CodeGen: Add constructor for MIBuilder from a bundle_iterator, NFC

Don't require explicit conversions for creating a MachineInstrBuilder
from a bundle_iterator.

llvm-svn: 261500

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/include/llvm/CodeGen/MachineInstrBuilder.h b/llvm/include/llvm/CodeGen/MachineInstrBuilder.h
index 8fe9b280d5d..aea7f8e329a 100644
--- a/llvm/include/llvm/CodeGen/MachineInstrBuilder.h
+++ b/llvm/include/llvm/CodeGen/MachineInstrBuilder.h
@@ -51,6 +51,8 @@ public:
   /// Create a MachineInstrBuilder for manipulating an existing instruction.
   /// F must be the machine function that was used to allocate I.
   MachineInstrBuilder(MachineFunction &F, MachineInstr *I) : MF(&F), MI(I) {}
+  MachineInstrBuilder(MachineFunction &F, MachineBasicBlock::iterator I)
+      : MF(&F), MI(&*I) {}
 
   /// Allow automatic conversion to the machine instruction we are working on.
   operator MachineInstr*() const { return MI; }