From 033c9715d9bf7ce59ad2e466bf0720811b34da08 Mon Sep 17 00:00:00 2001
From: Jim Laskey <jlaskey@mac.com>
Date: Thu, 22 Feb 2007 16:39:03 +0000
Subject: [PATCH] Remove isAccessable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34497 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/MachineBasicBlock.h | 4 ----
 lib/CodeGen/BranchFolding.cpp            | 8 ++++----
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/include/llvm/CodeGen/MachineBasicBlock.h b/include/llvm/CodeGen/MachineBasicBlock.h
index ed2219b9f38..1cb6e0b5c34 100644
--- a/include/llvm/CodeGen/MachineBasicBlock.h
+++ b/include/llvm/CodeGen/MachineBasicBlock.h
@@ -165,10 +165,6 @@ public:
   /// this basic block is entered via an exception handler.
   void setIsLandingPad() { IsLandingPad = true; }
 
-  /// isAccessable - Returns true if the block is alive.  That is, if it has
-  /// predecessors or is an eh landing pad.
-  bool isAccessable() const { return !pred_empty() || isLandingPad(); }
-
   // Code Layout methods.
   
   /// moveBefore/moveAfter - move 'this' block before or after the specified
diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp
index 6c0434180e2..d6bedb844bd 100644
--- a/lib/CodeGen/BranchFolding.cpp
+++ b/lib/CodeGen/BranchFolding.cpp
@@ -67,7 +67,7 @@ FunctionPass *llvm::createBranchFoldingPass() { return new BranchFolder(); }
 /// RemoveDeadBlock - Remove the specified dead machine basic block from the
 /// function, updating the CFG.
 void BranchFolder::RemoveDeadBlock(MachineBasicBlock *MBB) {
-  assert(!MBB->isAccessable() && "MBB must be dead!");
+  assert(MBB->pred_empty() && "MBB must be dead!");
   DOUT << "\nRemoving MBB: " << *MBB;
   
   MachineFunction *MF = MBB->getParent();
@@ -440,7 +440,7 @@ bool BranchFolder::OptimizeBranches(MachineFunction &MF) {
     OptimizeBlock(MBB);
     
     // If it is dead, remove it.
-    if (!MBB->isAccessable()) {
+    if (MBB->pred_empty()) {
       RemoveDeadBlock(MBB);
       MadeChange = true;
       ++NumDeadBlocks;
@@ -618,14 +618,14 @@ void BranchFolder::OptimizeBlock(MachineBasicBlock *MBB) {
   // explicitly.
   if (MBB->empty()) {
     // Dead block?  Leave for cleanup later.
-    if (!MBB->isAccessable()) return;
+    if (MBB->pred_empty()) return;
     
     if (FallThrough == MBB->getParent()->end()) {
       // TODO: Simplify preds to not branch here if possible!
     } else {
       // Rewrite all predecessors of the old block to go to the fallthrough
       // instead.
-      while (MBB->isAccessable()) {
+      while (!MBB->pred_empty()) {
         MachineBasicBlock *Pred = *(MBB->pred_end()-1);
         ReplaceUsesOfBlockWith(Pred, MBB, FallThrough, TII);
       }