gcc: fix unused variable warnings from GCC 4.6.1

--HG--
extra : rebase_source : f9e22de341493a25ac6106c16ac35c61c128a080

src/dev/i8254xGBe.cc

@@ -2118,11 +2118,12 @@ IGbE::txStateMachine()
     // iteration we'll get the rest of the data
     if (txPacket && txDescCache.packetAvailable()
         && !txDescCache.packetMultiDesc() && txPacket->length) {
-        bool success;
-
         anQ("TXS", "TX FIFO Q");
         DPRINTF(EthernetSM, "TXS: packet placed in TX FIFO\n");
-        success = txFifo.push(txPacket);
+#ifndef NDEBUG
+        bool success =
+#endif
+            txFifo.push(txPacket);
         txFifoTick = true && !drainEvent;
         assert(success);
         txPacket = NULL;

src/dev/ide_ctrl.cc

@@ -490,6 +490,7 @@ IdeController::dispatchAccess(PacketPtr pkt, bool read)
         panic("IDE controller access to invalid address: %#x\n", addr);
     }
 
+#ifndef NDEBUG
     uint32_t data;
     if (pkt->getSize() == 1)
         data = pkt->get<uint8_t>();
@@ -499,6 +500,7 @@ IdeController::dispatchAccess(PacketPtr pkt, bool read)
         data = pkt->get<uint32_t>();
     DPRINTF(IdeCtrl, "%s from offset: %#x size: %#x data: %#x\n",
             read ? "Read" : "Write", pkt->getAddr(), pkt->getSize(), data);
+#endif
 
     pkt->makeAtomicResponse();
 }

src/dev/sinic.cc

@@ -33,6 +33,7 @@
 #include <string>
 
 #include "arch/vtophys.hh"
+#include "base/compiler.hh"
 #include "base/debug.hh"
 #include "base/inet.hh"
 #include "base/types.hh"
@@ -404,7 +405,7 @@ Device::read(PacketPtr pkt)
 
     prepareRead(cpu, index);
 
-    uint64_t value = 0;
+    uint64_t value M5_VAR_USED = 0;
     if (pkt->getSize() == 4) {
         uint32_t reg = regData32(raddr);
         pkt->set(reg);
@@ -916,6 +917,7 @@ Device::rxKick()
                 VirtualReg *vn = &virtualRegs[i];
                 bool busy = Regs::get_RxDone_Busy(vn->RxDone);
                 if (vn->rxIndex != end) {
+#ifndef NDEBUG
                     bool dirty = vn->rxPacketOffset > 0;
                     const char *status;
 
@@ -933,6 +935,7 @@ Device::rxKick()
                             i, status, vn->rxUnique,
                             rxFifo.countPacketsBefore(vn->rxIndex),
                             vn->rxIndex->slack);
+#endif
                 } else if (busy) {
                     DPRINTF(EthernetSM, "vnic %d unmapped (rxunique %d)\n",
                             i, vn->rxUnique);

src/dev/sparc/mm_disk.cc

@@ -56,7 +56,6 @@ MmDisk::read(PacketPtr pkt)
 {
     Addr accessAddr;
     off_t sector;
-    off_t bytes_read;
     uint16_t d16;
     uint32_t d32;
     uint64_t d64;
@@ -68,10 +67,16 @@ MmDisk::read(PacketPtr pkt)
 
     if (sector != curSector) {
         if (dirty) {
-            bytes_read = image->write(diskData, curSector);
-            assert(bytes_read == SectorSize);
+#ifndef NDEBUG
+            off_t bytes_written =
+#endif
+                image->write(diskData, curSector);
+            assert(bytes_written == SectorSize);
         }
-        bytes_read = image->read(diskData,  sector);
+#ifndef NDEBUG
+        off_t bytes_read =
+#endif
+            image->read(diskData, sector);
         assert(bytes_read == SectorSize);
         curSector = sector;
     }
@@ -109,7 +114,6 @@ MmDisk::write(PacketPtr pkt)
 {
     Addr accessAddr;
     off_t sector;
-    off_t bytes_read;
     uint16_t d16;
     uint32_t d32;
     uint64_t d64;
@@ -121,10 +125,16 @@ MmDisk::write(PacketPtr pkt)
 
     if (sector != curSector) {
         if (dirty) {
-            bytes_read = image->write(diskData, curSector);
-            assert(bytes_read == SectorSize);
+#ifndef NDEBUG
+            off_t bytes_written =
+#endif
+                image->write(diskData, curSector);
+            assert(bytes_written == SectorSize);
         }
-        bytes_read = image->read(diskData,  sector);
+#ifndef NDEBUG
+        off_t bytes_read =
+#endif
+            image->read(diskData,  sector);
         assert(bytes_read == SectorSize);
         curSector = sector;
     }
@@ -164,9 +174,11 @@ MmDisk::serialize(std::ostream &os)
 {
     // just write any dirty changes to the cow layer it will take care of
     // serialization
-    int bytes_read;
     if (dirty) {
-        bytes_read = image->write(diskData, curSector);
+#ifndef NDEBUG
+        int bytes_read =
+#endif
+            image->write(diskData, curSector);
         assert(bytes_read == SectorSize);
     }
 }

src/dev/terminal.cc

@@ -259,17 +259,13 @@ Terminal::write(const uint8_t *buf, size_t len)
 uint8_t
 Terminal::in()
 {
-    bool empty;
     uint8_t c;
 
-    empty = rxbuf.empty();
-    assert(!empty);
+    assert(!rxbuf.empty());
     rxbuf.read((char *)&c, 1);
-    empty = rxbuf.empty();
-
 
     DPRINTF(TerminalVerbose, "in: \'%c\' %#02x more: %d\n",
-            isprint(c) ? c : ' ', c, !empty);
+            isprint(c) ? c : ' ', c, !rxbuf.empty());
 
     return c;
 }