vendor/llvm/llvm-trunk-r178860

1 files changed, 36 insertions, 0 deletions

diff --git a/lib/Analysis/PtrUseVisitor.cpp b/lib/Analysis/PtrUseVisitor.cpp
new file mode 100644
index 000000000000..0a342b2167e4
--- /dev/null
+++ b/lib/Analysis/PtrUseVisitor.cpp
@@ -0,0 +1,36 @@
+//===- PtrUseVisitor.cpp - InstVisitors over a pointers uses --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+/// \file
+/// Implementation of the pointer use visitors.
+///
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/PtrUseVisitor.h"
+
+using namespace llvm;
+
+void detail::PtrUseVisitorBase::enqueueUsers(Instruction &I) {
+  for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
+       UI != UE; ++UI) {
+    if (VisitedUses.insert(&UI.getUse())) {
+      UseToVisit NewU = {
+        UseToVisit::UseAndIsOffsetKnownPair(&UI.getUse(), IsOffsetKnown),
+        Offset
+      };
+      Worklist.push_back(llvm_move(NewU));
+    }
+  }
+}
+
+bool detail::PtrUseVisitorBase::adjustOffsetForGEP(GetElementPtrInst &GEPI) {
+  if (!IsOffsetKnown)
+    return false;
+
+  return GEPI.accumulateConstantOffset(DL, Offset);
+}