From d4e4937b79a7da789379a09117cc74f20cd60623 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Fri, 31 Aug 2007 08:26:44 +0000
Subject: [PATCH] Remove an unnecessary element, saving 4 bytes per
 LiveInterval.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41641 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/LiveInterval.h | 9 ++++-----
 lib/CodeGen/LiveInterval.cpp        | 3 ---
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/include/llvm/CodeGen/LiveInterval.h b/include/llvm/CodeGen/LiveInterval.h
index f73cac18923..a80df8f8b8f 100644
--- a/include/llvm/CodeGen/LiveInterval.h
+++ b/include/llvm/CodeGen/LiveInterval.h
@@ -106,12 +106,11 @@ namespace llvm {
     unsigned preference; // preferred register to allocate for this interval
     float weight;        // weight of this interval
     Ranges ranges;       // the ranges in which this register is live
-    unsigned numvals;    // number of value#'s
     VNInfoList valnos;   // value#'s
 
   public:
     LiveInterval(unsigned Reg, float Weight)
-      : reg(Reg), preference(0), weight(Weight), numvals(0) {
+      : reg(Reg), preference(0), weight(Weight) {
     }
 
     typedef Ranges::iterator iterator;
@@ -151,9 +150,9 @@ namespace llvm {
       return I;
     }
 
-    bool containsOneValue() const { return numvals == 1; }
+    bool containsOneValue() const { return valnos.size() == 1; }
 
-    unsigned getNumValNums() const { return numvals; }
+    unsigned getNumValNums() const { return valnos.size(); }
     
     /// getFirstValNumInfo - Returns pointer to the first val#.
     ///
@@ -175,7 +174,7 @@ namespace llvm {
     /// getNextValue - Create a new value number and return it.  MIIdx specifies
     /// the instruction that defines the value number.
     VNInfo *getNextValue(unsigned MIIdx, unsigned SrcReg) {
-      VNInfo *VNI = new VNInfo(this, numvals++, MIIdx, SrcReg);
+      VNInfo *VNI = new VNInfo(this, valnos.size(), MIIdx, SrcReg);
       valnos.push_back(VNI);
       return VNI;
     }
diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp
index b10a7218209..c9e98bc42a6 100644
--- a/lib/CodeGen/LiveInterval.cpp
+++ b/lib/CodeGen/LiveInterval.cpp
@@ -349,13 +349,11 @@ void LiveInterval::join(LiveInterval &Other, int *LHSValNoAssignments,
   // Update val# info. Renumber them and make sure they all belong to this
   // LiveInterval now.
   valnos.clear();
-  numvals = 0;
   for (unsigned i = 0, e = NewVNInfo.size(); i != e; ++i) {
     VNInfo *VNI = NewVNInfo[i];
     VNI->parent = this;
     VNI->id = i;  // Renumber val#.
     valnos.push_back(VNI);
-    ++numvals;
   }
 
   // Okay, now insert the RHS live ranges into the LHS.
@@ -484,7 +482,6 @@ void LiveInterval::MergeValueNumberInto(VNInfo *V1, VNInfo *V2) {
       VNInfo *VNI = valnos.back();
       valnos.pop_back();
       delete VNI;
-      --numvals;
     } while (valnos.back()->def == ~1U);
   } else {
     V1->def = ~1U;