Replace inferred getCast(V,Ty) calls with more strict variants.
Rename getZeroExtend and getSignExtend to getZExt and getSExt to match
the the casting mnemonics in the rest of LLVM.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32514 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/ConstantRange.cpp b/lib/Support/ConstantRange.cpp
index 2c21586..762d5c3 100644
--- a/lib/Support/ConstantRange.cpp
+++ b/lib/Support/ConstantRange.cpp
@@ -340,8 +340,8 @@
   Constant *Lower = getLower();
   Constant *Upper = getUpper();
 
-  return ConstantRange(ConstantExpr::getCast(Instruction::ZExt, Lower, Ty),
-                       ConstantExpr::getCast(Instruction::ZExt, Upper, Ty));
+  return ConstantRange(ConstantExpr::getZExt(Lower, Ty),
+                       ConstantExpr::getZExt(Upper, Ty));
 }
 
 /// truncate - Return a new range in the specified integer type, which must be
@@ -356,8 +356,8 @@
     return ConstantRange(getType());
 
   return ConstantRange(
-      ConstantExpr::getCast(Instruction::Trunc, getLower(), Ty),
-      ConstantExpr::getCast(Instruction::Trunc, getUpper(), Ty));
+      ConstantExpr::getTrunc(getLower(), Ty),
+      ConstantExpr::getTrunc(getUpper(), Ty));
 }