Add missing newlines at EOF (for clang++).

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

diff --git a/lib/Transforms/Scalar/SimplifyCFGPass.cpp b/lib/Transforms/Scalar/SimplifyCFGPass.cpp
index de04fda91509ad99622658083b2a62f748970af1..e905952c5db76b14c1153c4fcdbcc452b21161ce 100644 (file)
--- a/lib/Transforms/Scalar/SimplifyCFGPass.cpp
+++ b/lib/Transforms/Scalar/SimplifyCFGPass.cpp
@@ -27,9 +27,8 @@
 #include "llvm/Constants.h"
 #include "llvm/Instructions.h"
 #include "llvm/Module.h"
-#include "llvm/ParameterAttributes.h"
+#include "llvm/Attributes.h"
 #include "llvm/Support/CFG.h"
-#include "llvm/Support/Compiler.h"
 #include "llvm/Pass.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/SmallPtrSet.h"
@@ -39,7 +38,7 @@ using namespace llvm;
 STATISTIC(NumSimpl, "Number of blocks simplified");
 
 namespace {
-  struct VISIBILITY_HIDDEN CFGSimplifyPass : public FunctionPass {
+  struct CFGSimplifyPass : public FunctionPass {
     static char ID; // Pass identification, replacement for typeid
     CFGSimplifyPass() : FunctionPass(&ID) {}
 
@@ -64,7 +63,7 @@ static void ChangeToUnreachable(Instruction *I) {
   for (succ_iterator SI = succ_begin(BB), SE = succ_end(BB); SI != SE; ++SI)
     (*SI)->removePredecessor(BB);
   
-  new UnreachableInst(I);
+  new UnreachableInst(I->getContext(), I);
   
   // All instructions after this are dead.
   BasicBlock::iterator BBI = I, BBE = BB->end();
@@ -83,7 +82,7 @@ static void ChangeToCall(InvokeInst *II) {
                                        Args.end(), "", II);
   NewCall->takeName(II);
   NewCall->setCallingConv(II->getCallingConv());
-  NewCall->setParamAttrs(II->getParamAttrs());
+  NewCall->setAttributes(II->getAttributes());
   II->replaceAllUsesWith(NewCall);
 
   // Follow the call by a branch to the normal destination.
@@ -125,13 +124,20 @@ static bool MarkAliveBlocks(BasicBlock *BB,
         }
       }
       
-      if (StoreInst *SI = dyn_cast<StoreInst>(BBI))
-        if (isa<ConstantPointerNull>(SI->getOperand(1)) ||
-            isa<UndefValue>(SI->getOperand(1))) {
+      // Store to undef and store to null are undefined and used to signal that
+      // they should be changed to unreachable by passes that can't modify the
+      // CFG.
+      if (StoreInst *SI = dyn_cast<StoreInst>(BBI)) {
+        Value *Ptr = SI->getOperand(1);
+        
+        if (isa<UndefValue>(Ptr) ||
+            (isa<ConstantPointerNull>(Ptr) &&
+             SI->getPointerAddressSpace() == 0)) {
           ChangeToUnreachable(SI);
           Changed = true;
           break;
         }
+      }
     }
 
     // Turn invokes that call 'nounwind' functions into ordinary calls.