From: Alkis Evlogimenos <alkis@evlogimenos.com>
Date: Fri, 27 Aug 2004 04:00:26 +0000 (+0000)
Subject: Add MachineBasicBlock2IndexFunctor. This is useful for densemaps from
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6177d3f4481ef622ce8cc19bbde8709214881aec;p=oota-llvm.git

Add MachineBasicBlock2IndexFunctor. This is useful for densemaps from
MachineBasicBlocks to an arbitrary type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16068 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/CodeGen/MachineBasicBlock.h b/include/llvm/CodeGen/MachineBasicBlock.h
index 9d4ede6de1f..fb037402903 100644
--- a/include/llvm/CodeGen/MachineBasicBlock.h
+++ b/include/llvm/CodeGen/MachineBasicBlock.h
@@ -220,6 +220,16 @@ private:   // Methods used to maintain doubly linked list of blocks...
   }
 };
 
+// This is useful when building DenseMaps keyed on MachineBasicBlocks
+struct MachineBasicBlock2IndexFunctor
+  : std::unary_function<const MachineBasicBlock*, unsigned> {
+  unsigned operator()(const MachineBasicBlock* MBB) const {
+    assert(MBB->getNumber() != -1 &&
+           "MachineBasicBlock does not belong to a MachineFunction");
+    return MBB->getNumber();
+  }
+};
+
 
 //===--------------------------------------------------------------------===//
 // GraphTraits specializations for machine basic block graphs (machine-CFGs)