Move getCommonSubClass() into TRI.

It will soon need the context.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140896 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 10 insertions, 5 deletions

diff --git a/include/llvm/CodeGen/LiveStackAnalysis.h b/include/llvm/CodeGen/LiveStackAnalysis.h
index 8a8dcaf572..86c4d7c110 100644
--- a/include/llvm/CodeGen/LiveStackAnalysis.h
+++ b/include/llvm/CodeGen/LiveStackAnalysis.h
@@ -25,6 +25,8 @@
 namespace llvm {
 
   class LiveStacks : public MachineFunctionPass {
+    const TargetRegisterInfo *TRI;
+
     /// Special pool allocator for VNInfo's (LiveInterval val#).
     ///
     VNInfo::Allocator VNInfoAllocator;
diff --git a/include/llvm/CodeGen/MachineRegisterInfo.h b/include/llvm/CodeGen/MachineRegisterInfo.h
index db9352ff88..3866b2650d 100644
--- a/include/llvm/CodeGen/MachineRegisterInfo.h
+++ b/include/llvm/CodeGen/MachineRegisterInfo.h
@@ -25,6 +25,8 @@ namespace llvm {
 /// registers, including vreg register classes, use/def chains for registers,
 /// etc.
 class MachineRegisterInfo {
+  const TargetRegisterInfo *const TRI;
+
   /// IsSSA - True when the machine function is in SSA form and virtual
   /// registers have a single def.
   bool IsSSA;
diff --git a/include/llvm/Target/TargetRegisterInfo.h b/include/llvm/Target/TargetRegisterInfo.h
index 60cead6bac..e0e40054d2 100644
--- a/include/llvm/Target/TargetRegisterInfo.h
+++ b/include/llvm/Target/TargetRegisterInfo.h
@@ -481,6 +481,12 @@ public:
     return RegClassBegin[i];
   }
 
+  /// getCommonSubClass - find the largest common subclass of A and B. Return
+  /// NULL if there is no common subclass.
+  const TargetRegisterClass *
+  getCommonSubClass(const TargetRegisterClass *A,
+                    const TargetRegisterClass *B) const;
+
   /// getPointerRegClass - Returns a TargetRegisterClass used for pointer
   /// values.  If a target supports multiple different pointer register classes,
   /// kind specifies which one is indicated.
@@ -701,11 +707,6 @@ struct VirtReg2IndexFunctor : public std::unary_function<unsigned, unsigned> {
   }
 };
 
-/// getCommonSubClass - find the largest common subclass of A and B. Return NULL
-/// if there is no common subclass.
-const TargetRegisterClass *getCommonSubClass(const TargetRegisterClass *A,
-                                             const TargetRegisterClass *B);
-
 /// PrintReg - Helper class for printing registers on a raw_ostream.
 /// Prints virtual and physical registers with or without a TRI instance.
 ///