Add a couple of random comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111592 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index 6dbf0fc98ba5e45f28107d7bc5798be7fbfb221e..a61fca1f2529184fd59a4dd22db31b20c2ce5fae 100644 (file)
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -67,6 +67,7 @@ class ARMFastISel : public FastISel {
       Subtarget = &TM.getSubtarget<ARMSubtarget>();
     }
 
+    // Code from FastISel.cpp.
     virtual unsigned FastEmitInst_(unsigned MachineInstOpcode,
                                    const TargetRegisterClass *RC);
     virtual unsigned FastEmitInst_r(unsigned MachineInstOpcode,
@@ -95,6 +96,8 @@ class ARMFastISel : public FastISel {
     virtual unsigned FastEmitInst_extractsubreg(MVT RetVT,
                                                 unsigned Op0, bool Op0IsKill,
                                                 uint32_t Idx);
+                                                
+    // Backend specific FastISel code.
     virtual bool TargetSelectInstruction(const Instruction *I);
 
   #include "ARMGenFastISel.inc"