llvm-cov: fix a typo and rename a variable.

Rename Size to EndPos, which makes more sense because the variable
stores the last location of the blocks.

Patch by Yuchen Wu!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193189 91177308-0d34-0410-b5e6-96231b3b80d8

lib/IR/GCOV.cpp

@@ -85,7 +85,7 @@ GCOVFunction::~GCOVFunction() {
   DeleteContainerPointers(Blocks);
 }
 
-/// read - Read a aunction from the buffer. Return false if buffer cursor
+/// read - Read a function from the buffer. Return false if buffer cursor
 /// does not point to a function tag.
 bool GCOVFunction::read(GCOVBuffer &Buff, GCOV::GCOVFormat Format) {
   if (!Buff.readFunctionTag())
@@ -136,14 +136,14 @@ bool GCOVFunction::read(GCOVBuffer &Buff, GCOV::GCOVFormat Format) {
   // read line table.
   while (Buff.readLineTag()) {
     uint32_t LineTableLength = Buff.readInt();
-    uint32_t Size = Buff.getCursor() + LineTableLength*4;
+    uint32_t EndPos = Buff.getCursor() + LineTableLength*4;
     uint32_t BlockNo = Buff.readInt();
     assert(BlockNo < BlockCount && "Unexpected Block number!");
     GCOVBlock *Block = Blocks[BlockNo];
     Buff.readInt(); // flag
-    while (Buff.getCursor() != (Size - 4)) {
+    while (Buff.getCursor() != (EndPos - 4)) {
       StringRef Filename = Buff.readString();
-      if (Buff.getCursor() == (Size - 4)) break;
+      if (Buff.getCursor() == (EndPos - 4)) break;
       while (uint32_t L = Buff.readInt())
         Block->addLine(Filename, L);
     }