Let tablegen compute maximum lanemask for regs/regclasses.

Let tablegen compute the combination of subregister lanemasks for all
subregisters in a register/register class. This is preparation for further
work subregister allocation

llvm-svn: 223873

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/utils/TableGen/CodeGenRegisters.h b/llvm/utils/TableGen/CodeGenRegisters.h
index c1606e35703..6baaa28d95d 100644
--- a/llvm/utils/TableGen/CodeGenRegisters.h
+++ b/llvm/utils/TableGen/CodeGenRegisters.h
@@ -283,6 +283,8 @@ namespace llvm {
     int CopyCost;
     bool Allocatable;
     std::string AltOrderSelect;
+    /// Contains the combination of the lane masks of all subregisters.
+    unsigned LaneMask;
 
     // Return the Record that defined this class, or NULL if the class was
     // created by TableGen.
@@ -525,7 +527,7 @@ namespace llvm {
     void computeComposites();
 
     // Compute a lane mask for each sub-register index.
-    void computeSubRegIndexLaneMasks();
+    void computeSubRegLaneMasks();
 
   public:
     CodeGenRegBank(RecordKeeper&);