Recommitting parts of r48130. These do not appear to cause the observed failures.

llvm-svn: 48223

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86RegisterInfo.h b/llvm/lib/Target/X86/X86RegisterInfo.h
index 8b010a92404..1c8f5e28b99 100644
--- a/llvm/lib/Target/X86/X86RegisterInfo.h
+++ b/llvm/lib/Target/X86/X86RegisterInfo.h
@@ -32,6 +32,15 @@ namespace N86 {
   };
 }
 
+namespace X86 {
+  /// SubregIndex - The index of various sized subregister classes. Note that 
+  /// these indices must be kept in sync with the class indices in the 
+  /// X86RegisterInfo.td file.
+  enum SubregIndex {
+    SUBREG_8BIT = 1, SUBREG_16BIT = 2, SUBREG_32BIT = 3
+  };
+}
+
 /// DWARFFlavour - Flavour of dwarf regnumbers
 ///
 namespace DWARFFlavour {