From bd0590604d1da3c9bccbdcadd09f2b0b3997ac47 Mon Sep 17 00:00:00 2001
From: Dan Gohman <sunfish@mozilla.com>
Date: Thu, 31 Aug 2017 07:45:35 -0700
Subject: [PATCH] Test dfg's next_inst().

---
 lib/cretonne/src/ir/dfg.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/cretonne/src/ir/dfg.rs b/lib/cretonne/src/ir/dfg.rs
index 219557aeb8..8a1447f858 100644
--- a/lib/cretonne/src/ir/dfg.rs
+++ b/lib/cretonne/src/ir/dfg.rs
@@ -866,7 +866,10 @@ mod tests {
         let mut dfg = DataFlowGraph::new();
 
         let idata = InstructionData::Nullary { opcode: Opcode::Iconst };
+        let next = dfg.next_inst();
         let inst = dfg.make_inst(idata);
+        assert_eq!(next, inst);
+
         dfg.make_inst_results(inst, types::I32);
         assert_eq!(inst.to_string(), "inst0");
         assert_eq!(dfg.display_inst(inst, None).to_string(), "v0 = iconst.i32");