commit 36b56886974eae4f9c5ebc96befd3e7bfe5de338
author Stephen Hines <srhines@google.com> Wed Apr 23 16:57:46 2014 -0700
committer Stephen Hines <srhines@google.com> Thu Apr 24 15:53:16 2014 -0700
tree e6cfb69fbbd937f450eeb83bfb83b9da3b01275a
parent 69a8640022b04415ae9fac62f8ab090601d8f889

Update to LLVM 3.5a.

Change-Id: Ifadecab779f128e62e430c2b4f6ddd84953ed617

lib/Transforms/Scalar/SimplifyCFGPass.cpp

diff --git a/lib/Transforms/Scalar/SimplifyCFGPass.cpp b/lib/Transforms/Scalar/SimplifyCFGPass.cpp
index 8371f6d..ceae5a7 100644
--- a/lib/Transforms/Scalar/SimplifyCFGPass.cpp
+++ b/lib/Transforms/Scalar/SimplifyCFGPass.cpp
@@ -28,13 +28,13 @@
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/IR/Attributes.h"
+#include "llvm/IR/CFG.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Pass.h"
-#include "llvm/Support/CFG.h"
 #include "llvm/Transforms/Utils/Local.h"
 using namespace llvm;
 
@@ -46,9 +46,9 @@
   CFGSimplifyPass() : FunctionPass(ID) {
     initializeCFGSimplifyPassPass(*PassRegistry::getPassRegistry());
   }
-  virtual bool runOnFunction(Function &F);
+  bool runOnFunction(Function &F) override;
 
-  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<TargetTransformInfo>();
   }
 };
@@ -145,7 +145,7 @@
 /// iterativelySimplifyCFG - Call SimplifyCFG on all the blocks in the function,
 /// iterating until no more changes are made.
 static bool iterativelySimplifyCFG(Function &F, const TargetTransformInfo &TTI,
-                                   const DataLayout *TD) {
+                                   const DataLayout *DL) {
   bool Changed = false;
   bool LocalChange = true;
   while (LocalChange) {
@@ -154,7 +154,7 @@
     // Loop over all of the basic blocks and remove them if they are unneeded...
     //
     for (Function::iterator BBIt = F.begin(); BBIt != F.end(); ) {
-      if (SimplifyCFG(BBIt++, TTI, TD)) {
+      if (SimplifyCFG(BBIt++, TTI, DL)) {
         LocalChange = true;
         ++NumSimpl;
       }
@@ -168,11 +168,15 @@
 // simplify the CFG.
 //
 bool CFGSimplifyPass::runOnFunction(Function &F) {
+  if (skipOptnoneFunction(F))
+    return false;
+
   const TargetTransformInfo &TTI = getAnalysis<TargetTransformInfo>();
-  const DataLayout *TD = getAnalysisIfAvailable<DataLayout>();
+  DataLayoutPass *DLP = getAnalysisIfAvailable<DataLayoutPass>();
+  const DataLayout *DL = DLP ? &DLP->getDataLayout() : 0;
   bool EverChanged = removeUnreachableBlocks(F);
   EverChanged |= mergeEmptyReturnBlocks(F);
-  EverChanged |= iterativelySimplifyCFG(F, TTI, TD);
+  EverChanged |= iterativelySimplifyCFG(F, TTI, DL);
 
   // If neither pass changed anything, we're done.
   if (!EverChanged) return false;
@@ -186,7 +190,7 @@
     return true;
 
   do {
-    EverChanged = iterativelySimplifyCFG(F, TTI, TD);
+    EverChanged = iterativelySimplifyCFG(F, TTI, DL);
     EverChanged |= removeUnreachableBlocks(F);
   } while (EverChanged);