rename a function to indicate that it checks for profitability as well

[oota-llvm.git] / lib / Transforms / Scalar / ADCE.cpp

diff --git a/lib/Transforms/Scalar/ADCE.cpp b/lib/Transforms/Scalar/ADCE.cpp
index b9b828dde09a77c21322d60eb4beea29d5c4d3f5..bdf8029b18ef4694a8f8dd952ccd945497ec08da 100644 (file)
--- a/lib/Transforms/Scalar/ADCE.cpp
+++ b/lib/Transforms/Scalar/ADCE.cpp
@@ -16,13 +16,16 @@
 
 #define DEBUG_TYPE "adce"
 #include "llvm/Transforms/Scalar.h"
+#include "llvm/BasicBlock.h"
 #include "llvm/Instructions.h"
 #include "llvm/Pass.h"
+#include "llvm/Support/CFG.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/InstIterator.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/DenseSet.h"
+#include "llvm/ADT/DepthFirstIterator.h"
+#include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/Statistic.h"
 
 using namespace llvm;
 
@@ -31,10 +34,7 @@ STATISTIC(NumRemoved, "Number of instructions removed");
 namespace {
   struct VISIBILITY_HIDDEN ADCE : public FunctionPass {
     static char ID; // Pass identification, replacement for typeid
-    ADCE() : FunctionPass((intptr_t)&ID) {}
-    
-    DenseSet<Instruction*> alive;
-    SmallVector<Instruction*, 1024> worklist;
+    ADCE() : FunctionPass(&ID) {}
     
     virtual bool runOnFunction(Function& F);
     
@@ -49,8 +49,8 @@ char ADCE::ID = 0;
 static RegisterPass<ADCE> X("adce", "Aggressive Dead Code Elimination");
 
 bool ADCE::runOnFunction(Function& F) {
-  alive.clear();
-  worklist.clear();
+  SmallPtrSet<Instruction*, 128> alive;
+  SmallVector<Instruction*, 128> worklist;
   
   // Collect the set of "root" instructions that are known live.
   for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I)
@@ -87,7 +87,7 @@ bool ADCE::runOnFunction(Function& F) {
     NumRemoved++;
     (*I)->eraseFromParent();
   }
-    
+
   return !worklist.empty();
 }