From ebadbdbe7e8f3f35327a9cd26c16473d1f5bd7a0 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <jolesen@mozilla.com>
Date: Tue, 20 Sep 2016 10:17:16 -0700
Subject: [PATCH] Store instruction encodings in Function.

This is a side-table of ISA-dependent information that will initially be
filled out by the legalizer.
---
 cranelift/src/libcretonne/ir/function.rs | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/cranelift/src/libcretonne/ir/function.rs b/cranelift/src/libcretonne/ir/function.rs
index ac6c962861..3ff5aea00f 100644
--- a/cranelift/src/libcretonne/ir/function.rs
+++ b/cranelift/src/libcretonne/ir/function.rs
@@ -3,10 +3,11 @@
 //! The `Function` struct defined in this module owns all of its extended basic blocks and
 //! instructions.
 
-use ir::{FunctionName, Signature, StackSlot, StackSlotData, JumpTable, JumpTableData,
-         DataFlowGraph, Layout};
-use entity_map::{EntityMap, PrimaryEntityData};
 use std::fmt::{self, Display, Debug, Formatter};
+use ir::{FunctionName, Signature, Inst, StackSlot, StackSlotData, JumpTable, JumpTableData,
+         DataFlowGraph, Layout};
+use isa::Encoding;
+use entity_map::{EntityMap, PrimaryEntityData};
 use write::write_function;
 
 /// A function.
@@ -32,6 +33,10 @@ pub struct Function {
 
     /// Layout of EBBs and instructions in the function body.
     pub layout: Layout,
+
+    /// Encoding recipe and bits for the legal instructions.
+    /// Illegal instructions have the `Encoding::default()` value.
+    pub encodings: EntityMap<Inst, Encoding>,
 }
 
 impl PrimaryEntityData for StackSlotData {}
@@ -47,6 +52,7 @@ impl Function {
             jump_tables: EntityMap::new(),
             dfg: DataFlowGraph::new(),
             layout: Layout::new(),
+            encodings: EntityMap::new(),
         }
     }