val3)
   ret void
 }
+
+; FIXME: This is a miscompile.
+define void @immut_param_noalias_metadata(ptr align 4 byval(i32) %ptr) {
+; CHECK-LABEL: @immut_param_noalias_metadata(
+; CHECK-NEXT:    call void @f(ptr noalias nocapture readonly [[PTR:%.*]]), !alias.scope !0
+; CHECK-NEXT:    ret void
+;
+  %tmp = alloca i32, align 4
+  store i32 1, ptr %ptr, !noalias !2
+  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %tmp, ptr align 4 %ptr, i64 4, i1 false)
+  call void @f(ptr nocapture noalias readonly %tmp), !alias.scope !2
+  ret void
+}
+
+!0 = !{!0}
+!1 = !{!1, !0}
+!2 = !{!1}