From 4fa152555d64537a47bb378c41f12d685a9a9d96 Mon Sep 17 00:00:00 2001
From: Duncan Sands <baldrick@free.fr>
Date: Fri, 25 Jun 2010 14:48:39 +0000
Subject: [PATCH] Remove variables which are assigned to but for which the
 value is not used.  Spotted by gcc-4.6.

llvm-svn: 106854
---
 lib/CodeGen/SelectionDAG/DAGCombiner.cpp         | 1 -
 lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp  | 9 +--------
 lib/CodeGen/SelectionDAG/SelectionDAG.cpp        | 1 -
 lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 1 -
 4 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index a72415f9532..d817c484334 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -6108,7 +6108,6 @@ SDValue DAGCombiner::visitEXTRACT_VECTOR_ELT(SDNode *N) {
    // Check if the result type doesn't match the inserted element type. A
    // SCALAR_TO_VECTOR may truncate the inserted element and the
    // EXTRACT_VECTOR_ELT may widen the extracted vector.
-   EVT EltVT = InVec.getValueType().getVectorElementType();
    SDValue InOp = InVec.getOperand(0);
    EVT NVT = N->getValueType(0);
    if (InOp.getValueType() != NVT) {
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
index c54f36002ea..aa6ce05992c 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
@@ -168,7 +168,6 @@ void ScheduleDAGSDNodes::ClusterNeighboringLoads(SDNode *Node) {
   DenseMap<long long, SDNode*> O2SMap;  // Map from offset to SDNode.
   bool Cluster = false;
   SDNode *Base = Node;
-  int64_t BaseOffset;
   for (SDNode::use_iterator I = Chain->use_begin(), E = Chain->use_end();
        I != E; ++I) {
     SDNode *User = *I;
@@ -184,12 +183,8 @@ void ScheduleDAGSDNodes::ClusterNeighboringLoads(SDNode *Node) {
       Offsets.push_back(Offset1);
     O2SMap.insert(std::make_pair(Offset2, User));
     Offsets.push_back(Offset2);
-    if (Offset2 < Offset1) {
+    if (Offset2 < Offset1)
       Base = User;
-      BaseOffset = Offset2;
-    } else {
-      BaseOffset = Offset1;
-    }
     Cluster = true;
   }
 
@@ -625,7 +620,6 @@ MachineBasicBlock *ScheduleDAGSDNodes::EmitSchedule() {
     SDDbgInfo::DbgIterator DE = DAG->DbgEnd();
     // Now emit the rest according to source order.
     unsigned LastOrder = 0;
-    MachineInstr *LastMI = 0;
     for (unsigned i = 0, e = Orders.size(); i != e && DI != DE; ++i) {
       unsigned Order = Orders[i].first;
       MachineInstr *MI = Orders[i].second;
@@ -657,7 +651,6 @@ MachineBasicBlock *ScheduleDAGSDNodes::EmitSchedule() {
         }
       }
       LastOrder = Order;
-      LastMI = MI;
     }
     // Add trailing DbgValue's before the terminator. FIXME: May want to add
     // some of them before one or more conditional branches?
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index cd86f8fc32e..5c35df70c5a 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2286,7 +2286,6 @@ bool SelectionDAG::isVerifiedDebugInfoDesc(SDValue Op) const {
 SDValue SelectionDAG::getShuffleScalarElt(const ShuffleVectorSDNode *N,
                                           unsigned i) {
   EVT VT = N->getValueType(0);
-  DebugLoc dl = N->getDebugLoc();
   if (N->getMaskElt(i) < 0)
     return getUNDEF(VT.getVectorElementType());
   unsigned Index = N->getMaskElt(i);
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 7e3ad06ba6f..70c63f61b54 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -4177,7 +4177,6 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
     DAG.getMachineFunction().getMMI().setCallsUnwindInit(true);
     return 0;
   case Intrinsic::eh_dwarf_cfa: {
-    EVT VT = getValue(I.getArgOperand(0)).getValueType();
     SDValue CfaArg = DAG.getSExtOrTrunc(getValue(I.getArgOperand(0)), dl,
                                         TLI.getPointerTy());
     SDValue Offset = DAG.getNode(ISD::ADD, dl,