Use SmallVectorImpl& instead of SmallVector to avoid repeating small vector size.

llvm-svn: 186098
diff --git a/llvm/lib/CodeGen/LiveInterval.cpp b/llvm/lib/CodeGen/LiveInterval.cpp
index 861e99b..6be6bf3 100644
--- a/llvm/lib/CodeGen/LiveInterval.cpp
+++ b/llvm/lib/CodeGen/LiveInterval.cpp
@@ -415,7 +415,7 @@
 void LiveInterval::join(LiveInterval &Other,
                         const int *LHSValNoAssignments,
                         const int *RHSValNoAssignments,
-                        SmallVector<VNInfo*, 16> &NewVNInfo,
+                        SmallVectorImpl<VNInfo *> &NewVNInfo,
                         MachineRegisterInfo *MRI) {
   verify();
 
diff --git a/llvm/lib/CodeGen/LiveVariables.cpp b/llvm/lib/CodeGen/LiveVariables.cpp
index 6f75700f..ed55d7a 100644
--- a/llvm/lib/CodeGen/LiveVariables.cpp
+++ b/llvm/lib/CodeGen/LiveVariables.cpp
@@ -441,7 +441,7 @@
 }
 
 void LiveVariables::HandlePhysRegDef(unsigned Reg, MachineInstr *MI,
-                                     SmallVector<unsigned, 4> &Defs) {
+                                     SmallVectorImpl<unsigned> &Defs) {
   // What parts of the register are previously defined?
   SmallSet<unsigned, 32> Live;
   if (PhysRegDef[Reg] || PhysRegUse[Reg]) {
@@ -484,7 +484,7 @@
 }
 
 void LiveVariables::UpdatePhysRegDefs(MachineInstr *MI,
-                                      SmallVector<unsigned, 4> &Defs) {
+                                      SmallVectorImpl<unsigned> &Defs) {
   while (!Defs.empty()) {
     unsigned Reg = Defs.back();
     Defs.pop_back();
diff --git a/llvm/lib/CodeGen/MachineLICM.cpp b/llvm/lib/CodeGen/MachineLICM.cpp
index ed3ed4d..6ad4e39 100644
--- a/llvm/lib/CodeGen/MachineLICM.cpp
+++ b/llvm/lib/CodeGen/MachineLICM.cpp
@@ -172,7 +172,7 @@
                    BitVector &PhysRegDefs,
                    BitVector &PhysRegClobbers,
                    SmallSet<int, 32> &StoredFIs,
-                   SmallVector<CandidateInfo, 32> &Candidates);
+                   SmallVectorImpl<CandidateInfo> &Candidates);
 
     /// AddToLiveIns - Add register 'Reg' to the livein sets of BBs in the
     /// current loop.
@@ -404,7 +404,7 @@
                             BitVector &PhysRegDefs,
                             BitVector &PhysRegClobbers,
                             SmallSet<int, 32> &StoredFIs,
-                            SmallVector<CandidateInfo, 32> &Candidates) {
+                            SmallVectorImpl<CandidateInfo> &Candidates) {
   bool RuledOut = false;
   bool HasNonInvariantUse = false;
   unsigned Def = 0;
@@ -1084,7 +1084,7 @@
       return true;
 
     for (unsigned i = BackTrace.size(); i != 0; --i) {
-      SmallVector<unsigned, 8> &RP = BackTrace[i-1];
+      SmallVectorImpl<unsigned> &RP = BackTrace[i-1];
       if (RP[RCId] + Cost >= Limit)
         return true;
     }
@@ -1130,7 +1130,7 @@
 
   // Update register pressure of blocks from loop header to current block.
   for (unsigned i = 0, e = BackTrace.size(); i != e; ++i) {
-    SmallVector<unsigned, 8> &RP = BackTrace[i];
+    SmallVectorImpl<unsigned> &RP = BackTrace[i];
     for (DenseMap<unsigned, int>::iterator CI = Cost.begin(), CE = Cost.end();
          CI != CE; ++CI) {
       unsigned RCId = CI->first;