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Add a new helper method to get log2(type alignment)

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15887 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-08-17 19:13:00 +00:00
parent cdab78f036
commit d2b0bb41f4
1 changed files with 7 additions and 0 deletions
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7
lib/Target/TargetData.cpp
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@ -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 @@ unsigned char TargetData::getTypeAlignment(const Type *Ty) const {
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 {