[llvm-commits] [llvm] r112323 - /llvm/trunk/lib/Analysis/LazyValueInfo.cpp

[Owen Anderson]

Author: resistor
Date: Fri Aug 27 18:29:38 2010
New Revision: 112323

URL: http://llvm.org/viewvc/llvm-project?rev=112323&view=rev
Log:
Improve the precision of getConstant().

Modified:
    llvm/trunk/lib/Analysis/LazyValueInfo.cpp

Modified: llvm/trunk/lib/Analysis/LazyValueInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/LazyValueInfo.cpp?rev=112323&r1=112322&r2=112323&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/LazyValueInfo.cpp (original)
+++ llvm/trunk/lib/Analysis/LazyValueInfo.cpp Fri Aug 27 18:29:38 2010
@@ -846,6 +846,11 @@
   
   if (Result.isConstant())
     return Result.getConstant();
+  else if (Result.isConstantRange()) {
+    ConstantRange CR = Result.getConstantRange();
+    if (const APInt *SingleVal = CR.getSingleElement())
+      return ConstantInt::get(V->getContext(), *SingleVal);
+  }
   return 0;
 }