From 40179bf8748b2729d6c733022428dfa1061325c9 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Fri, 24 Jun 2011 15:50:56 +0000
Subject: [PATCH] Simplify

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133798 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/TailDuplication.cpp | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/lib/CodeGen/TailDuplication.cpp b/lib/CodeGen/TailDuplication.cpp
index c798dd2049f..906a6f58cae 100644
--- a/lib/CodeGen/TailDuplication.cpp
+++ b/lib/CodeGen/TailDuplication.cpp
@@ -97,7 +97,7 @@ namespace {
     bool shouldTailDuplicate(const MachineFunction &MF,
                              bool IsSimple, MachineBasicBlock &TailBB);
     bool isSimpleBB(MachineBasicBlock *TailBB);
-    bool canCompletelyDuplicateBB(MachineBasicBlock &BB, bool IsSimple);
+    bool canCompletelyDuplicateBB(MachineBasicBlock &BB);
     bool duplicateSimpleBB(MachineBasicBlock *TailBB,
                            SmallVector<MachineBasicBlock*, 8> &TDBBs,
                            const DenseSet<unsigned> &RegsUsedByPhi,
@@ -573,7 +573,7 @@ TailDuplicatePass::shouldTailDuplicate(const MachineFunction &MF,
   if (!PreRegAlloc)
     return true;
 
-  return canCompletelyDuplicateBB(TailBB, IsSimple);
+  return canCompletelyDuplicateBB(TailBB);
 }
 
 /// isSimpleBB - True if this BB has only one unconditional jump.
@@ -606,30 +606,22 @@ bothUsedInPHI(const MachineBasicBlock &A,
 }
 
 bool
-TailDuplicatePass::canCompletelyDuplicateBB(MachineBasicBlock &BB,
-                                            bool isSimple) {
+TailDuplicatePass::canCompletelyDuplicateBB(MachineBasicBlock &BB) {
   SmallPtrSet<MachineBasicBlock*, 8> Succs(BB.succ_begin(), BB.succ_end());
 
   for (MachineBasicBlock::pred_iterator PI = BB.pred_begin(),
        PE = BB.pred_end(); PI != PE; ++PI) {
     MachineBasicBlock *PredBB = *PI;
 
-    if (isSimple) {
-      if (PredBB->getLandingPadSuccessor())
-        return false;
-      if (bothUsedInPHI(*PredBB, Succs))
-        return false;
-    } else {
-      if (PredBB->succ_size() > 1)
-        return false;
-    }
+    if (PredBB->succ_size() > 1)
+      return false;
 
     MachineBasicBlock *PredTBB = NULL, *PredFBB = NULL;
     SmallVector<MachineOperand, 4> PredCond;
     if (TII->AnalyzeBranch(*PredBB, PredTBB, PredFBB, PredCond, true))
       return false;
 
-    if (!isSimple && !PredCond.empty())
+    if (!PredCond.empty())
       return false;
   }
   return true;
-- 
2.34.1