From: Chris Lattner <sabre@nondot.org>
Date: Mon, 15 Nov 2004 07:02:42 +0000 (+0000)
Subject: Count more accurately
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=b77d5d8d50b146cc93082dbc07d5928ae80a20ca;p=oota-llvm.git

Count more accurately


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17824 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp
index f3025523bcd..9b552014077 100644
--- a/lib/Transforms/Scalar/SCCP.cpp
+++ b/lib/Transforms/Scalar/SCCP.cpp
@@ -44,6 +44,7 @@ using namespace llvm;
 //
 namespace {
   Statistic<> NumInstRemoved("sccp", "Number of instructions removed");
+  Statistic<> NumDeadBlocks ("sccp", "Number of basic blocks unreachable");
 
 class LatticeVal {
   enum { 
@@ -853,6 +854,8 @@ bool SCCP::runOnFunction(Function &F) {
   for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
     if (!ExecutableBBs.count(BB)) {
       DEBUG(std::cerr << "  BasicBlock Dead:" << *BB);
+      ++NumDeadBlocks;
+
       // Delete the instructions backwards, as it has a reduced likelihood of
       // having to update as many def-use and use-def chains.
       std::vector<Instruction*> Insts;
@@ -866,6 +869,7 @@ bool SCCP::runOnFunction(Function &F) {
           I->replaceAllUsesWith(UndefValue::get(I->getType()));
         BB->getInstList().erase(I);
         MadeChanges = true;
+        ++NumInstRemoved;
       }
     }