Change MachineBasicBlock's to not be Annotations, instead they are kept as

part of a linked list tracked by MachineFunction.  MachineBasicBlock::get
is now linear time instead of constant time, and thus is deprecated!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4337 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index b9c017a459..15036a4d07 100644
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -72,6 +72,21 @@ Pass *createMachineCodeDestructionPass() {
 }
 
 
+// get - This deprecated static method returns the MachineBasicBlock object
+// for the specified BasicBlock.
+//
+MachineBasicBlock& MachineBasicBlock::get(const BasicBlock *BB) {
+  const Function *F = BB->getParent();
+  MachineFunction &MF = MachineFunction::get(F);
+
+  for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
+    if (I->getBasicBlock() == BB)
+      return *I;
+  assert(0 && "MachineBasicBlock object not found for specified block!");
+  return get(BB);
+}
+
+
 //===---------------------------------------------------------------------===//
 // MachineFunction implementation
 //===---------------------------------------------------------------------===//