#include "llvm/DerivedTypes.h"
#include "llvm/InlineAsm.h"
#include "llvm/Instructions.h"
+#include "llvm/Intrinsics.h"
#include "llvm/Module.h"
#include "llvm/ADT/StringExtras.h"
using namespace llvm;
!CI->getType()->isInteger())
return false;
- const Type *Ty = CI->getType();
- const char *IntName;
- if (const IntegerType *ITy = dyn_cast<IntegerType>(Ty)) {
- unsigned BitWidth = ITy->getBitWidth();
- if (BitWidth == 16)
- IntName = "llvm.bswap.i16";
- else if (BitWidth == 32)
- IntName = "llvm.bswap.i32";
- else if (BitWidth == 64)
- IntName = "llvm.bswap.i64";
- else
- return false;
- } else
+ const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
+ if (!Ty || Ty->getBitWidth() % 16 != 0)
return false;
-
+
// Okay, we can do this xform, do so now.
+ const Type *Tys[] = { Ty, Ty };
Module *M = CI->getParent()->getParent()->getParent();
- Constant *Int = M->getOrInsertFunction(IntName, Ty, Ty, (Type*)0);
+ Constant *Int = Intrinsic::getDeclaration(M, Intrinsic::bswap, Tys, 2);
Value *Op = CI->getOperand(1);
Op = new CallInst(Int, Op, CI->getName(), CI);