Implement some helpers

llvm-svn: 13738

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/lib/VMCore/Constants.cpp b/llvm/lib/VMCore/Constants.cpp
index 3ed70089c1a..a393be98ae3 100644
--- a/llvm/lib/VMCore/Constants.cpp
+++ b/llvm/lib/VMCore/Constants.cpp
@@ -372,7 +372,17 @@ Constant *ConstantExpr::getShr(Constant *C1, Constant *C2) {
   return get(Instruction::Shr, C1, C2);
 }
 
+Constant *ConstantExpr::getUShr(Constant *C1, Constant *C2) {
+  if (C1->getType()->isUnsigned()) return getShr(C1, C2);
+  return getCast(getShr(getCast(C1,
+                    C1->getType()->getUnsignedVersion()), C2), C1->getType());
+}
 
+Constant *ConstantExpr::getSShr(Constant *C1, Constant *C2) {
+  if (C1->getType()->isSigned()) return getShr(C1, C2);
+  return getCast(getShr(getCast(C1,
+                        C1->getType()->getSignedVersion()), C2), C1->getType());
+}
 
 
 //===----------------------------------------------------------------------===//