Inline asm multiple alternative constraints development phase 2 - improved basic logic, added initial platform support.

llvm-svn: 117667
diff --git a/llvm/lib/Target/Alpha/AlphaISelLowering.h b/llvm/lib/Target/Alpha/AlphaISelLowering.h
index 46e0c7d..b429e9f 100644
--- a/llvm/lib/Target/Alpha/AlphaISelLowering.h
+++ b/llvm/lib/Target/Alpha/AlphaISelLowering.h
@@ -87,6 +87,11 @@
 
     ConstraintType getConstraintType(const std::string &Constraint) const;
 
+    /// Examine constraint string and operand type and determine a weight value.
+    /// The operand object must already have been set up with the operand type.
+    ConstraintWeight getSingleConstraintMatchWeight(
+      AsmOperandInfo &info, const char *constraint) const;
+
     std::vector<unsigned> 
       getRegClassForInlineAsmConstraint(const std::string &Constraint,
                                         EVT VT) const;