Teach CodeGen's version of computeMaskedBits to understand the range metadata.

This is the CodeGen equivalent of r153747. I tested that there is not noticeable
performance difference with any combination of -O0/-O2 /-g when compiling
gcc as a single compilation unit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153817 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 1 deletions

diff --git a/include/llvm/CodeGen/MachineMemOperand.h b/include/llvm/CodeGen/MachineMemOperand.h
index eed4a76a34..1ac9080b75 100644
--- a/include/llvm/CodeGen/MachineMemOperand.h
+++ b/include/llvm/CodeGen/MachineMemOperand.h
@@ -84,6 +84,7 @@ class MachineMemOperand {
   uint64_t Size;
   unsigned Flags;
   const MDNode *TBAAInfo;
+  const MDNode *Ranges;
 
 public:
   /// Flags values. These may be or'd together.
@@ -105,7 +106,8 @@ public:
   /// MachineMemOperand - Construct an MachineMemOperand object with the
   /// specified PtrInfo, flags, size, and base alignment.
   MachineMemOperand(MachinePointerInfo PtrInfo, unsigned flags, uint64_t s,
-                    unsigned base_alignment, const MDNode *TBAAInfo = 0);
+                    unsigned base_alignment, const MDNode *TBAAInfo = 0,
+                    const MDNode *Ranges = 0);
 
   const MachinePointerInfo &getPointerInfo() const { return PtrInfo; }
   
@@ -140,6 +142,9 @@ public:
   /// getTBAAInfo - Return the TBAA tag for the memory reference.
   const MDNode *getTBAAInfo() const { return TBAAInfo; }
 
+  /// getRanges - Return the range tag for the memory reference.
+  const MDNode *getRanges() const { return Ranges; }
+
   bool isLoad() const { return Flags & MOLoad; }
   bool isStore() const { return Flags & MOStore; }
   bool isVolatile() const { return Flags & MOVolatile; }