From 9d29cbad32814f31c91cd2464a3c74df412b0aac Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Sat, 9 Apr 2011 02:59:05 +0000
Subject: Precompute interference for neighbor blocks as long as there is no
 interference.

This doesn't require seeking in the live interval union, so it is very cheap.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129187 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/InterferenceCache.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'lib/CodeGen/InterferenceCache.h')

diff --git a/lib/CodeGen/InterferenceCache.h b/lib/CodeGen/InterferenceCache.h
index 2e613ae095..6c36fa4021 100644
--- a/lib/CodeGen/InterferenceCache.h
+++ b/lib/CodeGen/InterferenceCache.h
@@ -43,6 +43,9 @@ class InterferenceCache {
     /// change.
     unsigned Tag;
 
+    /// MF - The current function.
+    MachineFunction *MF;
+
     /// Indexes - Mapping block numbers to SlotIndex ranges.
     SlotIndexes *Indexes;
 
@@ -67,8 +70,9 @@ class InterferenceCache {
   public:
     Entry() : PhysReg(0), Tag(0), Indexes(0) {}
 
-    void clear(SlotIndexes *indexes) {
+    void clear(MachineFunction *mf, SlotIndexes *indexes) {
       PhysReg = 0;
+      MF = mf;
       Indexes = indexes;
     }
 
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