First chunk of MachineInstr bundle support.

1. Added opcode BUNDLE
2. Taught MachineInstr class to deal with bundled MIs
3. Changed MachineBasicBlock iterator to skip over bundled MIs; added an iterator to walk all the MIs
4. Taught MachineBasicBlock methods about bundled MIs

llvm-svn: 145975

1 files changed, 1 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/TailDuplication.cpp b/llvm/lib/CodeGen/TailDuplication.cpp
index 3a6211a0f3e..adfce863d0d 100644
--- a/llvm/lib/CodeGen/TailDuplication.cpp
+++ b/llvm/lib/CodeGen/TailDuplication.cpp
@@ -561,8 +561,7 @@ TailDuplicatePass::shouldTailDuplicate(const MachineFunction &MF,
   // Check the instructions in the block to determine whether tail-duplication
   // is invalid or unlikely to be profitable.
   unsigned InstrCount = 0;
-  for (MachineBasicBlock::const_iterator I = TailBB.begin(); I != TailBB.end();
-       ++I) {
+  for (MachineBasicBlock::iterator I = TailBB.begin(); I != TailBB.end(); ++I) {
     // Non-duplicable things shouldn't be tail-duplicated.
     if (I->getDesc().isNotDuplicable())
       return false;