- Add MachineInstrBundle.h and MachineInstrBundle.cpp. This includes a function

  to finalize MI bundles (i.e. add BUNDLE instruction and computing register def
  and use lists of the BUNDLE instruction) and a pass to unpack bundles.
- Teach more of MachineBasic and MachineInstr methods to be bundle aware.
- Switch Thumb2 IT block to MI bundles and delete the hazard recognizer hack to
  prevent IT blocks from being broken apart.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146542 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 34 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/MachineInstrBundle.h b/include/llvm/CodeGen/MachineInstrBundle.h
new file mode 100644
index 0000000000..8c150e6d56
--- /dev/null
+++ b/include/llvm/CodeGen/MachineInstrBundle.h
@@ -0,0 +1,34 @@
+//===-- CodeGen/MachineInstBundle.h - MI bundle utilities -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provide utility functions to manipulate machine instruction
+// bundles.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_MACHINEINSTRBUNDLE_H
+#define LLVM_CODEGEN_MACHINEINSTRBUNDLE_H
+
+#include "llvm/CodeGen/MachineBasicBlock.h"
+
+namespace llvm {
+
+/// FinalizeBundle - Finalize a machine instruction bundle which includes
+/// a sequence of instructions starting from FirstMI to LastMI (inclusive).
+/// This routine adds a BUNDLE instruction to represent the bundle, it adds
+/// IsInternalRead markers to MachineOperands which are defined inside the
+/// bundle, and it copies externally visible defs and uses to the BUNDLE
+/// instruction.
+void FinalizeBundle(MachineBasicBlock &MBB,
+                    MachineBasicBlock::instr_iterator FirstMI,
+                    MachineBasicBlock::instr_iterator LastMI);
+  
+} // End llvm namespace
+
+#endif