From 582abddeee6bd49762d562d3e641a4e290d464be Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Tue, 18 Dec 2012 23:00:28 +0000
Subject: [PATCH] Verify bundle flag consistency when setting them.

Now that the bundle flag aware APIs are all in place, it is possible to
continuously verify the flag consistency.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170465 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/MachineInstr.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 2d4392c47db..3b83d02bb09 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -878,6 +878,7 @@ void MachineInstr::bundleWithPred() {
   setFlag(BundledPred);
   MachineBasicBlock::instr_iterator Pred = this;
   --Pred;
+  assert(!Pred->isBundledWithSucc() && "Inconsistent bundle flags");
   Pred->setFlag(BundledSucc);
 }
 
@@ -886,6 +887,7 @@ void MachineInstr::bundleWithSucc() {
   setFlag(BundledSucc);
   MachineBasicBlock::instr_iterator Succ = this;
   ++Succ;
+  assert(!Succ->isBundledWithPred() && "Inconsistent bundle flags");
   Succ->setFlag(BundledPred);
 }
 
@@ -894,6 +896,7 @@ void MachineInstr::unbundleFromPred() {
   clearFlag(BundledPred);
   MachineBasicBlock::instr_iterator Pred = this;
   --Pred;
+  assert(Pred->isBundledWithSucc() && "Inconsistent bundle flags");
   Pred->clearFlag(BundledSucc);
 }
 
@@ -902,6 +905,7 @@ void MachineInstr::unbundleFromSucc() {
   clearFlag(BundledSucc);
   MachineBasicBlock::instr_iterator Succ = this;
   --Succ;
+  assert(Succ->isBundledWithPred() && "Inconsistent bundle flags");
   Succ->clearFlag(BundledPred);
 }
 
-- 
2.34.1