[llvm-branch-commits] [llvm-branch] r85269 - in /llvm/branches/Apple/Leela: include/llvm/CodeGen/MachineLoopInfo.h lib/CodeGen/MachineLoopInfo.cpp

[Bill Wendling]

Author: void
Date: Tue Oct 27 13:41:43 2009
New Revision: 85269

URL: http://llvm.org/viewvc/llvm-project?rev=85269&view=rev
Log:
$ svn merge -c 84596 https://llvm.org/svn/llvm-project/llvm/trunk
--- Merging r84596 into '.':
U    include/llvm/CodeGen/MachineLoopInfo.h
U    lib/CodeGen/MachineLoopInfo.cpp


Modified:
    llvm/branches/Apple/Leela/include/llvm/CodeGen/MachineLoopInfo.h
    llvm/branches/Apple/Leela/lib/CodeGen/MachineLoopInfo.cpp

Modified: llvm/branches/Apple/Leela/include/llvm/CodeGen/MachineLoopInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Leela/include/llvm/CodeGen/MachineLoopInfo.h?rev=85269&r1=85268&r2=85269&view=diff

==============================================================================
--- llvm/branches/Apple/Leela/include/llvm/CodeGen/MachineLoopInfo.h (original)
+++ llvm/branches/Apple/Leela/include/llvm/CodeGen/MachineLoopInfo.h Tue Oct 27 13:41:43 2009
@@ -38,6 +38,17 @@
 class MachineLoop : public LoopBase<MachineBasicBlock, MachineLoop> {
 public:
   MachineLoop();
+
+  /// getTopBlock - Return the "top" block in the loop, which is the first
+  /// block in the linear layout, ignoring any parts of the loop not
+  /// contiguous with the part the contains the header.
+  MachineBasicBlock *getTopBlock();
+
+  /// getBottomBlock - Return the "bottom" block in the loop, which is the last
+  /// block in the linear layout, ignoring any parts of the loop not
+  /// contiguous with the part the contains the header.
+  MachineBasicBlock *getBottomBlock();
+
 private:
   friend class LoopInfoBase<MachineBasicBlock, MachineLoop>;
   explicit MachineLoop(MachineBasicBlock *MBB)

Modified: llvm/branches/Apple/Leela/lib/CodeGen/MachineLoopInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Leela/lib/CodeGen/MachineLoopInfo.cpp?rev=85269&r1=85268&r2=85269&view=diff

==============================================================================
--- llvm/branches/Apple/Leela/lib/CodeGen/MachineLoopInfo.cpp (original)
+++ llvm/branches/Apple/Leela/lib/CodeGen/MachineLoopInfo.cpp Tue Oct 27 13:41:43 2009
@@ -43,3 +43,31 @@
   AU.addRequired<MachineDominatorTree>();
   MachineFunctionPass::getAnalysisUsage(AU);
 }
+
+MachineBasicBlock *MachineLoop::getTopBlock() {
+  MachineBasicBlock *TopMBB = getHeader();
+  MachineFunction::iterator Begin = TopMBB->getParent()->begin();
+  if (TopMBB != Begin) {
+    MachineBasicBlock *PriorMBB = prior(MachineFunction::iterator(TopMBB));
+    while (contains(PriorMBB)) {
+      TopMBB = PriorMBB;
+      if (TopMBB == Begin) break;
+      PriorMBB = prior(MachineFunction::iterator(TopMBB));
+    }
+  }
+  return TopMBB;
+}
+
+MachineBasicBlock *MachineLoop::getBottomBlock() {
+  MachineBasicBlock *BotMBB = getHeader();
+  MachineFunction::iterator End = BotMBB->getParent()->end();
+  if (BotMBB != prior(End)) {
+    MachineBasicBlock *NextMBB = next(MachineFunction::iterator(BotMBB));
+    while (contains(NextMBB)) {
+      BotMBB = NextMBB;
+      if (BotMBB == next(MachineFunction::iterator(BotMBB))) break;
+      NextMBB = next(MachineFunction::iterator(BotMBB));
+    }
+  }
+  return BotMBB;
+}