//
//===----------------------------------------------------------------------===//
-#define DL_NAME "delinearize"
-#define DEBUG_TYPE DL_NAME
#include "llvm/IR/Constants.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/Passes.h"
using namespace llvm;
+#define DL_NAME "delinearize"
+#define DEBUG_TYPE DL_NAME
+
namespace {
class Delinearization : public FunctionPass {
// Do not analyze memory accesses outside loops.
for (Loop *L = LI->getLoopFor(BB); L != nullptr; L = L->getParentLoop()) {
const SCEV *AccessFn = SE->getSCEVAtScope(getPointerOperand(*Inst), L);
+
+ const SCEVUnknown *BasePointer =
+ dyn_cast<SCEVUnknown>(SE->getPointerBase(AccessFn));
+ // Do not delinearize if we cannot find the base pointer.
+ if (!BasePointer)
+ break;
+ AccessFn = SE->getMinusSCEV(AccessFn, BasePointer);
const SCEVAddRecExpr *AR = dyn_cast<SCEVAddRecExpr>(AccessFn);
// Do not try to delinearize memory accesses that are not AddRecs.
if (!AR)
break;
+
O << "\n";
O << "Inst:" << *Inst << "\n";
O << "In Loop with Header: " << L->getHeader()->getName() << "\n";
-
O << "AddRec: " << *AR << "\n";
SmallVector<const SCEV *, 3> Subscripts, Sizes;
- const SCEV *Res = AR->delinearize(*SE, Subscripts, Sizes);
- int Size = Subscripts.size();
- if (Res == AR || Size == 0) {
+ AR->delinearize(*SE, Subscripts, Sizes, SE->getElementSize(Inst));
+ if (Subscripts.size() == 0 || Sizes.size() == 0 ||
+ Subscripts.size() != Sizes.size()) {
O << "failed to delinearize\n";
continue;
}
- O << "Base offset: " << *Res << "\n";
+
+ O << "Base offset: " << *BasePointer << "\n";
O << "ArrayDecl[UnknownSize]";
+ int Size = Subscripts.size();
for (int i = 0; i < Size - 1; i++)
O << "[" << *Sizes[i] << "]";
O << " with elements of " << *Sizes[Size - 1] << " bytes.\n";