[analyzer] Record the basic blocks covered by the analyzes run.

Store this info inside the function summary generated for all analyzed
functions. This is useful for coverage stats and can be helpful for
analyzer state space search strategies.

llvm-svn: 153923

1 files changed, 10 insertions, 0 deletions

diff --git a/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp b/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp
index 3b9deda2bac..df2d265cad0 100644
--- a/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp
+++ b/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp
@@ -53,6 +53,9 @@ static ExplodedNode::Auditor* CreateUbiViz();
 
 STATISTIC(NumFunctionTopLevel, "The # of functions at top level.");
 STATISTIC(NumFunctionsAnalyzed, "The # of functions analysed (as top level).");
+STATISTIC(NumBlocksInAnalyzedFunctions,
+                     "The # of basic blocks in the analyzed functions.");
+STATISTIC(PercentReachableBlocks, "The % of reachable basic blocks.");
 
 //===----------------------------------------------------------------------===//
 // Special PathDiagnosticConsumers.
@@ -122,6 +125,13 @@ public:
   }
 
   ~AnalysisConsumer() {
+    // Count how many basic blocks we have not covered.
+    NumBlocksInAnalyzedFunctions = FunctionSummaries.getTotalNumBasicBlocks();
+    if (NumBlocksInAnalyzedFunctions > 0)
+      PercentReachableBlocks =
+        (FunctionSummaries.getTotalNumVisitedBasicBlocks() * 100) /
+          NumBlocksInAnalyzedFunctions;
+
     if (Opts.PrintStats)
       delete TUTotalTimer;
   }