From 99e0b2a8df7e3a49c0e1edd250d17604fe2fb21c Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Mon, 27 Jun 2011 04:20:45 +0000
Subject: [PATCH] Move onlyUsedByLifetimeMarkers to ValueTracking so that it
 can be used by other passes as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133904 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Analysis/ValueTracking.h           |  4 ++++
 lib/Analysis/ValueTracking.cpp                  | 16 ++++++++++++++++
 .../Utils/PromoteMemoryToRegister.cpp           | 17 +----------------
 3 files changed, 21 insertions(+), 16 deletions(-)

diff --git a/include/llvm/Analysis/ValueTracking.h b/include/llvm/Analysis/ValueTracking.h
index 6df1693c78e..d4354bb3ff8 100644
--- a/include/llvm/Analysis/ValueTracking.h
+++ b/include/llvm/Analysis/ValueTracking.h
@@ -158,6 +158,10 @@ namespace llvm {
     return GetUnderlyingObject(const_cast<Value *>(V), TD, MaxLookup);
   }
 
+  /// onlyUsedByLifetimeMarkers - Return true if the only users of this pointer
+  /// are lifetime markers.
+  bool onlyUsedByLifetimeMarkers(const Value *V);
+
 } // end namespace llvm
 
 #endif
diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp
index dab5aebd6c6..130e3ced42d 100644
--- a/lib/Analysis/ValueTracking.cpp
+++ b/lib/Analysis/ValueTracking.cpp
@@ -1783,3 +1783,19 @@ llvm::GetUnderlyingObject(Value *V, const TargetData *TD, unsigned MaxLookup) {
   }
   return V;
 }
+
+/// onlyUsedByLifetimeMarkers - Return true if the only users of this pointer
+/// are lifetime markers.
+///
+bool llvm::onlyUsedByLifetimeMarkers(const Value *V) {
+  for (Value::const_use_iterator UI = V->use_begin(), UE = V->use_end();
+       UI != UE; ++UI) {
+    const IntrinsicInst *II = dyn_cast<IntrinsicInst>(*UI);
+    if (!II) return false;
+
+    if (II->getIntrinsicID() != Intrinsic::lifetime_start &&
+        II->getIntrinsicID() != Intrinsic::lifetime_end)
+      return false;
+  }
+  return true;
+}
diff --git a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
index 32d1dcccd2e..e5a00f4e977 100644
--- a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
+++ b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
@@ -38,6 +38,7 @@
 #include "llvm/Analysis/DIBuilder.h"
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Analysis/InstructionSimplify.h"
+#include "llvm/Analysis/ValueTracking.h"
 #include "llvm/Transforms/Utils/Local.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallPtrSet.h"
@@ -73,22 +74,6 @@ struct DenseMapInfo<std::pair<BasicBlock*, unsigned> > {
 };
 }
 
-/// onlyUsedByLifetimeMarkers - Return true if the only users of this pointer
-/// are lifetime markers.
-///
-static bool onlyUsedByLifetimeMarkers(const Value *V) {
-  for (Value::const_use_iterator UI = V->use_begin(), UE = V->use_end();
-       UI != UE; ++UI) {
-    const IntrinsicInst *II = dyn_cast<IntrinsicInst>(*UI);
-    if (!II) return false;
-
-    if (II->getIntrinsicID() != Intrinsic::lifetime_start &&
-        II->getIntrinsicID() != Intrinsic::lifetime_end)
-      return false;
-  }
-  return true;
-}
-
 /// isAllocaPromotable - Return true if this alloca is legal for promotion.
 /// This is true if there are only loads and stores to the alloca.
 ///