[analyzer] Use inline storage in the FunctionSummary DenseMap.

The summaries lasted for the lifetime of the map anyway; no reason to
include an extra allocation.

Also, use SmallBitVector instead of BitVector to track the visited basic
blocks -- most functions will have less than 64 basic blocks -- and
use bitfields for the other fields to reduce the size of the structure.

No functionality change.

llvm-svn: 178514

1 files changed, 4 insertions, 10 deletions

diff --git a/clang/lib/StaticAnalyzer/Core/FunctionSummary.cpp b/clang/lib/StaticAnalyzer/Core/FunctionSummary.cpp
index c227aac2b4c..c21735b8b88 100644
--- a/clang/lib/StaticAnalyzer/Core/FunctionSummary.cpp
+++ b/clang/lib/StaticAnalyzer/Core/FunctionSummary.cpp
@@ -1,4 +1,4 @@
-//== FunctionSummary.h - Stores summaries of functions. ------------*- C++ -*-//
+//== FunctionSummary.cpp - Stores summaries of functions. ----------*- C++ -*-//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file defines a summary of a function gathered/used by static analyzes.
+// This file defines a summary of a function gathered/used by static analysis.
 //
 //===----------------------------------------------------------------------===//
 
@@ -15,16 +15,10 @@
 using namespace clang;
 using namespace ento;
 
-FunctionSummariesTy::~FunctionSummariesTy() {
-  for (MapTy::iterator I = Map.begin(), E = Map.end(); I != E; ++I) {
-    delete(I->second);
-  }
-}
-
 unsigned FunctionSummariesTy::getTotalNumBasicBlocks() {
   unsigned Total = 0;
   for (MapTy::iterator I = Map.begin(), E = Map.end(); I != E; ++I) {
-    Total += I->second->TotalBasicBlocks;
+    Total += I->second.TotalBasicBlocks;
   }
   return Total;
 }
@@ -32,7 +26,7 @@ unsigned FunctionSummariesTy::getTotalNumBasicBlocks() {
 unsigned FunctionSummariesTy::getTotalNumVisitedBasicBlocks() {
   unsigned Total = 0;
   for (MapTy::iterator I = Map.begin(), E = Map.end(); I != E; ++I) {
-    Total += I->second->VisitedBasicBlocks.count();
+    Total += I->second.VisitedBasicBlocks.count();
   }
   return Total;
 }