Introduce new AST statistics that keep track of the number of isa (or

dyn_cast) invocations for C++ and Objective-C types, declarations,
expressions, and statements. The statistics will be printed when
-print-stats is provided to Clang -cc1, with results such as:

277073 clang - Number of checks for C++ declaration nodes
 13311 clang - Number of checks for C++ expression nodes
    18 clang - Number of checks for C++ statement nodes
174182 clang - Number of checks for C++ type nodes
 92300 clang - Number of checks for Objective-C declaration nodes
  9800 clang - Number of checks for Objective-C expression nodes
     7 clang - Number of checks for Objective-C statement nodes
 65733 clang - Number of checks for Objective-C type nodes

The statistics are only gathered when NDEBUG is not defined, since
they introduce potentially-expensive operations into very low-level
routines (isa).




git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99912 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 28 insertions, 0 deletions

diff --git a/lib/AST/DeclBase.cpp b/lib/AST/DeclBase.cpp
index c693e153dd..522875f64f 100644
--- a/lib/AST/DeclBase.cpp
+++ b/lib/AST/DeclBase.cpp
@@ -35,6 +35,13 @@ using namespace clang;
 //  Statistics
 //===----------------------------------------------------------------------===//
 
+#ifndef NDEBUG
+llvm::Statistic clang::objc_decl_checks = 
+  { "clang", "Number of checks for Objective-C declaration nodes", 0, 0 };
+llvm::Statistic clang::cxx_decl_checks = 
+  { "clang", "Number of checks for C++ declaration nodes", 0, 0 };
+#endif
+
 #define DECL(Derived, Base) static int n##Derived##s = 0;
 #include "clang/AST/DeclNodes.def"
 
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index b4e5a5d960..935a2080dc 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -27,6 +27,13 @@
 #include <algorithm>
 using namespace clang;
 
+#ifndef NDEBUG
+llvm::Statistic clang::objc_expr_checks = 
+  { "clang", "Number of checks for Objective-C expression nodes", 0, 0 };
+llvm::Statistic clang::cxx_expr_checks = 
+  { "clang", "Number of checks for C++ expression nodes", 0, 0 };
+#endif
+
 //===----------------------------------------------------------------------===//
 // Primary Expressions.
 //===----------------------------------------------------------------------===//
diff --git a/lib/AST/Stmt.cpp b/lib/AST/Stmt.cpp
index 8347249a46..bb6db228d2 100644
--- a/lib/AST/Stmt.cpp
+++ b/lib/AST/Stmt.cpp
@@ -22,6 +22,13 @@
 #include <cstdio>
 using namespace clang;
 
+#ifndef NDEBUG
+llvm::Statistic clang::objc_stmt_checks = 
+  { "clang", "Number of checks for Objective-C statement nodes", 0, 0 };
+llvm::Statistic clang::cxx_stmt_checks = 
+  { "clang", "Number of checks for C++ statement nodes", 0, 0 };
+#endif
+
 static struct StmtClassNameTable {
   const char *Name;
   unsigned Counter;
diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index 8a64f8ea97..22dd2ecd64 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -22,6 +22,13 @@
 #include "llvm/Support/raw_ostream.h"
 using namespace clang;
 
+#ifndef NDEBUG
+llvm::Statistic clang::objc_type_checks = 
+  { "clang", "Number of checks for Objective-C type nodes", 0, 0 };
+llvm::Statistic clang::cxx_type_checks = 
+  { "clang", "Number of checks for C++ type nodes", 0, 0 };
+#endif
+
 bool QualType::isConstant(QualType T, ASTContext &Ctx) {
   if (T.isConstQualified())
     return true;