From 440add86e70055e6654f79a4459809507dc2cc75 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Sun, 23 Apr 2017 11:55:14 -0700
Subject: [PATCH] Make sure that encodings has entries for all instructions
 after legalize().

If we generated new instructions as part of legalize, and the new
instructions failed to legalize, we'd be left with a func.encodings[]
that would panic when you dereferenced the inst.
---
 lib/cretonne/src/legalizer/mod.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/cretonne/src/legalizer/mod.rs b/lib/cretonne/src/legalizer/mod.rs
index 50300027a2..edd233ccee 100644
--- a/lib/cretonne/src/legalizer/mod.rs
+++ b/lib/cretonne/src/legalizer/mod.rs
@@ -100,6 +100,7 @@ pub fn legalize_function(func: &mut Function, cfg: &mut ControlFlowGraph, isa: &
             prev_pos = pos.position();
         }
     }
+    func.encodings.resize(func.dfg.num_insts());
 }
 
 // Include legalization patterns that were generated by `gen_legalizer.py` from the `XForms` in