Move Value.isDereferenceablePointer to ValueTracking [NFC]
Move isDereferenceablePointer function to Analysis. This function recursively tracks dereferencability over a chain of values like other functions in ValueTracking.
This refactoring is motivated by further changes to support dereferenceable_or_null attribute (http://reviews.llvm.org/D8650). isDereferenceablePointer will be extended to perform context-sensitive analysis and IR is not a good place to have such functionality.
Patch by: Artur Pilipenko <apilipenko@azulsystems.com>
Differential Revision: reviews.llvm.org/D9075
llvm-svn: 235611
diff --git a/llvm/lib/Analysis/MemDerefPrinter.cpp b/llvm/lib/Analysis/MemDerefPrinter.cpp
index 6119a3d..5903dc5 100644
--- a/llvm/lib/Analysis/MemDerefPrinter.cpp
+++ b/llvm/lib/Analysis/MemDerefPrinter.cpp
@@ -10,6 +10,7 @@
#include "llvm/Analysis/Passes.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/Analysis/MemoryDependenceAnalysis.h"
+#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/InstIterator.h"
@@ -53,7 +54,7 @@
for (auto &I: inst_range(F)) {
if (LoadInst *LI = dyn_cast<LoadInst>(&I)) {
Value *PO = LI->getPointerOperand();
- if (PO->isDereferenceablePointer(DL))
+ if (isDereferenceablePointer(PO, DL))
Vec.push_back(PO);
}
}