Provide an isPowerOf2ByteWidth method for the IntegerType class. This will

mostly be used by back ends that wish to distinguish between integer types
that fit evenly within a natural integer type and those that don't.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33328 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/VMCore/Type.cpp b/lib/VMCore/Type.cpp
index 00e97520b7..b41d1a0414 100644
--- a/lib/VMCore/Type.cpp
+++ b/lib/VMCore/Type.cpp
@@ -975,6 +975,11 @@ const IntegerType *IntegerType::get(unsigned NumBits) {
   return ITy;
 }
 
+bool IntegerType::isPowerOf2ByteWidth() const {
+  unsigned BitWidth = getBitWidth();
+  return (BitWidth > 7 && Log2_32(BitWidth) == Log2_32_Ceil(BitWidth));
+}
+
 // FunctionValType - Define a class to hold the key that goes into the TypeMap
 //
 namespace llvm {