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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241521 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjoy Das 2015-07-06 23:32:10 +00:00
parent 4214e961d7
commit 0b1bc70dbf
1 changed files with 8 additions and 0 deletions
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8
lib/CodeGen/ImplicitNullChecks.cpp
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@ -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-null-check-page-size",
"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::rewriteNullChecks(
// Emit the HandlerLabel as an EH_LABEL.
BuildMI(*NC.NullSucc, NC.NullSucc->begin(), DL,
TII->get(TargetOpcode::EH_LABEL)).addSym(HandlerLabel);
NumImplicitNullChecks++;
}
}