[llvm] r241521 - [FaultMaps] Add statistic to count the # of implicit null checks.

[Sanjoy Das]

Author: sanjoy
Date: Mon Jul  6 18:32:10 2015
New Revision: 241521

URL: http://llvm.org/viewvc/llvm-project?rev=241521&view=rev
Log:
[FaultMaps] Add statistic to count the # of implicit null checks.

Modified:
    llvm/trunk/lib/CodeGen/ImplicitNullChecks.cpp

Modified: llvm/trunk/lib/CodeGen/ImplicitNullChecks.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/ImplicitNullChecks.cpp?rev=241521&r1=241520&r2=241521&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/ImplicitNullChecks.cpp (original)
+++ llvm/trunk/lib/CodeGen/ImplicitNullChecks.cpp Mon Jul  6 18:32:10 2015
@@ -26,6 +26,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/Statistic.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineOperand.h"
@@ -47,6 +48,11 @@ static cl::opt<unsigned> PageSize("imp-n
                                            "bytes"),
                                   cl::init(4096));
 
+#define DEBUG_TYPE "implicit-null-checks"
+
+STATISTIC(NumImplicitNullChecks,
+          "Number of explicit null checks made implicit");
+
 namespace {
 
 class ImplicitNullChecks : public MachineFunctionPass {
@@ -257,6 +263,8 @@ void ImplicitNullChecks::rewriteNullChec
     // Emit the HandlerLabel as an EH_LABEL.
     BuildMI(*NC.NullSucc, NC.NullSucc->begin(), DL,
             TII->get(TargetOpcode::EH_LABEL)).addSym(HandlerLabel);
+
+    NumImplicitNullChecks++;
   }
 }