llvm-cov: Added -a option for block data.

Similar to gcov, llvm-cov will now print out the block count at the end
of each block. Multiple blocks can end on the same line.

One computational difference is by using -a, llvm-cov will no longer
simply add the block counts together to form a line count. Instead, it
will take the maximum of the block counts on that line. This has a
similar effect to what gcov does, but generates more correct counts in
certain scenarios.

Also updated tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196856 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 30 insertions, 3 deletions

diff --git a/lib/IR/GCOV.cpp b/lib/IR/GCOV.cpp
index c7a1102d10..fb7370020a 100644
--- a/lib/IR/GCOV.cpp
+++ b/lib/IR/GCOV.cpp
@@ -358,7 +358,8 @@ void GCOVBlock::dump() const {
 // FileInfo implementation.
 
 /// print -  Print source files with collected line count information.
-void FileInfo::print(StringRef GCNOFile, StringRef GCDAFile) const {
+void FileInfo::print(StringRef GCNOFile, StringRef GCDAFile,
+                     const GCOVOptions &Options) const {
   for (StringMap<LineData>::const_iterator I = LineInfo.begin(),
          E = LineInfo.end(); I != E; ++I) {
     StringRef Filename = I->first();
@@ -385,13 +386,21 @@ void FileInfo::print(StringRef GCNOFile, StringRef GCDAFile) const {
     for (uint32_t i = 0; !AllLines.empty(); ++i) {
       LineData::const_iterator BlocksIt = Line.find(i);
 
-      // Add up the block counts to form line counts.
       if (BlocksIt != Line.end()) {
+        // Add up the block counts to form line counts.
         const BlockVector &Blocks = BlocksIt->second;
         uint64_t LineCount = 0;
         for (BlockVector::const_iterator I = Blocks.begin(), E = Blocks.end();
                I != E; ++I) {
-          LineCount += (*I)->getCount();
+          const GCOVBlock *Block = *I;
+          if (Options.AllBlocks) {
+            // Only take the highest block count for that line.
+            uint64_t BlockCount = Block->getCount();
+            LineCount = LineCount > BlockCount ? LineCount : BlockCount;
+          } else {
+            // Sum up all of the block counts.
+            LineCount += Block->getCount();
+          }
         }
         if (LineCount == 0)
           OS << "    #####:";
@@ -403,6 +412,24 @@ void FileInfo::print(StringRef GCNOFile, StringRef GCDAFile) const {
       std::pair<StringRef, StringRef> P = AllLines.split('\n');
       OS << format("%5u:", i+1) << P.first << "\n";
       AllLines = P.second;
+
+      if (Options.AllBlocks && BlocksIt != Line.end()) {
+        // Output the counts for each block at the last line of the block.
+        uint32_t BlockNo = 0;
+        const BlockVector &Blocks = BlocksIt->second;
+        for (BlockVector::const_iterator I = Blocks.begin(), E = Blocks.end();
+               I != E; ++I) {
+          const GCOVBlock *Block = *I;
+          if (Block->getLastLine() != i+1)
+            continue;
+
+          if (Block->getCount() == 0)
+            OS << "    $$$$$:";
+          else
+            OS << format("%9lu:", Block->getCount());
+          OS << format("%5u-block  %u\n", i+1, BlockNo++);
+        }
+      }
     }
   }
 }