From dcdfa59aec756ddf2d64d42f912357bd601b4d1b Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <jolesen@mozilla.com>
Date: Wed, 7 Jun 2017 11:33:47 -0700
Subject: [PATCH] Implement a conversion from ValueDef into ProgramPoint.

A ValueDef is really no more than a program point plus an
argument/result number.
---
 lib/cretonne/src/ir/progpoint.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/lib/cretonne/src/ir/progpoint.rs b/lib/cretonne/src/ir/progpoint.rs
index 7d57ab8cb9..c99e79dbe6 100644
--- a/lib/cretonne/src/ir/progpoint.rs
+++ b/lib/cretonne/src/ir/progpoint.rs
@@ -1,7 +1,7 @@
 //! Program points.
 
 use entity_map::EntityRef;
-use ir::{Ebb, Inst};
+use ir::{Ebb, Inst, ValueDef};
 use std::fmt;
 use std::u32;
 use std::cmp;
@@ -32,6 +32,15 @@ impl From<Ebb> for ProgramPoint {
     }
 }
 
+impl From<ValueDef> for ProgramPoint {
+    fn from(def: ValueDef) -> ProgramPoint {
+        match def {
+            ValueDef::Res(inst, _) => inst.into(),
+            ValueDef::Arg(ebb, _) => ebb.into(),
+        }
+    }
+}
+
 /// An expanded program point directly exposes the variants, but takes twice the space to
 /// represent.
 #[derive(PartialEq, Eq, Clone, Copy)]