For PR950:

This patch implements the first increment for the Signless Types feature.
All changes pertain to removing the ConstantSInt and ConstantUInt classes
in favor of just using ConstantInt.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31063 91177308-0d34-0410-b5e6-96231b3b80d8

docs/ProgrammersManual.html

@@ -2390,8 +2390,8 @@ provide a name for it (probably based on the name of the translation unit).</p>
 <div class="doc_text">
 
 <p>Constant represents a base class for different types of constants. It
-is subclassed by ConstantBool, ConstantInt, ConstantSInt, ConstantUInt,
-ConstantArray etc for representing the various types of Constants.</p>
+is subclassed by ConstantBool, ConstantInt, ConstantArray etc for representing 
+the various types of Constants.</p>
 
 </div>
 
@@ -2406,17 +2406,12 @@ ConstantArray etc for representing the various types of Constants.</p>
 <div class="doc_subsubsection">Important Subclasses of Constant </div>
 <div class="doc_text">
 <ul>
-  <li>ConstantSInt : This subclass of Constant represents a signed integer 
-  constant.
+  <li>ConstantInt : This subclass of Constant represents an integer constant.
     <ul>
-      <li><tt>int64_t getValue() const</tt>: Returns the underlying value of
-      this constant. </li>
-    </ul>
-  </li>
-  <li>ConstantUInt : This class represents an unsigned integer.
-    <ul>
-      <li><tt>uint64_t getValue() const</tt>: Returns the underlying value of 
-      this constant. </li>
+      <li><tt>int64_t getSExtValue() const</tt>: Returns the underlying value of
+      this constant as a sign extended signed integer value.</li>
+      <li><tt>uint64_t getZExtValue() const</tt>: Returns the underlying value 
+      of this constant as a zero extended unsigned integer value.</li>
     </ul>
   </li>
   <li>ConstantFP : This class represents a floating point constant.