add (and document) the ability for alias results to have

fixed physical registers.  Start moving fp comparison
aliases to the .td file (which default to using %st1 if
nothing is specified).

llvm-svn: 118352

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/utils/TableGen/CodeGenRegisters.h b/llvm/utils/TableGen/CodeGenRegisters.h
index ccd3d222bba..bbd0cefa580 100644
--- a/llvm/utils/TableGen/CodeGenRegisters.h
+++ b/llvm/utils/TableGen/CodeGenRegisters.h
@@ -57,6 +57,12 @@ namespace llvm {
       abort();
     }
     
+    bool containsRegister(Record *R) const {
+      for (unsigned i = 0, e = Elements.size(); i != e; ++i)
+        if (Elements[i] == R) return true;
+      return false;
+    }
+    
     // Returns true if RC is a strict subclass.
     // RC is a sub-class of this class if it is a valid replacement for any
     // instruction operand where a register of this classis required. It must