Add a new helper method to get log2(type alignment)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15887 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetData.cpp b/lib/Target/TargetData.cpp
index 8aea154..22dde60 100644
--- a/lib/Target/TargetData.cpp
+++ b/lib/Target/TargetData.cpp
@@ -21,6 +21,7 @@
#include "llvm/DerivedTypes.h"
#include "llvm/Constants.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
+#include "Support/MathExtras.h"
using namespace llvm;
// Handle the Pass registration stuff necessary to use TargetData's.
@@ -201,6 +202,12 @@
return Align;
}
+unsigned char TargetData::getTypeAlignmentShift(const Type *Ty) const {
+ unsigned Align = getTypeAlignment(Ty);
+ assert(!(Align & (Align-1)) && "Alignment is not a power of two!");
+ return log2(Align);
+}
+
/// getIntPtrType - Return an unsigned integer type that is the same size or
/// greater to the host pointer size.
const Type *TargetData::getIntPtrType() const {