From 7c2a4a30e0e16762c75adacebd05ec9fcbccf16b Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 6 Dec 2011 22:12:01 +0000
Subject: 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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145975 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/MachineInstr.cpp | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

(limited to 'lib/CodeGen/MachineInstr.cpp')

diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index b0ef9d401a..abe6645909 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -735,6 +735,20 @@ void MachineInstr::addMemOperand(MachineFunction &MF,
   MemRefsEnd = NewMemRefsEnd;
 }
 
+bool MachineInstr::hasProperty(unsigned short MCFlag) const {
+  if (getOpcode() != TargetOpcode::BUNDLE)
+    return getDesc().getFlags() & (1 << MCFlag);
+
+  const MachineBasicBlock *MBB = getParent();
+  MachineBasicBlock::const_insn_iterator MII = *this; ++MII;
+  while (MII != MBB->end() && MII->isInsideBundle()) {
+    if (MII->getDesc().getFlags() & (1 << MCFlag))
+      return true;
+    ++MII;
+  }
+  return false;
+}
+
 bool MachineInstr::isIdenticalTo(const MachineInstr *Other,
                                  MICheckType Check) const {
   // If opcodes or number of operands are not the same then the two
@@ -789,6 +803,17 @@ bool MachineInstr::isIdenticalTo(const MachineInstr *Other,
 /// block, and returns it, but does not delete it.
 MachineInstr *MachineInstr::removeFromParent() {
   assert(getParent() && "Not embedded in a basic block!");
+
+  // If it's a bundle then remove the MIs inside the bundle as well.
+  if (getOpcode() == TargetOpcode::BUNDLE) {
+    MachineBasicBlock *MBB = getParent();
+    MachineBasicBlock::insn_iterator MII = *this; ++MII;
+    while (MII != MBB->end() && MII->isInsideBundle()) {
+      MachineInstr *MI = &*MII;
+      ++MII;
+      MBB->remove(MI);
+    }
+  }
   getParent()->remove(this);
   return this;
 }
@@ -798,6 +823,16 @@ MachineInstr *MachineInstr::removeFromParent() {
 /// block, and deletes it.
 void MachineInstr::eraseFromParent() {
   assert(getParent() && "Not embedded in a basic block!");
+  // If it's a bundle then remove the MIs inside the bundle as well.
+  if (getOpcode() == TargetOpcode::BUNDLE) {
+    MachineBasicBlock *MBB = getParent();
+    MachineBasicBlock::insn_iterator MII = *this; ++MII;
+    while (MII != MBB->end() && MII->isInsideBundle()) {
+      MachineInstr *MI = &*MII;
+      ++MII;
+      MBB->erase(MI);
+    }
+  }
   getParent()->erase(this);
 }
 
-- 
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